Chen Fei-Fei, Dai Zi-Hao, Feng Ya-Nan, Xiong Zhi-Chao, Zhu Ying-Jie, Yu Yan
Key Laboratory of Advanced Materials Technologies, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, P. R. China.
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China.
ACS Nano. 2021 Mar 23;15(3):5355-5365. doi: 10.1021/acsnano.0c10903. Epub 2021 Feb 25.
Cellulose fiber (CF) paper is a low-cost, sustainable, and flexible substrate, which has gained increasing interest recently. Before practical usage, the functionalization of the pristine CF paper is indispensable to meet requirements of specific applications. Different from conventional surface modification or physical mixing methods, we report growth of ultralong hydroxyapatite nanowires (HAPNWs) with lengths larger than 10 μm on the CF paper. HAPNWs are radially aligned on the surface of CFs, creating a micro/nanoscale hierarchical structure. By means of the excellent ion exchange ability of HAP and the hierarchical structure, the functions of the CF paper can be easily customized. As a proof-of-concept, we demonstrate two kinds of functional CF paper: (1) the photoluminescent CF paper by doping Eu and Tb ions into the crystal lattice of HAPNWs and (2) the superhydrophobic CF paper by coating poly(dimethylsiloxane) on the HAPNW hierarchical structure, which can be applied for self-cleaning and oil/water separation. It is expected that an growth of ultralong HAPNWs will provide an instructive guideline for designing a CF paper with specific functions.
纤维素纤维（CF）纸是一种低成本、可持续且具有柔韧性的基底材料，近来受到越来越多的关注。在实际应用之前，对原始CF纸进行功能化处理对于满足特定应用的要求是必不可少的。与传统的表面改性或物理混合方法不同，我们报道了在CF纸上生长长度大于10μm的超长羟基磷灰石纳米线（HAPNWs）。HAPNWs在CF表面呈径向排列，形成了微/纳米级的分级结构。借助HAP优异的离子交换能力和分级结构，可以轻松定制CF纸的功能。作为概念验证，我们展示了两种功能性CF纸：（1）通过将Eu和Tb离子掺杂到HAPNWs的晶格中制备的光致发光CF纸，以及（2）通过在HAPNW分级结构上涂覆聚二甲基硅氧烷制备的超疏水CF纸，其可用于自清洁和油/水分离。预计超长HAPNWs的生长将为设计具有特定功能的CF纸提供指导方针。
