Thermal and Mechanical Properties of Novel Composites of Methyl Silicone Polymer and Partially Ceramized Rice Bran
Thermal and Mechanical Properties of Novel Composites of Methyl Silicone Polymer and Partially Ceramized Rice Bran
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DOI：
10.1021/ie301922d
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发表时间：
2013-01
影响因子：
4.2
通讯作者：
M. M. Hassan-M.;Tatsuhiro Takahashi;K. Koyama
中科院分区：
文献类型：
--
作者：
M. M. Hassan-M.;Tatsuhiro Takahashi;K. Koyama
米糠（RB）富含碳和硅，是一种农业废物，在稻米生产国大量存在。本文采用Brabender型静态混合器，在110 °C下将RB粉末与熔融的甲基硅树脂（MSR）以不同比例共混，制备了MSR/RB复合材料。通过在260 °C和20 MPa压力下压缩成型和交联，由它们制成复合材料。通过热重分析、扫描电子显微镜和FT-IR以及通过测量压缩强度和吸湿膨胀来评估所产生的复合材料的热、机械和化学性质。结果表明，RB在交联过程中部分陶瓷化并分解为碳质材料。随着RB质量分数的增加，MSR/RB复合材料的吸水率和吸湿膨胀率增加，但压缩强度降低。当共混比为50/50时，复合材料的抗压强度最高，而当共混比为50/50时，复合材料的抗压强度最高。
Rice bran (RB), rich in carbon and silicone, is an agricultural waste that is abundantly available in rice producing countries. In this work, composites of a preceramic methyl silicone resin (MSR) and RB were prepared by blending powdered RB with a molten MSR at 110 °C at various ratios in a Brabender-type static mixer. Composites were made from them by compression molding and cross-linking at 260 °C under 20 MPa pressure. The thermal, mechanical, and chemical properties of the produced composites were assessed by thermogravimetric analysis, scanning electron microscopy, and FT-IR and by measuring compressive strength and hygroscopic expansion. It was found that RB was partially ceramized and decomposed to carbonaceous materials during cross-linking. The water absorption and hygroscopic expansion of the MSR/RB composites were increased but the compressive strength was decreased with an increase in the weight % of RB. The highest compressive strength was shown by the composites made from the 50/50 blends, ...