Kafirin-derived films for sustainable development by amidation and esterification

Mahajan, Umesh R.; Mhaske, S. T.

doi:10.1007/s00289-019-02876-y

Cited by 2 publications

(2 citation statements)

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“…Notably, however, there is no agreement as to its glass transition temperature (T g ), with values ranging from 40°C to 233.8°C having been reported (Table 1). The latter value was found by two independent research teams (Mahajan & Mhaske, 2020;Wang et al, 2009). A similar wide range of T g has been reported for films made from kafirin alone (i.e., without inclusion of plasticizers), −2.5°C to approximately 150°C.…”

Section: Thermal Propertiessupporting

confidence: 81%

“…The main treatment methods studied are: thermal treatment, which results in chemical crosslinking (as discussed in Section 3.2); chemical cross‐linking using aldehydes, tannins and oxidizing agents; enzymatic cross‐linking using transglutaminase and breakage of disulfide crosslinks using reducing agents. More recent research has investigated the effects of amidation and esterification on the mechanical properties of compression molded kafirin films (Mahajan & Mhaske, 2020). The films made from amidated kafirin had substantially lower water vapor permeability and somewhat greater tensile strength than the films made from untreated kafirin.…”

Section: Properties Of Kafirin Bioplastic Materialsmentioning

confidence: 99%

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Do kafirin bioplastic materials have unique functional characteristics?

Taylor

2023

Cereal Chem

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Background and Objectives: There is considerable interest in kafirin, sorghum prolamin, as a bioplastic material because it apparently produces bioplastics with superior functional properties. This review evaluates the evidence, focussing on research directly comparing the properties of kafirin bioplastics (films and elastomers) with those from zein and gluten.Findings: Kafirin and zein are more hydrophobic than gluten but there is little difference in hydrophobicity between them. Kafirin and zein films have better moisture barrier properties than gluten films. Films made from total kafirin (α-, β-, and γ-kafirins) are stronger and take up less moisture than films from commercial zein (essentially α-zein). However, total kafirin-and total zein films have similar moisture uptake. Also, there is little difference in oxygen barrier properties between total kafirin-and commercial zein films. Total kafirin elastomers have better elastic recovery than commercial-and total zein elastomers and similar elastic recovery to gluten. Conclusions:The better functional properties of kafirin bioplastics compared to commercial zein bioplastics seems to be largely due to the greater disulfide bonded polymerization of kafirin polypeptides, involving the cysteine-rich βand γ-kafirin classes. Significance and Novelty: This work should stimulate research into disulfidebonded polymerization of prolamins to improve their bioplastic functionality.

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Section: Thermal Propertiessupporting

confidence: 81%

Section: Properties Of Kafirin Bioplastic Materialsmentioning

confidence: 99%