Issue 61, 2014

Thermomechanical relaxation and different water states in cottonseed protein derived bioplastics

Abstract

Thermomechanical relaxation events and different water states in cottonseed protein bioplastics are presented whilst investigating the effects of aldehyde cross-linking agents. Thermomechanical relaxation of cottonseed protein bioplastics associated with protein denaturation, moisture absorption and broad glass transitions (Tg) were observed from DSC and DMA measurements. It was shown that variation of the aldehyde influences the storage modulus at very low temperature (below Tg). From measurements of the water fusion point, enthalpy, vaporisation, and weight loss, three water states in the water-absorbed bioplastics are suggested; namely strongly-bound-to-polymer, weakly-bound-to-polymer and bulk-like water. The water content and unreacted cross-linking agents are influential factors in controlling formation of the different water states, whilst the selection of different aldehydes was found to be negligible. These results could be valuable for adjusting the thermomechanical relaxations of protein based bioplastics, and tailoring their properties in wet environments.

Graphical abstract: Thermomechanical relaxation and different water states in cottonseed protein derived bioplastics

Supplementary files

Article information

Article type
Paper
Submitted
28 Feb 2014
Accepted
16 Jul 2014
First published
17 Jul 2014

RSC Adv., 2014,4, 32320-32326

Thermomechanical relaxation and different water states in cottonseed protein derived bioplastics

H.-B. Yue, J. P. Fernandez-Blazquez, P. S. Shuttleworth, Y.-D. Cui and G. Ellis, RSC Adv., 2014, 4, 32320 DOI: 10.1039/C4RA01794C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements