Journal
CARBOHYDRATE POLYMERS
Volume 114, Issue -, Pages 306-311Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.08.024
Keywords
Agarose; Ester derivatives; Thixotropy; Self-healing; Stretchable material
Categories
Funding
- DST [SB/EMEQ-052/2013]
- CSIR, New Delhi, India [CSC0130]
Ask authors/readers for more resources
This paper reports a microwave assisted one pot facile synthesis of ester derivatives of agarose (Agr-GA(Est)) through chemical reaction of agarose (Agr) with gallic acid (GA), an organic acid found in many plants employing carbodiimide chemistry. Agr-GA(Est) was characterised by FT-IR, C-13 NMR spectroscopy, thermogravimetric analysis (TGA), DMA measurements, scanning electron microscopy (SEM), UV-vis spectrophotometry and rheometry. The native agarose was insoluble in ethylene glycol, but Agr-GA(Est) (obtained at an optimized molar ratio of 1: 0.5) formed good quality gel (tan delta similar to 0.1) at 4% (w/v) concentration. The gel thus obtained exhibited substantial degree of thixotropy (hysteresis loop area = 38.73%), rapid self-healing ability (12 min) upon complete cleavage of the gel and excellent stretching ability (>20 times of its original length). These types of multifunctional gels would find applications in food and personal health care industries. (C) 2014 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available