High Temperature Shape Memory Polymers

高温形状记忆聚合物

基本信息

  • 批准号:
    1309853
  • 负责人:
  • 金额:
    $ 36.82万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2013
  • 资助国家:
    美国
  • 起止时间:
    2013-06-01 至 2017-05-31
  • 项目状态:
    已结题

项目摘要

TECHNICAL SUMMARY: The objectives of the NSF-funded research are to develop and understand the structure and properties of high temperature shape memory polymers (HTSMPs) based on mixtures of an ionomer and a low molecular weight crystalline compound (LMWC). This includes developing a fundamental understanding of the molecular origin of shape memory in these two-component systems. The permanent crosslink in these materials is based on microphase separation of ionic nanodomains in the ionomer or covalent crosslinks, and the advantages/disadvantages of each design will be assessed. The temporary network derives from strong intermolecular interactions between the ionomer and the LMWC dispersed phase, and the switching temperature, Tc, is controlled by the melting point of the LMWC. The experimental work includes preparing HTSMPs by melt compounding and the characterization of their morphology, physical properties and mechanical properties. Shape memory characteristics will be assessed by shape memory cycles measured by dynamic mechanical analysis and the sustainability of the shape reversibility will be evaluated from cyclic testing experiments using larger prototype samples. The initial focus of the research will be mixtures of partially sulfonated poly(ether ether ketone) and sodium oleate with a targeted Tc ~ 200°C, but other systems based on high temperature ionomer matrices derived from polysulfones and polyimides and other LMWCs such as fatty acids, eutectic mixtures, fusible metals, ionic liquids, high melting point organic compounds, tin alloys and phosphate glasses will be considered to assess the efficacy of the ionomer/LMWC shape memory polymer design. NON-TECHNICAL SUMMARY: Shape memory polymers (SMP) are materials that have the capability of changing shape when exposed to an external stimulus (e.g., temperature, light or electrical or magnetic fields). Applications of these smart materials include orthodontic wires, polymer stents, biodegradable implants, artificial muscles, actuators, sensors, switches and smart textiles. Most SMPs are soft, thermally-activated materials with shape-switching temperatures lower than 100°C. Higher temperature applications, such as expandable structures with high strength and stiffness (e.g., deployable solar arrays, antennas and reflectors) and shape morphing surfaces and structures (e.g., airplane wings) require higher operating and switching temperatures. This NSF award supports research on the development of high temperature shape memory polymers made from mixtures of a thermoplastic polymer containing bonded ionic groups and a low molecular weight additive that interacts strongly with the ionic polymer. In addition to the development of new materials for high-performance applications, such as aerospace components, this project will include training scientists to work in the emerging field of smart materials. The research will involve graduate, undergraduate and high school students and high school science teachers. Special efforts will be made to recruit students form under-represented STEM groups to participate in the research. Collaborations will be sought with private industry and national laboratories to develop new fundamental knowledge of the subject materials and advance the development of new commercial applications. The scientific results from the research will be broadly disseminated through rapid publications in major scientific journals and presentations by the PI and students at national scientific meetings.
技术概要:NSF资助的研究的目标是开发和了解基于离聚物和低分子量结晶化合物(LMWC)混合物的高温形状记忆聚合物(HTSMPs)的结构和性能。 这包括对这些双组分系统中形状记忆的分子起源的基本理解。这些材料中的永久交联基于离聚物或共价交联中离子纳米域的微相分离,并将评估每种设计的优点/缺点。临时网络源自离聚物和LMWC分散相之间的强分子间相互作用,并且切换温度Tc由LMWC的熔点控制。实验工作包括熔融共混法制备HTSMPs,并对其形貌、物理性能和力学性能进行表征。将通过动态力学分析测量的形状记忆循环来评估形状记忆特性,并将使用较大原型样品通过循环测试实验来评价形状可逆性的可持续性。研究的最初重点将是部分磺化聚乙烯的混合物(醚醚酮)和油酸钠的高温离聚物基质,目标Tc约为200°C,但其他体系基于衍生自聚砜和聚酰亚胺的高温离聚物基质和其他LMWC,如脂肪酸、低共熔混合物、易熔金属、离子液体、高熔点有机化合物,锡合金和磷酸盐玻璃将被认为是评估离聚物/LMWC形状记忆聚合物设计的功效。 非技术性总结:形状记忆聚合物(SMP)是当暴露于外部刺激(例如,温度、光或电场或磁场)。这些智能材料的应用包括正畸线、聚合物支架、可生物降解的植入物、人造肌肉、致动器、传感器、开关和智能纺织品。大多数SMP是柔软的热活化材料,形状转换温度低于100°C。较高温度的应用,例如具有高强度和刚度的可膨胀结构(例如,可展开的太阳能阵列、天线和反射器)以及形状变形表面和结构(例如,飞机机翼)需要更高的操作和开关温度。该NSF奖项支持开发高温形状记忆聚合物的研究,该聚合物由含有键合离子基团的热塑性聚合物和与离子聚合物强烈相互作用的低分子量添加剂的混合物制成。除了开发用于高性能应用的新材料,如航空航天部件,该项目还将包括培训科学家在新兴的智能材料领域工作。这项研究将涉及研究生、本科生、高中生和高中科学教师。将特别努力从代表性不足的STEM团体中招募学生参与研究。 将寻求与私营行业和国家实验室的合作,以开发主题材料的新基础知识,并推动新商业应用的开发。研究的科学成果将通过在主要科学期刊上的快速出版物以及PI和学生在国家科学会议上的演讲而广泛传播。

项目成果

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Robert Weiss其他文献

Testing the Effectiveness of Motivational Interviewing as a Weight Reduction Strategy for Obese Cardiac Patients: A Pilot Study
测试动机访谈作为肥胖心脏病患者减肥策略的有效性:一项试点研究
  • DOI:
    10.1007/s12529-011-9219-9
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    2.7
  • 作者:
    K. G. Low;H. Giasson;Stephanie G. Connors;D. Freeman;Robert Weiss
  • 通讯作者:
    Robert Weiss
über die Mehrleistung des Herzens WÄhrend der Schwangerschaft
BODY FAT DISTRIBUTION AND REDUCED CORONARY ENDOTHELIAL FUNCTION IN PEOPLE LIVING WITH HIV
  • DOI:
    10.1016/s0735-1097(21)02979-x
  • 发表时间:
    2021-05-11
  • 期刊:
  • 影响因子:
  • 作者:
    Erin Goerlich;Michael Schar;Shashwatee Bagchi;Patricia Barditch-Crovo;Gabriele Bonanno;Yohannes Afework;Valerie Streeb;Gary Gerstenblith;Robert Weiss;Allison Hays
  • 通讯作者:
    Allison Hays
PD2-08 SYSTEMATIC REVIEW AND TREND OF THE FAILURE RATE OF ANGIOEMBOLIZATION FOR AML AND ITS COMPLICATIONS OVER THE PAST FIFTEEN YEARS
  • DOI:
    10.1016/j.juro.2014.02.140
  • 发表时间:
    2014-04-01
  • 期刊:
  • 影响因子:
  • 作者:
    Philip Zhao;Danielle Velez;Neal Patel;Robert Weiss
  • 通讯作者:
    Robert Weiss
1212 THE DIAGNOSTIC VALUE OF DIGITAL RECTAL EXAMINATION FOR PROSTATE CANCER: AN ANALYSIS OF OVER 50,000 BIOPSIES
  • DOI:
    10.1016/j.juro.2012.02.1501
  • 发表时间:
    2012-04-01
  • 期刊:
  • 影响因子:
  • 作者:
    Raymond Sultan;Robert Weiss
  • 通讯作者:
    Robert Weiss

Robert Weiss的其他文献

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{{ truncateString('Robert Weiss', 18)}}的其他基金

SBIR Phase II: Scalable Linear Ion Beam For Large Area Plasma Processing
SBIR 第二阶段:用于大面积等离子体处理的可扩展线性离子束
  • 批准号:
    1853254
  • 财政年份:
    2019
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant
NRT: Disaster Resilience and Risk Management (DRRM) - Creating quantitative decision making frameworks for multi-dimensional and multi-scale analysis of hazard impact
NRT:灾难恢复和风险管理(DRRM)——为灾害影响的多维度和多尺度分析创建定量决策框架
  • 批准号:
    1735139
  • 财政年份:
    2017
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant
Collaborative Research: The 2015 Taan Fjord landslide tsunami: An interdisciplinary study of cause & effect
合作研究:2015 年塔安峡湾滑坡海啸:原因的跨学科研究
  • 批准号:
    1638979
  • 财政年份:
    2016
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant
Collaborative Research: Tsunami and Tropical Storm Sediment Dynamics and Products
合作研究:海啸和热带风暴沉积动力学和产品
  • 批准号:
    1630099
  • 财政年份:
    2016
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant
SBIR Phase I: Low Damage Sputter Magnetron for Silicon Heterojunction PV Production
SBIR 第一阶段:用于硅异质结光伏生产的低损伤溅射磁控管
  • 批准号:
    1648580
  • 财政年份:
    2016
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant
Manufacture of Strong, Tough Hybrid Hydrogels
制造坚固、坚韧的混合水凝胶
  • 批准号:
    1300212
  • 财政年份:
    2013
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant
RAPID: Observations of physical impacts following Hurricane Sandy
RAPID:飓风桑迪后物理影响的观察
  • 批准号:
    1312813
  • 财政年份:
    2013
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant
Collaborative Research: Dynamics of Ionomer Melts
合作研究:离聚物熔体动力学
  • 批准号:
    1066517
  • 财政年份:
    2011
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant
Collaborative Research: Initial Wave Characteristics from Deformable Submarine Landslides
合作研究:可变形海底滑坡的初波特征
  • 批准号:
    1201390
  • 财政年份:
    2011
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant
Workshop: Tsunami sedimentology and its role in hazard awareness, preparedness, assessment and mitigation
研讨会:海啸沉积学及其在灾害意识、准备、评估和缓解中的作用
  • 批准号:
    1201428
  • 财政年份:
    2011
  • 资助金额:
    $ 36.82万
  • 项目类别:
    Standard Grant

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