Synthesis of poly(methacrylic acid) brushes via surface-initiated atom transfer radical polymerization of sodium methacrylate and their use as substrates for the mineralization of calcium carbonate
Synthesis of poly(methacrylic acid) brushes via surface-initiated atom transfer radical polymerization of sodium methacrylate and their use as substrates for the mineralization of calcium carbonate
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DOI：
10.1021/ma060739e
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发表时间：
2007
期刊：
影响因子：
5.5
通讯作者：
Stefano Tugulu;R. Barbey;M. Harms;M. Fricke;D. Volkmer;A. Rossi;H. Klok
中科院分区：
文献类型：
--
作者：
Stefano Tugulu;R. Barbey;M. Harms;M. Fricke;D. Volkmer;A. Rossi;H. Klok
本文描述了通过甲基丙烯酸钠（NaMA）的表面引发原子转移自由基聚合（SI-ATRP）合成聚甲基丙烯酸（PMAA）刷，并将其用作碳酸钙矿化的底物。在室温条件下，采用cur /CuBr2/联吡啶催化剂体系，可合成厚度达300 nm的电刷。用ATRP引发剂修饰的三甲氧基硅烷和“惰性”戊酰修饰的三甲氧基硅烷的混合物修饰底物引发NaMA的ATRP，可以制备一系列不同链密度的刷。随后的矿化实验表明，低密度刷体促进方解石晶体的形成，而高密度刷体则覆盖了一层薄薄的无定形CaCO3 （ACC）。这是一个有趣的发现，因为ACC可以作为不同晶体CaCO3多晶的亚稳态前体，并为自下而上制造井-de材料提供了有吸引力的前景。
This manuscript describes the synthesis of poly(methacrylic acid) (PMAA) brushes via surface-initiated atom transfer radical polymerization (SI-ATRP) of sodium methacrylate (NaMA) and their use as substrates for the mineralization of calcium carbonate. A CuBr/CuBr2/bipyridine catalyst system in aqueous solution at room temperature allowed the synthesis of brushes with thicknesses of up to 300 nm. Using substrates modified with mixtures of an ATRP-initiator modified trimethoxysilane and an “inert” pivaloyl-modified trimethoxysilane to initiate the ATRP of NaMA, a series of brushes with varying chain density could be prepared. Subsequent mineralization experiments revealed that, while low-density brushes promoted the formation of calcite crystals, high-density brushes were covered with a thin layer of amorphous CaCO3 (ACC). This is of interest because ACC can serve as a metastable precursor for different crystalline CaCO3 polymorphs and offers attractive perspectives for the bottom-up fabrication of well-de...