中文摘要：

单宁酸（Tannic acid，TA）是一种天然植物多元酚，广泛分布于各类植物的根、茎、叶及果实中，具有价格低廉、来源广泛、生物相容性好等特点。单宁酸分子内含有大量酚羟基和酯基活性官能团，具有高化学反应活性。由于其特殊的分子结构——大量疏水芳香环和亲水酚羟基的存在，单宁酸还易与各种分子或基团形成氢键、静电、疏水和“一”堆叠等多种相互作用，在功能材料领域应用广泛。本文总结了近年来单宁酸在功能材料领域应用的研究进展，其中主要包括贵金属纳米材料制备、表界面功能化改性、功能微胶囊构筑和自组装材料制备等，并对基于单宁酸功能材料的研究前景进行了展望。

英文摘要：

Tannic acid（TA）is one of the plant polyphenolic compounds which can be widely found in plant roots, stems, leaves and fruits. TA belongs to the family of hydrolysable tannins and has many advantages such as low cost, wide source, good biocompatibility and so on. With abundant hydroxyl groups and ester groups TA possesses high chemical reactivity. Due to the special molecular structure-the hydrophobic planar aromatic nucleus and the hydrophilic hydroxy substituent, TA can interact with the various groups and molecules to form hydrogen bonds, hydrophobic interactions, electrostatic interactions and n stacking （van der Waals） interactions. Over the past few years, TA has been widely applied in functional materials. In this paper, the latest developments on TA-based functional materials, involved with metal nanomaterials, surface modification, microcapsules and self-assembly materials are reviewed. Besides, the outlook for future potentials of TA-based functional materials is proposed in the end of this review.