The present work provides a comparative study on the interface and adhesion properties of surface modified single glass fibers embedded in an acrylate matrix. To facilitate a covalent bonding at the fiber-matrix interface, the fibers are functionalized with selected organosilanes that comprise either passive (unsaturated C=C bonds of methacrylate moieties) or photoactive functionalities (photocleavable bis(acyl)phosphane oxide groups). Immobilization of the functional silanes is carried out by a classic silanization reaction involving a condensation reaction across the surface hydroxyl groups of the inorganic glass fibers. The change of the physico-chemical properties of the fibers due to desizing and subsequent surface modification is monitored by X-ray photoelectron spectroscopy and zeta potential measurements. In addition, scanning electron microscopy is used to follow the changes in surface morphology. After the modification step, the desized and modified single fibers are embedded in a photocurable acrylate resin formulation. By performing single fiber pull-out tests, maximum pull-out force, friction strength and apparent interfacial shear strength are determined as a function of the coupled silanes. The results reveal that the attached organosilanes lead to a significant increase in adhesion strength, whilst the performance of the photo-cleavable organosilane is superior to the passive methacryl-functional derivative.

本工作对嵌入丙烯酸酯基体中的表面改性单玻璃纤维的界面和粘合性能进行了比较研究。为了促进在纤维-基质界面处的共价键合，用选定的有机硅烷对纤维进行功能化，所述有机硅烷包含被动性（甲基丙烯酸酯部分的不饱和C = C键）或光敏性官能团（可光裂解的双（酰基）氧化膦基团）。官能硅烷的固定化是通过经典的硅烷化反应进行的，该硅烷化反应包括在无机玻璃纤维表面羟基上的缩合反应。通过退浆和随后的表面改性，纤维的理化性质的变化通过X射线光电子能谱和ζ电势测量来监测。此外，扫描电子显微镜用于追踪表面形态的变化。在改性步骤之后，将经变性和改性的单纤维包埋在可光固化的丙烯酸酯树脂制剂中。通过进行单纤维拉出试验，最大拉出力，摩擦强度和表观界面剪切强度被确定为偶联硅烷的函数。结果表明，附着的有机硅烷导致粘合强度显着提高，而光可裂解的有机硅烷的性能优于被动甲基丙烯酸官能衍生物。根据偶联的硅烷确定最大拉出力，摩擦强度和表观界面剪切强度。结果表明，附着的有机硅烷导致粘合强度显着提高，而光可裂解的有机硅烷的性能优于被动甲基丙烯酸官能衍生物。根据偶联的硅烷确定最大拉出力，摩擦强度和表观界面剪切强度。结果表明，附着的有机硅烷导致粘合强度显着提高，而光可裂解的有机硅烷的性能优于被动甲基丙烯酸官能衍生物。