Size-controlled Nanoparticles of Poly(acrylonitrile-co-methyl methacrylate) for Moisture-absorbing Heat Release Applications
- Authors
- Kim, Young Ho; Lee, Won Seon; Cho, Jae Whan
- Issue Date
- Dec-2011
- Publisher
- KOREAN FIBER SOC
- Keywords
- P(AN-co-MMA); Nanoparticle; Hydrolysis; Heat release; Moisture absorption
- Citation
- FIBERS AND POLYMERS, v.12, no.8, pp.989 - 996
- Journal Title
- FIBERS AND POLYMERS
- Volume
- 12
- Number
- 8
- Start Page
- 989
- End Page
- 996
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/13517
- DOI
- 10.1007/s12221-011-0989-0
- ISSN
- 1229-9197
- Abstract
- Hydrophilic and water-insoluble poly(acrylonitrile-co-methyl methacrylate) [P(AN-co-MMA)] nanoparticles were prepared to investigate their moisture-absorbing heat release effect. The nanoparticle size was controlled by varying the composition of AN and MMA. First, P(AN-co-MMA) nanoparticles were synthesized by emulsion polymerization, followed by cross-linking with hydrazine for water insolubility. Secondly, the hydrazine-cross-linked P(AN-co-MMA) nanoparticles were hydrolyzed in an aqueous NaOH solution to form hydrophilic groups. The hydrolyzed and cross-linked P(AN-co-MMA) [hc-P(AN-co-MMA)] nanoparticles had a more uniform and smaller particle size with increasing MMA content compared to the PAN nanoparticles, this is due to decreasing polar nitrile groups in the P(AN-co-MMA) with MMA content. A nanoparticle size less than 45 nm was obtained for P(AN-co-MMA) with a 20 mol% MMA content. The hc-P(AN-co-MMA) nanoparticles showed a temperature rise maximum of up to 12.9 degrees C in the moisture-absorbing heat release test. In addition, when the nanoparticles with 20 mol % MMA content were coated on cotton fabrics, the temperature of the fabrics increased by up to 7.8 degrees C at 90% relative humidity. This demonstrates that the nanoparticles can be applied as a potential moisture-absorbing heat release material.
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