以蒙脱土和木质纤维素为原料,制备了木质纤维素/蒙脱土补强剂,将其和炭黑并用作为天然橡胶/丁苯橡胶的增强材料。研究了该补强剂与炭黑配比对天然橡胶/丁苯橡胶硫化性能、力学性能、表观交联密度、加工性能等的影响。结果表明,当木质纤维素/蒙脱土补强剂用量逐渐增加时,橡胶复合材料的焦烧时间逐渐减小,正硫化时间先减小后增大;表观交联密度逐渐降低;储能模量逐渐降低。木质纤维素/蒙脱土补强剂与炭黑配比为10∶40时,天然橡胶/丁苯橡胶表现出最优的力学性能,拉伸强度为24.06MPa,断裂伸长率为718.2%,邵氏A硬度为75.6°。
The lignocelloulose-montmorillonite rubber reinforcing agent was prepared by using lignocelloulose and montmorillonite.The rubber reinforcing agent and carbon black have been used as the reinforcing fillers for natural rubber(NR)/styrene butadiene rubber(SBR).The effects of mass ratio of lignocelloulose-montmorillonite rubber reinforcing agent and carbon black on curing behavior,mechanical properties,apparent crosslinking density,processing properties of NR/SBR were studied.The results shown that with increasing the lignocelloulose-montmorillonite rubber reinforcing agent loading,the scorch time(T10) decreased gradually,the optimum cure time(T90) decreased first and then increased,the apparent crosslinking density and storage modulus(G′) decreased gradually.When the mass ratio of lignocelloulose-montmorillonite rubber reinforcing agent and carbon black was 10∶40,the NR/SBR composites exhibited the best mechanical properties,tensile strength:24.06MPa,elongation at break:718.2%,shore A hardness:75.6°.
[1] Nabil H,Ismail H,Azura A R.Compounding,mechanical and morphological properties of carbon-black-filled natural rubber/recycled ethylene-propylene-diene-monomer (NR/R-EPDM) blends[J].Polymer Testing,2013(32):385-393.
[2] Rattanasom N,Saowapark T,Deeprasertkul C.Reinforcement of natural rubber with silica/carbon black hybrid filler[J].Polymer Testing,2007(26):369-377.
[3] Gu J,Chen W J,Lin L,et al.Effect of nanocrystalline cellulose on the curing characteristics and aging resistance properties of carbon black reinforced natural rubber[J].Chinese Journal of Polymer Science,2013,31(10):1382-1393.
[4] Zhao G Z,Shi L Y,Zhang D S,et al.Synergistic effect of nanobarite and carbon black fillers in natural rubber matrix[J].Materials and Design,2012(35):847-853.
[5] 王莹春,曾超敏,鹿现哲,等.催化剂在木质纤维素液化中应用的研究进展[J].高分子材料科学与工程,2017,33(3):174-179.
[6] 朱晨杰,张会岩,肖睿,等.木质纤维素高值化利用的研究进展[J].中国科学:化学,2015,45(5):454-478.
[7] 彭志远,谌凡更.木质纤维素基高分子材料的研究进展[J].高分子材料与科学,2009,25(8):167-170.
[8] 丁国新.一种改性木质纤维素/天然橡胶复合材料及其制备方法:中国,201410023181.X[P].2015-09-30.
[9] 丁国新,程国君,李亭亭,等.木质纤维素/蒙脱土橡胶补强剂的制备及应用[J].化工新型材料,2017,45(2):219-221.
[10] 丁国新.一种木质纤维素/蒙脱土橡胶补强剂的制备方法及橡胶的补强方法:中国,201410172402.X[P].2016-04-27.
[11] 王杰,周洪福,张建春.预处理对汉麻杆芯粉填充天然橡胶/丁苯橡胶性能的影响[J].中国塑料,2017,31(3):40-45.
[12] 战艳虎,伍金奎,闫宁,等.超声分散制备天然橡胶/丁苯橡胶/炭黑/碳纳米管纳米复合材料[J].高分子材料科学与工程,2011,27(1):130-134.
[13] 孟春财,陈建,张敬雨,等.炭黑对橡胶增强机理的研究现状[J].合成橡胶工业,2012,35(2):158-161.
[14] 刘丽,张如良,刘辉,等.炭黑/蒙脱土并用对HNBR复合材料性能的影响[J].材料科学与工艺,2011,19(2):100-107.
[15] 刘涛,陈亚薇,刘东,等.填充橡胶的Payne效应[J].特种橡胶制品,2015,36(6):76-81.
[16] 曲明,傅国娟,史新研.炭黑N660用量对溴化丁基橡胶动态力学性能的影响[J].合成橡胶工业,2017,40(1):69-73.
[17] 罗明超,廖小雪,廖双泉,等.微波处理和溶胶-凝胶法共同改性废胶粉及其与天然橡胶复合材料性能的研究[J].高分子学报,2013(7):896-902.
[18] 张林,左孔成,朱旻昊,等.片状石墨粉/受阻酚小分子-丁腈橡胶共混物动态力学性能[J].复合材料学报,2015,32(5):1480-1486.
基金资助
安徽省高校自然科学重点研究项目(KJ2016A187);安徽省高校优秀青年人才支持计划项目(gxyq2018015)
PDF
(3103KB)
