Carlos Bengoechea

Carlos Bengoechea
Universidad de Sevilla | US · Chemical Engineering

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77
Publications
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1,684
Citations
Citations since 2017
47 Research Items
1292 Citations
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Publications

Publications (77)
Article
Full-text available
Keratin is a largely available protein that can be obtained from the ca. 3 million tons of feathers that the European poultry industry produces as a side-stream. Here, the functionalization of keratin from poultry feathers was evaluated using a one- versus two-stage process using two functionalization agents (succinic anhydride-SA and ethylene dian...
Article
Society demands that new strategies for learning processes put a greater focus on the students. Thus, new methods must be implemented in higher education studies, leaving guided learning, which is evaluated at the end of the course. The high percentage of abandonment of university studies calls for the implementation of teaching systems in which st...
Article
A surface characterization of two types of unmodified chitosan properties with different molecular weight (MW) and deacetylation degree (DD) was carried out in terms of polymer concentration (a concentration lower than the saturation, the saturation concentration and a supersaturated concentration). The modification of the production conditions all...
Article
Full-text available
The production of green plastic materials from defatted silkworm meal (SW) through a scalable technique (e.g., injection moulding) would permit the revalorization of a by-product of the textile industry. The textile by-product contains an estimable protein content (~50%) which can justify its applicability in the field of eco-materials. Thus, SW-ba...
Article
Full-text available
The seaweed Rugulopteryx okamurae, from the Pacific Ocean, is considered an invasive species in the Mediterranean Sea. In this work, the use of this seaweed is proposed for the development of bio-based plastic materials (bioplastics) as a possible solution to the pollution produced by the plastic industry. The raw seaweed Rugulopteryx okamurae was...
Chapter
Food nanoemulsions or double emulsions can be used as delivery systems for bioactive ingredients, either hydrophilic (e.g. peptides, protein hydrolysates) or lipophilic (e.g. essential fatty acids), resulting in health-promoting food products highly demanded by consumers. A critical factor in developing kinetically stable emulsions and adequate del...
Article
Either ozone or ultrasound pretreatment was applied to identify and evaluate their effect over the protein fraction of Desmodesmus sp. and Tetradesmus obliquus biomass cultivated in wastewater. Studies of SDS-PAGE, protein solubility, sulfhydryl and disulphide bond contents, and DSC were performed to evaluate the effect of each pretreatment on abun...
Article
Full-text available
Chitosan-pectin hydrogels were prepared, and their rheological properties were assessed in order to select the best system to develop scaffolds by 3D printing. Hydrogels showed a weak gel behavior with shear thinning flow properties, caused by the physical interactions formed between both polysaccharides, as observed by FTIR analysis. Since systems...
Article
Inulin is a prebiotic ingredient which is increasingly used by food industry, due to its health-promoting and techno functional properties. In the present work, the effect of the addition of different concentrations of inulin (0.25, 0.5, 1, 2.5, 5, 7.5 and 10 % wt.) on the properties of food foams stabilized by 0.25 % wt. β-lactoglobulin has been s...
Article
Full-text available
The replacement of plastic materials derived from petroleum derivatives by highly biodegradable materials has been pursued to counteract the global environmental damage caused by their accumulated landfilling. In this sense, the feasibility of a soy protein isolate (SPI) to obtain processed materials has been extensively documented. In the present...
Article
Ultrasound pre-treatment and protein extraction of Desmodesmus sp. and Tetradesmus obliquus biomass induced residual microalgae/polycaprolactone (PCL) biocomposites with higher viscoelastic and mechanical properties as injection mould temperature increased. This was probably associated to the promotion of microalgae proteins-PCL interactions. The P...
Chapter
The global market of superabsorbent materials (SAMs) has been estimated at 7.5 billion € in 2017 and is expected to keep growing annually at a rate of 6.2%. Most SAMs used nowadays are based on acrylic derivatives, but their toxicity, low biodegradability and petrochemical nature, together with their high price and incompatibility with agricultur...
Chapter
Even though proteins have been used for the development of plastic materials for a long time, their use has not proliferated when compared to other plant materials, such as starch or cellulose. Moreover, the current trend in the bioplastic market is based on polylactic acid or polyhydroxycarbonates, such that a feasible and globally accepted formul...
Article
Full-text available
Porcine plasma protein is a by-product of the meat industry, which has already been applied in the manufacture of superabsorbent materials. The effects of plasticizer content (0%, 25%, 50%), together with those of the drying method (freeze-drying, thermal drying at 50 °C), during the processing of superabsorbent porcine plasma matrices were studied...
Article
The present work focuses on assessing the ability of porcine plasma protein (PPP) to be electrospun to form satisfactory fiber mats and their rheological and morphology characteristics. Porcine plasma is a by-product of the meat industry that is produced in a much larger amount than demanded by the market. Thus, its revalorization through the devel...
Article
Full-text available
Composite materials based on proteins and carbohydrates normally offer improved water solubility, biodegradability, and biocompatibility, which make them attractive for a wide range of applications. Soy protein isolate (SPI) has shown superabsorbent properties that are useful in fields such as agriculture. Alginate salts (ALG) are linear anionic po...
Article
Full-text available
The nature of the plasticizer fraction within a bioplastic matrix is of extreme importance. Thus, brittleness has sometimes been observed when water has been used. The goal of the present manuscript has been to assess the effects of the addition of sucrose and trehalose in gluten-based bioplastics either in presence or absence of water. It was foun...
Article
The present work focuses on the assessment of the ability of porcine plasma protein (PPP) to be electrospun satisfactorily to form fibre mats, and their rheological and morphological characterization. Porcine plasma is a by-product of meat industry that is produced in an amount much larger than the market's demand, resulting in a surplus. Thus, its...
Article
Full-text available
A great amount of biowastes, comprising byproducts and biomass wastes, is originated yearly from the agri-food industry. These biowastes are commonly rich in proteins and polysaccharides and are mainly discarded or used for animal feeding. As regulations aim to shift from a fossil-based to a bio-based circular economy model, biowastes are also bein...
Article
Full-text available
The replacement of common acrylic derivatives by biodegradable materials in the formulation of superabsorbent materials would lessen the associated environmental impact. Moreover, the use of by-products or biowastes from the food industry that are usually discarded would promote a desired circular economy. The present study deals with the developme...
Article
Superabsorbent materials, showing water absorption higher than 1000 wt. %, are traditionally formulated on acrylic derivatives, which are expensive and with low biodegradability. The massive use of non-biodegradable plastic materials has caused a serious environmental impact which specially affects oceans and seas. Thus, their replacement by biopla...
Article
3D-printing, also known as additive manufacturing, is a polymeric processing technique whose use has been increasing strongly in recent decades. Because of its customizing potential, it is being widely applied in a great variety of fields, such as medicine, engineering, microelectronic, or food. The present work was focused on the determination of...
Article
Gluten-based plastics represent an interesting biodegradable alternative to conventional plastics, due to their greater mechanical properties when compared to other protein-based materials. In this manuscript, the effect that both blend mixing and the presence of sugars exerts on the gluten-based material properties was evaluated through rheologica...
Article
A suitable selection of the plasticizer in the formulation of plastic materials is a fundamental step to achieve the convenient physical and thermomechanical properties for each final application. Polyols have been extensively used as plasticizers in the production of many bioplastics, mostly glycerol. The present work assesses the influence of the...
Article
Emulsion stability is the primary requirement for the industrial applications of many commercial food products. This work analyses the importance of rheology on the characterisation of protein-adsorbed systems, from complex fluid-fluid interfaces to bulk emulsions, as well as their relationship to the stability behaviour of the final emulsion. To a...
Article
Porphyra dioica macroalgae can be regarded as a food-grade protein source that can be used for the stability of dispersed food systems. This work is focused on the foaming properties of a seaweed protein concentrate (SWE) from Porphyra dioica. The characterisation of air-water (A/W) interfacial layers formed after the SWE adsorption was carried out...
Article
Nowadays, as the world population is in need of creating alternative materials that can replace conventional plastics, microalgae biomass may be identified as a viable source for producing more environmentally friendly materials. Scenedesmus sp and Desmodesmus sp are the main components (~80%) of a microalgae consortium (MC) that first has been use...
Article
Novatein is a thermoplastic produced from blood meal and is used in different agricultural applications. Novatein has some unique processing challenges and its rheology was studied using screw‐driven capillary rheometry, with a particular focus on sheet extrusion using ethylene glycol, glycerol, propylene glycol (PG), or triethylene glycol (TEG) as...
Article
Full-text available
The goal if this work has been to assess the influence of a health promoting hydrocolloid, such as kefiran, in oil in water emulsions (O/W: 50/50) containing whey protein isolate (1.0 % wt.). Different kefiran concentration levels (0, 0.25, 0.5, 1 % wt.) were studied, observing a shift from a fluid‐like to a solid‐like behaviour and higher viscosit...
Article
Full-text available
Most protein concentrates used by the food industry are derived from soybean or wheat, but a pseudocereal like quinoa is gaining interest worldwide. The aim of this study is the characterization of the emulsification properties of two quinoa protein concentrates obtained through alkaline extraction (pH 9 (Q9) and 11 (Q11)), followed by precipitatio...
Article
The present manuscript focuses on the effect of pH on the thermomechanical and water uptake properties of plasma protein-based bioplastics. Therefore, pH was modified through addition of either an acid or a base and subsequent freeze drying. Flours obtained were then blended with a plasticizer (glycerol) in a 1/1 ratio, and next injection-moulded t...
Chapter
Inulin is a natural polysaccharide that is commonly used as food ingredient due to its noteworthy functional and prebiotic properties, as well as biological effects. Moreover, inulin may be used as a thickening agent improving the kinetical stability of thermodynamically unstable food emulsions through an increase in the viscosity of the continuous...
Chapter
As porcine plasma protein is mostly used as ingredient in foods (e.g. frankfurters) where water holding capacity is required, the feasibility of using it in the development of superabsorbent materials is considered in the present work. Plasma protein is blended with glycerol, which acts as plasticizer, at a 1:1 ratio, and subsequently injection-mou...
Article
Recently, bioplastic have generated an increasing interest as an alternative to conventional plastics. For this reason, their manufacture using the traditional techniques used for the production of plastics, such as extrusion, would help transferring bioplastics production to an industrial scale. In this way, the preparation of wheat gluten bioplas...
Article
The aim of this study deals is the development of superabsorbent green composite materials based on food industry by-products that could be revalorised. Plasma porcine protein (PPP) and soy protein isolate (SPI) are surpluses of the food industry that content a high amount of hydrophilic amino acid residues. Thus, different PPP/SPI blends (0/100, 2...
Article
Full-text available
Inulin is a prebiotic ingredient that is being increasingly used in food formulations as fat replacer. The present manuscript focuses on the formation of gels formed from inulin aqueous dispersions, observing the effect of inulin content, ranging from 25 to 50 wt%, and of the presence of calcium salts (chloride, lactate) at different concentrations...
Article
Full-text available
Bioplastics have gained great interest in recent years as a potential alternative to conventional plastics, since they are renewable and biodegradable materials. However, their mechanical properties are not able to match those of conventional plastics yet. In this context, the incorporation of additives to improve those properties of bioplastics is...
Article
Porcine plasma protein (PPP), a by-product of the meat industry, is considered for the development of eco-friendly superabsorbent materials due to its relatively high content in polar amino acids. Using glycerol (Gly) as plasticizer, different PPP/Gly ratios (50/50, 55/45, 60/40) were injection moulded at different moulding temperatures (60-120 °C)...
Article
Los materiales superabsorbentes son aplicables en campos tan diversos como productos de higiene personal o liberación controlada de nutrientes en agricultura. El presente estudio pretende el desarrollo de materiales biodegradables a partir de una materia prima natural, un aislado de proteína de soja, cuya aplicación supondría una disminución en el...
Article
The objective of this study was to assess the influence of reducing pH from its native value on the heat-induced gelation behaviour of egg yolk by monitoring its linear viscoelastic properties. Three acids differing in their location in the Hofmeister series were used (hydrochloric, citric, and phosphoric acids) at pH between 2 and 6. The viscoelas...
Article
Superabsorbent materials have found several applications in fields related to diapers, hygienic tissues or controlled release in agriculture. In order to produce more environmentally-friendly materials, some efforts have been focused on grafting copolymerization of acrylic derivatives onto a natural compound (e.g. protein, poly-saccharide). This ma...
Article
Inulin is a prebiotic ingredient that is being increasingly used in food formulations as fat replacer. Even if no significant surface activity has been reported for this natural polysaccharide, it can be used as ingredient in Oil in Water (O/W) emulsions that would benefit from its potential thickening effect of the continuous phase. In this manusc...
Article
The addition of salts, like sodium bicarbonate (SB) or carbonate (SC), into the formulation of bioplastic materials may alter their hydrophilic character to a significant extent. Soy protein isolate (SPI) is a byproduct of the soybean oil industry, which, when properly blended with glycerol (GL), can be further processed through a lab‐scale injecti...
Article
Full-text available
This manuscript studies the relation between macroscopic properties of the soy protein isolate (SPI)-based superabsorbent polymers (SAP) (e.g., water uptake capacity and tensile properties) and the extent of chemical modification conducted on the protein. The increase in the carboxyl group content, obtained from electrometric titrations, for acylat...
Article
A natural superabsorbent polymer (SAP) material based on an acylated soy protein was studied as a green alternative to non-biodegradable SAP. In order to obtain the natural SAPs, different amounts of succinic anhydride were used as acylating agent. Once the functionalized protein was obtained, it was mixed thoroughly with glycerol and then molded t...
Article
The specific aim of this work was to study the capability of a carob protein isolate (CPI) to produce self-supporting gels when subjected to a thermal treatment. CPI aqueous dispersions (10, 20 and 30 wt% protein basis) at three different pH values (2, 6 and 10) were subjected to a heating/cooling process (95 °C–30 min/4 °C–24 h) leading to the for...
Article
Even if most superabsorbent polymers (SAP) used nowadays are synthetic, natural-based SAP hydrogels have been gaining recently special attention due to their biocompatibility and degradability. The present manuscript studies the feasibility of obtaining hydrogels via soy protein functionalization using ethylenediaminetetraacetic dianhydride (EDTAD)...
Article
This study aims to extend the range of applications of tragacanth gum by studying its incorporation into bioplastics formulation, exploring the influence that different gum contents (0–20 wt.%) exert over the thermomechanical and water uptake properties of bioplastics based on egg white albumen protein (EW). The effect of plasticizer nature was als...
Article
Kefiran is a neutral polysaccharide constituted by glucose and galactose produced by Lactobacillus kefiranofaciens. It is included into kefir grains and has several health promoting properties. In the present work, shear and extensional properties of different kefiran aqueous dispersions (0.5, 1 and 2%wt.) were assessed and compared to other neutra...
Article
The optimization of the processing conditions in the production of soy protein bioplastics by injection molding has been essential in order to develop materials with a great capacity to absorb water while displaying good mechanical properties. Using a 50/50 (wt/wt) soy protein/glycerol mixture, and 40°C, 500 bar, and 70°C as reference values for cy...
Article
Two well-known proteins have been selected in order to produce bioplastics through injection molding: a soy protein isolate (SPI) and an egg white albumen concentrate (EW). Each of them has been thoroughly mixed with glycerol (40 wt %) and the blend then obtained have been characterized by means of rheological and thermomechanical techniques, which...
Article
The effects of composition of the plasticizer fraction and storage conditions on the physical and thermomechanical properties of egg albumen/tragacanth gum based bioplastics were studied. Thus, glycerol (G) and water (W) were used as plasticizers at different G/W ratios (1:0, 3:1, 1:1, 1:3, 0:1), keeping the biopolymer fraction always at 60% (w/w)....
Article
The influence of adding different polysaccharides (locust bean gum, LBG; methyl cellulose, MC; and carboxymethyl cellulose, CMC) to gluten-based biodegradable polymeric materials was assessed in this work. Gluten/polysaccharide/plasticiser bioplastics were prepared at different polysaccharide concentrations (0–4.5%) and pH values by mixing in a two...
Article
Full-text available
Protein–protein crosslinks play an important role in the design of biodegradable polymeric materials requiring suitable rheological and mechanical properties. The addition of aldehydes to the bioplastic formulation may result in their involvement in some form of protein cross-linking. The objective of this contribution is to evaluate the effect of...
Article
The effect of composition, storage conditions and temperature over the rheological properties of dough-like materials prepared within a mixing-rheometer was studied using different egg albumen protein/glycerol ratios: 50/50, 60/40 and 65/35. As protein/glycerol ratio increases from 50/50 to 65/35, the mechanical spectra display a dramatic increase...
Chapter
The book describes the new advances in the science and technology of hydrocolloids which are used in food and related systems. The focus is on the technofunctionality and the biofunctionality of hydrocolloids, giving an appropriate emphasis to the manipulative skills of the food scientist and recognising the special part hydrocolloids can play in s...
Article
Protein-polysaccharide complexes may be used for the development of delivery systems with applications in several industries. In the present work, the interaction of lactoferrin (LF, 0.2wt%) with a High-Methoxyl pectin (0.005-0.15wt%) in aqueous solutions was studied at different pH values (2-7) and temperatures (30-90 degrees C) at low ionic stren...
Article
The influence of pH and two post-emulsification treatments (pH modification and thermal cycles) over linear dynamic viscoelasticity and droplet size distribution, DSD, of O/W emulsions (75% oil) stabilized either by soy protein isolate, SPI, or wheat gluten, WG were studied in the present work. Rheological properties and droplet size of fresh emuls...
Article
Linear viscoelastic properties of locust bean gum (LBG), carob protein isolate (CPI) and LBG–CPI aqueous dispersions were studied at different concentration and pH values. LBG and CPI dispersions show marked different linear viscoelasticity behaviour. The former system exhibits a fluid-like behaviour for all the concentrations considered (2–4 wt.%)...
Article
The physical stability of several food systems depends strongly on their interfacial properties, which may be modified by adding proteins and low-molecular-weight surfactants to their formulation. This study deals with the possibility of using wheat gluten to alter the surface and interfacial properties of an aqueous system, considering the effects...
Article
Highly concentrated oil-in-water (O/W; 25:75 wt%) emulsions stabilized by crayfish flour (CF) have been subjected to thermal treatments in order to study potential enhancements on gel strength of the network structures formed among oil droplets, involving adsorbed and non-adsorbed protein segments. Application of in situ thermal treatments, monitor...
Article
Full-text available
Oil-in-water (o/w) emulsions stabilized by egg yolk, with a composition similar to those found in commercial mayonnaises or salad dressings, were processed in a semicontinuous device. This specially designed emulsification device consists of, basically, a vessel provided with an anchor impeller, where the continuous phase was initially placed; a pu...
Article
Highly concentrated oil-in-water (o/w) emulsions stabilized by crayfish flour at high pH were characterized by means of linear dynamic viscoelasticity and droplet size distribution (DSD) analysis. Power consumption and temperature were recorded as a function of emulsification time at different agitation speeds. The emulsions studied followed a gel-...
Article
The effect of protein concentration (0.125–1 wt%) on linear viscoelastic properties and microstructure of O/W emulsions stabilized by carob protein was studied. Similar results were obtained in previous studies with gluten and soya proteins. All the emulsions showed a significant linear viscoelastic range, which increased with protein concentration...
Chapter
The science and technology of hydrocolloids used in food and related systems has seen many new developments and advances over recent years. This book presents the latest research from leading experts in the field. Some of the topics covered within this book include biochemical characterisation, the use of antibodies, immunostaining and enzyme hydro...
Article
Full-text available
Droplet Size Distribution (DSD) and linear viscoelastic properties of concentrated o/w emulsions stabilized by different proteins (crayfish, gluten and soybean) have been studied. A typical behaviour of highly concentrated emulsions with a high degree of flocculation has been found. An increase in energy input for the emulsification process or in e...
Article
Full-text available
This study was focused on the analysis of the chemical composition of defatted carob germ flour and the protein isolate. The amino acid composition and the nature of the subunits that compose carob germ proteins were also studied. Isolate was obtained by alkaline extraction followed by isoelectric precipitation of proteins. Results showed that an i...
Article
Full-text available
Droplet Size Distribution (DSD) and linear viscoelastic properties of concentrated o/w emulsions stabilized by different proteins (crayfish, gluten and soybean) have been studied. A typical behaviour of highly concentrated emulsions with a high degree of flocculation has been found. An increase in energy input for the emulsification process or in e...
Article
Full-text available
This work deals with the viability of using three plant proteins (gluten, soybean and carob proteins) as emulsifiers in concentrated O/W emulsions (75 wt% oil). All the emulsions have been processed in a rotor-stator device (Ultra-Turrax T50), studying the influence of composition (protein and oil concentration) and rotor speed on the rheological p...
Article
The effects of moisture content (25–45% wwb) and temperature (75–120 °C) on the viscosity of gluten, soya and rennet casein systems was studied using a capillary rheometer. An attempt was made to relate the viscosities to the glass transition temperature measured by differential scanning calorimetry, dynamic mechanical thermal analysis and the phas...
Article
Highly concentrated oil-in-water (o/w) emulsion stabilised by means of gluten and soya protein isolate (SPI) at low pH have been characterized by means of linear dynamic viscoelasticity and droplet size distribution analysis (DSD). The microstructure of these emulsions has been characterized at a colloidal level by using confocal laser scanning mic...

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Projects (2)
Project
The overall objective is the implementation of innovative bioeconomy solutions to valorize biological waste for absorbent and electroactive porous materials. This proposal implies a coordinated strategy for the use of biowaste as raw materials to create industrially viable, sustainable and competitive products.
Project
OVERVIEW There is an increasing need to shift towards the development of sustainable and environmentally friendly materials in the world market nowadays. Superabsorbents polymers (SAP) are a good example of this new type of materials, being based on renewable natural components with a lower cost. Notwithstanding, the production and commercialization of biocompatible and biodegradable SAP are still very limited, which makes the need of research on this field pretty clear. The project pretends to cover that need establishing as its main objective the development of new materials that display a great water absorption capacity (absorbents and superabsorbents). These materials will be produced from natural renewable sources (e.g. proteins obtained as agro-food industry byproducts or protein-polysaccharide mixtures) through techniques commonly used in the plastic industry. These materials not only should possess a great water absorption capacity but they should present proper mechanical properties and biodegradability, so they could represent an attractive choice to those obtained from synthetic polymers. The development of superabsorbent biopolymers (SAB) requires an in-depth knowledge of the physical chemical and functional properties of the proteins to be used, as well as of the processing techniques for the polymeric matrixes (extrusion, compression or injection moulding), of the production of nanofibers (electrospinning) and of the post-processing techniques (extraction of the seggregated phase and lyophilization). The formulation and processing of these materials will be evaluated through their physical chemical properties, pretending to obtain the best performance of the materials for certain applications, always aiming a high water absorption capacity, but not forgetting the study of their rheological, mechanical and biodegradability properties, which finally impose some restrictions related to the need of keeping adequate mechanical integrity and Eco compatibility. The potential improvement of water absorption capacity when including in the formulation clay nanoparticles and preferably polymeric nanofibers, as well as other additives intended to improve the hydrophilic properties of the matrix (reducing, denaturing or effervescence-producing reagents) will be evaluated. At a later stage, a funtionalization of the protein will be carried out to potentially improve SAB materials as a choice to synthetic acrylic polymers in hygienic and health related applications. Eventually, the acquisition of scientific knowledge and the establishment of the technological base needed for the success in the development of those biodegradable absorbent and superabsorbent matrixes will be pursued with the different project activities. The main characteristics of these materials defined by their final use would be: high specific surface area and porosity, high water absorption capacity, high water holding capacity, adequate mechanical integrity and biodegradability. Moreover, the potential of SAP materials produced for hygienic and horticulture applications will be assessed studying the effect of the addition of micronutrients and its release. Finally, a sustainability report for SAB materials will be made for both applications. KEY WORDS: Superabsorbent, Biopolymers, Bioplastic, Biodegradable, Mixing, Extrusion, Inyection, Electrospinning, Rheology