Castor Oil-Based Polyurethane/Silica Nanocomposites: Morphology, Thermal and Mechanical Properties
Castor Oil-Based Polyurethane/Silica Nanocomposites: Morphology, Thermal and Mechanical Properties
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DOI：
10.1002/pc.24798
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发表时间：
2018-06-01
影响因子：
5.2
通讯作者：
Wei, Jun
中科院分区：
文献类型：
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作者：
Wang, Chengshuang;Xu, Feng;Wei, Jun
采用硅烷偶联剂（KH 560和KH 570）对纳米白炭黑进行表面改性。研究了纳米SiO2用量对蓖麻油基聚氨酯纳米复合材料的形态结构、力学性能和热性能的影响。扫描电子显微镜表明纳米二氧化硅在PU基体中的分散相对均匀。纳米SiO2对蓖麻油基聚氨酯基体具有显著的增强作用，复合材料的拉伸强度和杨氏模量均随纳米SiO2含量的增加而提高。当与纯PU相比，PU/二氧化硅纳米复合材料与12重量%的SiO2，KH 560-SiO2和KH 570-SiO2负载表现出222，230，和87%的拉伸强度的改善，和182，182，和88%的杨氏模量的增量，分别。此外，聚氨酯纳米复合材料的热稳定性略有改善与KH 570-SiO2的掺入。当SiO_2、KH_（560）-SiO_2和KH_（570）-SiO_2负载量分别为12%、13.1%和10.6%时，PU纳米复合材料在600 ℃下的残留量分别从3.4%增加到12.7%、13.1%和10.6%。(C)2018年塑料工程师协会
As a reinforcing filler, nano-silica was modified using silane coupling agents (KH560 and KH570). The effects of nano-silica loadings on the morphology, mechanical and thermal properties of castor oil-based PU nanocomposites were studied. Scanning electron microscopy demonstrated the relatively homogeneous dispersion of nano-silica in the PU matrix. After the addition of different nano-silica, a significant nano-silica reinforcement effect on castor oil-based PU matrix was found. The tensile strength and Young's modulus of the PU nanocomposites were increased with the increment of different nano-silica content. When compared with neat PU, PU/silica nanocomposites with 12 wt% SiO2, KH560-SiO2 and KH570-SiO2 loading exhibited 222, 230, and 87% improvement in tensile strength, and 182, 182, and 88% increment in Young's modulus, respectively. Furthermore, the thermal stability of PU nanocomposites was slightly improved with the incorporation of KH570-SiO2. At 12% SiO2, KH560-SiO2, and KH570-SiO2 loading, the residue of PU nanocomposites at 600 C were increased from 3.4 to 12.7, 13.1, and 10.6%, respectively. (C) 2018 Society of Plastics Engineers