Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7790598 | Carbohydrate Polymers | 2014 | 22 Pages |
Abstract
This paper reports a microwave assisted one pot facile synthesis of ester derivatives of agarose (Agr-GAEst) through chemical reaction of agarose (Agr) with gallic acid (GA), an organic acid found in many plants employing carbodiimide chemistry. Agr-GAEst was characterised by FT-IR, 13C 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-GAEst (obtained at an optimized molar ratio of 1: 0.5) formed good quality gel (tan δ â¼Â 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.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Jai Prakash Chaudhary, Dharmesh R. Chejara, Dipak Makwana, Kamalesh Prasad, Ramavatar Meena,