增材制造的聚氨酯（PU）/埃洛石纳米管（HNT）纳米复合材料的机械性能和形状记忆性能

Mechanical and Shape Memory Properties of Additively Manufactured Polyurethane (PU)/Halloysite Nanotube (HNT) Nanocomposites.

作者信息

Nugroho Wendy Triadji, Dong Yu, Pramanik Alokesh

机构信息

School of Civil and Mechanical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia.

Engineering Department, Politeknik Negeri Jember, GPO Box 164, Jember 68101, Indonesia.

出版信息

Nanomaterials (Basel). 2024 Aug 22;14(16):1373. doi: 10.3390/nano14161373.

DOI:10.3390/nano14161373

PMID:39195411

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11357460/

Abstract

This paper investigates the impact of halloysite nanotube (HNT) content on mechanical and shape memory properties of additively manufactured polyurethane (PU)/HNT nanocomposites. The inclusion of 8 wt% HNTs increases their tensile strength by 30.4% when compared with that of virgin PU at 44.75 MPa. Furthermore, consistently significant increases in tensile modulus, compressive strength and modulus, as well as specific energy absorption are also manifested by 47.2%, 34.0%, 125% and 72.7% relative to neat PU at 2.29 GPa, 3.88 MPa, 0.28 GPa and 0.44 kJ/kg respectively. However, increasing HNT content reduces lateral strain due to the restricted mobility of polymeric chains, leading to a decrease in negative Poisson's ratio (NPR). As such, shape recovery ratio and time of PU/HNT nanocomposites are reduced by 9 and 45% with the inclusion of 10 wt% HNTs despite an increasing shape fixity ratio up to 12% relative to those of neat PU.

摘要

本文研究了埃洛石纳米管（HNT）含量对增材制造的聚氨酯（PU）/HNT纳米复合材料的力学性能和形状记忆性能的影响。与原始PU相比，当HNT含量为8 wt%时，其拉伸强度提高了30.4%，达到44.75 MPa。此外，相对于纯PU，拉伸模量、抗压强度和模量以及比能量吸收也分别显著提高了47.2%、34.0%、125%和72.7%，分别为2.29 GPa、3.88 MPa、0.28 GPa和0.44 kJ/kg。然而，由于聚合物链的移动受限，HNT含量的增加会降低横向应变，导致负泊松比（NPR）降低。因此，尽管相对于纯PU，PU/HNT纳米复合材料的形状固定率提高了12%，但当加入10 wt%的HNT时，其形状恢复率和时间分别降低了9%和45%。