文献类型：期刊文献

中文题名：基于填料选择性分布的聚碳酸酯-纳米二氧化钛/聚丙烯光扩散材料的制备及性能

英文题名：Preparation and properties of polycarbonate-nano titanium dioxide/polypropylene light diffusing materials based on selective distribution of fillers

作者：Zhu, Huihao[1]; Xie, Linsheng[1]; Wang, Yu[1]; Ma, Yulu[1]; Zhang, Xu[1]; Li, Guo[1]

机构：[1] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2026

卷号：43

期号：5

起止页码：2851

外文期刊名：Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica

收录：EI(收录号：20262520955851)

语种：中文

外文关键词：Blending - Light sources - Morphology - Nucleation - Optical properties - Phase interfaces - TiO2 nanoparticles

摘要：Light-diffusing materials could convert point and line light sources into surface light sources, which are widely used in lighting, display, solar photovoltaic, light detectors and other fields. The performance of volumetric light-diffusing materials could be further modulated according to the characteristics and the distribution state of the scattering particles. In this paper, different blending methods were applied for polypropylene (PP), polycarbonate (PC) and modified nano titanium dioxide (nTiO2) during melt-blending process to achieve different distribution states of nTiO2. The migration behavior of TiO2 nanoparticles was analyzed considering kinetic and thermodynamic factors, and the effects of microscopic morphology on the mechanical and light diffusion properties of the composites were specifically investigated. The results showed that: nTiO2 was mainly distributed in the PP matrix and showed more significant heterogeneous nucleation in the composites when applying the one-step blending method. However, the distribution of nTiO2 in the PP matrix excessively exacerbated the scattering phenomenon, which resulted in a significant decrease in the light transmittance and comprehensive optical properties of the PC-nTiO2/PP materials obtained by one-step blending method. In (PC-nTiO2)/PP composites prepared by the stepwise blending method, nTiO2 was mainly distributed at the interface and within the PC dispersed phase. The composites showed balanced optical properties, meanwhile the distribution of nTiO2 in the PC phase might trigger multiple scattering, resulting in a larger scattering range. The (PC-nTiO2)/PP materials produced by the stepwise blending method showed better mechanical properties due to the rigidity of the PC-nTiO2 dispersed phase and strengthened interfacial interaction between the PP and PC phases raised by the bridging effect of nTiO2. The distribution state of nTiO2 also had an impact on the UV resistance of the composites. ? 2026 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.