农业工程学报2017，Vol.33Issue(6)：281-287,7.DOI:10.11975/j.issn.1002-6819.2017.06.036
纳米CaCO3增强竹浆纤维/环氧树脂复合材料的动态力学性能
Improving dynamic mechanical property of bamboo pulp fiber reinforced epoxy resin composite treated by nano calcium carbonate
摘要
Abstract
In this study, in order to make bamboo plastic composites develop toward the economizing, simplification and practicality, bamboo pulp fiber (BPF) and epoxy resin were served as the raw materials to manufacture the fiber reinforced composites by means of vacuum-assisted resin transfer molding (VARTM). The BPF was modified withnano calcium carbonate (CaCO3) using impregnation. The dynamic thermo mechanical property and interfacial property of the composites were analyzed using dynamic mechanical analysis. It was observed that when the test frequency was in the single digit (such as 1 Hz), the maximum storage modulus of the BPF treated by impregnation modification (IMBPF) reinforced epoxy resin composites(3421 MPa) increased by 30% in temperatures ranging from -20 to 120 °C compared to the control sample(2627 MPa). When the test frequency was multiple digits (1, 2, 5, 10 and 20 Hz) it had a similar effect on the BPF/epoxy resin composites and IMBPF/epoxy resin composites. Meanwhile, the storage modulus, loss modulus and loss factor all increased with the increasing of frequency and gradually moved to a higher temperature. The glass transition temperature of both BPF/epoxy resin composites and IMBPF/epoxy resin composites increased with the increase of the frequency, however, the loss factor had no significant change. In addition, the apparent activation energy of glass transition of IMBPF/epoxy resin composites (369.0 kJ/mol)with a lower glass transition temperature was lower than that of BPF/epoxy resin composite(495.8 kJ/mol), but the correlation between the logarithm of frequency and the reciprocal of the glass transition temperature for IMBPF/epoxy resin composites (R2=0.9876)was higher than BPF/epoxy resin composites(R2=0.9659), and at the same time, the determination coefficient of BPF/epoxy resin composites and IMBPF/epoxy resin composites was higher than 0.95. Moreover, when the composites were in glassy state and rubbery state at the selected temperature of –20, 40 and 100℃, the dependence of the storage modulus of IMBPF/epoxy resin composites on the test frequency was higher than the BPF/epoxy resin composites, which suggested that the loading of CaCO3 particles (15%) affected the dependence of the storage modulus of the composites on test frequency to a certain degree. In the test temperature range from -20 to 120℃, the variation of the interface performance parameter for IMBPF/epoxy resin composites was similar with that for BPF/epoxy resin composites, and was lower than the control sample.The interface performance parameterof BPF and matrix epoxy resin could reflect the temperature and the state of the composite interface. Therefore, the smaller the interface performance parameter, the better the interfacial adhesion, and thus the interfacial property of the composites was improved with nano CaCO3impregnation.关键词
复合材料/力学性能/纤维/纳米碳酸钙/浸渍改性/竹浆纤维/真空辅助树脂浸注/界面性能Key words
composite materials/mechanical properties/fibers/calcium carbonate nanoparticle/impregnation modification/bamboo pulp fiber/vacuum-assisted resin transfer molding/interfacial property分类
通用工业技术引用本文复制引用
王翠翠,程海涛,羡瑜,王戈,张双保..纳米CaCO3增强竹浆纤维/环氧树脂复合材料的动态力学性能[J].农业工程学报,2017,33(6):281-287,7.基金项目
国际竹藤中心基本科研业务费专项资金资助(1632016001) （1632016001）
北京市教育委员会共建项目专项资助(无编号)"非木质材料科学利用技术及应用" （无编号）
国家自然科学基金(31670571) （31670571）
北京市自然科学基金(6162019) （6162019）
浙江省共建项目(CZXC201410)联合资助 （CZXC201410）
