树脂导光水泥基材料的界面特性及模拟服役环境中劣化机理研究

Resin light conductive cementitious materials (RLCCM) have transmitting contour revealing and lighting energy saving effect. In this project, for two questions on interface and degradation of RLCCM, interface characterization of RLCCM and its deterioration mechanism in simulated service environment were studied. Interface mechanical and shrinkage properties of interface bonding zone between transparent resin and cement matrix of RLCCM were investigated by strength test, dry shrinkage test and ANSYS simulation. Interface micro morphology, interface chemical reaction, surface morphology structure, interface microhardness of interface bonding zone of RLCCM were investigated by ESEM, XPS and FTIR, AFM tapping mode, microhardness tester，respectively. Interface microstructure and interface modification effect of coupling agent were analyzed. The influence law of interface bonding status on transparent property was gained. Interface mechanism was revealed. Meanwhile, interface mechanical property and interface microstructure of RLCCM in simulated service environment, such as ultraviolet light, acid rain and coupling effect, were studied with environment simulation devices. The corrosion resistance of RLCCM was studied in simulated service environment by testing light transmission and mechanical properties of them. The influence of interface degradation on transparent property, and the relationship between degradation rule and microstructure evolution of RLCCM was clarified. Degradation mechanism was also revealed. The study aimed to explore interface characterization of RLCCM and its deterioration mechanism in simulatied service environment. Through the above research, it established the theoretical foundation of RLCCM.

树脂导光水泥基材料（RLCCM）具有透光显影和采光节能作用。本项目针对RLCCM的界面与劣化两个问题，研究RLCCM的界面特性及其在模拟服役环境中的劣化机理。采用强度和干缩试验及ANSYS模拟研究RLCCM的界面力学性能和界面收缩性能，采用ESEM、XPS和FTIR、AFM轻敲模式及显微硬度计研究RLCCM的界面微观形貌、界面化学反应、表面形貌结构和界面显微硬度，分析其界面微观结构和偶联剂界面改性作用，弄清界面结合状态对其透光性能的影响规律，揭示其界面作用机理；利用环境模拟装置，研究紫外线、酸雨及其耦合对RLCCM的界面力学性能和界面微观结构的影响，通过测试RLCCM透光性能和力学性能的变化，研究模拟服役环境中RLCCM的耐腐蚀性能，弄清界面劣化对其透光性能的影响以及劣化规律与微观结构演变的关系，揭示其劣化机理。旨在探明RLCCM的界面特性及其在模拟服役环境中的劣化机理，奠定其理论基础。

本项目以树脂导光水泥基材料为载体，重点研究树脂导光水泥基材料的界面特性及其在模拟服役环境中的劣化机理，揭示界面作用机理，建立界面腐蚀演化模型，解决界面和劣化两大理论问题；建立树脂导光水泥制品的预制先植法，解决透光树脂植入关键技术问题。引入梯度功能设计思路实现树脂导光水泥基材料的功能/结构一体化设计；综合表征树脂导光水泥基材料的力学性能（抗压强度≥70MPa，抗弯强度≥10MPa）、透光性能（透光率15%~24%）、热工性能（热膨胀系数15~20×10-6 /℃，导热系数0.75~0.80 W/m•K）、疏水自洁性能（疏水角104°~115°）和耐老化性能（抗硫酸盐侵蚀性能、耐黄变性能、抗酸雨-紫外线耦合作用能力较好）等物化性能；采用宏观测试手段结合计算机仿真模拟技术研究界面结合区的界面力学性能和界面收缩性能；运用现代测试技术从微细观尺度研究界面结合区的界面微观形貌、界面化学反应、表面形貌结构和界面显微硬度等界面特性，揭示其界面作用机理；利用环境模拟装置研究紫外线、酸雨及其耦合作用下界面结合区的界面力学性能、界面微观结构等腐蚀特性，建立其界面腐蚀演化模型；采用软件计算分析结合现场考察方法评价树脂导光水泥基材料的采光节能、透光显影和疏水清洁效果，构建其效果评价体系；开发环境友好树脂导光水泥制品，建立制备和施工工艺，编制生产和施工技术规范。本项目极大提升了树脂导光水泥基材料的技术水平，为水泥基功能材料提供了重要材料支持。