Yamada Masanori, Uchida Momoka, Yamada Tetsuya
Department of Chemistry, Faculty of Science, Okayama University of Science, Ridaicho, Kita- ku, Okayama, 700-0005, Japan.
Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Sapporo, 060- 8589, Hokkaido, Japan.
Sci Rep. 2025 Mar 18;15(1):9355. doi: 10.1038/s41598-025-92743-w.
Soy protein (SP) is easily obtained from defatted soybeans that have had soybean oil removed. Therefore, the materials consisting of soy protein are not only environmentally benign but also sustainable materials. We prepared the SP - GPTMS composite materials by mixing the SP and a silane coupling reagent, 3-glycidoxypropyltrimethoxysilane (GPTMS), and demonstrated the accumulation of various aldehydes, such as formaldehyde (HAld), acetaldehyde (AcAld), butyl aldehyde (BuAld), and benzaldehyde (BnAld), by the SP - GPTMS composite materials. As a result, when the composite materials were incubated in an aqueous multi-component solution containing four aldehydes, these materials effectively accumulated the aldehydes. The accumulated amounts of the aldehydes were BnAld < BuAld < AcAld < HAld and the amount of HAld was three times higher than that of BnAld, which had the lowest accumulated amount. These results suggested that the SP - GPTMS composite materials indicated a molecular selectivity for HAld. In addition, the accumulated amounts of HAld further increased under acidic conditions. Furthermore, according to the IR measurements, the HAld-accumulated SP - GPTMS composite materials showed the formation of Schiff base bonds. Therefore, the molecular selectivity of HAld in the SP - GPTMS composite material was due to the high electrophilicity of HAld and the low steric hindrance.
大豆蛋白（SP）很容易从已去除大豆油的脱脂大豆中获得。因此，由大豆蛋白组成的材料不仅对环境无害，而且是可持续材料。我们通过将SP与硅烷偶联剂3-缩水甘油氧基丙基三甲氧基硅烷（GPTMS）混合制备了SP-GPTMS复合材料，并证明了该复合材料对各种醛类物质的吸附，如甲醛（HAld）、乙醛（AcAld）、丁醛（BuAld）和苯甲醛（BnAld）。结果，当复合材料在含有四种醛的多组分水溶液中孵育时，这些材料有效地吸附了醛类物质。醛类物质的吸附量顺序为BnAld＜BuAld＜AcAld＜HAld，其中HAld的吸附量比吸附量最低的BnAld高三倍。这些结果表明，SP-GPTMS复合材料对HAld具有分子选择性。此外，在酸性条件下，HAld的吸附量进一步增加。此外，根据红外测量，吸附了HAld的SP-GPTMS复合材料显示出席夫碱键的形成。因此，SP-GPTMS复合材料对HAld的分子选择性是由于HAld的高亲电性和低空间位阻。
