Abstract：
Mussel-inspired polydopamine (PDA) coating has been utilized extensively as versatile deposition strategies that can functionalize surfaces of virtually all substrates. However, the strong adhesion, stability and intermolecular interaction of PDA make it inefficient in certain applications. Herein, a green and efficient photocatalytic method was reported to remove adhesion and degrade PDA by using TiO2-H2O2 as photocatalyst. The photodegradation process of the PDA spheres was first undergone nanoscale disassembly to form soluble PDA oligomers or well-dispersed nanoparticles. Most of the disassembled PDA can be photodegraded and finally mineralized to CO2 and H2O. Various PDA coated templates and PDA hollow structures can be photodegraded by this strategy. Such process provides a practical strategy for constructing the patterned and gradient surfaces by the \"top-down\" method under the control of light scope and intensity. This sequential degradation strategy is beneficial to achieve the decomposition of highly crosslinked polymers.
摘要：
贻贝启发的聚多巴胺（PDA）涂层已被广泛用作通用的沉积策略，可以使几乎所有基材的表面功能化。然而,强附着力，PDA的稳定性和分子间相互作用使其在某些应用中效率低下。在这里，报道了一种绿色高效的光催化方法，该方法通过使用TiO2-H2O2作为光催化剂来去除粘附和降解PDA。PDA球体的光降解过程首先经历纳米级分解以形成可溶性PDA低聚物或分散良好的纳米颗粒。大多数拆卸的PDA可以光降解并最终矿化为CO2和H2O。通过这种策略可以光降解各种PDA涂覆的模板和PDA中空结构。这样的过程提供了一种实用的策略，用于在光范围和强度的控制下通过“自上而下”方法构建图案化和梯度表面。这种顺序降解策略有利于实现高度交联聚合物的分解。
