摘要
研究了一种扬声器球顶夹层材料,采用离子束切割仪对碳纤/聚甲基丙烯酰亚胺(PMI)复合材料进行等离子切割,采用SEM对碳纤、PMI及复合材料结构进行表征,通过三点弯曲法对杨氏模量进行测试表征。研究结果表明:碳纤维密排有序,直径约6.7μm;PMI材料均匀分布在孔壁位置,闭孔结构的发泡直径随密度的增大而成倍地减少,高密度PMI比低密度的杨氏模量提升了4.1倍;当PMI充当复合材料夹层时,复合材料的杨氏模量提升了2.9倍,比模量提高了2.2倍;更小直径的PMI泡孔具有较高的杨氏模量,可以在减轻复合材料重量的同时提升比模量,充分发挥PMI在复合材料中起到结构增强作用。
Carbon fibre(CF)and polymethacrylimide(PMI)sandwich dome material of speaker was studied,the CF/PMI composites was plasma cut by ion beam cutter,the structure of carbon fiber,PMI and composite were characterized by SEM,the PMI was analyzed by FTIR,and the Young’s Modulus was characterized by three-point bending method.The results showed that the carbon fibers were arranged in an orderly manner,the diameter was about 6.7μm.PMI materials was evenly distributed on the pore wall,and the foaming diameter of closed cell structure decreased exponentially with the increase of density,the Young’s Modulus of high density PMI was 4.1 times higher than that of low density PMI.When PMI as the sandwich of composite materials,the Young’s Modulus of composite materials was 2.9 times higher,which was 2.2 times higher than that of low density PMI.The smaller diameter PMI cells had higher Young’s Modulus,which could reduce the weight of the composite and increase the specific modulus,so as to give full play to the role of PMI in the structure reinforcement of composite materials.
作者
王世伟
陈进
司景航
WANG Shiwei;CHEN Jin;SI Jinghang(GuoGuang Electric Company Limited,Guangzhou 510800,China)
出处
《造纸科学与技术》
2020年第4期14-18,共5页
Paper Science & Technology
