کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5210797 1382917 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High tensibility and pH-responsive swelling of nanocomposite hydrogels containing the positively chargeable 2-(dimethylamino)ethyl methacrylate monomer
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
High tensibility and pH-responsive swelling of nanocomposite hydrogels containing the positively chargeable 2-(dimethylamino)ethyl methacrylate monomer
چکیده انگلیسی
Positively chargeable nanocomposite hydrogels (NC gels) were synthesized by in situ copolymerization of acrylamide (AM) and 2-(dimethylamino)ethyl methacrylate (DMAEMA) in an aqueous suspension of hectorite clay Laponite XLS. The stability of the Laponite suspension containing DMAEMA was monitored by its transmittance, viscosity and zeta potential. The polymerization was initiated either by redox or UV radiation to fabricate the NC gels. Elongation at break and tensile strength decreased with increasing DMAEMA content in monomers up to 17 mol%. As expected from the protonation of DMAEMA, the NC gels containing more than 5 mol% DMAEMA showed pH-responsive swelling; the gels were swollen at pH < 4 and shrunken at pH > 4. In comparison with the redox-initiated NC gels, the UV-initiated NC gels possessed a more homogeneous structure with higher transmittance, better mechanical properties, and a larger equilibrium swelling ratio at pH < 4.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 70, Issue 5, May 2010, Pages 267-271
نویسندگان
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