相关实验视频

Updated: Sep 13, 2025

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

Published on: September 11, 2018

基于通过预拉伸诱导的多尺度结构取向的超坚固的聚氨/亚麻弹性体

Weijun Yang¹, Yu Zhang¹, Bing Li¹

¹The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China. weijun.yang@jiangnan.edu.cn.

Materials horizons

|July 28, 2025

概括

poliurethane/lignin 弹性体的预拉伸显著提高了机械性能. 这种简单的方法通过通过结构定向和应力诱导结晶来创建密集的交联网络来提高拉伸强度和性.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学

背景情况:

聚氨弹性体是多功能材料.
开发具有增强机械性能的强大的聚氨弹性体对于先进的应用至关重要.
结合生物基的交叉连接剂,如素纳米颗粒,提供了可持续的替代品.

研究的目的:

开发一种简单而有效的方法来设计超强的聚氨弹性体.
为了研究预拉伸对聚氨/质弹性体的机械性能和微观结构的影响.
探索素纳米颗粒 (LNP) 作为生物宏分子交叉连接器的作用.

主要方法:

聚氨/类弹性体的合成使用聚甲乙烯乙烯基醇 (PTMG),六甲二酸 (HDI),4,4'-二氧化乙烯 (DO) 和LNP.
在各种比率 (λ) 上对合成弹性体进行预拉伸的应用.
机械性能 (抗拉强度,性) 和结构变化 (相间距离,晶体距离,赫尔曼定向因子) 的表征.

主要成果:

在 λ = 14 时预拉伸聚氨/质弹性体,显著改善了机械性能.
拉力强度从32.4 MPa增加到116.2 MPa,性从298.7 MJ m−3提高到501.3 MJ m−3.
结构分析揭示了相间距离的减少,平面间晶体距离的增加,以及更高的赫尔曼方向因子,表明密集的交叉连接网络.

结论:

通过预拉伸来提高聚氨弹性体性能的一种新而简单的策略已被介绍.
预拉伸对多尺度结构定向和应力诱导结晶的综合效应是实现超强性质的关键.
这种方法为开发高性能,生物启发的聚氨弹性体提供了一个有前途的途径.

更多相关视频

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

Published on: March 8, 2019

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

相关概念视频

Polymer Classification: Architecture

Polymer Classification: Architecture

Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...

Members Made of Elastoplastic Material

Members Made of Elastoplastic Material

The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...

Types of Step-Growth Polymers: Polyesters

Types of Step-Growth Polymers: Polyesters

The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...