为解析木塑复合材料的界面相容性机制,通过介电弛豫过程分析研究不同硅烷偶联剂添加量的毛白杨木粉/聚丙烯复合材料的温度谱及频率谱,并计算介电弛豫过程中的表观活化能和热力学量.结果表明:在添加硅烷偶联剂的毛白杨木粉/聚丙烯复合材料中能观察到基于木材细胞壁无定形区中伯醇羟基的回转取向运动的弛豫过程;弛豫强度随硅烷偶联剂添加量增大先减少而后缓慢增大;随偶联剂添加量的增大,弛豫时间分布峰呈先变宽、变低,然后再变尖、变高趋势;表观活化能、活化焓、活化自由能和活化熵随硅烷偶联剂添加量增加先增大后减小.表观活化能在硅烷偶联剂添加量(质量比)为2.0％时达到最大值(28.12 kJ/mol),与未添加偶联剂的毛白杨木粉/聚丙烯复合材料的(13.86 kJ/mol)相比增加2倍以上,活化焓在硅烷偶联剂添加量从0％时的12.09 kJ/mol增大到2.0％时的26.35 kJ/mol,增大了117.9％,说明弛豫过程中伯醇羟基回转取向运动需要克服的能垒增加,毛白杨木粉与聚丙烯塑料的相容性更好,结合更紧密,界面强度更强,性能更加稳定.
参考文献
| [1] | 余方兵;宋剑斌;吴秋宁;陈丽红;杨文斌;侯伦灯.竹粉接枝改性及其对竹粉/PETG复合材料流变行为的影响[J].复合材料学报,2014(3):578-583. |
| [2] | 周亚巍;宁莉萍;王燕高;谢达华;伍胜;王俊.木聚糖酶处理对西南桦木/HDPE复合材料性能的影响[J].复合材料学报,2014(2):338-344. |
| [3] | 邓巧云;李大纲;王茹;杨静云.甲壳素纳米纤维/蒙脱土复合材料的制备与性能[J].复合材料学报,2014(5):1160-1166. |
| [4] | Lu JZ;Wu QL;Negulescu II.Wood-fiber/high-density-polyethylene composites: Coupling agent performance[J].Journal of Applied Polymer Science,20051(1):93-102. |
| [5] | 纪占敏;杜仕国;施冬梅;鲁艳玲.硅烷偶联剂在复合材料中的应用研究[J].现代涂料与涂装,2006(12):44-46. |
| [6] | 廖俊;陈圣云;刘英伟;刘超.硅烷偶联剂在涂料中的应用及其进展[J].精细与专用化学品,2006(19):1-3,19. |
| [7] | A.K. Bledzki;J. Gassan.Composites reinforced with cellulose based fibres[J].Progress in Polymer Science,19992(2):221-274. |
| [8] | 李志君;符新;余浩川;阮林光.改性橡胶木粉/HDPE复合材料结构和力学性能的研究[J].塑料,2006(3):1-5,98. |
| [9] | X. Colom;F. Carrasco;P. Pages.Effects of different treatments on the interface of HDPE/lignocellulosic fiber composites[J].Composites science and technology,20032(2):161-169. |
| [10] | P.J. Herrera-Franco;A. Valadez-Gonzalez.A study of the mechanical properties of short natural-fiber reinforced composites[J].Composites, Part B. Engineering,20058(8):597-608. |
| [11] | Cao Jinzhen;Zhao Guangjie.Dielectric Relaxation Based on Adsorbed Water in Wood Cell Wall under Non-equilibrium State. 1[J].Holzforschung,20003(3):321-326. |
| [12] | Cao Jinzhen;Zhao Guangjie.Dielectric Relaxation Based on Adsorbed Water in Wood Cell Wall Under Non-Equilibrium State 2.[J].Holzforschung,20011(1):87-92. |
| [13] | Sugimoto H;Miki T;Kanayama K;Norimoto M.Dielectric relaxation of water adsorbed on cellulose[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,200827(27):3220-3224. |
| [14] | Sugiyama M;Norimoto M.Dielectric relaxation spectra of chemically treated woods[J].Journal of Applied Polymer Science,20051(1):37-43. |
| [15] | Masaki Sugiyama;Misato Norimoto.Dielectric relaxation of water adsorbed on chemically treated woods[J].Holzforschung,20065(5):549-557. |
| [16] | WANG Lei;CAO Jin-zhen;WANG Yi.Dielectric properties of Simon poplar wood flour/polypropylene composite at oven-dry state[J].中国林学（英文版）,2008(04):265-269. |
| [17] | Zhu, L.;Cao, J.;Wang, Y..Evaluation of the interfacial compatibility in wood flour/polypropylene composites with the dielectric approach[J].Journal of Applied Polymer Science,20133(3):1520-1526. |
| [18] | Lizhi Zhu;Jinzhen Cao;Yi Wang.Effect of MAPP on Interfacial Compatibility of Wood Flour/Polypropylene Composite Evaluated With Dielectric Approach[J].Polymer Composites,20143(3):489-494. |
| [19] | Clemons, C.M.;Sabo, R.C.;Kaland, M.L.;Hirth, K.C..Effects of silane on the properties of wood-plastic composites with polyethylene-polypropylene blends as matrices[J].Journal of Applied Polymer Science,20113(3):1398-1409. |
| [20] | 宋永明;李春桃;王伟宏;王清文;谢延军.硅烷偶联剂对木粉/HDPE复合材料力学与吸水性能的影响[J].林业科学,2011(6):122-127. |
| [21] | 谢刚;历荣;崔丹;赵大晔;陈九顺.硅烷交联聚丙烯的研究工--引发剂用量、接枝剂用量和反应温度对凝胶率和熔体流动速率的影响[J].黑龙江大学自然科学学报,2002(1):99-102. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%