苎麻纳米粉增强环氧复合材料制备与性能

The preparation and properties of ramie nano-powder reinforced epoxy composite

为拓宽苎麻纤维的应用领域,以苎麻布为增强相,环氧树脂为基体,采用模压成型法同时添加纳米Sn(OH)4和Al(OH)3制备复合材料,将其用于电子封装材料.同时研究纳米粉含量对材料抗拉强度和热性能的影响.结果表明,添加单一粉体时,随着Sn(OH)4和Al(OH)3含量的增加,材料的抗拉强度先增大后减小.当Sn(OH)4的质量分数为12%时,抗拉强度达到最大值84.32MPa;当Al(OH)3的质量分数为10%时,抗拉强度达到最大值67.33MPa;当添加混合粉体8%,Sn(OH)4∶Al(OH)3为2∶1和1.5∶1时,材料的抗拉强度为60MPa左右;其后随混合粉体中Sn(OH)4的减少,材料的抗拉强度显著下降.添加纳米粉复合材料的导热系数均比环氧树脂的导热系数大,300℃以下复合材料的热稳定性良好.

In order to expand application fields of ramie,with the ramie cloth taken as reinforced material and epoxy resin as base material,the composite material is prepared by moulding compression method with nano Sn(OH)4and Al(OH)3.The material can be used for elctrical packaging materials.The effects of nano powder content on the tensile strength and thermal properties of the composite materials are studied.The results show that with single powder added and Sn(OH)4and Al(OH)3increased,the tensile strength of composite materials shows decrease after the first rise. When Sn(OH)4content is 12%,the maximum tensile strength is84.32 MPa.When Al(OH)3content is 10%,the maximum tensile strength is 67.33 MPa.When8% mixture powder is added and the proportion of Sn(OH)4to Al(OH)3is 2∶1and 1.5∶1,the tensile strength is substantially equal to about 60 MPa.Then,with reduction of Sn(OH)4proportion in the mixture,the tensile strength decreases significantly.Thermal conductivity of composite materials is larger than that of epoxy resin,and below 300℃the composite materials have favorable heat stability.