文献类型：期刊文献

英文题名：Preparation and Mechanical Properties of Polyurethane-Based Negative Poisson's Ratio Composites for Sports Protection Applications

作者：Yi, Hongling[1];Tang, Yehuan[1];Lin, Heng[1];Gong, Weiguang[1];Wei, Ting[2]

机构：[1]East China Univ Sci & Technol, Sch Sports Sci & Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：64

期号：15

起止页码：2406

外文期刊名：POLYMER-PLASTICS TECHNOLOGY AND MATERIALS

收录：;EI(收录号：20253218942704);WOS:【SCI-EXPANDED(收录号:WOS:001543887800001)】；

语种：英文

外文关键词：3D printed polyamide skeleton; energy absorption; negative Poisson's ratio composites; polyurethane foams; surface modification

摘要：This study aims to enhance the protective performance of sports gear by developing polyurethane-based negative Poisson's ratio (NPR) composites integrating 3D-printed polyamide honeycomb skeletons and polyurethane foams. Finite-element modeling (FEM) was first used to optimize honeycomb geometry, determining that a 60 degrees cell concave angle with 2 mm wall thickness yields a robust NPR structure. Quasi-static compression and dynamic impact tests then investigated the effects of wall thickness and surface treatment on mechanical properties of NPR composites, prepared by infiltrating surface-modified honeycombs with polyurethane microcellular elastomer. X-ray photoelectron spectroscopy (XPS) and peel tests showed gamma-aminopropyltriethoxysilane (KH550) treatment enhanced the interfacial peel strength by 194%. Compared to bare honeycombs, the NPR composites exhibited 129% higher energy absorption (EA) and 107% higher specific energy absorption (SEA). Thicker walls correlated with superior energy absorption and impact resistance, validating their potential for sports protection. This work provides design insights for 3D-printed NPR honeycomb composites in protective gear.