Video Experimental Relacionado

Updated: Sep 10, 2025

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

Coordinación jerárquica de enlaces de hidrógeno y metal para elastómeros de alta resistencia y alta disipación en un

Lei Yang¹, Jialu Shang¹, Shuping Sun¹

¹School of Material Science and Engineering, Beijing Institute of Technology, No.5 South Zhongguancun Street, Haidian District, Beijing, 100081, China.

Small (Weinheim an der Bergstrasse, Germany)

|August 26, 2025

Resumen

Los investigadores desarrollaron un nuevo elastómero de poliuretano supramolecular utilizando ácido tartárico y coordinación de iones de zinc. Este material avanzado ofrece alta resistencia, elasticidad y amortiguación excepcional en el rango de temperatura para aplicaciones exigentes.

Área de la Ciencia:

Ciencias de los materiales
Química de los polímeros
Química supramolecular

Sus antecedentes:

El desarrollo de elastómeros con alta resistencia, elasticidad y amortiguación de amplio rango de temperatura es un desafío.
Los materiales multifuncionales son cruciales para las aplicaciones de ingeniería avanzada.

Objetivo del estudio:

Para sintetizar un elastómero de poliuretano supramolecular (PUTAZn x) con propiedades mecánicas mejoradas y rendimiento de amortiguación.
Investigar el papel de los enlaces jerárquicos de hidrógeno y la coordinación de iones de zinc en las propiedades de los materiales.

Principales métodos:

Elastómero de poliuretano supramolecular sintetizado (PUTAZn x) mediante la extensión de la cadena del ácido tartárico.
Incorporado en la coordinación dinámica de iones de zinc.
Analizó la red jerárquica de enlaces de hidrógeno y su comportamiento dependiente de la temperatura.

Principales resultados:

Se obtiene una alta resistencia a la tracción (27,27 MPa) y un alargamiento al romperse (1513%).
Se ha demostrado un rango de temperatura de amortiguación eficaz muy amplio (de 15,9°C a 158,4°C, que abarca 142,5°C).
Los enlaces jerárquicos de hidrógeno y la coordinación de zinc contribuyen a mejorar el amortiguación y las propiedades mecánicas.

Conclusiones:

El elastómero sintetizado PUTAZn x exhibe una resistencia superior, elasticidad y amortiguación de amplio alcance.
El enlace jerárquico de hidrógeno y la coordinación dinámica de zinc son estrategias efectivas para diseñar elastómeros de alto rendimiento.
El material muestra potencial para la disipación eficiente de energía bajo carga dinámica en condiciones extremas.

Palabras clave:

Coordinación enlace-metal el amortiguamiento Elástico disipación de energía enlace jerárquico de hidrógeno

Más Videos Relacionados

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

In Situ High Pressure Hydrogen Tribological Testing of Common Polymer Materials Used in the Hydrogen Delivery Infrastructure

In Situ High Pressure Hydrogen Tribological Testing of Common Polymer Materials Used in the Hydrogen Delivery Infrastructure

Published on: March 31, 2018

Videos de Conceptos Relacionados

Stability of Conjugated Dienes

Stability of Conjugated Dienes

Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.

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...

Hydrogen Bonds

Hydrogen Bonds

A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...

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...

Metal-Ligand Bonds

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

Acid Strength and Molecular Structure

Acid Strength and Molecular Structure

Binary Acids and Bases
In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A bond strength decreases down a group in the periodic table. For group 17, the order of increasing acidity is HF < HCl < HBr < HI. Likewise, for group 16, the order of increasing acid strength is H2O < H2S < H2Se < H2Te. Across a row in the periodic table, the acid strength of binary hydrogen compounds increases with...