形状记忆交联聚乙烯的制备及其光热、磁响应性能

黄芸珂; 汪艳

doi:10.14028/j.cnki.1003-3726.2024.24.210

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形状记忆交联聚乙烯的制备及其光热、磁响应性能

研究论文 | 更新时间：2024-12-12

- 形状记忆交联聚乙烯的制备及其光热、磁响应性能
- Preparation of Shape Memory Cross-linked Polyethylene and Its Photothermal and Magnetic Response Properties
- 高分子通报 2024年37卷第12期页码：1814-1820
- 作者机构：
  
  武汉工程大学材料科学与工程学院，武汉 430037
- 作者简介：
  
  *汪艳，E-mail: wangyan@wit.edu.cn
- 基金信息：
  
  3D打印聚合物及复合材料广东省企业重点实验室项目(2018B030323001);武汉工程大学第十五届研究生教育创新基金项目(CX2023089)
- DOI：10.14028/j.cnki.1003-3726.2024.24.210
  中图分类号：
- 纸质出版日期：2024-12-20，
  
  网络出版日期：2024-08-23，
  
  收稿日期：2024-07-19，
  
  录用日期：2024-08-06
- 稿件说明：
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黄芸珂, 汪艳. 形状记忆交联聚乙烯的制备及其光热、磁响应性能. 高分子通报, 2024, 37(12), 1814–1820

Huang, Y. K.; Wang, Y.; Preparation of shape memory cross-linked polyethylene and its photothermal and magnetic response properties. Polym. Bull. (in Chinese), 2024, 37(12), 1814–1820
黄芸珂, 汪艳. 形状记忆交联聚乙烯的制备及其光热、磁响应性能. 高分子通报, 2024, 37(12), 1814–1820 DOI： 10.14028/j.cnki.1003-3726.2024.24.210.

Huang, Y. K.; Wang, Y.; Preparation of shape memory cross-linked polyethylene and its photothermal and magnetic response properties. Polym. Bull. (in Chinese), 2024, 37(12), 1814–1820 DOI： 10.14028/j.cnki.1003-3726.2024.24.210.

摘要

低密度聚乙烯(LDPE)经过过氧化物交联改性后可形成三维网状结构，并表现出形状记忆性能。所得的热固性形状记忆聚合物(SMP)结构稳定，形状回复能力强，多次循环仍可保持较高的形状回复率(

)和固定率(

)。然而热响应SMP的应用环境单一，需要直接接触加热才能触发形状记忆效应。因此，通过加入功能性的填料赋予其多种响应方式，从而应用于可远程控制的医疗器械、软机器人以及航空航天等领域。本工作以LDPE为基材，以Fe

为填料，选用2

5-二(叔丁基过氧)-2

5-二甲基-3-己炔(DTBP)为交联剂，三烯丙基异氰脲酸酯(TAIC)为助交联剂，制备了具有光热、磁响应的形状记忆LDPE/Fe

复合材料。通过探究DTBP含量对性能的影响，发现随着DTBP的增加，试样的凝胶含量、力学性能以及形状记忆性能都呈现上升趋势。当DTBP含量为2 wt%时，LDPE/Fe

的凝胶含量达到最大值83.09%，力学性能综合表现最优，拉伸强度达10.03 MPa较未交联的试样提高了28%；且形状记忆性能优异，

接近100%，

达96.52%。同时，复合材料的光热转化能力较强，7 s内可升温至105.6 ℃，制成的花朵试样在18 s内回复到原始形状。

Abstract

Low-density polyethylene (LDPE) forms a three-dimensional mesh structure after peroxide cross-linking modification and exhibits shape memory properties. The obtained thermoset shape memory polymer (SMP) shows good structural stability and excellent shape recovery

which can maintain high shape recovery (

) and fixation rates (

) even after multiple cycles. However

thermos-responsive SMP have limited application environments

that require direct contact heating to trigger the shape memory effect. By adding functional fillers

it can be endowed with a variety of response modes for applications such as remotely controllable medical devices

soft robotics

and aerospace. In this work

LDPE as a substrate and Fe

as a filler

5-bis(tert-butylperoxy)-2

5-dimethyl-3-hexynyl (DTBP) was selected as a cross-linking agent

and triallyl isocyanurate (TAIC) as a co-cross-linking agent

to prepare shape-memory LDPE/Fe3O4 composites with photo-thermal and magnetic responses. By exploring the effect of DTBP content on the properties

it was found that the gel content

mechanical properties

and shape memory properties of the sample showed an increasing trend with the increase of DTBP. It was found that when DTBP content was 2 wt%

the gel content of LDPE/Fe

reached a maximum value of 83.09%. And the mechanical properties had the optimal overall performance

with a tensile strength of 10.03 MPa

28% higher than that of the uncrosslinked sample; the shape memory performance was also excellent

with a

of close to 100%

and

reaches 96.52%. At the same time

the LDPE/Fe

has a strong photothermal conversion ability

and can be heated up to 105.6 ℃ within 7 s

and the flower sample returns to the original shape within 18 s.

关键词

交联聚乙烯形状记忆聚合物光热响应磁响应Fe3O4纳米粒子

Keywords

Crosslinked polyethyleneShape memory polymerPhotothermal responsiveMagnetic responsiveFe3O4 nanoparticle

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