Essam Saber Abd El-Sayed

National Research Center, Egypt | NRC · Cellulose and Paper

Although styrene acrylate emulsions (SAE) have demonstrated promising applications as surface sizing agents for paper, their strengthening effect on pulp fibers in papermaking is not clear. In this study, bagasse fibers, an agricultural waste, were treated with SAE to study the influences on the mechanical properties of the produced papers. SAE cop...

A novel adsorbent was prepared using a backbone comprising chemically hybridized dialdehyde cellulose (DAC) with chitosan via Schiff base reaction, followed by graft copolymerization of acrylic acid. Fourier transform infrared spectroscopy (FTIR) confirmed the hybridization while scanning electron microscopy (SEM) revealed intensive covering of chi...

The coating of the particleboard often challenges researchers in the wood industry, and only a small portion of the literature focuses on particleboard coating, practically and academically. This study focuses on the properties of pigmented coatings that mix acrylic-styrene latex with alkyd latex on the particleboards made from castor stalk. By tes...

The possibility of manufacturing edible packaging materials with tailored properties and low cost has attracted much interest. This work presents a new material for edible packaging made from flaxseed gum (FSG) and chitosan (Ch) loaded with zinc oxide nanoparticles (ZnO‐NPs). ZnO‐NPs were synthesized in situ during the preparation of the edible fil...

"This study evaluates the efficiency of nanocomposite films prepared from cellulose nanofibers (CNF) isolated from rice straw and different ratios of shellac in terms of film properties, in addition to using a CNF/shellac mixture for coating paper sheets. The CNF/shellac nanocomposite films were prepared by the casting procedure. The weight percent...

shelf life of foods

Non-wood raw materials are an essential fiber source in regions where forest resources are limited. Therefore, chemi-mechanical high-yield bagasse pulp was prepared and then bleached with a dithionite bleaching agent. One- and two-stage bleaching of the pulp was carried out by using sodium dithionite (Y) as a sole bleaching agent, or after bleachin...

The present study aimed to prepare cellulose-based biodegradable hydrogel that revealing a potential control of drug release. To achieve this purpose, activation of cellulose was achieved firstly by pretreatment stage using ZnCl2. Then, selective oxidation of activated cellulose was performed by using sodium periodate to achieve cleavage of the bon...

The paper sheets nanocomposite of cellulose pulp/ carboxymethyl cellulose/ hydroxyapatite nanoparticles (CP/CMC/HA-NPs) were synthesis with different ratios of HA-NPs. Also the effects of the prepared paper sheets nanocomposite in the removal of Fe2+, Cu+2 and Cd2+ ions were studied. Two types of pulps were used in this investigation, the recycled...

The current situation of the pulp and paper industry in Egypt

Fundamentals of Packaging Technology

Food packaging is the earliest application of nano technology in food industries. About 400-500 nano-packaging products are estimated to be in commercial use at the moment. The annual growth rate is estimated to be 11.6%.

Conventional kraft pulps need chlorine chemicals to be bleached to full brightness. The reactivity of the residual lignin of kraft pulps towards alkaline peroxide bleaching was significantly increased by pretreatment with peroxyformic acid (PFA) alone or in combination with other non-chlorine bleaching sequences. Three different Milox bleaching seq...

How to manufacture the paper and what are the types of paper used in the packaging

In order to evaluate the effect of alkali concentration on soaking yield and on the properties of the pulp obtained by subsequent oxygen cooking, the oxygen pressure, anthraquinone charge, cooking time, temperature and liquor to bagasse ratio were studied. It can be concluded that, the best delignification results by different alkali soaking and su...

The New Technology of Metal Packaging Materials

Mixed office waste paper (MOWP) is a low cost, high quality and easily collected fiber source for the papermaking industry. Unfortunately, limits in the application of traditional deinking are related to the negative environmental impacts of using chemicals during the deinking process. Hence, enzymatic deinking has received growing attention in the...

Nanotechnology and its applications in food packaging

Brief notes about the plastics and their types used in our lives in detail for undergraduate students.

Mixed office waste paper (MOWP) is a low cost, high quality and easily collected fiber source for the papermaking industry. Unfortunately, limits in the application of traditional deinking are related to the negative environmental impacts of using chemicals during the deinking process. Hence, enzymatic deinking has received growing attention in the...

Pulp and paper industry in the world have been growing fast. As a result, there has been a massive request for pulp and paper raw materials. The raw materials used in papermaking can be classified into three groups: wood, non-wood, and recycled wastepaper. The Non-wood raw material is an important fiber resource in the regions where forest resource...

The present study introduces a new technique using combined up-flow anaerobic sludge bed (UASB) reactor followed by innovative downflow hanging non-woven fabric (DHNW) reactor for treating of sewage. The packing material used in this study could be produced from waste plastic bottles, thus huge part of solid waste can be reduced, recycled and reuse...

The chitosan/polyacrylic acid/polypyrrole/loaded with silver nanoparticles (CS/PAA/PPy/Ag-NPs) bionanocomposite as conductive, biodegradable, and biocompatible hydrogels were prepared by the casting method. Silver nanoparticles (Ag-NPs) were incorporated into the prepared bionanocomposite hydrogels to reinforce the electrical conductivity as well a...

Paper Packaging Paper derives its name from the reedy plant “papyrus”, which the ancient Egyptians used to produce the world's first writing material by beating and pressing together thin layers of the plant stem. The first authentic papermaking - the formation of a cohesive sheet from the rebonding of separated fibers - has been attributed to Tsai...

In today's society, packaging is pervasive and essential. It surrounds, enhances and protects the goods we buy, from processing and manufacturing, through handling and storage, to the final consumer. Without packaging, materials handling would be a messy, inefficient and costly exercise and modem consumer marketing would be virtually impossible. Th...

The package must protect its contents from external threats including spoilage, breakage, damage from external environmental conditions, pilfering and theft. Primary, secondary and tertiary packaging must be designed so that the product stays in perfect condition until it reaches the end user. The package must be strong and durable enough to protec...

The paper sheets nanocomposite of cellulose pulp/ carboxymethyl cellulose/ hydroxyapatite nanoparticles (HA-NP) were prepared with different ratios of HA-NPs. Two types of cellulose pulps were used, the recycled wastepaper pulp (RWP) and the bleached wood pulp (BWP) to prepare RWP/CMC/HA-NPs and BWP/CMC/HA-NPs, respectively. The characterizations o...

The main goal of this paper was to replacement of most paraformaldehyde (PF) by mimosa tannin based resins as a binder agent in particleboard manufacture. Physical and mechanical properties of the fabricated particleboards were studied to evaluate its quality. The physical properties involved thickness swelling and water absorption, whereas mechani...

THIS 220°C), WORK in addition is concerned to the with time the of study exposure of the on impact cedar of and heat sycamore (160, 180, woods 200 and for different times (2, 4 and 6 hours). The change in the color of the wood was studied. The mechanical properties, rate of mass loss, and decreases on the density of the heat treated woods were eval...

The current research presents an efficient, cheap, and safe antimicrobial material for widespread use based on copper nanoparticles (Cu-NPs) loaded on cellulose acetate (CA) matrix. A reduction process of CuSO4·5H2O has been performed to prepare Cu-NPs. The nanosized copper particles included oxidized Cu (15–20 nm). Two different loads of Cu-NPs we...

THIS WORK is concerned with the study of the impact of heat (160, 180, 200 and 220°C), in addition to the time of exposure on cedar and sycamore woods for different times (2, 4 and 6 hours). The change in the color of the wood was studied. The mechanical properties, rate of mass loss, and decreases on the density of the heat treated woods were eval...

THE attractedAVAILABILITY the researcherof interestsnatural tofibers reutilizein Egypt this agriculturalsuch asbagasse biomassrice forstraw the developmentcorn husk,etc of natural fiber reinforced composites for diversity valuable applications. Recently the utilization of bio-fillers in thermoplastics composites has increased. Polystyrene is a ther...

Cotton linters were hydrolyzed with different concentrations of HCl (2.5-15%) to prepare microcrystalline cellulose. Infrared spectroscopy and thermal analysis were used to follow the effect of hydrolysis on the molecular structure of the produced microcrystalline cellulose. The loss in weight and the degree of polymerization of the produced hydrol...

Carboxylation of cotton linters was investigated relative to its use in ion exchange. The effects of different treatments of cotton linters, such as alkali, acid, and activating agents, e.g. LiCl, on the molecular structure and carboxylation of cotton linters were taken in our consideration. The absence or presence of a crosslinking was considered,...

Wood pulp with different functional groups (phosphorylated, sulphonated and phosphorylated carboxylated) with or without crosslinking is preparation. Molecular structure of the prepared cation exchanger is analyzed by infrared. A new band was seen at 1200, 1400 and 1713 cm-1 for phosphorylated, sulfonated and carboxylated wood pulp respectively. Cr...

Paper sheets and cellophane membrane ion exchangers are prepared by incorporation of phosphate groups onto them. The effect of reacting time and phosphorous oxychloride concentration on the phosphorylation process are studied. The efficiency of the prepared ion exchanger membranes toward metal ions uptake (Ni2+, Mn2+ and Cr3+) from their solution i...

Conventional kraft pulps need chlorine chemicals to be bleached to full brightness. The reactivity of the residual lignin of kraft pulps towards alkaline peroxide bleaching was significantly increased by pretreatment with peroxyformic acid (PFA) alone or in combination with other non-chlorine bleaching sequences. Three different Milox bleaching seq...

Different types of antioxidants compounds were prepared economically from natural sources. Application of these compounds towards photo stabilization of high yield bagasse pulp has been investigated.

Purpose To evaluate the effects of different levels of quaternised pyrodextrin as wet‐end and filler retention aid additives in papermaking. Design/methodology/approach The pulp furnishes used in this study were a mixture of bleached rice straw pulp with bleached sulphite softwood pulp at a ratio of 60:40. The beaten pulps (never dried) were treat...

This work is intended to promote the suitability of newsprint paper waste as one component of light-weight composite panels, using gypsum as a binder. The manufacture of agro-gypsum panels from corn stalks, a light lignocellulosic material, was taken as a basis for comparison. Promoting the newsprint paper involved carrying out two series of trials...

The potential use of Samaar moor (Juncus aculus) plant as fibrous material in papermaking is evaluated. The chemical analysis and fibre characteristics of this plant are determined for better understanding of its behavior in papermaking. Samaar morr stalks are subjected to sulphur-free three-stage (peroxyformic acid, formic acid, peroxyformic acid)...

The po te nti a l use of Samaar morr (JIlIIC IIS (/ClIllIs) pbn t as fibrou s materi a l in pape rmaki ng is eval uated. T he chemica l ana lys is and fibre c haracte ri sti cs o f thi s plant arc determined fo r bell er unders tandin g o f its behav ior in papermaking. S'lmaar mOlT stalks arc subj ected 10 sulphur-free three-stage (peroxy fo rmi c...

This study examines the effects of using magnesium chloride as a precipitating agent of sodium silicate on the mechanical, optical and fire retardant properties of the resulting paper sheets. Two types of treatments (internal and external), were carried out to investigate such effects on the paper sheets prepared from wood pulp and from non-wood fi...

In order to evaluate the effect of alkali concentration on soaking yield and on the properties of the pulp obtained by subsequent oxygen cooking, the oxygen pressure, anthraquinone charge, cooking time, temperature and liquor to bagasse ratio were studied. It can be concluded that, the best delignification results by different alkali soaking and su...

Describes the novel utilization of waste newsprint paper as inexpensive agro-fibers for production of lightweight building panels. Thermal gravimetric analysis of treated news paper fibers was studied as a method for testing fire retardancy of agro-fibers in light building panels. The activation energy of degradation stages was evaluated by applyin...

In X-ray diffraction analysis studies for different pulping methods in this study, it was found that the half height width (H.H.W.) do not vary much from one method of pulping to the other, but they are all lower than that of the starting bagasse. Moreover, the crystallinity indices for different bagasse pulps are in good agreement with the results...

Studies were carried out on the preparation of a new chemical pulp from non-woody cellulosic materials by H2O2 - alkaline pulping of depithed sugar cane bagasse. The cooking liquor was a mixture of water, sodium hydroxide as Na2O (15% on raw material), varying amount of H2O2 from 1-4% on raw material and small quantities of auxiliary (EDTA). The li...