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相关概念视频

Elastin is Responsible for Tissue Elasticity01:12

Elastin is Responsible for Tissue Elasticity

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Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
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Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

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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...
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Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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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...
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Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

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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...
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Polymers02:34

Polymers

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相关实验视频

Updated: Jul 16, 2025

Production of Elastin-like Protein Hydrogels for Encapsulation and Immunostaining of Cells in 3D
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可拉伸,强,可回收的化物弹性体,基于动态共价相互作用.

Hafeez Ur Rehman1,2, Mikael S Hedenqvist3, Yujie Chen1

  • 1State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.

ACS applied materials & interfaces
|September 20, 2023
PubMed
概括

研究人员使用动态共价键开发了一种新的可回收弹性体. 这种先进的聚合物在几分钟内表现出100%的自我愈合,并在几个小时内降解,为传统塑料提供了一个可持续的替代品.

关键词:
可降解的可降解物质弹性体的弹性体是什么一个直升机.可回收利用的可回收利用.它具有自我愈合的功能.

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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
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科学领域:

  • 聚合物化学 聚合物化学
  • 材料科学 材料科学 材料科学
  • 可持续化学 可持续化学

背景情况:

  • 目前的合成聚合物生产和处置方法是不可持续的.
  • 动态共价键为设计先进的分子结构提供了一个可逆的特性.
  • 这些纽带使得可回收和机械互锁材料的创造成为可能.

研究的目的:

  • 开发一种基于螺旋体的新型弹性体网络.
  • 将自我愈合,回收和降解能力纳入弹性质.
  • 为了解决目前不可持续的聚合物技术的局限性.

主要方法:

  • 合成基于螺旋体的弹性体网络,利用动态共价键.
  • 在各种溶液条件下 (H2O,HCl,NaOH) 评估自我愈合特性.
  • 根据结合类型,pH值和共聚物网络评估水解性降解速率.
  • 在多次回收循环后测试机械性能.

主要成果:

  • 在10-20分钟内实现了100%的自我愈合性能.
  • 在测试条件下,机械性能在1-1.4 MPa之间.
  • 根据具体参数,水解性降解发生在4-11小时内.
  • 材料在连续五次回收循环后保持了良好的机械性能.

结论:

  • 开发的基于螺旋体的弹性体表现出显著的自我愈合,降解和回收能力.
  • 该材料为聚合物应用和包装提供了一个有希望的可持续替代品.
  • 动态共价键的可逆性质是实现这些理想材料性质的关键.