Abstract
Recently, a heterocoagulation process has been emerged as a new technique to prepare polymer/nano-filler composites in water. Conventionally, heterocoagulation has been utilized only for as-prepared emulsion latex. However, we aimed to extend heterocoagulation process in order to use commercial polymer resin. Bulk PMMA resin was dissolved in a solvent and precipitated in SDS aqueous solution to make a stable colloid system. After removing the solvent, the PMMA dispersion was mixed with CTAB-stabilized MWCNT dispersion. A heterocoagulation process was conducted at room temperature. Upon the completion of the heterocoagulation, all MWCNTs were embedded into PMMA matrix. Experimental results show that MWCNTs were uniformly distributed in PMMA and their thermal stability was significantly improved. More importantly, the percolation threshold for the electrical conductivity was achieved at a low concentration (1 wt %) of MWCNT using this heterocoagulation process.
| Original language | English |
|---|---|
| Pages (from-to) | 1574-1581 |
| Number of pages | 8 |
| Journal | Journal of Dispersion Science and Technology |
| Volume | 32 |
| Issue number | 11 |
| DOIs | |
| State | Published - 2011 |
Bibliographical note
Funding Information:Received 14 July 2010; accepted 15 August 2010. This work was supported by the Regional Innovation Center for Environmental Technology of Thermal Plasma (ETTP) at Inha University designated by MKE. Address correspondence to Sang Eun Shim, Department of Chemical Engineering, Inha University, 253 Yonghyundong, Namgu, Incheon, Korea 402-751. E-mail: [email protected]
Keywords
- Carbon nanotube
- Colloid
- Electrical conductivity
- Heterocoagulation
- PMMA