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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。
Intercalation of graphene oxide (GO) with 3-aminopropyltrimethoxysilane (APTMS) gave an aminated graphene (APTMS-GO). The structure and morphology of APTMS-GO were characterized by FTIR, XRD, Raman, TG, TEM and XPS. The APTMS-GO and isocyanate prepolymers were polymerized by in-situ polymerization to obtain a polymer with APTMS-GO mass fraction (based on the total mass of the polyurethane synthesis material, the same applies hereinafter) of 0,0.06% 0.11%, 0.16%, 0.22%, 0.33% and 0.55% APTMS-GO / WPU nanocomposites were prepared and their tensile properties, thermal properties and hydrophobicity were tested. Material dispersion and particle size of the emulsion. The results showed that the tensile strength of the composites obtained by in-situ polymerization was significantly improved from 10.13 MPa to 28.96 MPa for pure aqueous polyurethane. The initial decomposition temperature (T_ ( d5) increased to 279 ℃, which was 34 ℃ higher than that of pure water polyurethane. With the increase of mass fraction of APTMS-GO, the contact angle of the composite membrane increased from 71.3 ° to 91.28 °. The hydrophobicity of composite The role has been improved.