Preparation and Thermoplastic Processing of Modified Plant Proteins

Bräuer, Silke; Meister, Frank; Gottlöber, Ralf-Peter; Nechwatal, Axel

doi:10.1002/mame.200600364

Cited by 42 publications

(36 citation statements)

References 30 publications

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“…(Arcan & Yemenicioglu, 2010;Damodaran, 1996). Moreover, the good film forming properties of plant proteins make them potential candidate materials for developing edible films and plastic alternative biodegradable packaging materials (Bräuer, Meister, Gottlöber, & Nechwatal, 2007).…”

Section: Introductionmentioning

confidence: 99%

Bioactive, functional and edible film-forming properties of isolated hazelnut (Corylus avellana L.) meal proteins

et al. 2014

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a b s t r a c tThis study aimed characterization of bioactive, functional and edible film making properties of isolated proteins from untreated (HPI), hot extracted (HPI-H), acetone washed (HPI-AW), and acetone washed and hot extracted (HPC-AW-H) hazelnut meals. The most bioactive protein extract was HPC-AW-H, followed by HPI-AW, HPI-H and HPI, based on antioxidant activity (TEAC and ORAC: 158 e461 mmol Trolox/kg), iron chelation (60.7e126.7 mmol EDTA/kg), angiotensin-converting enzyme inhibition (IC 50 : 0.57e1.0 mg/mL) and antiproliferative activity on colon cancer cells (IC 50 : 3.0e4.6 mg/ ml). Protein contents of HPI, HPI-H and HPI-AW (93.3e94.5%) were higher than that of HPC-AW-H (86.0%), but HPC-AW-H showed the best pH-solubility profile. The extracts showed good oil absorption (7.4e9.4 g/g) and foaming, but limited water holding and gelling capacities, and emulsion stability. The protein extracts gave transparent, yellowish to brownish and reddish colored and water soluble edible films. The HPI gave the lightest colored films with acceptable mechanical properties (elongation up to 144% and tensile strength up to 4.9 MPa). 1-D and 2-D electrophoresis clearly showed the molecular and isoelectric profiles of hazelnut proteins. The overall results of this study showed that the bioactive, solubility and gelation properties of hazelnut proteins could be improved by simple processes like acetone washing and/or heat treatment. The hazelnut proteins are valuable as multipurpose food ingredients.

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Section: Introductionmentioning

confidence: 99%

Bioactive, functional and edible film-forming properties of isolated hazelnut (Corylus avellana L.) meal proteins

et al. 2014

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“…As a protein, collagen can be regarded as a biopolymer. It is known from other biopolymers, such as plant proteins, starch, or cellulose, that it is possible to process them in analogy to synthetic polymers by thermoplastic techniques, such as extrusion or injection molding, in order to obtain products of different forms (e.g., cast or molded pieces, sheets, films, or coatings) 4–14…”

Section: Introductionmentioning

confidence: 99%

Preparation, processing, and rheology of thermoplastic collagen

Klüver

Meyer

2012

J of Applied Polymer Sci

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This article describes a technology for the thermoplastic treatment of collagen. Based on limed, untanned cattle pelts a fine powder, termed Thermoplastic Collagen (TC) is produced, which can be processed using conventional thermoplastic techniques. Central step in the production of TC is the partial denaturation of collagen, which was achieved by four different methods. Extrusion of TC at temperatures below 100°C is possible after addition of 30–60% water as plasticizer. In order to maintain permanent flexibility and reduce tackiness, glycerol and stearic acid are used as additives. Shear and elongational viscosities of TC‐water‐mixtures decrease with the shear rate which is consistent with the behavior of thermoplastic materials. The power law can be applied, yielding power law indices of 0.15–0.35. The viscosities are more distinctly influenced by raw material and water content than by temperature or glycerol content. Material properties of the extrudates are described and compared with the starting material. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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“…Palmitic acid chloride or alkenyl‐substituted succinic anhydride was used as an acylation reagent to ameliorate two main problems of protein‐based materials: the inapplicability for thermoplastic shaping and the low water resistance . The plant proteins studied were wheat gluten, soy protein, corn zein, and pea protein.…”

Section: Graftingmentioning

confidence: 99%

Treatments of protein for biopolymer production in view of processability and physical properties: A review

Zhang

et al. 2016

J of Applied Polymer Sci

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The development of bio-based polymers from proteins has gained attention for their large availability and renewable and biodegradable nature. However, protein-based plastics have limited commercial applications because of several drawbacks, such as poor processability, brittleness, moisture sensitivity, and inferior mechanical and thermal properties. Extensive studies have been conducted to solve or ameliorate these issues by pretreatment or modification of proteins or protein-derived biopolymers before or during wet processing or dry processing at elevated temperatures. This review provides an overview of research efforts conducted in the area of physical and chemical treatment of proteins to achieve better processability, mechanical properties, and other physical performance based on a literature review in this subject. INTRODUCTIONBiopolymers derived from agricultural resources such as wool, cotton, leather, and silk have been extensively used by humans for a long time. Industrial use of agricultural commodities for fuels and consumer products began in the 1920s. They were soon replaced by petroleum-based chemicals after World War II because these synthetic polymers were cheaper, more durable, and more versatile. Advances in petroleum-based fuels and polymers have benefited mankind in numerous ways. However, sustainability of their production and use has become a societal concern. Besides, petroleum resources are finite, and their prices are likely to continue to rise in the future. The disposal of petroleum-based plastic has also been causing environmental concerns. 1 Since the early 1990s, the use of renewable biopolymers as a substitute for nonbiodegradable petrochemical-based polymers has again attracted considerable attention because of their environmental benefits such as renewability and biodegradability. Nowadays, natural polymers can even be tailored to meet specific needs.Protein is one of three main categories of renewable biopolymers aside from polysaccharides and polynucleotides that are derived from plant or animal resources. Plant proteins that can be used for bio-based plastics include soy protein, corn zein, wheat protein, cottonseed protein, and sunflower protein. Animal proteins such as blood meal, gelatin and collagen, keratin and feather quills, egg protein, whey protein, and meat and bone meal can also be used as a feedstock for such bio-based polymers. 2 Despite their environmental friendliness, proteinbased biopolymers have many shortcomings like lower mechanical properties when compared to petroleum-based polymers. 3 Due to the hydrogen bonds between C@O and NH groups, protein-based polymers have poor processability and exhibit high sensitivity to moisture. As a result, the protein-based polymers are very difficult to process without plasticizers or pretreatment. To date, overcoming these shortcomings of proteinbased bioplastics has proven difficult. Numerous methods have been investigated, including physical treatment, denaturation of the original protein in crystalline form, cleava...

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Preparation and Thermoplastic Processing of Modified Plant Proteins

Cited by 42 publications

References 30 publications

Bioactive, functional and edible film-forming properties of isolated hazelnut (Corylus avellana L.) meal proteins

Bioactive, functional and edible film-forming properties of isolated hazelnut (Corylus avellana L.) meal proteins

Preparation, processing, and rheology of thermoplastic collagen

Treatments of protein for biopolymer production in view of processability and physical properties: A review

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