脱气、中和和脱水对cmc -g聚丙烯酸-共甲基丙烯酸水凝胶的影响

Q2 Materials Science

Polymers from Renewable Resources Pub Date : 2023-06-08 DOI:10.1177/20412479231182698

Mina Pourkhatoun, M. Kalantari, A. Kamyabi, A. Moradi

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引用次数: 0

摘要

以过硫酸铵（APS）为引发剂，N，N′-亚甲基双丙烯酰胺（MBA）为交联剂，将丙烯酸（AA）和甲基丙烯酸（MAA）自由基聚合到羧甲基纤维素（CMC）骨架上，制备了CMC-g-poly（丙烯酸-甲基丙烯酸）水凝胶。为了研究水凝胶处理前后对溶胀平衡、凝胶分数和重量损失的影响，设计了3组5个样品的实验，并研究了脱气（使用N2）、用1M NaOH中和以及用丙酮和乙醇脱水两个阶段的影响。结果证实了所有治疗后阶段的积极作用。最终数据表明，以N2为反应气氛、一个中和阶段和两个脱水阶段的样品（v）表现出167 g/g的最大溶胀、61.4%的最大凝胶分数和38.6%的最大重量损失。这些结果表明，这些处理表现出具有良好溶胀比的水凝胶，这在智能递送系统、医疗保健、，以及生物医学应用。通过红外光谱、扫描电镜和热重分析对优化后的样品进行了表征。

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The effects of degassing, neutralization, and dewatering on the CMC-g-poly (acrylic acid-co-methacrylic acid) hydrogel

CMC-g-poly (acrylic acid-co-methacrylic acid) hydrogel was prepared by free radical polymerization of acrylic acid (AA) and methacrylic acid (MAA) onto carboxymethyl cellulose (CMC) backbone using ammonium persulfate (APS) as an initiator and N, N′-methylene bisacrylamide (MBA) as a crosslinker. For investigating the effects of before and after treatments of the hydrogel on the swelling equilibrium, gel fraction, and weight loss, 3 sets of experiments with 5 samples were designed and the effect of degassing (using N2), neutralization with NaOH 1 M, and two stages of dewatering with acetone and ethanol was studied. The results confirmed the positive effects of all the after-treatment stages. The final data indicate that sample (v) with N2 as reaction atmosphere, one neutralization stage, and two dewatering stages exhibit a maximum swelling of 167 g/g, maximum gel fraction of 61.4%, and also maximum weight loss of 38.6%. These outcomes show that these treatments exhibit hydrogel with a good swelling ratio which is desirable in smart delivery systems, healthcare, and biomedical applications. The optimized sample was characterized by FT-IR, SEM, and TGA too.

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来源期刊

Polymers from Renewable Resources Materials Science-Polymers and Plastics

CiteScore

3.50

自引率

0.00%

发文量

期刊介绍： Polymers from Renewable Resources, launched in 2010, publishes leading peer reviewed research that is focused on the development of renewable polymers and their application in the production of industrial, consumer, and medical products. The progressive decline of fossil resources, together with the ongoing increases in oil prices, has initiated an increase in the search for alternatives based on renewable resources for the production of energy. The prevalence of petroleum and carbon based chemistry for the production of organic chemical goods has generated a variety of initiatives aimed at replacing fossil sources with renewable counterparts. In particular, major efforts are being conducted in polymer science and technology to prepare macromolecular materials based on renewable resources. Also gaining momentum is the utilisation of vegetable biomass either by the separation of its components and their development or after suitable chemical modification. This journal is a valuable addition to academic, research and industrial libraries, research institutions dealing with the use of natural resources and materials science and industrial laboratories concerned with polymer science.