【摘要】：以酚醛樹脂粘結(jié)短切碳纖維(SCF)并炭化制得碳纖維三維網(wǎng)絡增強體(CFNR),再采用真空袋成型法浸入環(huán)氧樹脂(EP)制得新型EP/CFNR復合材料。通過顯微鏡觀察CFNR和復合材料的微觀結(jié)構(gòu),采用萬能試驗機測試力學性能,以及用電阻儀測定導電性能等方法對復合材料進行了評價。結(jié)果表明,炭化后的酚醛樹脂將SCF粘結(jié)成連續(xù)的三維網(wǎng)絡結(jié)構(gòu),EP/CFNR復合材料中SCF間有明顯可見的炭質(zhì)粘結(jié)點;當SCF質(zhì)量分數(shù)為7.3%時,EP/CFNR復合材料較純EP,EP/SCF復合材料的彎曲強度分別提高33%,29%,壓縮強度分別提高23%,10%,同時,其體積電阻率是EP/SCF復合材料的1/45。
[Abstract]:A new type of EP/CFNR composite material was prepared by carbon fiber three-dimensional network reinforcement (CFNR), which was bonded with phenolic resin and carbonized with short cut carbon fiber (SCF), and then immersed in epoxy resin (EP) by vacuum bag molding. The microstructures of CFNR and composites were observed by microscope. The mechanical properties of the composites were tested by universal testing machine and the electrical conductivity was measured by resistive apparatus. The results show that the carbonized phenolic resin binds SCF into a continuous 3D network structure and there are obvious carbon bond points between SCF and SCF in EP- / CFNR composites. When the mass fraction of SCF is 7.3, the bending strength and compressive strength of EP- / CFNR composite are 3329 and 2310 respectively higher than that of pure EPN / EP/SCF composite respectively, and the volume resistivity of EP- / CFNR composite is 1 / 45 of that of EP/SCF composite.
【作者單位】： 湖南大學材料科學與工程學院;湖南大學汽車車身先進設計與制造國家重點實驗室;
【基金】：湖南大學汽車車身先進設計與制造國家重點實驗室課題
【分類號】：TB332

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