Surface Modification of Titanium Dioxide on  Cellulose Acetate/Hydroxyapatite Composite Membrane

doi:10.16552/j.cnki.issn1001-1625.2025.0018

Abstract

Abstract: The modification of organic membranes with inorganic nanoparticles has always been a research hotspot. Polydopamine (PDA) can be used to increase the adhesion of titanium dioxide (TiO₂) on cellulose acetate/hydroxyapatite (CA/HA) composite membranes. In this study, the effects of PDA polymerization time and TiO₂ concentration on membrane structure, hydrophilicity, permeability, mechanical properties, as well as the pollution resistance and photocatalytic performance of composite membrane were investigated. The research results indicate that the introduction of PDA and TiO₂ improves the hydrophilicity of the membrane surface, and significantly increases membrane retention. With the increase of PDA polymerization time, the tensile strength of composite membranes increases first and then decreases. TiO₂ endows the membrane with photocatalytic performance, improves membrane regeneration performance of organic membranes. The composite membrane exhibites high flux recovery rate and excellent pollution resistance with the PDA polymerization time of 6 h and TiO₂ concentration of 0.1% (mass fraction).

Key words: cellulose acetate/hydroxyapatite composite membrane, TiO₂ nanoparticle, photocatalytic, wettability, pollution resistance

CLC Number:

TQ028

LIU Jiaxin, LIU Li, WANG Shuang, ZHANG Shisheng, ZHU Qingxia. Surface Modification of Titanium Dioxide on Cellulose Acetate/Hydroxyapatite Composite Membrane[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(8): 3079-3087.

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Surface Modification of Titanium Dioxide on Cellulose Acetate/Hydroxyapatite Composite Membrane

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