通过熔融预混合-高温挤出热拉伸-淬冷-低温成型方法制备导电原位微纤化CB/PET/PE材料,CB选择性分布在PET微纤中,微纤相互搭接形成导电网络.将试样浸入二甲苯溶液测试其电性能对有机液体的敏感性,结果表明,原位微纤化CB/PET/PE材料的电阻率迅速升高,相对于普通CB/PE导电复合材料有更高的响应强度,这是由其特殊的微观结构和形态决定的;另外,材料电阻率的变化与其厚度相关,当试样厚度由140μm增加至500μm时,材料的电阻率对二甲苯的敏感程度降低.
The conductive in-situ microfibrillar CB/PET/PE composite was prepared by a new polymer processing method including melt mixing beforehand, extrusion at high temperature, quenching and cold molding. CB aggregates are preferably located in PET and the CB/PET microfibrillar formed a conductive network within the PE matrix. It is found that the in-situ microfibrillar CB/PET/PE displays increasing resistivity upon exposure to the xylene and that the relative resistivity is extremely high, nearby 10~4, attributing to the special internal micro-structure compared with CB/PE composite. Meanwhile, the relative resistivity of CB/PET/PE composite decreases rapidly with the increase of the thickness from 140 μm to 500 μm.
参考文献
| [1] | Severin Erik J. .Relationships among Resonant Frequency Changes on a Coated Quartz Crystal Microbalance, Thichkness Changes, and Resistance Responses of Polymer-Carbon Black Composite Chemiresistors[J].Analytical chemistry,2000(9):2008-2015. |
| [2] | Tillman ES.;Koscho ME.;Grubbs RH.;Lewis NS. .Enhanced sensitivity to and classification of volatile carboxylic acids using arrays of linear poly(ethylenimine)-carbon black composite vapor detectors[J].Analytical chemistry,2003(7):1748-1753. |
| [3] | Chen JH.;Iwata H.;Tsubokawa N.;Maekawa Y.;Yoshida M. .Novel vapor sensor from polymer-grafted carbon black: effects of heat-treatment and gamma-ray radiation-treatment on the response of sensor material in cyclohexane vapor[J].Polymer: The International Journal for the Science and Technology of Polymers,2002(8):2201-2206. |
| [4] | Shi Guo Chen;Ji Wen Hu;Ming Qiu Zhang .Gas sensitivity of carbon black/waterborne polyurethane composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,2004(3):645-651. |
| [5] | Segal E;Tchoudakov R;Mironi-Harpaz I;Narkis M;Siegmann A .Chemical sensing materials based on electrically-conductive immiscible polymer blends[J].Polymer international,2005(7):1065-1075. |
| [6] | Xiang-Bin Xu;Zheng-Ming Li;Ming-Bo Yang .The role of the surface microstructure of the microfibrils in an electrically conductive microfibrillar carbon "black/polyethylene terephthalate)/ polyethylene composite[J].Carbon: An International Journal Sponsored by the American Carbon Society,2005(7):1479-1787. |
| [7] | Xiang-Bin Xu;Zhong-Ming Li;Run-Ze Yu;Ai Lu;Ming-Bo Yang;Rui Huang .Formation of in situ CB/PET Microfibers in CB/PET/PE Composites by Slit Die Extrusion and Hot Stretching[J].Macromolecular materials and engineering,2004(6):568-575. |
| [8] | Doleman BJ;Severin EJ;Lewis NS .Trends in odor intensity for human and electronic noses: relative roles of odorant vapor pressure vs. molecularly specific odorant binding.[J].Proceedings of the National Academy of Sciences of the United States of America,1998(10):5442-5447. |
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