超声强迫浸渍预浸胶带研究  

Study on prepreg tape prepared by ultrasound

作　　者：张希甫 张翔[1] 杨晓军[1] 

机构地区：[1]西安航天复合材料研究所,西安710025

出　　处：《固体火箭技术》2015年第4期580-584,共5页Journal of Solid Rocket Technology

摘　　要：在炭布/树脂复合材料预浸过程中应用超声连续改性方法,对浸渍界面在线处理,采用金相及扫描电镜对超声强迫浸渍前后胶带的表观及截面进行了分析,表明在不改变胶带指标的情况下,超声处理后树脂已浸入炭纤维束,使得胶带的浸润性及浸渍均匀性均有较大改善。通过流体动力学和流体静力学对超声处理下的浸润过程进行了研究,结果表明,超声在酚醛树脂体系内引发的空化效应和声流搅拌作用,可在树脂体系中产生2.29×1011Pa的冲击压力,同时可促使树脂体系内分子以2.64 m/s的速度运动,使得酚醛树脂完全浸润炭纤维的时间缩短到3 min,快速促进了树脂在炭布表面的吸附、扩散和渗透,达到两者之间的良好浸润。The composite of carbon cloth / phenolic resin were treated during the process of impregnation by the modification method of continuous interface ultrasound. The appearance and cross section of the prepreg tape both before and after being prepared by ultrasonic have been analysed by metallographic analysis and scanning electron microscope. The results show that the resin has been dipped into fiber without changing the index data of the tape; and then,the infiltration of the tape and its uniformity have been both improved greatly. The impregnation procedure treated by ultrasound has been studied in terms of fluid dynamics and fluid static as well. The results indicate that the cavitation effect and acoustic stream mixing initiated by ultrasound in the phenolic resin system can generate impacting pressure of 2. 29 ×1011Pa in the resin system,impel the molecule of resin system to move at the speed of2. 64 m / s. And then,the period of infiltrating carbon fiber has been decreased to 3 min. Finally,the absorption,proliferation,and infiltration of resin on the carbon cloth surface are accelerated realizing well impregnation between the two ingredients.

关 键 词：超声 炭布/酚醛 浸润性 界面 

分 类 号：V258[一般工业技术—材料科学与工程]