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Characterization of cellulose II nanoparticles regenerated from 1-butyl-3-methylimidazolium chloride
- Jingquan Han, Chengjun Zhou, Alfred D. French, Guangping Han, Qinglin Wu
- Carbohydrate polymers 2013 v.94 no.2 pp. 773-781
- cellulose, cellulosic fibers, chlorides, cotton, crystal structure, homogenization, imidazoles, nanoparticles, pyrolysis
- Regenerated cellulose nanoparticles (RCNs) including both elongated fiber and spherical structures were prepared from microcrystalline cellulose (MCC) and cotton using 1-butyl-3-methylimidazolium chloride followed by high-pressure homogenization. The crystalline structure of RCNs was cellulose II in contrast to the cellulose I form of the starting materials. Also, the RCNs have decreased crystallinity and crystallite size. The elongated RCNs produced from cotton and MCC had average lengths of 123±34 and 112±42nm, and mean widths of 12±5 and 12±3nm, respectively. The average diameter of spherical RCNs from MCC was 118±32nm. The dimensions of the various RCNs were all well fitted with an asymmetrical log-normal distribution function. The RCN has a two-step pyrolysis, different from raw MCC and cotton that have a one-step process.