摘要
采用多溶剂分散法制备片层尺寸达微、纳米级蒙脱土,并与天然鲜胶乳混合制备蒙脱土/天然橡胶复合材料,用扫描电镜研究蒙脱土结构及其在复合材料中的分布,并测定其力学性能。结果表明,通过多溶剂分散法可制备片层厚度为100nm^200nm的蒙脱土;在蒙脱土填充量为7%时,复合材料500%定伸应力从6.96MPa提高到11.22MPa;加入2%蒙脱土,复合材料拉伸强度从17.71MPa提高到21.01MPa;在4%填充量下,拉伸强度达23.56MPa,体现蒙脱土纳米增强效应。材料扯断伸长率随蒙脱土填充量增加而下降的幅度小,复合材料保持高弹性。复合材料硬度在蒙脱土填充量为8%时达到稳定值。上述结果表明,天然鲜胶乳可与蒙脱土直接复合,制备高性能天然橡胶复合材料。
The micro-and nano-montmorillnates were prepared by multi-solvents dispersing method and mixed with natural rubber fresh latex to make montmorillnate/natural rubber composite. The structures of the montmorillnate and the composites were studied by using SEM and the physics-mechanical properties of the composites were determined. The results show that the montmorillnate can be exfoliated into micro-and nano-laminas with the size of 100nm - 200nm by the multi-solvents dispersing method. When the content of the montmorillnate was 7%, 500% modulus of the composite increased to 11.22MPa and the contrast was 6.96MPa. The tensile strength of the composite with 2% montmorillnate enhanced to 21.01MPa and the contrast was 17.71MPa. The tensile strength of the composite contained 7% montmorillnate reached to 23.56MPa. With the increase of the content of the montmorillnate, the elongation at break of the composites decreased slowly while the composites kept high elastic. These results indicates that natural rubber fresh latex can be mixed with montmorillnates to prepare high performance natural rubber composite.
出处
《电子显微学报》
CAS
CSCD
2006年第2期135-138,共4页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金资助项目(No.30160012)~~
关键词
蒙脱土
天然橡胶
复合材料
结构
性能
montmorillnate
natural rubber latex
composite
structure
properties
