Abstract
A total of 1/2/4/6-armed molecular architectured polyhedral oligomeric silsesquioxane (POSS) fluoropolymers were synthesized via atom transfer radical polymerization (ATRP) by linear (L), dicephalus (D), four-arm (T), and six-arm (S) initiators initiating same content of methyl methacrylate (MMA), methacrylate POSS (MA-POSS), and dodecafluoroheptyl methacrylate (DFHM). The obtained L/D/T/S-(PMMA-b-PMAPOSS-b-PDFHM)1/2/4/6 had increased molecular weight with arm increase. Driven by the stereo-hindrance and curvature effects of segments in tetrahydrofuran (THF), they assembled into the decreased spherical core-shell micelles (250–100 nm) with arm increase as PMA-POSS/PDFHM core and PMMA shell. Because of easy surface migration of fluorine-containing groups in small micelles, the casted film by S-(PMMA-b-PMAPOSS-b-PDFHM)6 performed the fluorine-rich (46.44%) and rough (5.41 nm) surface, and therefore with the hydrophobic (112°) and low water adsorption surface (1522 ng/cm2). Also, POSS-fluoropolymers obtained the enhanced thermostability with arm increase. It is believed that this research will provide a bright view for design and application of POSS-fluoropolymers.
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Acknowledgments
The authors wish to express their gratitude for the MOE Key Laboratory for Non-equilibrium Condensed Matter and Quantum Engineering of Xi’an Jiaotong University.
Funding
This work has been financially supported by the National Natural Science Foundation of China (NSFC Grants Nos. 51873173 and 51573145) and the National Key Research and Development Project (No. 2019YFC1520504).
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Ma, X., He, L., Huang, S. et al. Effect of different molecular architectured POSS-fluoropolymers on their self-assembled hydrophobic coatings. Colloid Polym Sci 298, 1559–1569 (2020). https://doi.org/10.1007/s00396-020-04739-9
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DOI: https://doi.org/10.1007/s00396-020-04739-9