کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
595966 | 1454030 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facile synthesis of elongated calcite superstructure by triblock copolymers with precisely designed block length
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
Calcite crystals elongated along the c-axis and capped by (1Â 0Â 4) rhombohedral faces were grown in the solutions of two kinds of triblock copolymers poly (ethylene glycol)-block-poly (acrylic acid)-block-poly (n-butyl acrylate) (PEG-b-PAA-b-PnBA) with different PAA block length. The copolymer with 3:1 PEG:PAA block ratio facilitates the formation of spindle-shaped calcite elongated along the c-axis and with curved (1Â 0Â 0) or (1Â 1Â 0) prismatic faces. CaCO3 obtained from the copolymer with 6:1 PEG:PAA block ratio exhibits stack-like calcite elongated along the c-axis and with no newly developed faces. The formation of elongated calcite could be due to the aggregation of nanoparticles via an oriented attachment mechanism. The calcite crystals recovered their rhombohedral {1Â 0Â 4} faces gradually with decreasing PAA block length from 3:1 to 6:1 PEG:PAA block ratio, which could be attributed to the weakening of the inhibition efficiency of the PAA block on the non-rhombohedral planes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 342, Issues 1â3, 15 June 2009, Pages 122-126
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 342, Issues 1â3, 15 June 2009, Pages 122-126
نویسندگان
Yunlan Su, Dexiu Wang, Hengrui Yang, Dujin Wang,