材料科学
复合材料
韧性
硬度
制作
复合数
透射率
透明度(行为)
纳米颗粒
纳米技术
医学
替代医学
光电子学
病理
政治学
法学
作者
Bo Cao,Peng Wu,Wenxiang Zhang,Shumei Liu,Jianqing Zhao
出处
期刊:Molecules
[MDPI AG]
日期:2022-12-30
卷期号:28 (1): 304-304
被引量:4
标识
DOI:10.3390/molecules28010304
摘要
The high-hardness and transparent PMMA-based composites play a significant role in modern optical devices. However, a well-known paradox is that conventional PMMA-based composites with high loadings of nanoparticles usually possess high surface hardness at the cost of poor transparency and toughness due to the aggregation of nanoparticles. In this work, ideal optical materials (SiO2/PMMA composites) with high transparency and high surface hardness are successfully fabricated through the introduction of the flow modifier Si-DPF by conventional melt blending. Si-DPF with low surface energy and high transparency, which is located at the SiO2/PMMA interface, and nano-SiO2 particles are homogeneously dispersed in the PMMA matrix. As an example, the sample SiO2/PMMA/Si-DPF (30/65/5) shows outstanding transparency (>87.2% transmittance), high surface hardness (462.2 MPa), and notched impact strength (1.18 kJ/m2). Moreover, SiO2/PMMA/Si-DPF (30/65/5) also presents a low torque value of composite melt (21.7 N⋅m). This work paves a new possibility for the industrial preparation of polymer-based composites with excellent transparency, surface hardness, processability, and toughness.
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