Nanoporous structures generated from micro‐phase separation of block copolymers (BCPs) have been used as templates for fabrication of inorganic materials through atomic layer deposition (ALD), chemical vapor deposition, sol‐gel process, and electrodeposition. However, the previous deposition methods are suffering from unmanageable preparation conditions and demanding technical requirements. In this work, bioinspired synthesis was used as replicating technique to fabricate silica porous membrane on swelling‐induced polystyrene‐block‐poly (2‐vinyl pyridine) (PS‐b‐P2VP) membrane with bicontinuous nanopores. It was found that silica nanoporous membranes were successfully obtained on PS‐b‐P2VP under benign conditions (near‐neutral pH, low temperature, and ambient pressure) from tetraethoxysilane (TEOS). Moreover, the thickness of silica films could be regulated by the amount of water in the TEOS solution. The mechanism could be inferred that pyridine groups in P2VP domains can act as a catalyst for the insertion and polymerization reactions of silanol from hydrolysis of TEOS to form silica due to the hydrogen bonding between pyridine groups and Si‐OH in silanol. The proposed method offers a facile and controllable synthesis strategy to fabricate nanoporous silica membrane.

中文翻译：

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通过多孔嵌段共聚物的表面诱导冷凝法制备二氧化硅膜

嵌段共聚物（BCP）的微相分离产生的纳米孔结构已被用作通过原子层沉积（ALD），化学气相沉积，溶胶-凝胶工艺和电沉积制备无机材料的模板。然而，先前的沉积方法遭受难以控制的制备条件和苛刻的技术要求。在这项工作中，采用生物启发性合成作为复制技术，在具有双连续纳米孔的溶胀诱导的聚苯乙烯嵌段聚（2-乙烯基吡啶）（PS-b-P2VP）膜上制备二氧化硅多孔膜。发现在良性条件下（接近中性pH，低温和环境压力），由四乙氧基硅烷（TEOS）在PS-b-P2VP上成功获得了二氧化硅纳米多孔膜。而且，二氧化硅膜的厚度可以通过TEOS溶液中的水量来调节。可以推测其机理是，P2VP结构域中的吡啶基团可以充当硅烷醇的插入和聚合反应的催化剂，因为硅烷醇中吡啶基团和Si-OH之间存在氢键，从而使TEOS水解而形成二氧化硅。所提出的方法提供了一种容易且可控的合成策略来制备纳米多孔二氧化硅膜。