Abstract
Acid–base complexes prepared from sub-5 μm polyethyleneimine microballs and dicarboxylic acids promoted silica deposition to give silica microballs with different morphological surface structures which were controlled by the structures of the acids.
Highlights
Silica is one of the major inorganic metal oxides, which is widely used for its designed and structured morphologies for various applications, such as catalytic supports, adsorbents, drug vehicles, coatings and optical materials.[1]
Acid–base complexes formed from sub-5 mm PEImicroballs and dicarboxylic acids such as adipic acid (AA), succinic acid (SA), meso-tartaric acid (m-TA) as well as mucic acid (MA) were used as catalytic templates in silica deposition for understanding the role of the dicarboxylic acids, which complexed with PEI-microballs
We found that changing the structures of dicarboxylic acids could effectively in uence the silica structure formed through PEI-microballs
Summary
Silica is one of the major inorganic metal oxides, which is widely used for its designed and structured morphologies for various applications, such as catalytic supports, adsorbents, drug vehicles, coatings and optical materials.[1]. In order to understand the effect of carboxylic acids on the silica deposition on the restricted micro space of m-PSt-g-PEI, we prepared acid–base complexes by complexation of sub-5 mm microballs of m-PSt-g-PEI with four types of dicarboxylic acids (adipic acid (AA), succinic acid (SA), meso-tartaric acid (m-TA) and mucic acid (MA)) and used them as catalytic templates for silica mineralization via hydrolytic condensation of tetramethoxysilane (TMOS).
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