碳纖維/納米碳黑水泥基材料力學(xué)性能與微觀結(jié)構(gòu)對(duì)比研究
王玉林1，趙曉華2，杜建華3，王金華1
- 摘 要
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(1 武夷學(xué)院，武夷山 354300；2 汕頭大學(xué)，汕頭 515063；3 石家莊鐵路職業(yè)技術(shù)學(xué)院，石家莊 050041)[摘要] 對(duì)單摻和混摻納米碳黑（Nanometer Carbon Black，NCB）、碳纖維（Carbon Fiber，CF）的水泥基復(fù)合材料的力學(xué)性能進(jìn)行了試驗(yàn)對(duì)比，發(fā)現(xiàn)適量摻入納米碳黑可以明顯提高水泥基復(fù)合材料的抗折和抗壓強(qiáng)度，并且效果比單獨(dú)摻入碳纖維和混摻納米碳黑和碳纖維更為明顯。借助掃描電子顯微鏡和壓汞試驗(yàn)對(duì)水泥基復(fù)合材料微觀結(jié)構(gòu)和孔隙情況進(jìn)行了分析。結(jié)果表明：納米碳黑比碳纖維更容易均勻地分散在水泥基材料中，與水泥基材料結(jié)合更為緊密，并且納米碳黑顆粒小于有害孔的孔徑，能夠有效填充孔隙，進(jìn)而減小材料的孔隙率和微觀缺陷，改善材料的微觀結(jié)構(gòu)，使材料結(jié)構(gòu)更加致密。[關(guān)鍵詞] 微觀分析; 壓汞試驗(yàn); 力學(xué)性能; 納米碳黑; 碳纖維中圖分類號(hào)：TU522.07 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：1002-848X(2013)S2-0584-05基金項(xiàng)目：福建省自然科學(xué)基金項(xiàng)目（2012J05096），福建南平市科技項(xiàng)目（N2010Z10（9）），武夷學(xué)院青年項(xiàng)目（Xq201018）。作者簡(jiǎn)介：王玉林，博士，副教授，Email：ylwang513@163.com。Wang Yulin1, Zhao Xiaohua2, Du Jianhua, Wang Jinhua1(1 Wuyi University, Wuyi Shan 354300,China; 2 Shantou University, Shantou 515063,China; 3 Shijiazhuang Railway Vocation Technique College, Shijiazhuang 050041,China)Abstract:The properties of cement-based composites, with nano-sized carbon black and carbon fiber, have been studied by compared experiments. Tests showed that proper addition of nano-sized carbon black can apparently improve both compressive strength and flexural strength, and nano-sized carbon black are more effective in mechanical improvement than carbon fiber only or mix of nano-sized carbon black and carbon fiber. The techniques of scanning electron microscope and mercury injection are adopted to analyze the microstructure and porous condition of cement-based composites. Results show that: nano-sized carbon black is easier to be dispersed into cement matrix and well bonds with the later, what’s more, because of the size nano-sized carbon smaller than that of harmful pores, it can effectively reduce the porosity and microdefects as fillers to improve material microstructure and make material denser.Keywords: micro-analysis; mercury injection experiment; mechanical properties; nano-sized carbon back; carbon fiber
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