The role of order and disorder in impact absorbing materials

有序和无序在冲击吸收材料中的作用

• 批准号: 2743480
• 金额: --
• 依托单位: University of Leeds
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2743480
• 关键词: role; order; disorder; impact; absorbing

The everyday world is full of mechanical shocks, impacts and vibrations that cause damage - we need new materials to protect against these.Phone screens, cycling accidents, satellite launches, electric vehicle batteries, and wind turbine blades - all examples where inadequate protection from mechanical forces can have healthcare, safety, product longevity and financial consequences. We need to develop new lightweight impact absorbing and vibration damping materials.Conventional elastomeric materials (rubbers) tend to have poor shock absorbing (dissipative) capabilities. However, one class of ordered elastomer, called a liquid crystal elastomer (LCE), show particularly exceptional dissipative capabilities. One of the limitations of existing LCEs materials is that they have relatively small temperature windows between their glass transitions and their nematic-to-isotropic transition temperatures.This project seeks to widen the rubber nematic phase of LCEs making them suitable for a range of environments - such as those with large changes in temperature. Structure-property relationships will be developed and the performance of the materials as impact absorbers and vibration dampers in a range of environments will be demonstrated.

日常世界充满了机械冲击、冲击和振动，这些都会造成损害--我们需要新的材料来防止这些。手机屏幕、自行车事故、卫星发射、电动汽车电池和风力涡轮机叶片-所有这些例子都表明，对机械力的保护不足可能会导致医疗保健、安全、产品寿命和财务后果。我们需要开发新的轻质减震和减震材料。传统的弹性材料(橡胶)往往具有较差的减震(耗散)能力。然而，有一类有序弹性体，称为液晶弹性体(LCE)，表现出特别优异的耗散能力。现有LCES材料的局限性之一是，它们的玻璃化转变和向列相到各向同性转变温度之间的温度窗口相对较小。本项目旨在拓宽LCES的橡胶向列相，使其适用于一系列环境-例如温度变化较大的环境。将开发结构-性能关系，并将展示材料在一系列环境中作为冲击减振器和减振器的性能。