氨基化石墨烯改性水性聚氨酯的合成及性能
发布时间：2018-10-09 10:03
【摘要】：用3-氨丙基三甲氧基硅氧烷(APTMS)插层改性氧化石墨烯(GO),得到氨基化石墨烯(APTMS-GO)。通过FTIR、XRD、Raman、TG、TEM、XPS表征了APTMS-GO的结构和形态。将APTMS-GO与带有异氰酸根的聚氨酯预聚物以原位聚合的方式聚合,制得了含APTMS-GO质量分数(以聚氨酯合成原料的总质量计,下同)为0、0.06%、0.11%、0.16%、0.22%、0.33%和0.55%的APTMS-GO/WPU纳米复合材料,并测试了其拉伸性能、热性能和疏水性的变化;利用FESEM和TEM观察了截面中纳米填充物的分散情况及乳液的粒径。结果表明:通过原位聚合得到的复合材料拉伸强度明显改善,由纯水性聚氨酯的10.13 MPa增加到28.96 MPa;当APTMS-GO质量分数为0.22%时,复合材料的初始分解温度(T_(d5))增大到279℃,与纯水性聚氨酯相比提高了34℃;随着APTMS-GO质量分数的逐步增大,复合膜的接触角由71.3°提高到91.28°,复合材料的疏水作用得到了改善。
[Abstract]:(APTMS) intercalation of 3-aminopropyl trimethoxysiloxane (APTMS) was used to modify graphene oxide (GO),) to obtain graphene aminoate (APTMS-GO). The structure and morphology of APTMS-GO were characterized by FTIR,XRD,Raman,TG,TEM,XPS. APTMS-GO and polyurethane prepolymer with isocyanate were polymerized in situ to obtain APTMS-GO/WPU nanocomposites containing APTMS-GO content (measured by the total mass of polyurethane raw material) of 0 0. 06% and 0. 16% 0.22% and 0. 55%, respectively, and their tensile properties were tested. FESEM and TEM were used to observe the dispersion of nano-filler and the particle size of emulsion. The results show that the tensile strength of the composites obtained by in-situ polymerization is obviously improved, from 10.13 MPa of pure waterborne polyurethane to 28.96 MPa;. When the mass fraction of APTMS-GO is 0.22, the initial decomposition temperature (TD5) of the composites increases to 279 鈩，
本文编号：2258934
[Abstract]:(APTMS) intercalation of 3-aminopropyl trimethoxysiloxane (APTMS) was used to modify graphene oxide (GO),) to obtain graphene aminoate (APTMS-GO). The structure and morphology of APTMS-GO were characterized by FTIR,XRD,Raman,TG,TEM,XPS. APTMS-GO and polyurethane prepolymer with isocyanate were polymerized in situ to obtain APTMS-GO/WPU nanocomposites containing APTMS-GO content (measured by the total mass of polyurethane raw material) of 0 0. 06% and 0. 16% 0.22% and 0. 55%, respectively, and their tensile properties were tested. FESEM and TEM were used to observe the dispersion of nano-filler and the particle size of emulsion. The results show that the tensile strength of the composites obtained by in-situ polymerization is obviously improved, from 10.13 MPa of pure waterborne polyurethane to 28.96 MPa;. When the mass fraction of APTMS-GO is 0.22, the initial decomposition temperature (TD5) of the composites increases to 279 鈩，
本文编号：2258934
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