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对潍坊某地的膨润土(MMT)原料进行提纯、用碳酸钠作为钠化剂进行钠化改型及有机改性,制备出与聚合物相容性较好的有机膨润土(OMMT),将之与聚丙烯(PP)复合制备出PP/OMMT纳米复合材料。重点研究了不同改性剂对MMT层间距的影响以及OMMT用量对复合材料力学性能的影响。结果表明:在十八烷基苄基二甲基溴化铵(1827)和己内酰胺复合改性剂的作用下,MMT的层间距扩大到2.44 nm;在一定范围内,随着OMMT用量的增加,PP/OMMT纳米复合材料的冲击强度和拉伸强度呈现先提高再降低的趋势,OMMT用量为2%时,复合材料的缺口冲击强度达到6.65 kJ/m2,拉伸强度达到24.53 MPa。
The bentonite (MMT) raw material in a certain place in Weifang was purified, and sodium carbonate was used as the sodium substitution agent to modify and organically modify the bentonite to prepare the organic bentonite (OMMT) which has good compatibility with the polymer, Polypropylene (PP) composite prepared PP / OMMT nanocomposites. The effects of different modifiers on the spacing of MMT layers and the effects of OMMT dosage on the mechanical properties of the composites were mainly studied. The results showed that the interlayer distance of MMT expanded to 2.44 nm under the action of octadecylbenzyldimethylammonium bromide (1827) and caprolactam composite modifier. With the increase of OMMT content within a certain range, The impact strength and tensile strength of PP / OMMT nanocomposites increase first and then decrease. When the content of OMMT is 2%, the notched impact strength of the composites reaches 6.65 kJ / m2 and the tensile strength reaches 24.53 MPa.