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Updated: Sep 2, 2025

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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Recyclable, UV-Blocking, and Radiative Cooling Multifunctional Composite Membranes.

Shaofeng Liang1, Muqun Wang1, Wei Gao1,2

  • 1School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.

ACS Omega
|August 1, 2022
PubMed
Summary

This study introduces a novel composite membrane for blocking UV radiation and reducing energy consumption. The innovative material offers excellent UV protection and radiative cooling, with high recyclability for sustainable use.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomass Conversion

Background:

  • Ultraviolet (UV) radiation poses significant human health risks.
  • Energy consumption presents challenges for human survival.
  • Biomass-derived materials offer sustainable alternatives for advanced applications.

Purpose of the Study:

  • To develop a composite membrane capable of blocking UV radiation.
  • To engineer a material that reduces energy consumption through radiative cooling.
  • To utilize biomass feedstocks for creating functional membranes.

Main Methods:

  • Preparation of carbon dots (CDs) from xylose and acrylates from epoxidized soybean oil.
  • Fabrication of a two-layer composite membrane using a self-assembly strategy.
  • Characterization of UV-blocking and radiative cooling performance, including recyclability.

Main Results:

  • The composite membrane effectively blocks 99% of UV rays.
  • A significant radiative cooling effect of 4.4 °C was achieved.
  • The membrane demonstrated 95% recovery rate, indicating high recyclability.

Conclusions:

  • The developed composite membrane offers dual functionality: superior UV protection and efficient radiative cooling.
  • Barium sulfate's high electronic band gap contributes to reduced UV absorption.
  • The membrane's sustainable synthesis and recyclability make it suitable for widespread use in high-temperature, high-UV regions.