Wang Fei, Dai Jianwu, Huang Liqian, Si Yang, Yu Jianyong, Ding Bin
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China.
Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China.
ACS Nano. 2020 Jul 28;14(7):8975-8984. doi: 10.1021/acsnano.0c03793. Epub 2020 Jul 13.
Disinfecting drinking water in a reliable, sustainable, and affordable manner is a great challenge, especially for water contaminated with pathogenic microbes, and traditional water disinfection strategies still suffer from biofouling, irreversible depletion of disinfectants, and energy consumption. In this study, we developed biomimetic and superelastic skeletal-structured silica nanofibrous aerogels (SNAs) with rechargeable bactericidal and antifouling property via the combination of electrospun silica nanofibers and a functional Si-O-Si bonding network. The premise for our design is that the Si-O-Si network comprising rechargeable -halamine moieties can provide the aerogels with structural stability yet durable bactericidal activity. The resulting aerogels exhibit intriguing properties of high porosity, superhydrophilicity, superelasticity, rechargeable chlorination capability (>4800 ppm), and exceptional bactericidal activity (99.9999%), enabling the aerogels to effectively disinfect the bacteria-contaminated water with ultrahigh flux (57 600 L m h) and antifouling function. The synthesis of the SNAs opens pathways for exploring antibacterial and antifouling materials in a renewable and nanofibrous form.
以可靠、可持续且经济实惠的方式对饮用水进行消毒是一项巨大挑战，尤其是对于被致病微生物污染的水而言，传统的水消毒策略仍面临生物污垢、消毒剂不可逆转的消耗以及能源消耗等问题。在本研究中，我们通过将静电纺丝二氧化硅纳米纤维与功能性Si - O - Si键合网络相结合，开发出了具有可再充电杀菌和防污性能的仿生超弹性骨架结构二氧化硅纳米纤维气凝胶（SNA）。我们设计的前提是，包含可再充电卤胺基团的Si - O - Si网络能够为气凝胶提供结构稳定性以及持久的杀菌活性。所得到的气凝胶具有高孔隙率、超亲水性、超弹性、可再充电氯化能力（>4800 ppm）以及出色的杀菌活性（99.9999%）等有趣特性，使气凝胶能够以超高通量（57600 L m⁻² h⁻¹）有效地对细菌污染的水进行消毒并具备防污功能。SNA的合成开辟了探索可再生纳米纤维形式的抗菌和防污材料的途径。
