کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
692363 1460518 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of waterborne self-cleaning nanocomposite coatings based on TiO2/PMMA latex
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Preparation of waterborne self-cleaning nanocomposite coatings based on TiO2/PMMA latex
چکیده انگلیسی


• TiO2@PMMA core/shell latex was synthesized using miniemulsion polymerization.
• Waterborne self-cleaning coating was made from TiO2@PMMA latex and modified silica.
• The coating was fast to attain superhydrophilic surface under UV-irradiation.
• The coatings are excellent in photocatalytic activity, durability, and transparency.

Titania/poly(methyl methacrylate) core/shell (TiO2/PMMA) latex was synthesized by miniemulsion polymerization and further mixed with modified colloidal silica to create waterborne nanocomposite coatings (M-SiO2/TiO2/PMMA). The coatings were undergone accelerated weathering tests and their surface wettability, transparency, and morphology were monitored as a function of weathering time. Superhydrophilic surfaces were attained after 27–34 h aging, being attributed to the unique distribution of TiO2 nanoparticles in PMMA phase. In contrast to the coating based on the mixture of M-SiO2, TiO2 nanoparticles, and PMMA latex, this time is quite short and absolutely benefit for their outdoor application. Due to the degradation of organic matrix, transparency reduction and film thickness loss of coatings took place in weathering tests. Nevertheless, these undesired evolutions can be alleviated by decreasing film thickness or using adequate quantity of TiO2/PMMA latex. Photodegradation experiments of methyl blue indicate that the formed superhydrophilic coatings are excellent in self-cleaning performance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 85, August 2015, Pages 208–215
نویسندگان
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