کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
595957 1454030 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multiple crack nucleation in drying nanoparticle-polymer coatings
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Multiple crack nucleation in drying nanoparticle-polymer coatings
چکیده انگلیسی
We performed microscopic, in situ visualizations of spontaneous cracking in drying silica-poly(vinyl alcohol) aqueous suspension coatings. The cracking event was quantified by measuring numbers of nucleation points per unit area from acquired time-lapse video images. Direct imaging revealed that the primary nucleation rate decreases obeying a power-law, whereas the secondary nucleation rate first increases and then decreases with increase in the particle-to-polymer weight ratio. The resultant cross-over between two nucleation rates leads to a drastic morphology transition from isolated star-like cracks to interconnected ladder-like cracks. The maximum crack surface density was obtained at a critical cross-over particle loading.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 342, Issues 1–3, 15 June 2009, Pages 65-69
نویسندگان
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