Saviour A. Umoren

Saviour A. Umoren
King Fahd University of Petroleum and Minerals | KFUPM · Interdisciplinary Research Center for Advanced Materials

PhD

About

213
Publications
130,451
Reads
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13,112
Citations
Citations since 2017
89 Research Items
8758 Citations
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201720182019202020212022202305001,0001,500
201720182019202020212022202305001,0001,500
Introduction
A polymer and materials scientist with internationally recognized teaching and research skills. Research is focused on polymer composite synthesis and characterization, organic coatings and extensively on investigating materials corrosion and corrosion inhibition mechanisms on conventional polycrystalline as well as nanocrystalline surfaces. Research effort has been recognized globally by over one hundred publications in the area and several conference presentations.
Additional affiliations
December 2012 - present
King Fahd University of Petroleum and Minerals
Position
  • Professor (Associate)
August 2012 - October 2012
Institute of Theoretical and Applied Physical Chemistry (INIFTA), La Plata, Argentina
Position
  • Research Associate
May 2009 - April 2010
Institute of Metal Research, Chinese Academy of Sciences, Shenyang
Position
  • PostDoc Position
Education
August 2003 - June 2008
Federal University of Technology, Akure
Field of study
  • Polymer Science
January 1992 - April 1994
Federal University of Technology, Akure
Field of study
  • Polymer Science and Engineering
October 1986 - August 1990
University of Jos
Field of study
  • Applied Chemistry

Publications

Publications (213)
Article
Full-text available
Rumex vesicarius (RVE) mediated chitosan–AgNPs composite was produced in situ by using an aqueous extract of Rumex vesicarius leaves as the reducing agent to reduce Ag+ to Ag0. The synthesized composite was evaluated as a sweet (CO2) corrosion inhibitor (CI) for C1018 carbon steel (CS) in 3.5 wt% NaCl solution under static and hydrodynamic conditio...
Article
The limiting factor towards the utilization of Mg and its alloys especially in aqueous environment is their low corrosion resistance occasioned by their high chemical reactivity and high electron negative potential. The corrosion inhibitor technology is one of the effective corrosion mitigation approaches. In this review, inorganic, organic (surfac...
Article
Full-text available
Chitosan–copper oxide (CHT–CuO) nanocomposite was made by an in-situ method utilizing olive leaf extract (OLE) as reductant. The OLE mediated CHT–CuO nanocomposite containing varying amount of chitosan (0.5, 1.0 and 2.0 g) was evaluated as corrosion inhibitor for X60 carbon steel in 5 wt% hydrochloric acid solution. The corrosion inhibitive perform...
Article
Full-text available
This work describes the first report of the known glycosidic constituents β-sitosterol-3-O-β-d-glucoside-6'-palmitate (1), β-sitosterol-3-O-β-d-glucoside (2), momor-cerebroside I (3), phytolacca cerebroside (4), 1,2-di-O-palmitoyl-3-O-(6-sulfoquinovopyranosyl)-glycerol (5), isorhamnetin-3-robinobioside (6), and isorhamnetin-3-rutinoside (7) from th...
Article
Full-text available
Oil well acidizing, although a stimulation process, induces the corrosion of metallic equipment and well tubing. There is, at present, a high demand for effective and less toxic high temperature corrosion inhibitors for the acidizing process due to the failing of the existing inhibitors at high temperatures occasioned by increases in the well depth...
Article
Full-text available
Chitosan-copper oxide (CHT-CuO) nanocomposite was synthesized using olive leaf extract (OLE) as reducing agent and CuSO4⋅5H2O as precursor. CHT-CuO nanocomposite was prepared using an in situ method in which OLE was added to a solution of chitosan and CuSO4⋅5H2O mixture in the ratio of 1:5 (v/v) and heated at a temperature of 90 °C. The obtained CH...
Article
The present work reports on the corrosion inhibition property of compounds isolated from butanolic extract of Date Palm leaves for low carbon steel in 15% HCl solution. Six compounds were isolated from Date Palm leaves and purified using a combination of column chromatography, thin layer chromatography, and Prep HPLC-MS system. The isolated compoun...
Chapter
Conductive polymers are organic polymers that conduct electricity. They may have metallic conductivity or can be semiconductors. At present, there is growing interest in the utilization of conducting polymers (CPs) for protection against metal corrosion. The combination of the properties of the classical metals, semiconductors, and polymers make CP...
Chapter
This chapter discusses in detail the corrosion inhibition characteristics of polyaspartic acid (PASP) and poly(vinylpyridine). Aspartic acid has three pKa values and can exist in any one of four charges: +1, 0, –1, or –2, depending on the pH of the solution. The multiple acid-base equilibria have an effect on the corrosion inhibiting property of as...
Chapter
The application of pectin, a high-molecular-weight heteropolymer with a preponderance of galacturonic acid units as metals corrosion inhibitor is discussed in this chapter. The chapter begins by discussing the classes, sources, preparation, and the general properties of pectin. Pectin is a promising green metals corrosion inhibitor. However, its in...
Chapter
Gums are water-soluble materials and organic nonstarch polysaccharides that have found wide use in industrial applications mostly because of their nontoxic nature. They have demonstrated good corrosion inhibition ability for various substrates in diverse corrosive environments. This chapter takes a look at the corrosion inhibition performance of gu...
Chapter
Polyethers are a class of polymers that are characterized by the —O— connection. They can be either aliphatic or aromatic, and the common members are polyethylene oxide (PEO), polypropylene oxide (PPO), and polytetrahydrofuran. PEO and PPO are the polyethers with information on their anticorrosion property. This chapter discusses their performance...
Chapter
Polyols are viscous liquids or waxy solids, depending on the molecular weight and hydroxyl content, with superior lubricity and solvency properties. Polyethylene glycol (PEG) and polypropylene glycol (PPG) are two polyols the corrosion inhibitive abilities of which have been extensively studied. This chapter begins by discussing the chemistries of...
Chapter
Copolymerization is a chemical modification technique that is adopted to overcome certain weaknesses of polymers as metal corrosion inhibitors and to enhance their inhibition performance. The chapter begins with the fundamentals of copolymers, considering the different classes of copolymers, such as the random copolymers, the alternating copolymers...
Chapter
Acrylic is a generic term denoting a derivative of acrylic and methacrylic acid, including acrylic esters and compounds containing nitrile and amide groups. Three types of acrylic polymers have been extensively studied for their corrosion inhibition properties: polyacrylic acid (PAA), polymethacrylic acid (PMMA), and polyacrylamide. The synthesis o...
Chapter
The anticorrosion properties of three natural polymers, namely, gelatin, dextrin, and dextran, are discussed in this chapter. The chapter begins by providing background information on each of the polymers, including their synthesis, properties, and applications. Since a single compound rarely provides the needed inhibition performance, the various...
Chapter
Inhibition of wet metal corrosion by organic-based inhibitors occurs by an adsorption mechanism, which is the gradual replacement of adsorbed water molecules on a metal surface by inhibitor molecules as a result of the interaction between the metal surface and inhibitor molecules. Macromolecules such as polymers can be adsorbed on a metal surface t...
Chapter
This chapter briefly highlights the basic concept of polymeric materials. It covers basic concepts such as definition, classification, general properties, polymerization reactions and their kinetics, and polymerization systems.
Chapter
Chitosan is a biopolymer that is derived from chitin. It has attracted significant, scientific and industrial interest, owing to its peculiar macromolecular structure, biocompatibility, biodegradability, and other intrinsic functional properties. At a commercial scale, chitosan is obtained by deacetylation of its parent polymer chitin. This chapter...
Chapter
Corrosion, which is commonly defined as the deterioration of a material (usually a metal) or its properties because of a reaction with its environment, is a global problem. NACE International, the Corrosion Society, estimates that global corrosion and its consequences cost developed nations about 3%–5% of GDP or GNP. Methods that are commonly emplo...
Chapter
Starch is an attractive raw material in the pharmaceuticals, paper-making, textile, and food preparation industries because of its renewability, biodegradability, and affordability. It is also useful in the oil and gas industries, mostly as additive in drilling muds. This chapter begins by highlighting the preparation of starch and the physical and...
Chapter
Resins are viscous compounds that cure into stiff polymers and contain reactive end groups, such as acrylates or epoxides. The presence of these polar functional groups confers corrosion-inhibiting characteristics. This chapter looks at the performance of different types of polymer resins as corrosion inhibitors. The epoxy resins are widely studied...
Chapter
Chitosan as a single compound can barely achieve the desired anticorrosion effect. Chemical modifications, such as functionalization, copolymerization, and grafting, can enhance chitosan’s corrosion inhibition performance. This chapter takes a look at the synthesis of chitosan derivatives and the inhibitive performance of the derivatives in compari...
Chapter
Vinyl polymers are polymers made from vinyl monomers. In relation to corrosion inhibition applications the most important vinyl polymers are polyvinyl alcohol (PVA) and polyvinyl pyrrolidone (PVP). PVA is a water-soluble synthetic polymer. Depending on the hydrolysis conditions, PVA could be fully hydrolyzed or partially hydrolyzed. PVP or povidone...
Chapter
Alginate is an anionic and hydrophilic polysaccharide. It is one of the most important biosynthesized natural materials and is derived primarily from two sources: marine plants and bacteria. Some physical and chemical properties of alginates are highlighted in this chapter. Alginates have gained application as metals corrosion inhibitor because of...
Chapter
This chapter highlights the fundamentals of corrosion inhibition, covering the definition of corrosion inhibitors, different classes of corrosion inhibitors, factors affecting the effectiveness of corrosion inhibitors, and different techniques employed to determine corrosion rate and inhibitor efficiency as well as surface analysis approaches adopt...
Chapter
Cellulose is an organic molecule and a linear polysaccharide. Cellulose ethers, which are derived by the substitution of the hydrogen atoms of the hydroxyl groups with alkyl groups, are the most promising as corrosion inhibitors. The most investigated as metal corrosion inhibitors are carboxymethyl cellulose, methyl cellulose, ethyl cellulose, hydr...
Chapter
This chapter discusses in detail the corrosion inhibition characteristics of polyamide and polyethyleneimine. The synthesis steps of these polymers are given. Other synthetic polymers, such as polyvinyl acetate, polyoxazoline, poly(aminoquinoline), and poly(cyanurateamine), are also considered in this chapter.
Chapter
This chapter comprehensively considers the corrosion inhibition performance of carrageenan, tragacanth gum, Acacia sieberiana, Khaya senegalensis, Albizia ferruginea, Albizia zygia, Anogeissus leiocarpus gum, Canarium schweinfurthii, Pachylobus edulis exudate gum, Raphia hookeri, Commiphora kestingii gum, Commiphora pedunculata, Daniellia oliveri g...
Chapter
Dendrimers are a special class of polymers with exciting characteristics, such as high solubility and viscosity, nanosize dimension, monodispersity, compact and globular structure, as well as multiple adsorption centers. They are classified based on shape, end functional groups, and internal cavities into simple, liquid crystalline, chiral, micella...
Chapter
This chapter discusses the basic concepts of polymeric materials. It covers molecular weight and molecular weight distribution, the concept of copolymerization, and the application of polymers in packaging, as scale inhibitors, in the biomedical field, as adsorbents, and in enhancing oil recovery.
Book
Polymeric Materials in Corrosion Inhibition: Fundamentals and Applications brings together the very latest information and techniques in the preparation and application of a broad range of polymeric materials as corrosion inhibitors in diverse corrosive environments. Sections introduce the fundamentals of polymeric materials, corrosion and corrosio...
Patent
environmentally friendly corrosion inhibitor for ferrous and non ferrous alloys subject to descaling operation.
Article
Full-text available
Date palm leaves (DPL) was extracted using acetone (ACE), ethanol (ETH), aqueous (AE), butanol (BUT), methanol (METH), isopropanol (ISO), and ethyl acetate (EHY ACT). The extracts were characterized using Fourier-transform infrared spectroscopy (FTIR) and ultraviolet-visible (UV-vis) spectroscopy. The various solvent DPL extracts were screened for...
Article
Full-text available
The phytochemical analysis of the butanolic extract from the leaves of date palm of Saudi origin resulted in the isolation of three major constituents, oleanolic acid (1), vanillyl alcohol (2), and β-sitosterol-3-O-β-d-glucoside (3), which had not been isolated from this plant or previously reported. Together, compounds 1 and 2 account for 1.0% of...
Article
Full-text available
The quest to replace toxic chemicals in the nearest future is revolutionizing the corrosion inhibitor research world by turning its attention to plant biomaterials. Herein, we report the corrosion inhibiting potential of butanolic extract of date palm leaves (BUT) on the corrosion of API 5L X60 carbon steel in 15 wt.% HCl solution. The mass loss, e...
Article
A green and cost-effective inhibitor based on Date palm leaves extract was formulated for use during acid cleaning of thermal desalination plants. The inhibitor formulation designated as F1 was tested against the corrosion of ferrous-based alloys namely: carbon steel, Ni-resist, and 316L stainless steel in 2% HCl solution at 40 °C under static and...
Article
Full-text available
N¹,N¹-diallyl-N⁶,N⁶,N⁶-tripropylhexane-1,6-diaminium chloride (NDTHDC) and its polymer poly(N¹,N¹-diallyl-N⁶,N⁶,N⁶-tripropylhexane-1,6-diaminium chloride) (poly-NDTHDC) were synthesized and tested against API X60 carbon steel corrosion in 15 wt % HCl solution. Weight loss, electrochemical, and surface analysis techniques were used. Results show tha...
Article
Full-text available
In this study, Kola nut extract (KE) was evaluated for inhibiting ability towards low carbon steel corrosion in 1 M HCl solution using weight loss and electrochemical techniques. The surface of the corroded carbon steel was examined by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (A...
Patent
The present invention relates to a method of inhibiting corrosion of steel in contact with a corrosive solution. The method involves mixing an olive leaf extract titanium nanocomposite with the corrosive solution. The olive leaf extract titanium nanocomposite may be made by reducing TiCl4 with olive leaf extract, which form nanoparticles with an av...
Article
Full-text available
Due to strict environmental regulations, the use of toxic chemicals as corrosion inhibitors for the oil-well acidizing is restricted. Environmentally benign Vanillin-modified chitosan (Van-Cht) is synthesized using a microwave-induced green synthetic protocol and thoroughly characterized by FTIR and NMR spectroscopy. The inhibitor has been evaluate...
Article
Being a natural and renewable polysaccharide, pectin (PC) is considered a polymer with promising potential for many applications. In the present investigation, novel multifunctional pectin/polypyrrole (PC/PPy) composite coatings loaded with gentamicin (GM) were electrochemically deposited on TiNbZr alloy to enhance its biocompatibility, antibacteri...
Chapter
Lower-grade steel materials are the most commonly used construction materials for oil and gas wells due to their low cost and high performance. However, they are susceptible to corrosion when they come in contact with corrosive environments that are highly acidic. In oil wells, particularly deep oil wells, hydrogen sulphide (H2S) is commonly found....
Chapter
Over the years, the oil and gas industries have been bedridden with the problem of metallic structure's corrosion. The consequences of corrosion are enormous, ranging from financial to life lost. The use of corrosion inhibitors is, perhaps, the most cost‐effective approach. Inorganic particularly chromate‐rich inhibitors have been very effective in...
Article
Full-text available
Chitosan/silver nanofluids were prepared using Phoenix dactylifera (DPLE) or Rumex vesicarius (HEL) extracts as the reducing agent, characterized using Fourier-transform infrared spectroscopy (FTIR), ultraviolet–visible (UV-vis), X-ray diffraction (XRD), and transmission electron microscope (TEM). The antimicrobial effect of the nanofluids against...
Chapter
The addition of chemical additives has been considered as a standard operation in water treatment systems. This chapter discusses the chemical additives used for the control of corrosion in desalination systems. Specifically, corrosion inhibitors for various metallurgies, biocides, and oxygen scavengers are covered. The pros and cons of the additiv...
Book
https://onlinelibrary.wiley.com/doi/book/10.1002/9783527822140
Article
Full-text available
Seven natural polymers namely, chitosan (CHI), dextran (Dex), carboxymethyl cellulose (CMC), sodium alginate (ALG), pectin (PEC), hydroxylethyl cellulose (HEC), and Gum Arabic (GA) were screened for anticorrosion property towards AZ31 Mg alloy in 3.5 wt.% NaCl solution. CHI, Dex, CMC, PEC, and GA accelerated the corrosion while ALG and HEC moderate...
Article
An imidazoline, 2-heptadecyl-1-[2-(octadecanoylamino)ethyl]-2- imidazoline (QSI) with -C17H35 as the tail chain length was synthesized, characterized, and studied as corrosion inhibitor for low carbon steel in 15% HCl solution under static and hydrodynamic conditions. Influence of addition of KI, temperature, and chain length of pendant hydrocarbon...
Article
A benzimidazole derivative, 2-(2-bromophenyl)-1-methyl-1H-benzimidazole (2BPB) has been studied as a corrosion inhibitor for Cu-Ni 70/30 and 90/10 alloys in 1 mol/dm3 at low and high temperatures using the weight loss, electrochemical (potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), & cyclic voltammetry (CV)), and...
Article
The potential of an environmentally friendly novel synthesized and characterized isoxazoli-dine derivative namely 5-(4-dodecyloxy-3-methoxybenzyl)-2-methylisoxazolidine (DMBMI)as anticorrosion agent for carbon steel in 1 mol/L HCl solution was investigated using gravimetric and electrochemical techniques. Kinetics parameters of the corrosion proces...
Article
Metallic pipelines and gathering tanks play a vital role during oil and gas exploration, production, transmission, and processing. These facilities are usually attacked by corrosion. The use of corrosion inhibitors is one of the most economical and reliable approaches to control the corrosion of oil and gas metallic facilities. This paper looks at...
Article
There is a high demand of effective and eco-friendly corrosion inhibitor for industrial applications. In an attempt to prepare a benign and effective corrosion inhibitor for acidizing purpose, an imidazoline derivative, N-(2-(2-tridecyl-4,5-dihydro-1H-imidazol-1 yl)ethyl)tetradecanamide (NTETD) was synthesized from myristic acid and diethyleneamin...
Article
Plant biomaterials as inexpensive, nontoxic, biodegradable materials are found abundantly in nature.They contain heteroatoms and/or pi electrons that make them candidate for metals corrosion inhibitor. In recent years, numerous research works have been undertaken on plant biomaterials as metals corrosion inhibitor in different corrosive media. This...
Article
Corrosion defined as the deterioration of a material when it interacts with its environment is a global problem. Among the different strategies employed to combat corrosion, the use of coatings and corrosion inhibitors are the most popular. Coatings or corrosion inhibitors form a layer over the metallic substrate and protect it against corrosion.Po...
Article
Cyclodextrin-based functionalized Graphene Oxide (CD-GO), was synthesized utilizing cost-effective waste graphite as a source for production of graphene. The obtained novel material, CD-GO, was characterized and evaluated for corrosion inhibition of X60 carbon steels in solutions of HCl at room temperature. The inhibition efficacy of the CD-GO mate...
Article
A novel random copolymer 4, containing diallylmethylamine and N1,N1-diallyl-N1-methyl-N6,N6,N6-tripropylhexane-1,6-diammonium dibromide units in a 1:1 ratio (polymer 4) was synthesized via Butler’s cyclopolymerization technique. Characterization was accomplished by 1H NMR, elemental analysis, and Fourier-transform infrared spectroscopy (FTIR). Poly...
Article
Full-text available
The ability to analyze different electrochemical corrosion phenomena, in–situ, without requiring any form of electrode perturbation has strongly attracted the attention of corrosion researchers towards the application of electrochemical noise (EN) analysis method. With the ability to analyze stochastic and chaotic electrode potential and current fl...
Article
Full-text available
The corrosion inhibition efficiency of 2-Thiobarbituric acid (TBA) for metal substrate (API X60 steel) in 3.5% NaCl solution saturated with CO2 gas was probed using various techniques namely, LPR (linear polarization resistance), EIS (electrochemical impedance spectroscopy), and PDP (potentiodynamic polarization). The effects of TBA concentration (...
Article
Investigation into amitriptyline (AMI) as a corrosion inhibitor for different grades of pipeline steels (X80, J55 and mild steel) was undertaken under static conditions in 3.7% and 15% HCl solution and temperature ranging from 30 to 90 °C using electrochemical, gravimetric, and surface screening approaches. AMI is adjudged an effective steel corros...
Article
The inhibitive efficacy of environmental friendly pyrazine derivatives, 2,3-pyrazine dicarboxylic acid (Pyrazine C), pyrazine carboxamide (Pyrazine E) and 2-methoxy-3-(1-methylpropyl) pyrazine (Pyrazine H), on X60 steel were investigated in 15% hydrochloric acid (HCl), which simulate oil well acidizing conditions. The inhibitors were examined for t...
Article
A novel palmitic imidazoline compound, N-(2-(2-pentadecyl-4,5-dihydro-1H-imidazol-1-yl)ethyl)palmitamide (NIMP) has been successfully synthesized and characterized with Fourier transform spectroscopy (FTIR), Proton nuclear magnetic resonance (1H NMR), and Carbon-13 nuclear magnetic resonance (13C NMR). NIMP has been tested as corrosion inhibitor fo...
Article
A novel tetrapolymer (TP) consisting of carboxylate, sulphonate, phosphonate and sulfur dioxide based co-monomers was synthesized using Butler cyclopoymerization technique. The synthesized tetrapolymer was characterized using FTIR, ¹H-NMR, ¹³C NMR and elemental analysis. The performance of the tetrapolymer as a corrosion inhibitor for St37 carbon s...
Article
The possibility of utilizing dextran as a green corrosion inhibitor for steel in strong acid environment was explore using weight loss, electrochemical (electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM), potentiodynamic polarization (PDP), and linear polarization (LPR)) supported with surface analysis via scan...
Article
The study was aimed at establishing the possibility of using eco-friendly natural polymers to formulate corrosion inhibitors for sweet oil field environment. Against this background, the performance of two natural polymers; chitosan and carboxymethyl cellulose (CMC) as single component corrosion inhibitors in comparison with a commercial inhibitor...
Article
The work reports on the study carried out to comparatively assess the corrosion inhibition efficacy of crude ethanolic extracts of date palm leaves and seeds on X60 carbon steel corrosion in 15% HCl solution at 25–60 °C. The corrosion inhibition studies was carried out using weight loss and electrochemical (potentiodynamic polarization and linear p...
Article
Full-text available
Pyrazine is an important diazine with the nitrogen atoms occupying the 1,4-positions within an aromatic ring. Pyrazine and its derivatives find great importance in food and medicine courtesy of their chemical characteristics functionality, namely the chemistry of their nitrogen atoms. Based on the known ability of some nitrogen-based compounds to f...
Article
Full-text available
Ethanolic extracts of olive leaves (OLE) in the presence of TiCl4 solution was used to form OLE – Ti nanoparticles composite (OLE-Nano). The particle size of Ti nanoparticles in the composite was determined using particle sizer and the nanoparticles were characterized using UV–vis, FTIR, SEM/EDAX and XRD techniques. Results show that the particles...
Article
The efficacy of 1-butyl-1-methylpiperidinium tetrafluoroborate (BMPTFB) in retarding St37 steel corrosion in HCl environment has been examined using potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), dynamic-EIS (DEIS), scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR) techniques....
Article
Full-text available
The corrosion and corrosion inhibition of St37 steel in 0.1 M HCl solution by 1-ethyl-3-methylimidazolium tetrafluoroborate (EMITFB) and the effect of addition of KI on the inhibitive performance of EMITFB have been examined by electrochemical [electrochemical impedance spectroscopy, potentiodynamic polarization, and dynamic electrochemical impedan...
Article
Full-text available
Two isoxazolidine derivatives namely 5-(benzo[d][1,3]dioxol-5-ylmethyl)-2-tetradecyl isoxazolidine (BDMTI) and 5-(4-hydroxy-3-methoxybenzyl)-2-tetradecyl isoxazolidine (HMBTI) were synthesized and characterized using FTIR, C-NMR, H-NMR, and elemental analysis. The synthesized compounds were evaluated as corrosion inhibitors for API 5L X60 steel in...
Chapter
The vision of replacing conventional plastics which are derived from non-renewable sources with bioplastics of natural origin is essential to ecosystem preservation and a secure future. This century has witnessed an increase in the production and utilization of biocomposites and bionanocomposites. Various methods of preparation and characterization...