Acetylation of Castor Meal and Castor Proteins for Thermoplastic Applications

Hu, Chunyan; Nataraj, Divya; Reddy, Narendra

doi:10.1007/s10924-017-1034-1

Cited by 7 publications

(3 citation statements)

References 31 publications

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“…Further, this protein was dried for 24 h at 60°C. 7,11 These proteins were used for the preparation of the films. The procedure followed for the protein extraction is shown in Scheme 1.…”

Section: Methodsmentioning

confidence: 99%

“…to improve the performance properties and usability of proteins. 7,11,12 Crosslinking using chemical, physical, and/or enzymatic approaches are commonly employed to enhance the properties of protein and other biopolymer-based materials. When proteins react with specific molecules called crosslinkers, inter and intra molecular links are formed between the crosslinker and the protein functional groups.…”

Section: Pongamia Pinnata and Their Conversion Into Bioproducts For Food Packaging Applicationsmentioning

confidence: 99%

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Extraction and characterisation of bioactive proteins from Pongamia pinnata and their conversion into bioproducts for food packaging applications

Nataraj¹,

Guna²,

Battampara³

et al. 2021

Journal of Bioactive and Compatible Polymers

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In this research, proteins were obtained from Pongamia pinnata oil meal and subsequently converted into films and compression molded into various packaging products. Films with a maximum tensile strength of 1.9 MPa were obtained when 15% citric acid was used as the crosslinker. Minimum swelling of 120% was seen in 20% citric acid crosslinked film whereas the uncrosslinked films readily disintegrated in water. The protein films had excellent antioxidant properties with an IC50 value of 14.6 µg/ml compared to 26.9 µg/ml for the standard ascorbic acid. The pongamia protein-based bioproducts showed good activity against Bacillus cereus and Aspergillus niger. Unique properties, low cost, and large availability make pongamia proteins an ideal biopolymer for the development of green and sustainable materials and bioproducts.

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“…Further, this protein was dried for 24 h at 60°C. 7,11 These proteins were used for the preparation of the films. The procedure followed for the protein extraction is shown in Scheme 1.…”

Section: Methodsmentioning

confidence: 99%

Section: Pongamia Pinnata and Their Conversion Into Bioproducts For Food Packaging Applicationsmentioning

confidence: 99%

Extraction and characterisation of bioactive proteins from Pongamia pinnata and their conversion into bioproducts for food packaging applications

Nataraj¹,

Guna²,

Battampara³

et al. 2021

Journal of Bioactive and Compatible Polymers

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“…For instance, camelina meal was converted in biothermoplastics by grafting with various vinyl monomers 12 . Similarly, acetylation converted castor meal into thermoplastic meal that was suitable for developing compression molded bioproducts 13 . Such modifications enable thermal processing and conversion of the meal into biothermoplastics but add to the cost and also decrease the biodegradability.…”

Section: Introductionmentioning

confidence: 99%

Converting coconut meal into biothermoplastics for industrial applications

Reddy,

Guna,

et al. 2023

Biofuels Bioprod Bioref

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We present a simple approach to convert coconut (copra) oil cake into biothermoplastics with properties that are suitable for replacing synthetic polymer‐based plastics in current use. About 1.9 million tons of copra meal are generated ever year as coproducts and are available at $0.50–$0.60 per kilogram, making it a renewable, sustainable and low‐cost raw material. Despite containing proteins, carbohydrates and oil, there are limited non‐food applications of oil meals since most oil meals are typically non‐thermoplastic and hence difficult to be processed into bioproducts. In this study, we report the processing of copra meal into biothermoplastics in the presence of various plasticizers, heat and pressure. Compression molded films and bioproducts were developed from copra meal by heating at 130°C in the presence of glycerol, coconut oil or cashew shell oil as plasticizer. The films obtained had tensile strength of up to 4.4 MPa and were inherently stable in water. A one‐step crosslinking with citric acid was done to further improve the strength and stability of the films. With large availability at low cost, copra meal provides an opportunity to develop low‐cost, biodegradable, edible and innovative bioproducts that have the potential to replace the synthetic polymer‐based plastics in current use, particularly single‐use plastics.

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Influence of Alkali Treatment on the Physicochemical and Mechanical Properties of Starch Chitosan Films

Sakkara

Nataraj

Venkatesh³

et al. 2018

Starch Stärke

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Treating starch‐chitosan films with mild alkali makes them insoluble in water and common solvents, required for converting chitosan‐starch blends into value added products. Chitosan has good antibacterial properties but has poor resistance to aqueous conditions. Although chemical and physical modification helps to improve properties of chitosan and starch, most of these modifications are expensive. Previous studies have shown that alkali treatment can affect the structure and properties of chitosan and starch. Hence, the objective of present work is to study the effect of alkali treatment on the physicochemical and mechanical properties of chitosan starch blends. Various ratios of chitosan are blended with starch and made into films using the solution casting process. Films formed are immersed in a 0.5 N NaOH solution for 10 min which resulted in substantial transformation of the polymers, particularly chitosan. Mechanical properties, swelling, and sorption in water and physical characteristics of the pure and blend films are investigated. Chitosan starch blend film after alkali treatment in neutral and alkaline medium showed decrease in water sorption from 800 to 100% whereas strength of the chitosan starch blend films increased with increasing starch percentage. The 50/50 blend film had strength of 9 MPa and the alkali treatment helps in increasing the flexibility of the films by nearly 50%. The films are resistant to common solvents and even boiling water after the alkali treatment. The extent of changes in water sorption and mechanical properties were dependent on the proportion of starch/chitosan. Pure and blend films after alkali treatment could be considered for packaging, medical, and other applications.

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Acetylation of Castor Meal and Castor Proteins for Thermoplastic Applications

Cited by 7 publications

References 31 publications

Extraction and characterisation of bioactive proteins from Pongamia pinnata and their conversion into bioproducts for food packaging applications

Extraction and characterisation of bioactive proteins from Pongamia pinnata and their conversion into bioproducts for food packaging applications

Converting coconut meal into biothermoplastics for industrial applications

Influence of Alkali Treatment on the Physicochemical and Mechanical Properties of Starch Chitosan Films

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