Inorganic Chemicals Industry ›› 2024, Vol. 56 ›› Issue (5): 45-52.doi: 10.19964/j.issn.1006-4990.2023-0341

• Research & Development • Previous Articles     Next Articles

Preparation of porous superhydrophobic SiO2/PDMS sponge by template method and application of oil water separation

LIU Junyi1(), FENG Qingge1,4(), CHEN Kao2,3(), LI Xiang3, QIN Fanghong3, HUANG Xiaoxiao1, FENG Lin1   

  1. 1.School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China
    2.School of Materials and Environment,Guangxi Minzu University,Guangxi Colleges and Universities Key Laboratory of Environmental-friendly Materials and Ecological Remediation,Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization,Nanning 530006,China
    3.School of Civil Engineering,Guangxi University,Nanning 530004,China
    4.State Key Laboratory for Life cycle Safety of Characteristic Metal Materials and Composite Structures jointly built by the provincial and ministerial departments(Guangxi University),Nanning 530004,China
  • Received:2023-06-25 Online:2024-05-10 Published:2024-05-15
  • Contact: FENG Qingge, CHEN Kao E-mail:867392491@qq.com;fengqg@gxu.edu.cn;ck@gxmzu.edu.cn

Abstract:

Superhydrophobic SiO2 aerogel was prepared by sol-gel method using water glass as silicon source.The superhydrophobic SiO2 aerogel gel was uniformly mixed with polydimethylsiloxane(PDMS),sucrose and glucose were introduced as templates to prepare superhydrophobic SiO2/PDMS sponge.The microstructure and composition were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),etc.Its wetting performance was characterized by contact angle measuring instrument.With oil-water mixture as model pollutant,the effects of SiO2 aerogel content and sugar proportion on adsorption properties of sponge were studied.The results showed that the SiO2/PDMS sponge had superhydrophobic and lipophilic properties,with a water contact angle(WCA) of 152.1°.It revealed good removal effect in simulated oil-water adsorption experiments,with removal rate of 98% and 95% for vegetable oil and pump oil,respectively.After oil-water separation experiments repeated for 20 times,adsorption capacity and contact angle of SiO2 /PDMS sponge did not change significantly,and still showed good hydrophobic performance.

Key words: SiO2 aerogels, PDMS, sponge, template method, oil-water separation

CLC Number: