文献类型：期刊文献

英文题名：Biomimetic design of micro- and nano-wrinkle wood surface via coating reinforced with hyperbranched polymer grafted cellulose nanofibers for skin-tactile performance

作者：Liu, Ru[1] Sun, Yuhui[1] Sun, Yingchun[1] Li, Hui[1,2] Chen, Minggui[3] Long, Ling[1] Gong, Jingya[1] Lv, Bin[1] Ni, Yonghao[4]

第一作者：刘如

通信作者：Lv, B[1];Ni, YH[2]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, MOE Key Lab Wooden Mat Sci & Applicat, Qinghua East Rd 35, Beijing 100083, Peoples R China;[3]Jiangsu Himonia Technol Co Ltd, Zhenjiang 212400, Jiangsu, Peoples R China;[4]Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B5A3, Canada

年份：2024

卷号：334

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20241115751723);Scopus(收录号：2-s2.0-85187550336);WOS:【SCI-EXPANDED(收录号:WOS:001218939400001)】；

基金：This study was financially supported by the National Key Research and Development Program (2022YFD2200703) . The authors would like to thank all the reviewers who participated in the review and MJEditor ( www.mjeditor.com ) for its linguistic assistance during the preparation of this manuscript.

语种：英文

外文关键词：Micro and nano wrinkles; Skin-tactile performance; Porous wood; Biomimetic construction; Hyperbranched polymer grafted cellulose; nanofibers

摘要：Inspired from human skin, micro- and nano-wrinkled wood surface with skin-tactile performance was designed and developed using a waterborne UV-curable polyurethane acrylate coating and cellulose nofibers (CNF). To further improve the properties, the CNF was diacetylated to D-CNF and further grafted with a hyperbranched polymer containing rich end amino groups (HB-CNF). The surface structure and chemical reactions were characterized, and the skin-tactile performance of the coating was comprehensively investigated. The HB-CNF exhibited excellent dispersion in the coating, and extensive reactions occurred between the two through the -NH2 and terminal -NCO groups, resulting in much improved mechanical properties and durability. Microwrinkles with a width of approximately 12-15 mu m and a height of 8-14 mu m were created, and nanoprotrusions of wrinkles ranging from to 50-100 nm were obtained. The coated surface was hydrophobic and exhibited high resilience after compression, with a gloss of 3.3 GU at an incident angle of 60 degrees and a static friction coefficient of 0.26, both of which were similar to those of human skin. The results presented an effective strategy for high-performance wood products with a good feeling, which is helpful to improve the market competitiveness and meet the people's pursuit of a better life.