• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Fabrication of PVDF/graphene composites with enhanced β phase via conventional melt processing assisted by solid state shear milling technology
【24h】

Fabrication of PVDF/graphene composites with enhanced β phase via conventional melt processing assisted by solid state shear milling technology

机译：通过固态剪切铣削技术辅助的常规熔体加工制备具有增强β相的PVDF /石墨烯复合材料

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The β-phase crystal, which decides the final electric properties of poly(vinylidene fluoride) (PVDF), is extremely difficult to obtain via conventional melt processing due to its thermal instability. In this work, with the assistance of our independently developed solid state shear milling (S ~(3) M) technology, which could provide multiple stresses and form a micro-stretching field on PVDF to promote the transformation of more α phase to β phase, PVDF/graphene (PVDF/GP) composite with relatively higher β phase (42.2%), higher than that directly prepared by melt blending without S ~(3) M (33.0%), and dielectric properties was achieved through conventional melt extrusion and injection. When the GP content was 1.0 wt%, the dielectric constant of the composite was 465 at 1000 Hz, about 42 times that of pure PVDF. The special squeezing and shearing forces of S ~(3) M also realized the exfoliation of GP as well as the solid grafting of GP layers on PVDF molecules, improving the dispersion of GP layers in PVDF and making them effectively exert their heterogeneous nucleation as well as enhancement effects on PVDF, thus increasing the crystallinity, thermal stability and mechanical properties of the composites.
机译：通过其热不稳定性，通过常规熔体加工来决定聚（偏二氟乙烯）（PVDF）的最终电性能的β相晶极其难以通过常规熔体加工获得。在这项工作中，在我们独立开发的固态剪切铣削（S〜（3）M）技术的帮助下，这可以提供多种应力并在PVDF上形成微伸展场，以促进更多α相的转化为β相，PVDF /石墨烯（PVDF / GP）复合材料具有相对较高的β相（42.2％），高于通过没有S〜（3）m（33.0％）的熔体混合而直接制备的，通过常规熔体挤出实现介电性能和注射。当GP含量为1.0wt％时，复合材料的介电常数为465，1000Hz，约42倍的纯PVDF。 S〜（3）M的特殊挤压和剪切力也意识到GP的剥离以及PVDF分子上的GP层的固体接枝，改善了GP层在PVDF中的分散，使它们同时有效地施加其异质成核作为PVDF的增强效果，从而增加了复合材料的结晶度，热稳定性和机械性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号