Horvath Marius, Sinkó Katalin
Institute of Chemistry, Eötvös Loránd University, 1053 Budapest, Hungary.
Gels. 2025 Jul 5;11(7):522. doi: 10.3390/gels11070522.
The aim of the present research was to synthesize protective composite layers from biodegradable cellulose and biocompatible, sol-gel-derived silica cryogel. An important task in the present work was to achieve good applicability on distinct (smooth and rough) surfaces of various materials (from metallic to ceramic). The aim was to utilize the composite layers as thermal and electric insulation coating. The investigation put some effort into the enhancement of mechanical strength and the elasticity of the thin layer as well as a reduction in its water solubility. The removal of the alkali content leads successfully to a significant reduction in water solubility (97 wt% → 1-3 wt%). Adhesion properties were measured using a specialized measurement technique developed in our laboratory. Treatments of the substrate surface, such as alkaline or acidic etching (i.e., NaCO, HF, water glass), mechanical roughening, or the application of a thin alkali-containing primer layer, strongly increase adhesion. SEM analyses revealed the interactions between the matrix and the reinforcement phase and their morphology.
本研究的目的是由可生物降解的纤维素和生物相容性的、溶胶-凝胶衍生的二氧化硅低温凝胶合成保护性复合层。本工作中的一项重要任务是要在各种材料（从金属到陶瓷）的不同（光滑和粗糙）表面上实现良好的适用性。目的是将复合层用作热绝缘和电绝缘涂层。该研究致力于提高薄层的机械强度和弹性，并降低其水溶性。去除碱含量成功地使水溶性显著降低（从97 wt%降至1-3 wt%）。使用我们实验室开发的专门测量技术测量附着力。对基材表面进行处理，如碱性或酸性蚀刻（即碳酸钠、氢氟酸、水玻璃）、机械粗糙化或施加含碱的薄底漆层，会大大提高附着力。扫描电子显微镜分析揭示了基体与增强相之间的相互作用及其形态。
