中文摘要：

利用同轴共纺技术制备出壳（聚甲基丙烯酸甲酯,PMMA）-芯（聚碳酸酯,PC）复合纳米纤维,再通过热压将壳层熔融后得到PC纳米纤维增强PMMA透光复合材料.分别在复合纳米纤维的壳层或芯层中添加不同含量的纳米二氧化钛（TiO2）粒子,观察纳米颗粒在复合纤维不同结构中的分布,并分析其含量及分布状态对透光复合材料的可见光透过率、紫外光透过率以及力学性能的影响.研究结果表明,分布在壳层的纳米TiO2可明显提高复合材料的紫外光屏蔽性,拉伸性能得到增强,但是透光率有所下降;分布在芯层的纳米TiO2对复合材料的透光率影响较小,而对拉伸性能的提高较引入壳层的效果更为显著.

英文摘要：

Polycarbonate （PC） nanofiber reinforced polymethyl methacrylate （PMMA） transparent compos- ites were developed by combination of co-axial eleetrospinning and hot-press technique. PMMA shell and PC core composite nanofibers were obtained through the coaxial-electrospinning and the nanofiber membranes were hot pressed into PC nanofiber reinforced PMMA transparent composites. TiO2 nano-particles of different contents were introduced into the shell （PMMA） and the core （PC） part of the composite nanofibers to shield ultraviolet transmittance of the resulting transparent composite. Distributions of the nano-particles in different parts of the core-shell structure of the composite nanofibers were observed, and the nano-particle influences of different contents and locations on visible light transmittance, ultraviolet radiation shielding and mechanical properties of the composites were analyzed. The results show that the ultraviolet radiation shielding capacity and tensile properties can be enhanced when the nano-partieles are located within the shell part, with a little drop in the visible light transmittance. The nano-partieles introduced into the core part induce significant improvement in mechanical performance without obvious impact on the visible light transmittance.