کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5189499 1381186 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of smart core-shell polymer in supercritical carbon dioxide
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis of smart core-shell polymer in supercritical carbon dioxide
چکیده انگلیسی
Herein we report a new and simple method that has been developed to prepare smart polymeric microgels consisting of temperature-sensitive cores with pH-sensitive shells. The microgels were obtained directly from one step seed polymerization of N-isopropylacrylamide and N,N-methylenebisacrylamide from water-soluble biopolymers containing carboxymethyl groups in supercritical carbon dioxide. The effect of initial concentration of initiator, crosslinker, and carboxymethyl starch (CMS) dose as well as reaction pressures on the yield and morphology of the resulting polymer were investigated. CMS and crosslinker worked effectively as surfactant to some extent. PNIPAM/CMS particles with diameters in 100 nm and narrow particle size distribution were produced in supercritical carbon dioxide, in high yield and in short reaction times.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 47, Issue 13, 14 June 2006, Pages 4588-4595
نویسندگان
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