以钠基蒙脱土(Na-MMT)和十八烷基三甲基氯化铵(OTAC)为原料制备有机蒙脱土(OMMT),将 OMMT和氯丁橡胶(CR)混炼制得氯丁橡胶/有机蒙脱土(CR/OMMT)纳米复合材料。通过X射线衍射分析仪、热重分析仪对复合材料的结构和热稳定性能进行分析,研究了OMMT用量对复合材料性能的影响。结果表明:OTAC已进入Na-MMT层间,层间距由1.62nm增至2.19nm。随着OMMT用量的增加,复合材料邵氏A硬度增加,回弹率降低,烟密度等级减小,极限氧指数增大;OMMT用量为9份、12份时,复合材料的拉伸强度、撕裂强度分别达到最大值22.5MPa和33.6kN/m。OMMT使复合材料的物理机械性能和热稳定性得到改善,且有一定的抑烟和阻燃效果。
Organic montmorillonite(OMMT) was prepared from sodium montmorillonite(Na-MMT) and octadecyltrimethyl ammonium chloride(OTAC).Chloroprene rubber/organic montmorillonite (CR/OMMT) nanocomposites were prepared by mixing OMMT with chloroprene rubber (CR).The structure and thermal stability of the composites were analyzed by X-ray diffraction analyzer and thermogravimetric analyzer,and the effect of OMMT content on the properties of the composites was studied.The results showed that OTAC entered the Na-MMT layer and the layer spacing changed from 1.62nm to 2.19nm.With the increase of the dosage of OMMT,the hardness of the composites increased,the rebound rate declined,the smoke density level reduced,the limit oxygen index increased,tensile strength and tear strength reached a maximum of 22.5MPa and 33.6kN/m at 9 and 12 parts respectively.OMMT improved the physical and mechanical properties and thermal stability of the composites,and had certain smoke suppression and flame retardant effects.
[1] 朱青.聚合物/层状硅酸盐纳米复合材料的制备与性能研究[D].南京:南京大学,2016.
[2] Soundararajah Q Y,Karunaratne B S B,Rajapakse R M G.Montmorillonite polyaniline nanocomposites:preparation,characterization and investigation of mechanical properties[J].Materials Chemistry and Physics,2009,113(2):850-855.
[3] 樊梅秀.高分散粘土/橡胶纳米复合材料的制备及性能研究[D].北京:北京化工大学,2014.
[4] Zhang L Q,Wang Y Z,Wang Y Q,et al.Morphology and mechanical properties of clay/styrene butadiene rubber nanocomposite[J].Journal of Applied Polymer Science,2000,78(11):1873-1878.
[5] Wang Y Z,Zhang L Q,Tang C H,et al.Preparation and characterization of rubber-clay nanocomposite[J].Journal of Applied Polymer Science,2000,78(11):1879-1883.
[6] 王鉴,臧伟鹏,祝宝东,等.蒙脱土表面改性研究进展[J].硅酸盐通报,2015,34(3):749-754;763.
[7] 徐文,武小雷,孙伟福.聚合物/层状矿物纳米复合材料的研究进展[J].硅酸盐学报,2016,44(5):769-779.
[8] 吴伟.蒙脱土的改性及其应用研究[D].贵阳:贵州师范大学,2016.
[9] 郭妍婷,黄雪,陈曼,等.蒙脱土的有机改性研究进展[J].化工新型材料,2017,45(3):37-39.
[10] 王迎雪,刘昆林,丁正,等.有机化蒙脱土改性聚合物基纳米复合材料的研究进展[J].塑料,2016,45(6):114-118.
[11] 曹青,许兰娟.有机插层剂对蒙脱土改性研究[J].化工新型材料,2017,45(8):197-199.
[12] 陈宝书,廖力,赵天宝,等.有机蒙脱土与膨胀阻燃剂协同阻燃聚丙烯[J].化工新型材料,2018,46(11):181-184.
[13] 曹仁伟,张凯,黎俊杰,等.有机蒙脱土用量对溴化丁基橡胶/炭黑复合材料结构与性能的影响[J].合成橡胶工业,2018,41(4):294-298.
[14] 赖登旺,李笃信,杨军,等.季铵盐复配硅烷偶联剂改性蒙脱土的制备及表征[J].硅酸盐通报,2014,33(6):1298-1302.
[15] 赵敏敏.蒙脱土改性及其与壳聚糖复合材料的性能研究[D].南京:南京林业大学,2017.
[16] 赵哲.复配改性蒙脱土/丁腈胶乳纳米复合材料结构与性能研究[D].太原:中北大学,2017.
[17] 谷正,单春鹏,李培耀,等.有机蒙脱土/氯丁橡胶纳米复合材料的结构与性能及在输送带中的应用[J].橡胶工业,2012,59(3):161-165.
[18] 丁国新,程国君.氯丁橡胶/有机改性蒙脱土纳米复合材料的制备与性能[J].化工新型材料,2013,41(12):43-45.
[19] 赵艳芳,刘丹,林升博,等.氯丁橡胶共混改性研究概况[J].弹性体,2014,24(4):78-82.
[20] 曾凤娟,刘作华,左赵宏,等.氯丁橡胶的改性研究进展[J].化工进展,2013,32(6):1347-1351.
