剑麻纤维素微晶增强酚醛树脂复合材料的制备及性能  

Preparation and properties of sisal fiber cellulose microcrystal reinforced phenol-formaldehyde resins composites

作　　者：韦春[1] 曾思华[1] 黄绍军[1] 刘红霞[1] 吕建[1] 余柏传 

机构地区：[1]桂林理工大学广西有色金属及特色材料加工省部共建国家重点实验室培育基地材料科学与工程学院,桂林541004

出　　处：《复合材料学报》2013年第S1期306-310,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(21264005;21204013;51263005;51163003);广西自然科学基金(2013GXNSFDA019008)资助

摘　　要：本研究通过从剑麻纤维(SF)中提取剑麻纤维素微晶,采用KH550对纤维素微晶进行表面改性,得到改性剑麻纤维素微晶(MSFCM),将不同含量的MSFCM与酚醛树脂(PF)熔融共混制备MSFCM/PF复合材料,采用DMA和定速式摩擦试验机分别研究不同MSFCM添加量对MSFCM/PF复合材料的力学性能、蠕变、应力松弛性能和摩擦学性能的影响,并采用扫描电镜(SEM)对复合材料的冲击断面和磨损面形貌进行分析。研究结果表明,当MSFCM加入量为6%时,复合材料的冲击强度提高了50.32%,添加量为4%的复合材料的弯曲强度和弯曲模量分别提高了31.37%和18.85%。MSFCM的加入也显著提高了MSFCM/PF复合材料的蠕变和应力松弛性能。当MSFCM加入量为6%时,复合材料的摩擦系数稳定在0.36~0.44之间,比未加MSFCM复合材料的体积磨损率降低了15%,摩擦磨损性能达到GB5763-2008要求。In this paper,sisal fiber cellulose microcrystal(SFCM)was extracted from sisal fiber,then SFCM was modified by silane coupling agent KH550 which is called MSFCM.The MSFCM/phenol-formaldehyde(PF) composites with different contents of MSFCM were prepared by blending technology and molding method.The mechanical properties,creep,stress relaxation and friction properties of MSFCM/PF composites were investigated by DMA and constant speed tribological tester(DMS).The impact fracture and worn surface of MSFCM/PF composites were observed by scanning electron microscope(SEM).The results showed that when MSFCM content is 6%,the impact strength of the MSFCM/PF composites are increased by 50.32%,as comparing with pure PF composites.The creep,stress relaxation properties of the MSFCM/PF composites are also improved.When MSFCM content is 4%,the creep and stress relaxation of the composites are increased by 31.37% and 18.85%, respectively.When MSFCM content is 6%,the friction coefficient is between 0.36~0.44,and the wear ratio is decreased by 15%,as comparing with pure PF composites.So friction coefficient and wear rate of the composites meet GB5763-2008requirement.

关 键 词：MSFCM MSFCM/PF复合材料 力学性能 摩擦学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]