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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
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 1â3, 15 June 2009, Pages 65-69
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 342, Issues 1â3, 15 June 2009, Pages 65-69
نویسندگان
Masato Yamamura, Hiromi Ono, Tetsuro Uchinomiya, Yoshihide Mawatari, Hiroyuki Kage,