The stability of phenol-urea-formaldehyde (PUF) binder and 3-aminopropylsilane (APS) on composite silicate materials (fibers and wafers) was studied with surface sensitive techniques (X-ray photoelectron spectroscopy (XPS) and streaming potential) through a wide range of humidity and temperature and ab initio modelling complemented the results. Behavior was compared for wettability properties, determined by vapor adsorption and contact angle analysis. APS and PUF, deposited on the silicate surfaces, decrease surface energy and wettability but water adsorption remains high, facilitating hydrolytic decomposition of the composite material. Deposited APS is unstable at T>50°C and 75% RH, while PUF is less sensitive to high humidity and temperature. Molecular dynamics confirmed APS sensitivity to humidity. Water adsorption and surface energy decrease, and material stability increases when a hydrophobization agent is applied to APS/PUF treated surfaces. The direct correlation between wettability and stability of PUF/APS/fiber composites can contribute in designing new materials with controlled hydrophobic properties.

利用表面敏感技术（X射线光电子能谱（XPS）和流动电位），广泛研究了酚-脲-甲醛（PUF）粘合剂和3-氨基丙基硅烷（APS）在复合硅酸盐材料（纤维和晶片）上的稳定性。湿度和温度范围以及从头开始建模对结果进行了补充。比较通过蒸汽吸附和接触角分析确定的润湿性的行为。沉积在硅酸盐表面上的APS和PUF降低了表面能和润湿性，但吸水率仍然很高，有利于复合材料的水解分解。沉积的APS在T> 50°C和75％RH时不稳定，而PUF对高湿度和高温不太敏感。分子动力学证实了APS对湿度的敏感性。当将疏水化剂应用于APS / PUF处理的表面时，吸水率和表面能降低，材料稳定性增强。PUF / APS /纤维复合材料的润湿性和稳定性之间的直接关系可以有助于设计具有可控疏水特性的新材料。