国产高强高模PAN基碳纤维预浸料的制备及性能研究

Preparation and properties of China-made high-strength andhigh-modulus PAN-based carbon fiber prepreg

以国产CNI QM55高强高模聚丙烯腈(PAN)基碳纤维、氰酸酯树脂为原料,利用热熔法制备高强高模PAN基碳纤维预浸料,通过纤维面密度、树脂含量、挥发分含量等来评价预浸料的物理性能,结合单向板的微观形貌与层间剪切强度分析单向板的界面结合性能,并对预浸料铺制单向板的力学性能进行表征。结果表明:CNI QM55碳纤维预浸料的纤维面密度为145 g/m^(2),树脂质量分数为35.5%,挥发分质量分数为0.164%,预浸料的物理性能满足复合材料的性能要求;以CNI QM55碳纤维预浸料制备的单向板0°拉伸强度为2 429 MPa, 0°拉伸模量为328.4 GPa,弯曲强度为1 171 MPa,弯曲模量为280 GPa,压缩强度为783 MPa,压缩模量为257 GPa,层间剪切强度为65.2 MPa,具有较好的界面黏接性能和力学性能,可满足加工应用要求。

A high-strength and high-modulus polyacrylonitrile(PAN)-based carbon fiber prepreg was prepared by using China-made CNI QM55 high-strength and high-modulus PAN based carbon fiber and cyanate ester resin as raw materials via hot-melt method.The physical properties of the prepreg were evaluated by the fiber surface density,resin content,volatile content,etc.The interface bonding performance of the unidirectional laminate was analyzed based on the micro-morphology and interlaminar shear strength of the unidirectional laminate.And the mechanical properties of the unidirectional laminate laid up with the prepreg were characterized.The results showed that CNI QM55 carbon fiber prepreg had a fiber surface density of 145 g/m 2,a resin mass fraction of 35.5%,and a volatile mass fraction of 0.164%,and the physical properties of the prepreg met the performance requirements of composite materials;and the unidirectional laminate laid up with CNI QM55 carbon fiber prepreg had a 0°tensile strength of 2429 MPa,0°tensile modulus of 328.4 GPa,bending strength of 1171 MPa,bending modulus of 280 GPa,compressive strength of 783 MPa,compression modulus of 257 GPa and interlaminar shear strength of 65.2 MPa,indicating a good interfacial adhesion and mechanical properties meeting the processing requirements.