纳米SiO_(2)改性竹纤维/乙烯基树脂复合材料界面相容性  

Interfacial compatibility of nano-SiO(2) modified bamboo fiber/vinyl ester resin composites

作　　者：徐灿 陆继倾 白天 程万里[1] 王戈 程海涛 韩广萍[1] XU Can;LU Jiqing;BAI Tian;CHENG Wanli;WANG Ge;CHENG Haitao;HAN Guangping(Key Laboratory of Bio-based Material Science and Technology of Ministry of Education,Northeast Forestry University,Harbin 150040,China;International Center Bamboo and Rattan,Beijing 100102,China)

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,哈尔滨150040 [2]国际竹藤中心,北京100102

出　　处：《复合材料学报》2021年第9期2768-2778,共11页Acta Materiae Compositae Sinica

基　　金：“十三五”国家重点研发计划项目(2017YFD0600802);国家自然科学基金(32071850)。

摘　　要：以乙烯基树脂(VE)为基体,竹纤维(BF)为增强材料,通过偶联剂KH602对纳米SiO_(2)进行改性处理,并利用改性后纳米SiO_(2)分别对竹纤维和树脂进行改性处理,采用真空辅助树脂传递模塑成型工艺(VARTM)制备了BF/VE复合材料。采用FTIR、SEM对改性后纤维和树脂的表面物理化学状态进行表征,结果表明:改性纳米SiO_(2)成功化学接枝到竹纤维表面且分散到树脂基体中,改性纳米SiO_(2)在BF1/VE0.5 (用1.0wt%改性纳米SiO_(2)改性纤维和0.5wt%改性纳米SiO_(2)改性树脂)复合材料中分散更为均匀;采用力学试验机和SEM对复合材料力学、断口和表面形貌进行分析,考察改性纳米SiO_(2)的添加量对BF/VE复合材料力学性能、界面性能的影响。结果表明:BF1/VE0.5复合材料的拉伸、弯曲及冲击强度分别达到最大值49.0 MPa、70.6 MPa和150.4 J/m,与未处理的复合材料相比分别提高了18.9%、26.1%、70.7%。此外,还初步探讨了改性纳米SiO_(2)的界面增强机制。Bamboo fiber/vinyl ester resin(BF/VE) composites were prepared via vacuum-assisted resin transfer molding(VARTM). Nano-SiO_(2) modified by coupling agent KH602 was used to modify BF and VE resin, the surface physical and chemical properties of modified fibers and resin were characterized by scanning electron microscope(SEM) and Fourier transform infrared spectroscopy(FTIR). Analysis of SEM and FTIR results show that nano-SiO_(2) is successfully grafted onto the BF surface and dispersed into the resin matrix;Nano-SiO_(2) is more evenly dispersed in BF1/VE0.5(1.0 wt% modified nano-SiO_(2) was used to modify BF and 0.5 wt% modified nano-SiO_(2) was used to modify resin) composites. The mechanical properties, fracture and surface morphologies of BV/VE composites were analyzed by mechanical testing machine and SEM. Effects of the modified nano-SiO_(2) addition content on the mechanical properties and interfacial properties of BF/VE composites were investigated and analyzed. Through mechanical tests, the tensile, flexural and impact strengths of the BF1/VE0.5 composites reach to the maximum value of 49.0 MPa, 70.6 MPa, and 150.4 J/m, which are increased by 18.9%, 26.1% and 70.7% respectively compared with the untreated composites. Besides, the interface enhancement mechanism of modified nano-SiO_(2) was preliminarily discussed.

关 键 词：纳米SiO_(2) 竹纤维 乙烯基树脂 VARTM 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]