Spectroscopic, thermal and sorption characterization of poly(vinyl alcohol)-borax hydrogels with incorporated turmeric

IF 2.8 4区 化学 Q3 POLYMER SCIENCE
Mathias B. Lawrence, Jaison Joseph
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Abstract

In this work, three sets of poly(vinyl alcohol) hydrogels, cross-linked using borax, with incorporated turmeric have been synthesized. Their water content, spectroscopic, thermal and sorption properties have been studied, as functions of borax and turmeric concentrations. The water content of the hydrogels decreases due to the presence of turmeric. The Fourier Transform Infra-red (FT-IR) and Raman spectroscopic measurements confirm the incorporation of turmeric in the matrices. Turmeric does not chemically bond with the polymer hydrogel network but is confined to the solvent phase within the pores. The presence and concentration of turmeric significantly affect the adsorption of water molecules onto the polymer backbone. Glass transition temperature and solvent uptake are affected by the concentration of borax and turmeric in the matrices. The sorption behaviour obeys the second-order kinetic model. The observed modifications in properties are caused by the structural re-arrangement of the polymer chains and the re-organization of borate cross-links due to the presence of turmeric.

Abstract Image

Abstract Image

加入姜黄的聚乙烯醇-硼砂水凝胶的光谱、热及吸附特性
在这项工作中,合成了三组聚乙烯醇水凝胶,用硼砂交联,加入姜黄。研究了硼砂和姜黄浓度对其含水量、光谱、热学和吸附性能的影响。由于姜黄的存在,水凝胶的含水量降低。傅里叶变换红外(FT-IR)和拉曼光谱测量证实了姜黄在基质中的掺入。姜黄不与聚合物水凝胶网络化学键合,而是局限于孔隙内的溶剂相。姜黄的存在和浓度显著影响水分子在聚合物主链上的吸附。硼砂和姜黄的浓度对玻璃化转变温度和溶剂吸收率有影响。吸附行为服从二级动力学模型。所观察到的性能变化是由聚合物链的结构重排和由于姜黄的存在而引起的硼酸盐交联的重新组织引起的。
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来源期刊
Journal of Polymer Research
Journal of Polymer Research 化学-高分子科学
CiteScore
4.70
自引率
7.10%
发文量
472
审稿时长
3.6 months
期刊介绍: Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.
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