EFFECTS OF PHOS-b-PMAA ADDITIVE AND pH ON THE FORMATION OF CALCIUM CARBONATE COMPOSITE MICROPARTICLES

被引：0
|
作者：
Mihai, Marcela [1 ]
Mountrichas, Grigoris [2 ]
Pispas, Stergios [2 ]
Simionescu, Bogdan C. [1 ,3 ]
机构：
[1] Romanian Acad, Petru Poni Inst Macromol Chem, 41 A Grigore Ghica Voda Alley, Iasi 700487, Romania
[2] Natl Hellen Res Fdn, Inst Theoret & Phys Chem, 48 Vassileos Constantinou Ave, GR-11635 Athens, Greece
[3] Gh Asachi Tech Univ, Dept Nat & Synthet Polymers, 73 Prof Dimitrie Mangeron St, Iasi 700050, Romania
来源：
REVUE ROUMAINE DE CHIMIE | 2016年 / 61卷 / 8-9期
关键词：
CaCO3; double hydrophilic block-copolymer; pH; growth from solutions; composite microparticles; BLOCK-COPOLYMERS; FABRICATION; TEMPLATES; PARTICLES;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The influence of environmental pH on the crystallization of calcium carbonate microparticles from supersaturated aqueous solutions in the presence of poly(p-hydroxystyrene-b-methacrylic acid) PHOS-b-PMAA, was investigated. The formation of CaCO3/PHOS-b-PMAA microparticles under different polymer concentrations at pH = 12, when both copolymer blocks are ionized, was compared to microparticles preparation at pH = 9.5, when only the PMAA block is ionized. The morphology of the composites was investigated by scanning electron microscopy and atomic force microscopy, and the polymorphs characteristics by X-ray. diffraction and Raman spectroscopy. The particles mean size and circularity was followed by flow particle image analysis and the polymer presence into the composite particles was evidenced by thermogravimetric analysis, particles charge density and zeta potential.
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页码：657 / 663
页数：7
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