Morphological evaluation and film formation with iso-oriented calcite crystals using binary poly(acrylic acid)
Morphological evaluation and film formation with iso-oriented calcite crystals using binary poly(acrylic acid)
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DOI：
10.1021/cm049832c
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发表时间：
2004-08-10
影响因子：
8.6
通讯作者：
Imai, H
中科院分区：
文献类型：
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作者：
Kotachi, A;Miura, T;Imai, H
聚丙烯酸（PAA）对方解石晶体形态演化的影响取决于水溶液中聚电解质的浓度和分子量。低分子量PAA （Mw 2000）作为抑制剂对晶体的生长和方解石晶粒的微型化有微弱的抑制作用。高分子量PAA （Mw为90000或250000）作为一种强抑制剂，显著减小了玻璃基板表面的晶粒尺寸，促进了作为模板的薄膜的形成。PAAs性能的差异归因于聚合物链长度引起的迁移率和构象。在二元聚合物体系（Mw为2000和250000）中，将高分子量PAA固定在玻璃衬底上，通过成核制备出由等取向纳米级晶粒组成的菱形薄膜，并用低分子量和高分子量PAAs的混合物控制生长。
The influence of poly(acrylic acid) (PAA) on the morphological evolution of calcite crystals depended on the concentration and molecular weight of the polyelectrolyte in an aqueous solution. A low-molecular-weight PAA (Mw 2000) weakly suppressed the regular crystal growth and miniaturized calcite grains as a suppressant. High-molecular-weight PAA (Mw 90 000 or 250 000) drastically decreased the grain size as a strong suppressant and promoted the formation of thin films as a template on the surface of a glass substrate. The difference in the performance of the PAAs was ascribed to the mobility and conformation derived from the polymer chain length. In a binary polymer system (Mw 2000 and 250 000), lozengeshaped films consisting of iso-oriented nanoscale crystal grains were produced through nucleation with the high-molecular-weight PAA anchored to a glass substrate and controlled growth with the mixture of low- and high-molecular-weight PAAs.