Abstract

Recently, new cleaning products based on polymer–surfactant platforms have captured the attention of the industry, thanks to their good mechanical strength and excellent solubility. In this study, surfactant–polyvinyl alcohol hydrogels using glycerin as a cross-linking agent were prepared to investigate which factors affect the mechanical properties of the dried films. The mixed gels were prepared and dried to approximately 15% moisture content through heat conduction using an aluminum alloy plate. The mechanical analysis was performed using a Material Testing System (MTS). Furthermore, X-ray diffraction (XRD) was used to obtain phase structure of the samples, and scanning electron microscopy (SEM) was used for microstructure analysis. The data from this study suggest that crystallinity of PVA affects the mechanical properties of the surfactant–PVA hydrogel. The liquid crystallinity is the main influencing factor of hydrogel flexibility and can be modified via surfactant compounding. Furthermore, a novel hypothesis for the adsorption of surfactant is also proposed, with the purpose of probing the interaction between polyvinyl alcohol and surfactant from a molecular perspective.

摘要

最近，基于聚合物-表面活性剂平台的新型清洁产品因其良好的机械强度和出色的溶解性而引起了业界的关注。在这项研究中，使用甘油作为交联剂制备了表面活性剂-聚乙烯醇水凝胶，以研究哪些因素会影响干膜的机械性能。制备混合凝胶并使用铝合金板通过热传导将其干燥至含水量约15%。使用材料测试系统 (MTS) 进行机械分析。此外，使用X射线衍射（XRD）获得样品的相结构，并使用扫描电子显微镜（SEM）进行微观结构分析。该研究的数据表明，PVA 的结晶度会影响表面活性剂-PVA 水凝胶的机械性能。液晶度是影响水凝胶柔韧性的主要因素，可以通过表面活性剂的复配进行改性。此外，还提出了表面活性剂吸附的新假设，目的是从分子角度探讨聚乙烯醇与表面活性剂之间的相互作用。