Facile in-situ growth of Ag-TiO2 nanoparticles on polydopamine modified bamboo with excellent mildew-proofing
J Hu, Z Lu, G Liu, S Chang, Y Liu, X Li
Bamboo with good mechanical properties, fast growth rate and low growth cost is one of very utilitarian structural material from forest resources only less important than wood. But it is especially easy to mildew during outdoor service resulting in appearance mould scattering and corrosion. In this work, a facile method was developed to increased mildew-proofinging capability of bamboo. Mussel-inspired polydopamine (PDA) chemistry was used to prepare stable and uniform coatings on bamboo surfaces with highly active functional groups, then Ag and TiO2 nanoparticles could be in-situ grown and immobilized onto bamboo surfaces via these highly active functional groups. Integrating uniform polydopamine coating, photocatalytic function of TiO2 nanoparticle and bactericidal action of Ag nanoparticle, the mildew-proofinging capability of bamboo could be improved significantly. The results show that PDA modified bamboo was mainly covered with Ag and TiO2 nanoparticles. Meanwhile, the Ag and TiO2 nanoparticles loaded bamboo maintained the natural color, texture and structure, and improved its mildew-proofinging property.