高校化学工程学报Issue(4)：825-829,5.DOI:10.3969/j.issn.1003-9015.2014.04.021
聚乙二醇/碳纳米管复合多孔凝胶的合成与表征
Synthesis and Characterization of Porous Poly(ethylene glycol)/Carbon Nanotube Hydrogels
任英 1吴晶军 1周其云1
作者信息
- 1. 化学工程联合国家重点实验室 浙江大学，浙江大学 化学工程与生物工程学系，浙江 杭州 310027
- 折叠
摘要
Abstract
A unidirectional freezing technique was combined with cryopolymerization to prepare poly (ethylene glycol) (PEG) hydrogels with aligned porous structure. Freeze-dried samples were immersed in aqueous carbon nanotube (CNTs) dispersions. CNTs diffused into the pores of the hydrogel, and deposited onto the inner walls of the pores. Introducing a cationic moiety, (3-Acrylamidopropyl)trimethylammonium Chloride (AAPTAC) into the hydrogel by copolymerizing with PEGDA can enhance the deposition of CNTs, as electrostatic force together with van der Waals force improves the interreaction between CNTs and PEG. Therefore, the porous PEG hydrogels prepared are coated with a dense and compact CNTs layer. The obtained composite hydrogels possess good electrical conductivity, which is up to 1.5×10-1 S⋅m-1 in dry state. While the conductivity of the samples prepared by in situ polymerization is 3 magnitudes lower (2.7×10-4 S⋅m-1). The conductivity of the sample prepared using the same surface-deposition method but without a cationic moiety is as low as 2.9×10-4 S⋅m-1 because of less absorption of CNTs.关键词
多孔凝胶/碳纳米管/沉积/电导率Key words
porous PEG hydrogel/carbon nanotubes/composite/conductivity分类
化学化工引用本文复制引用
任英,吴晶军,周其云..聚乙二醇/碳纳米管复合多孔凝胶的合成与表征[J].高校化学工程学报,2014,(4):825-829,5.
