| 壳聚糖-氧化石墨烯/热塑性聚氨酯复合材料的原位溶液聚合及性能 |
| |
| 引用本文： | 张钊滟,马帅,卢鑫,郑玉婴,林腾飞. 壳聚糖-氧化石墨烯/热塑性聚氨酯复合材料的原位溶液聚合及性能[J]. 复合材料学报, 2020, 37(11): 2726-2734. DOI: 10.13801/j.cnki.fhclxb.20200302.002 |
| |
| 作者姓名： | 张钊滟 马帅 卢鑫 郑玉婴 林腾飞 |
| |
| 作者单位： | 1.福州大学 材料科学与工程学院，福州 350108 |
| |
| 摘 要： | 为了制备高力学性能、阻隔性能和导热性能的热塑性聚氨酯(TPU)复合材料，采用改进的原位溶液聚合法，将壳聚糖改性的氧化石墨烯(CS-GO)与TPU预聚体接枝，再经扩链反应得到CS-GO/TPU复合材料。利用FTIR、XRD、FESEM对CS-GO进行表征，并采用万能试验机、氧气透过仪和导热仪对CS-GO/TPU复合材料的性能进行测试分析。结果表明:CS与GO之间存在氢键作用，CS-GO在TPU基体中的分散性优于GO。CS-GO的均匀分散有效阻隔了O2的渗透，提高了CS-GO/TPU复合材料的阻隔性能。CS-GO与TPU基体之间的相互作用有利于应力载荷的传递和导热网络的形成，与纯TPU相比，当CS-GO含量为1wt%时，CS-GO/TPU复合材料的拉伸强度和断裂伸长率分别提高了106.8%和111.2%，导热系数提高了1.55倍。
|
| 关 键 词： | 热塑性聚氨酯 壳聚糖 氧化石墨烯 原位聚合 力学性能 阻隔性能 导热性能 |
| 收稿时间： | 2019-12-10 |
In-situ solution polymerization and properties of chitosan-graphene oxide/thermoplastic polyurethane composites |
| |
| Affiliation: | 1.College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China2.Fujian Chenqi New Materials Technology Co. Ltd., Quanzhou 362200, China3.Fujian Xiangsu New Materials Key Laboratory, Quanzhou 362211, China |
| |
| Abstract: | An improved in-situ solution polymerization method was used in order to prepare the thermoplastic polyurethane (TPU) composite with high mechanical properties, barrier properties and thermal conductivity. Graphene oxide modified by chitosan (CS-GO) was grafted onto TPU prepolymer, then CS-GO/TPU composite was synthesized by chain extension reaction. The microstructure of CS-GO was characterized by FTIR, XRD and FESEM. The properties of CS-GO/TPU composites were tested by universal testing machine, oxygen transmission instrument and thermal conductivity meter. The results show that there is a hydrogen bond between CS and GO, and the dispersibility of CS-GO in the TPU matrix is better than GO. The enhancement of barrier property of CS-GO/TPU composites is due to the uniform dispersion of CS-GO which can effectively block the penetration of oxygen. The interaction between CS-GO and TPU matrix has positive effect on the transmission of stress load and the formation of a thermally conductive network. Compared with the pristine TPU, when mass fraction of the CS-GO is 1wt%, the tensile strength and elongation at break of CS-GO/TPU composites are increased by 106.8% and 111.2%, respectively; the thermal conductivity is 1.55 times higher than the pristine TPU. |
| |
| Keywords: | |
|
| 点击此处可从《复合材料学报》浏览原始摘要信息 |
|
点击此处可从《复合材料学报》下载免费的PDF全文 |
|
