Fabrication and Study of Antibacterial/Antireflective Dual-functional Thin Films from Quaternary Ammonium Salt Modified Hollow Silica Nanospheres

doi:10.6023/A18050201

Acta Chim. Sinica ›› 2018, Vol. 76 ›› Issue (10): 807-812.DOI: 10.6023/A18050201 Previous Articles

Article

基于季铵盐改性SiO₂空心球的抗菌/减反增透双功能薄膜的制备和研究

王凯凯^a,b, 贺军辉^a

a 中国科学院理化技术研究所功能纳米材料实验室北京 100190;
b 中国科学院大学北京 100049

投稿日期:2018-05-15 发布日期:2018-08-13
通讯作者: 贺军辉 E-mail:jhhe@mail.ipc.ac.cn
基金资助:
项目受国家自然科学基金（No.21571182）、国家重点研发计划（No.2017YFA0207102）和北京市科学技术委员会（No.Z151100003315018）资助.

Fabrication and Study of Antibacterial/Antireflective Dual-functional Thin Films from Quaternary Ammonium Salt Modified Hollow Silica Nanospheres

Wang Kaikai^a,b, He Junhui^a

a Functional Nanomaterials Laboratory, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190;
b University of Chinese Academy of Sciences, Beijing 100049

Received:2018-05-15 Published:2018-08-13
Contact: 10.6023/A18050201 E-mail:jhhe@mail.ipc.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (No. 21571182), the National Key Research and Development Program of China (No. 2017YFA0207102) and the Science and Technology Commission of Beijing Municipality (No. Z151100003315018).

1. Fabrication and Study of Antibacterial/Antireflective Dual-functional Thin Films from Quaternary Ammonium Salt Modified Hollow Silica Nanospheres.PDF(615KB)

Abstract

Dual-functional thin films simultaneously demonstrating antireflective and antibacterial properties have important practical values in the fields of medicine and health. Unfortunately, related studies have so far been very limited. This work chose a quaternary ammonium salt with the longest carbon chain of C₁₈ as antibacterial agent, and used it to modify an acid-catalyzed silica sol via chemical bonding. The obtained quaternary ammonium salt modified acid-catalyzed silica sol (Q-ASNs) was subsequently mixed with a hollow silica nanospheres sol (HSNs) followed by stirring for 6 h to obtain a mixed sol. The volume percentage of Q-ASNs was varied as 3.1%, 4.9%, 6.7%, and 8.4%, respectively. In detail, Q-ASNs were synthesized as follows:1 mL tetraethyl orthosilicate (TEOS), 0.6 mL quaternary ammonium salt methanol solution (65 wt%), 13.6 mL ethanol, 0.45 mL water and 21 μL HCl were mixed followed by stirring at room temperature for 4 h and aging for at least one day. HSNs were prepared according to the following procedure:0.1 g poly(acrylic acid) (PAA) was dissolved in 4.5 mL ammonium hydroxide, and then it was mixed with 90 mL absolute ethanol under stirring. This was followed by the injection of 800 μL TEOS under vigorous magnetic stirring at room temperature in 40 min. After 10 h, a HSNs sol containing~30 nm hollow silica nanospheres formed. Before mixing Q-ASNs and HSNs, the HSNs were stirred in a ventilating cabinet for more than 24 h to remove ammonia. Antireflective/antibacterial dual-functional thin films were fabricated by dip-coating from the mixed sol of Q-ASNs and HSNs. The optical properties of the films were optimized by regulating the mixing ratio of the above-mentioned two sols. The optimal thin film coated glass substrate presented high transmittance (T_max=99.2%, T_ave=98.6%) in the visible wavelength range of 400~800 nm. The HSNs and the mixed sol were observed by transmission electron microscopy. The fabricated thin films were characterized by scanning electron microscopy, atomic force microscopy, transmission/reflection spectroscopy, X-ray photoelectron spectroscopy, and confocal laser scanning microscopy using a live/dead reagent. The current method is simple and easy for large-area coating without any high-temperature heat treatment, and is thus promising for practical applications.

Key words: antireflective, antibacterial, quaternary ammonium salt, hollow silica nanospheres, thin film

Cite this article

Wang Kaikai, He Junhui. Fabrication and Study of Antibacterial/Antireflective Dual-functional Thin Films from Quaternary Ammonium Salt Modified Hollow Silica Nanospheres[J]. Acta Chim. Sinica, 2018, 76(10): 807-812.

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基于季铵盐改性SiO₂空心球的抗菌/减反增透双功能薄膜的制备和研究

Fabrication and Study of Antibacterial/Antireflective Dual-functional Thin Films from Quaternary Ammonium Salt Modified Hollow Silica Nanospheres

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Fabrication and Study of Antibacterial/Antireflective Dual-functional Thin Films from Quaternary Ammonium Salt Modified Hollow Silica Nanospheres

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Abstract

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基于季铵盐改性SiO₂空心球的抗菌/减反增透双功能薄膜的制备和研究