A novel pH and temperature-sensitive maleate poly(vinyl alcohol)-graft-isopropylacrylamide/natural rubber blend: preparation and properties

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• 作者：Wattana Sukhlaaied ; Sa-Ad Riyajan
• 关键词：Smart polymer hydrogel ; Natural rubber ; PNIPAM ; Sensitivity ; Latex ; Biodegradation
• 刊名：Polymer Bulletin
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：74
• 期：3
• 页码：803-821
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Polymer Sciences; Soft and Granular Matter, Complex Fluids and Microfluidics; Characterization and Evaluation of Materials; Physical Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1436-2449
• 卷排序：74

文摘

A novel pH–temperature-sensitive elastomer was made from maleate poly(vinyl alcohol)-graft-isopropylacrylamide (PVAM-graft-PNIPAM), namely PVNI and deproteinized natural rubber (DPNR) in a water-based system. The swelling ratio in water of PVNI/DPNR hydrogel enhanced as a function of PVNI portion in hydrogel due to increasing of hydrophilic group in the hydrogel. Surprisingly, the percentage of swelling in water of PVNI/DPNR hydrogel 7:3 is 24 times based on pristine DPNR. In addition, the highest tensile strength of PVNI/DPNR hydrogel was found at 7:3 PVNI/DPNR. The highest elongation at break of PVNI/DPNR hydrogel was improved after the addition of DPNR. Moreover, the resulting smart hydrogel showed a good pH–temperature sensitivity. In addition, it yielded a good polymer membrane for encapsulating capsaicin (CSC) in different media. After its use, it also easily decomposed in the natural environment.