Studies on Mechanical Properties of Polymer Films under Nanoconfinement Effect

XIAO Yu-han; BAI Pei; GUO Yun-long

doi:10.14028/j.cnki.1003-3726.2024.24.211

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Studies on Mechanical Properties of Polymer Films under Nanoconfinement Effect

更新时间：2025-01-23

- Studies on Mechanical Properties of Polymer Films under Nanoconfinement Effect
- Polymer Bulletin Vol. 38, Issue 2, Pages: 183-193(2025)
- 作者机构：
  
  上海交通大学密西根学院，上海 200240
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2024.24.211
  CLC：
- Received：19 July 2024，
  
  Accepted：25 September 2024，
  
  Published Online：07 November 2024，
  
  Published：20 February 2025
- 稿件说明：
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肖雨寒, 柏培, 郭云龙. 纳米限域效应下聚合物薄膜力学性能的研究. 高分子通报, 2025, 38(2), 183–193.

Xiao, Y. H.; Bai, P.; Guo, Y. L. Studies on mechanical properties of polymer films under nanoconfinement effect. Polym. Bull. (in Chinese), 2025, 38(2), 183–193.
肖雨寒, 柏培, 郭云龙. 纳米限域效应下聚合物薄膜力学性能的研究. 高分子通报, 2025, 38(2), 183–193. DOI： 10.14028/j.cnki.1003-3726.2024.24.211.

Xiao, Y. H.; Bai, P.; Guo, Y. L. Studies on mechanical properties of polymer films under nanoconfinement effect. Polym. Bull. (in Chinese), 2025, 38(2), 183–193. DOI： 10.14028/j.cnki.1003-3726.2024.24.211.

摘要

准确掌握纳米尺度下聚合物的力学性能，对于其在纳米器件中作为功能材料或在微纳加工中作为结构模板等应用至关重要。研究发现，纳米限域作用下的聚合物力学性能相较于本体材料存在显著差异。传统测试仪器无法适用于纳米级聚合物材料，因此全面掌握纳米限域下的复杂黏弹性力学及其作用机理存在不小的挑战。近年来，我们通过搭建一套压力和温度可控的基于气压作用和高速摄影的力学测试系统，实现了对自支撑高分子纳米薄膜力学性能的直接观测。运用此系统，我们对100 nm以下厚度的橡胶弹性体和热塑性薄膜在受限于空气或聚合物界面时的力学性能(包括弹性、黏弹性和黏塑性等)进行了较深入的研究，结果揭示了纳米限域下聚合物薄膜力学性能的一些新奇特征。本专论文章简要综述了高分子纳米限域黏弹性力学领域的研究现状和最新成果，并展望了其未来发展趋势。

Abstract

Accurate comprehension of the mechanical properties of polymers at the nanoscale is essential for their application as functional materials or structural templates in nanodevices. Previous research has identified significant disparities in the mechanical properties of nanoscale polymers compared to bulk materials due to the nanoconfinement effect. However

conventional commercial testing instruments are often inadequate for evaluating nanoscale polymer materials

which poses a considerable challenge to fu

lly grasp the complex viscoelastic mechanics and its underlying mechanism under nanoconfinement. In recent years

we have realized the direct observation of the mechanical properties of supported polymer nanofilms by constructing a pressure- and temperature-controllable mechanical testing system based on pneumatic pressure action and high-speed photography. Using this system

the authors’ group has conducted a deeper study of the mechanical properties (including elasticity

viscoelasticity

and viscoplasticity

etc.

) of both rubber elastomers and thermoplastic films with thicknesses of less than 100 nm when confined to the air or polymer interface. The results reveal novel features of the mechanical properties of polymer films under the nanoconfinement effect. This monograph article briefly summarizes the current research status and recent results in the field of viscoelastic properties of the nanoconfined polymers and looks forward to the future development trend.

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