碳纤维对Cf-HA／PMMA复合材料力学性能的影响  

INFLUENCE OF CARBON FIBER ON MECHANICAL PROPERTIES OF C_f-HA/PMMA COMPOSITES

作　　者：曾丽平[1] 曹丽云 黄剑锋 郭申 

机构地区：[1]陕西科技大学,教育部轻化工助剂化学与技术重点实验室,西安710021 [2]富维薄膜山东有限公司,山东潍坊261061

出　　处：《硅酸盐学报》2009年第6期960-963,共4页Journal of The Chinese Ceramic Society

基　　金：陕西省教育厅自然科学专项基金(08JK220);陕西省自然科学基金(ST08-ZT05);陕西科技大学博士科研基金(BS08-09);教育部新世纪优秀人才支持计划基金(ENCT-06-0893)资助项目。

摘　　要：采用原位合成和溶液共混相结合的方法,制备了短切碳纤维(C_f)增强纳米羟基磷灰石(hydroxyapatite,HA)/聚甲基丙烯酸甲酯[poly(methyl methacrylate),PMMA]生物复合材料(C_f-HA/PMMA)。重点研究了短切碳纤维对C_f-HA/PMMA复合材料的微观结构和力学性能的影响。采用万能材料试验机测试了C_f-HA/PMMA复合材料的力学性能,使用扫描电子显微镜对材料微观形貌进行了测试和表征。结果表明:采用浓硝酸和二甲基亚砜处理后的碳纤维与PMMA基体的界面结合性得到有效改善,显著提高了C_f-HA/PMMA复合材料的力学性能;碳纤维和HA的质量分数分别为4%和8%,复合材料的弯曲强度、弯曲模量、拉伸强度和压缩强度均达到最佳值。Short carbon fiber （Cf） reinforced nano-hydroxyapatite （HA）/poly（methyl methacrylate） （PMMA） matrix composites （Cf-HA/PMMA） were prepared by an in-situ processing and solution mixture process. The influences of short carbon fiber on the mechanical properties and microstructure of the Cf-HA/PMMA composites were particularly investigated. The mechanical properties were tested using a universal testing machine. The fracture surface morphologies were characterized using a scanning electron microscope. The results show that the interface bonding between the carbon fiber and PMMA matrix and the mechanical properties of Cf-HA/PMMA composites are obviously improved by surface modification of carbon fiber with nitric acid and dimethyl sulfoxide （DMSO）. When the surface modified carbon fiber and HA mass fraction reaches 4% and 8%, respectively, the flexural strength, flexural modulus, tensile strength, and compressive strength of the as-prepared Cf-HA/PMMA composites reaches the maximum value.

关 键 词：复合材料 聚甲基丙烯酸甲酯 力学性能 短切碳纤维 

分 类 号：TB332[一般工业技术—材料科学与工程]