期刊
POLYMER
卷 223, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2021.123615
关键词
Multi-walled carbon nanotubes; Thermal stability; Polyurethane; Conductivity; Pressure-sensitive adhesives
资金
- National Key R&D Program of China [2017YFD0601003]
- Guangdong Natural Science Foundation of China [2018A030313895]
- Guangzhou Science and Technology Planning Project of China [202002030305]
- Regional key project of the Science and Technology Services Network Program (STS) of the CAS [KFJ-STS-QYZX-089]
By modifying multi-walled carbon nanotubes (CNTs) with polydopamine (PDA), self-adhesive and heat-resistant conductive adhesives were successfully prepared, significantly improving conductivity and thermal stability. Under certain conditions, the conductivity and heat resistance were greatly enhanced.
The conductivity and thermal stability of traditional polymers are generally not ideal, consequently endowing polymer-based pressure-sensitive adhesives (PSAs) with certain conductivity and heat resistance has become a popular design idea. Although multi-walled carbon nanotubes (CNTs) possess good electrical conductivity and thermal stability, their adhesion to the substrate is poor. Inspired by mussel chemistry, polydopamine (PDA) is adopted to modify CNTs to improve their adhesion to substrates. Eventually, polydopamine-modified multiwalled carbon nanotubes (PDA-CNTs) are added into the polyurethane/polysiloxane matrix, and a series of selfadhesive and heat-resistant conductive adhesives are successfully prepared under UV irradiation. As a result, the conductivity and thermal stability of PSAs are refined as expected. Especially when the content of PDA-CNTs is 4 wt%, the conductivity reaches 1.2 ? 10-5 S/cm. Comparing to pure polymer (PUA), the conductivity of PUATS4 is increased by six orders of magnitude. In addition, its heat resistance is also improved, and the carbon residue rate is up to 14.5 wt% at 750 ?C. These excellent performances of PSAs will be beneficial to the applications in conductivity and thermal stability in the future.
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