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以单向连续竹青纤维(OBF)和不饱和聚酯树脂(UP)制备了单向OBF/UP复合材料,研究了OBF含量对OBF/UP复合材料纵向静态力学性能及动态力学性能的影响,并采用SEM观察了复合材料拉伸断面处界面结合情况。结果表明:随着OBF含量的增加,OBF/UP复合材料静态力学性能呈先增加后减小趋势,当OBF含量为50wt%时,复合材料拉伸、弯曲性能最优,拉伸强度、拉伸模量、弯曲强度、弯曲模量分别达到285.52 MPa、16.06GPa、359.80 MPa、27.32GPa;OBF/UP复合材料存储模量随OBF含量增加呈先增加后减小趋势,当OBF含量为50wt%时,OBF/UP复合材料存储模量最大,且随着OBF含量的增加,OBF/UP复合材料玻璃化转变温度向低温方向移动,损耗峰变宽;断面处微观形貌表明,OBF含量为50wt%时,复合材料界面结合强度较好。制备的OBF/UP复合材料力学性能优良,有潜力取代玻璃纤维增强树脂复合材料在风电叶片材料、公路防护栏材料、船舶材料等领域的应用。
The unidirectional OBF / UP composites were prepared by one-way continuous bamboo fiber (OBF) and unsaturated polyester resin (UP), and the influence of OBF content on the longitudinal static mechanical properties and dynamic mechanical properties of OBF / SEM was used to observe the interface bonding at the tensile section of the composite. The results show that with the increase of the content of OBF, the mechanical properties of OBF / UP composites increase firstly and then decrease. When the content of OBF is 50wt%, the tensile and flexural properties of the composites are the best. The tensile strength, The modulus, flexural strength and flexural modulus reached 285.52 MPa, 16.06 GPa, 359.80 MPa and 27.32 GPa, respectively. The storage modulus of OBF / UP composites increased first and then decreased with the increase of OBF content. When the content of OBF was 50 wt% , The storage modulus of OBF / UP composites is the largest, and as the content of OBF increases, the glass transition temperature of OBF / UP composites moves to the low temperature and the loss peak broadens. The microstructure of the OBF / UP composites shows that the content of OBF is 50wt% , The composite interface bonding strength is better. The prepared OBF / UP composite material has excellent mechanical properties and potential to replace the application of the glass fiber reinforced resin composite material in the fields of wind turbine blade material, highway fence material and marine material.