本文将一定量的PMMA、PVAc和碳纳米管在四氢呋喃溶剂中混合,通过超声分散和溶液浇铸工艺制备了碳纳米管/PMMA/PVAc复合膜.研究了在0.4-4.1ppt乙酸乙酯气氛下,碳纳米管/PMMA/PVAc复合膜电阻与气氛浓度的变化关系.研究表明:在0.4-4.1ppt气氛下,碳纳米管/PMMA/PVAc复合膜电阻随着乙酸乙酯气氛浓度的增大而增大,复合膜对乙酸乙酯气氛具有较优的敏感性,且同时随着复合膜中PMMA含量增加,复合膜电阻增加,即气敏性增加.因此,PMMA/PVAC共混物在气敏材料的应用领域上具有潜在的价值.
The solution was prepared by mixing PMMA/PVAc with carbon nanotubes in terahydrofuran (THF). Thin films of carbon nanotube/poly (methyl methacrylate) (PMMA)/poly (vinyl acetate) (PVAc) composite film were produced by solution casting. Electrical resistance responses of carbon nanotube/PMMA/PVAc composite film against various ethyl acetate vapors at low concentrations were investigated. The results indicated that the composites had high sensitivity to different ethyl acetate vapors concentration and the electrical resistance increased with increasing PMMA content. So compatible blends of poly (methyl methacrylate) and poly (vinyl acetate) would be a candidate to be used as a gas sensing material to detect,quantify and discriminate various organic vapors.
参考文献
| [1] | Ji Wen Hu;Shi C;uo Chen et al.Low carbon black filled polyurethane conrposite as candidate for wide spectrum gas-sensing element[J].Material Letter,2004,58:3606-3609. |
| [2] | Valter Bavastrello;Enrico Stura;Sandro Carrara;Victor Erokhin Clandio Nicolini .Poly (2,5-dimethylaniline) -MWNTs nanocompesite:a new material for conductometric acid vapours sensor[J].Sensots and Actuators,2004,1t98:247-253. |
| [3] | Valentini L.;Bavastrello V.;Stura E.;Armentano I.;Nicolini C.;Kenny JM. .Sensors for inorganic vapor detection based on carbon nanotubes and poly(o-anisidine) nanocomposite material[J].Chemical Physics Letters,2004(5-6):617-622. |
| [4] | Marion Wienecke;Mihaela-C. Bunescu;Marlis Pietrzak .PTFE membrane electrodes with increased sensitivity for gas sensor applications[J].Synthetic Metals,2003(1/2):165-171. |
| [5] | S Hosseini;All A Entezami.Preparation and Characterization of Polyaniline Blends with Polyvinylacetate,Polystyren and Polyvinyl chloride for Toxic Gas[J].Polymers for Advanced Technologies,2001:482-493. |
| [6] | Mark C. Lonergan;Erik J. Severin;Brett J. Doleman;Sara A. Beaber;Robert H. Grubbs;Nathan S. Lewis .Array-Based Vapor Sensing Using Chemically Sensitive, Carbon Black-Polymer Resistors[J].Chemistry of Materials,1996(9):2298-2312. |
| [7] | J Chen,N Tsubekava.Novel Gas Sensor from Polymer-Grafted Carben Black:Vapor Response of Electric Resistance of Conducting Composites Prepared from Paly (ethylene-block-ethylene oxide)Grafted Carbon Black[J].J Appl Palym Sci,2000(77):2437-2447. |
| [8] | 张福华,王荣国,赫晓东,张慧玲.碳纳米管/聚合物复合材料及其应用[J].玻璃钢/复合材料,2007(03):52-55. |
| [9] | 汪水平,翁睿,吴志辉.不饱和聚酯树脂/炭黑/碳纤维复合材料的导电性能研究[J].玻璃钢/复合材料,2005(02):20-21. |
| [10] | Xian Ming Dong;Ruo Wen Fu;Ming Qiu Zhang.Electrical resistance response of carbon black filled amorphous polymer composite sensors to organic vapors at low vapor concentration[J].Carben,2004(42):2551-2559. |
| [11] | Brett J. Doleman;Robert D. Sanner;Erik J. Severin .Use of Compatible Polymer Blends To Fabricate Arrays of Carbon Black-Polymer Composite Vapor Detectors[J].Analytical chemistry,1998(13):2560—2564-0. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%