Thermoresponsive poly(poly(ethylene glycol) methylacrylate)s grafted cellulose nanocrystals through SI-ATRP polymerization |
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| Authors: | Xiuqiang Zhang Jinlong Zhang Lili Dong Suxia Ren Qinglin Wu Tingzhou Lei |
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| Institution: | 1.Key Biomass Energy Laboratory of Henan Province,Zhengzhou,China;2.School of Renewable Natural Resources,Louisiana State University,Baton Rouge,USA |
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| Abstract: | We report a series of thermoresponsive cellulose nanocrystals (CNCs) decorated with poly(poly(ethylene glycol) methylacrylate) copolymers (poly(PEGMA)-g-CNCs) synthesized by surface initiated-atom transfer radical polymerization (SI-ATRP). The chemical structures and surface morphologies were subsequently confirmed by FT-IR, XPS, and AFM measurements. With regard to thermally responsive behavior, poly(PEGMA)-g-CNCs show tunable lower critical solution temperature (LCST) values in the range of 34–66 °C by varying the feeding ratios of comonomers. The reversible morphological transformation from individual nano-rod structures to larger globule aggregates was further verified by AFM during the LCST transition. These functionalized CNCs have potential as smart film filters and biosensors. |
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