摘要
以钠基蒙脱土(Na-MMT)为原料,十六烷基三甲基溴化铵(CTAB)为插层剂,成功地制备出有机蒙脱土(OMMT),对其结构分析表明:蒙脱土的层间距由1.43nm增加到1.925～3.85nm。用该有机蒙脱土对R-122进行改性,成功制备了R-122复合材料,当有机蒙脱土的在树脂中添加的质量分数为4.0%时,冲击强度达到最大值21.2J/m,比纯树脂的提高了92.7%;扫描电镜分析表明:复合材料的断口呈复杂的层状分布,说明复合材料形成的新表面多,吸收的冲击能多;差示扫描热量分析表明,蒙脱土的加入使环氧树脂的耐热性得到进一步提高。利用有机蒙脱土对R-122树脂改性同时提高了韧性和耐热性,为R-122基高性能复合材料的制备提供了新的途径。
OMMT（organic montmorillonite） was prepared by ion exchanging between Na-montmorillonite and cetyl trimethyl ammonium bromide（CTAB） and thencharacterized. The results of FT-IR spectra showed that the organic rea gents had intercalated into the layers of MMT successfully, the results of X-ray diffraction illustrated that the spacing of layers of MMT was increased from 1.43nrn tol. 93-3.85max R-122 composite was prepared with this nano-organic montmorillonite. When the content of OMMT was 4. 0% （wt%）, the resistance to impact of composite reached the highest（21.2 J/ m）, 92. 7% higher than the pure resin＇ s. The complex morphology of the fracture was tested by SEM, and a depth depended distribution appeared that it had more new surface, and more impact energy can be absorbed. The analysis of differential scanning calorimetry（DSC） showed that the thermal stability of the composite was improved compared with the pure resin, s. Both the toughness and heat resistance of R-122 nanocomposite modified by organo-montmorillonite were improved , so a new production way of R-122 high performance composites was provided.
出处
《化工新型材料》
CAS
CSCD
北大核心
2013年第5期60-62,共3页
New Chemical Materials
关键词
有机蒙脱土
R-122环氧树脂
纳米复合材料
冲击强度
耐热性
organic montmorillonite,dicyclopentadiene dioxide epoxy（R-122）,nanocomposite,impact strength,heat resistance
