聚合物亲水基团对脱水过程中水凝胶中水的氢键结构变化的影响

IF 2.8 3区化学 Q3 CHEMISTRY, PHYSICAL Chemical Physics Letters Pub Date : 2024-09-23 DOI:10.1016/j.cplett.2024.141655

Hitoshi Sugiyama , Ken-ichi Katoh , Naoko Sekine , Yurina Sekine , Tomoaki Watanabe , Tomoko Ikeda-Fukazawa

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引用次数: 0

摘要

为了研究聚合物亲水性对水凝胶中水的氢键结构的影响，进行了差示扫描量热法和 X 射线衍射测量。结果表明，聚丙烯酰胺（PAA）水凝胶中的中间水量比聚-N,N'-二甲基丙烯酰胺（PDMAA）水凝胶中的中间水量少约 12%。此外，研究还发现 PAA 水凝胶中的结合水主要存在于聚合物束表面周围，而 PDMAA 水凝胶中的结合水则是聚合物链之间的交联剂。这些结果表明，聚合物的亲水性是水凝胶脱水和吸水的一个重要因素。

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Effects of hydrophilic groups of polymer on change in hydrogen-bonding structure of water in hydrogels during dehydration

To investigate the effects of polymer hydrophilicity on hydrogen-bonding structures of water in hydrogels, differential scanning calorimetry and X-ray diffraction measurements were performed. The results show that the amount of intermediate water in polyacrylamide (PAA) hydrogel is about 12 % smaller than that in poly-N,N’-dimethylacrylamide (PDMAA) hydrogel. Furthermore, it was found that the bound water in PAA hydrogel primarily exists around the surface of the polymer bundles, whereas that in PDMAA hydrogel acts as a crosslinker between polymer chains. These results suggest that the polymer hydrophilicity is an important factor for dehydration and water absorption in hydrogels.

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来源期刊

Chemical Physics Letters 化学-物理：原子、分子和化学物理

CiteScore

5.70

自引率

3.60%

发文量

798

审稿时长

33 days

期刊介绍： Chemical Physics Letters has an open access mirror journal, Chemical Physics Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Chemical Physics Letters publishes brief reports on molecules, interfaces, condensed phases, nanomaterials and nanostructures, polymers, biomolecular systems, and energy conversion and storage. Criteria for publication are quality, urgency and impact. Further, experimental results reported in the journal have direct relevance for theory, and theoretical developments or non-routine computations relate directly to experiment. Manuscripts must satisfy these criteria and should not be minor extensions of previous work.