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采用动态热处理和预分散处理技术,以马来酸酐(MAH)或硅烷偶联剂(Si69)作处理剂对碱木质素(AL)进行了表面改性处理,考察了改性碱木质素在天然橡胶中的填充行为,并研究了其用作新型环保填料的可行性。结果表明,经MAH动态热处理后,碱木质素填充的天然橡胶(AL1-MAH)拉伸强度能达到16.3MPa,而未处理碱木质素填充的天然橡胶拉伸强度仅为12.4 MPa,Si69处理后的碱木质素填充的天然橡胶拉伸强度只有9 MPa左右。AL1-MAH试样交联密度最高,其混炼胶中天然橡胶与碱木质素之间的相互作用较强,其硫化胶力学性能明显好于AL1-Si69胶料。
Alkali lignin (AL) was surface modified with MAH or silane coupling agent (Si69) by dynamic heat treatment and pre-dispersion treatment. The effects of modified alkali lignin on natural Filling behavior in rubber and the feasibility of using it as a new environmentally friendly filler. The results showed that the tensile strength of natural lignin-filled natural rubber (AL1-MAH) reached 16.3MPa after dynamic heat treatment with MAH, while the tensile strength of untreated alkali lignin-filled natural rubber was only 12.4 MPa. After Si69 treatment Alkali lignin-filled natural rubber has a tensile strength of only about 9 MPa. The crosslink density of AL1-MAH sample is the highest. The interaction between natural rubber and alkali lignin in the mixture is stronger, and the mechanical properties of vulcanizate are better than that of AL1-Si69.