CTAB/CPL复配改性黏土制备NBRCNs的结构与性能研究

Study on structure and performance of NBRCNs prepared by CTAB/CPL compound modified clay

采用CTAB/CPL(比例为3.0g∶1.0g)复配改性有机黏土制备NBRCNs,考察了复配改性有机黏土制备的NBRCNs的微观结构、力学性能和分散相态。实验结果表明,无机黏土经CTAB/CPL复配改性后,黏土晶层间距由起始1.25nm扩大至1.82nm,NBRCNs中黏土晶层间距进一步扩大为4.67nm,即橡胶大分子链进一步插层进入黏土片层中,制备得到插层型纳米复合材料。有机黏土用量为10份时,复配改性有机黏土制备的NBRCNs的各项力学性能最优,拉伸强度为5.16 MPa,撕裂强度为20.97kN/m,较纯NBR硫化胶的1.53MPa和8.77kN/m分别提高了237%和139%,且明显优于采用单一阳离子CTAB改性有机黏土制备的NBRCNs,充分显示了复配有机改性黏土的可行性和优越性。复配有机改性黏土制备的NBRCNs的微观分散相态优于单一阳离子改性有机黏土制备的NBRCNs。

NBRCNs is prepared by CTAB/CPL（ratio of 3.0g∶1.0g）compound modified organic clay.The microstructure,dispersed phase and properties of the CTAB/CPL compound modified organic clay preparation of NBRCNs.The results show that after CTAB/CPL compound modification of inorganic clay,lamella spacing of 1.82 nm is greater than the starting layer spacing of 1.25 nm with NBRCNs clay lamella spacing of 4.67 nm.The rubber macromolecule chain further intercalates into the clay layer,and intercalated nanocomposites are prepared.When organic clay dosage is 10 phr,Every mechanical performance of compound modified organic clay preparation of NBRCNs is the best,the tensile strength and tear strength is respectively5.16 MPa、20.97N/mm.1.53 MPa、8.77kN/m of pure NBR vulcanizates are respectively increased by 237% and 139%,and the mechanical properties of CTAB/CPL modified organic clay NBRCNs is superior to CTAB modified organic clay NBRCNs,which fully shows the feasibility and advantage of compound organic modified clay.The dispersion phase（SEM）of CTAB/CPL modified organic clay NBRCNs is superior to CTAB modified organic clay NBRCNs.