Agarose based multifunctional materials: Evaluation of thixotropy, self-healability and stretchability

作者：Chaudhary Jai Prakash; Chejara Dharmesh R; Makwana Dipak; Prasad Kamalesh; Meena Ramavatar^*

来源：Carbohydrate Polymers, 2014, 114: 306-311.

DOI：10.1016/j.carbpol.2014.08.024

• Agarose
• Ester derivatives
• Thixotropy
• Self-healing
• Stretchable material

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.

• 出版日期2014-12-19
• 单位海洋化工研究院有限公司