医疗器械用PF/GF复合材料的结构及使用寿命Structure and Service Life of PF/GF Composite materials for Rehabilitation Medical Instruments
李夏,王峰
LI Xia,WANG Feng
摘要(Abstract)：
用玻璃纤维(GF)对酚醛树脂(PF-8063)进行改性，制备短GF增强PF-8063 (PF-8063/SGF)复合材料和长GF增强PF-8063 (PF-8063/LGF)复合材料。通过扫描电子显微镜对复合材料的冲击断面以及表面形貌进行分析，采用人工加速老化试验研究热老化对复合材料力学性能的影响，结果表明：热老化后，复合材料表面出现了明显粉化情况，纤维和树脂间脱黏，基体中形成众多孔洞；随着老化时间的延长，复合材料的拉伸强度不断降低，老化温度越高，拉伸强度降低越快。在低于200℃的温度下，PF-8063/SGF复合材料具有更短使用寿命。
Phenolic resin(PF-8063) was modified by glass fiber(GF) to prepare short GF reinforced PF-8063(PF-8063/SGF) composites and long GF reinforced PF-8063(PF-8063/LGF) composites. The impact section and surface morphology of the composites were analyzed by scanning electron microscopy. The effects of thermal aging on mechanical properties of composites were studied by artificial accelerated aging test. The results show that after thermal aging, the surface of the composites appear obvious powder, the adhesion between fiber and resin is removed, and many holes are formed in the matrix. With the extension of aging time, the tensile strength of composites decreases continuously, and the higher the aging temperature,the faster the tensile strength decreases. The PF-8063/SGF composites have a shorter service life at temperatures below 200 ℃.
关键词(KeyWords)：
酚醛树脂;玻璃纤维;复合材料;热老化;力学性能
phenolic resin;glass fiber;composite;thermal aging;mechanical property
基金项目(Foundation):
作者(Author):
李夏,王峰
LI Xia,WANG Feng
DOI: 10.16090/j.cnki.hcxw.2022.11.003
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