表面改性碳纤维增强羟基磷灰石复合材料抗弯性能的研究  

Study on bending property of hydroxyapatite matrix compositions reinforced by modified carbon fibers

作　　者：李强[1,2] 穆柏春[1] 于景媛[1] 孙旭东[2] 

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《功能材料》2013年第7期940-943,共4页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA060102);长江学者和创新团队计划资助项目(IRT0713);辽宁省自然科学基金资助项目(201102090);辽宁省博士启动基金资助项目(20111068);辽宁省高等学校杰出青年学者成长计划资助项目(LJQ2012056)

摘　　要：通过在碳纤维表面原位生成莫来石保护层和对氨基苯甲酸表面处理来改性碳纤维,将改性碳纤维与羟基磷灰石(HA)复合,制备表面改性碳纤维增强HA复合材料。研究改性前后的碳纤维对复合材料抗弯强度的影响并分析增强机理。结果表明,随纤维含量的增加复合材料的抗弯强度先提高后下降,碳纤维含量为3%(体积分数)时复合材料的抗弯强度达到最大值。碳纤维、表面处理碳纤维、表面复合处理碳纤维增强HA材料的抗弯强度均随烧结温度的升高而提高,且整体提高幅度依次增大,当烧结温度达1150℃时,3种材料的抗弯强度达最大值,分别为55.13、100.95、112.17MPa。表面复合处理碳纤维增强HA材料的抗弯强度比基体提高最多为3.5倍。这主要归因于碳纤维表面通过原位反应形成莫来石3Al2O3.2SiO2保护层,同时经对氨基苯甲酸处理后碳纤维对HA有更好的亲和性和吸附性。Carbon fibers were modified by in-situ synthesizing mullite protective layer and treating with p-aminobenzoic acid.The modified carbon fibers were composited with hydroxyapatite matrix and the new HA compositions were prepared.The effect of carbon fibers before and after modification on bending strength of HA compositions was studied and the reinforced mechanism was analyzed.The results show that with the increase of content of carbon fibers the bending strengths of the compositions first increase and then decrease.The bending strength comes to maximum at the content of carbon fiber of 3vol%.When the sintering temperature increases,the bending strengths of carbon fiber,modified carbon fiber and carbon fiber after duplicated surface modification all increase.Simultaneously the whole improved range of three type of compositions increases successively.When sintered at 1150℃,the bending strengths of the compositions come to maximum and was 55.13,100.95,112.17MPa,respectively.The bending strength of hydroxyapatite matrix composites reinforced by carbon fibers after duplicated surface modification improve 3.5 time by HA matrix.The reason is that the surface of modified carbon fibers have in-situ synthesizing mullite protective layer and p-aminobenzoic acid has good compatibility and adsorbability about HA.

关 键 词：表面改性 碳纤维 羟基磷灰石 强化 

分 类 号：TQ171.74[化学工程—玻璃工业]