The Role of Grafting Mechanism on the Self-Assembly and Properties of Polymer Nanocomposites
接枝机制对聚合物纳米复合材料自组装和性能的作用
基本信息
- 批准号:1709061
- 负责人:
- 金额:$ 59.2万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-06-01 至 2023-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
NON-TECHNICAL SUMMARY: The addition of inorganic nanoparticles (NPs) to a polymer (i.e. a plastic material) can result in hybrid materials with highly improved properties. A classic example is that, while rubber (as e.g. in an eraser) has extremely poor wear resistance, the addition of silica nanoparticles causes the wear resistance to go up so much that a car can drive with tires that last over 50,000 miles. While such property improvements are what drive developments in the field of polymer nanocomposites, the inherent problem is that the nanoparticles are chemically so different from the polymer (a hydrocarbon material) and thus have a strong tendency to separate from each other akin to a water-oil suspension. Thus, the desirable, favorable property improvements that can only be realized by the intimate mixing of the polymer and the NPs become hard to realize on a routine basis. The work here proposes to remedy this problem by chemically grafting polymer chains onto the NPs so that the inorganic particle surface can be "shielded" from the polymer, thus allowing miscibility to be obtained. In particular, the work focuses on two strategies for this grafting: either grafting fully formed chains to the surfaces, or growing the chains piece-by-piece from the surface. Which of these strategies allows better control over particle-polymer miscibility and therefore improve properties the most is the focus of this research. In addition to this technical emphasis, the proposed work will also stress the broad, interdisciplinary education of students and the recruitment and retention of women and minority students into STEM programs by attracting high-school and undergraduate students into engineering research activities in the PI's laboratory.TECHNICAL SUMMARY: The focus of this proposal is on the self-assembly of polymer-grafted nanoparticles (NPs) in a polymer matrix with the goal of impacting the behavior of the resulting hybrid (or composite) material. This physical situation has relevance to improved performance in, for example, rubber tires and epoxies (which are used in electronic packaging and computer chip applications). This underpinning question will be studied through the exploration of three test-beds by judiciously combining theory and experiments. In particular, emphasis will be placed on role of the mechanism by which chains are grafted onto NP surfaces on the final material properties, i.e., whether the chains are preformed and attached to the surface or if the chains are grown link-by-link from the surface. It is expected that the former mechanism will yield a more uniform polymer coverage on the NP surface. The consequence of these differences in surface coverage on the assemblies formed and the resulting properties is the ultimate focus of this work. These research activities are coupled to extensive education and outreach activities. A major focus will be to recruit underrepresented students (both women and minorities) at both the undergraduate and graduate levels. It is planned to grow both the current summer high-school research program, and also the research-experiences-for-undergraduates program during the schoolyear, with the goal of recruiting (and hopefully retaining) women and minorities into STEM efforts.
非技术摘要:将无机纳米颗粒(NPs)添加到聚合物(即塑料材料)中可以得到具有极高性能的杂化材料。一个经典的例子是,虽然橡胶(例如橡皮擦中的橡胶)的耐磨性极差,但添加二氧化硅纳米颗粒会使耐磨性大大提高,以至于汽车可以使用超过50,000英里的轮胎行驶。虽然这种性能的改善推动了聚合物纳米复合材料领域的发展,但固有的问题是,纳米颗粒在化学上与聚合物(一种碳氢材料)非常不同,因此有很强的相互分离的趋势,类似于水-油悬浮液。因此,只有通过聚合物和NPs的紧密混合才能实现的期望的、有利的性能改善在常规基础上变得很难实现。这里的工作建议通过在纳米粒子上化学接枝高聚物链来解决这个问题,这样无机粒子表面就可以与聚合物“屏蔽”,从而获得相容性。特别是,这项工作侧重于这种嫁接的两种策略:要么将完全形成的链嫁接到表面,要么从表面逐段生长链。这些策略中哪一种可以更好地控制粒子-聚合物的相容性,从而最大限度地改善性能是本研究的重点。除了这一技术重点,拟议的工作还将强调对学生的广泛、跨学科的教育,以及通过吸引高中生和本科生参加PI实验室的工程研究活动,招募和留住女性和少数族裔学生参加STEM项目。技术摘要:这项建议的重点是聚合物接枝纳米颗粒(NP)在聚合物基质中的自组装,目的是影响所产生的杂化(或复合材料)材料的行为。这种物理状况与橡胶轮胎和环氧树脂(用于电子封装和计算机芯片应用)的性能改进有关。通过三个试验台的探索,巧妙地将理论和实验相结合,来研究这一支撑问题。特别是,将强调链嫁接到NP表面的机制对最终材料性质的作用,即链是否预先成形并附着在表面上,或者链是否从表面逐个生长。预计前一种机理将在NP表面产生更均匀的聚合物覆盖。表面覆盖率的这些差异对形成的组件和由此产生的性能的影响是这项工作的最终重点。这些研究活动与广泛的教育和外联活动相结合。一个主要的重点将是在本科生和研究生阶段招收代表性不足的学生(包括妇女和少数族裔)。目前的暑期高中研究计划和本科生研究体验计划都计划在学年期间增加,目标是招募(并希望留住)女性和少数族裔加入STEM努力。
项目成果
期刊论文数量(9)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Detecting bound polymer layers in attractive polymer–nanoparticle hybrids
检测有吸引力的聚合物与纳米颗粒混合物中的结合聚合物层
- DOI:10.1039/d1nr02395k
- 发表时间:2021
- 期刊:
- 影响因子:6.7
- 作者:Emamy, Hamed;Starr, Francis W.;Kumar, Sanat K.
- 通讯作者:Kumar, Sanat K.
Assembly of Polymer-Grafted Nanoparticles in Polymer Matrices
- DOI:10.1021/acsnano.0c05495
- 发表时间:2020-10-27
- 期刊:
- 影响因子:17.1
- 作者:Koh, Clement;Grest, Gary S.;Kumar, Sanat K.
- 通讯作者:Kumar, Sanat K.
Role of Grafting Mechanism on the Polymer Coverage and Self-Assembly of Hairy Nanoparticles
- DOI:10.1021/acsnano.7b02657
- 发表时间:2017-07-01
- 期刊:
- 影响因子:17.1
- 作者:Asai, Makoto;Zhao, Dan;Kumar, Sanat K.
- 通讯作者:Kumar, Sanat K.
Impact of the Distributions of Core Size and Grafting Density on the Self-Assembly of Polymer Grafted Nanoparticles
- DOI:10.1021/acs.macromol.7b01093
- 发表时间:2017-10-10
- 期刊:
- 影响因子:5.5
- 作者:Bachhar, Nirmalya;Jiao, Yang;Kumar, Sanat K.
- 通讯作者:Kumar, Sanat K.
Compatibilizing Immiscible Polymer Blends with Sparsely Grafted Nanoparticles
- DOI:10.1021/acs.macromol.0c02108
- 发表时间:2020-12-08
- 期刊:
- 影响因子:5.5
- 作者:Alkhodairi, Husam;Russell, Sebastian T.;Kumar, Sanat K.
- 通讯作者:Kumar, Sanat K.
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Sanat Kumar其他文献
Feasibility of Hydrate-Based Carbon dioxide Sequestration in Arabian Sea Sediments
- DOI:
10.1016/j.cej.2024.155696 - 发表时间:
2024-11-01 - 期刊:
- 影响因子:
- 作者:
Shweta Negi;Avinash V. Palodkar;Suhas Suresh Shetye;Sanat Kumar;Asheesh Kumar - 通讯作者:
Asheesh Kumar
Studies on Carbon Number Distribution of High Melting Microcrystalline Waxes
高熔点微晶蜡碳数分布的研究
- DOI:
10.1081/lft-120018171 - 发表时间:
2003 - 期刊:
- 影响因子:1.5
- 作者:
Sanat Kumar;A. Gupta;K. Agrawal - 通讯作者:
K. Agrawal
Clustering in binary mixtures of axial multipoles confined to a two-dimensional plane
- DOI:
10.1016/j.physa.2014.08.065 - 发表时间:
2014-12-15 - 期刊:
- 影响因子:
- 作者:
Manjori Mukherjee;Sanat Kumar;Pankaj Mishra - 通讯作者:
Pankaj Mishra
Enhanced catalytic co-conversion of biomass and plastic volatiles using metal-enhanced HZSM-5 extrudates: a study on pyro-kinetic, synergistic, and thermodynamic efficacy
使用金属增强的 HZSM-5 挤出物增强生物质和塑料挥发物的催化共转化:热动力学、协同作用和热力学功效的研究
- DOI:
10.1007/s13399-025-06675-6 - 发表时间:
2025-03-04 - 期刊:
- 影响因子:4.100
- 作者:
T. Nandakumar;Uma Dwivedi;Palmurukan M. Ramar;K. K. Pant;Sanat Kumar;Ekambaram Balaraman - 通讯作者:
Ekambaram Balaraman
Multi-lab study on the pure-gas permeation of commercial polysulfone (PSf) membranes: Measurement standards and best practices
商用聚砜 (PSf) 膜纯气体渗透性的多实验室研究:测量标准和最佳实践
- DOI:
- 发表时间:
2022 - 期刊:
- 影响因子:9.5
- 作者:
Katherine Mizrahi Rodriguez;Wanjiang Wu;Taliehsadat Alebrahim;Yiming Cao;B. Freeman;Daniel J. Harrigan;Mayank Jhalaria;A. Kratochvil;Sanat Kumar;Won Hee Lee;Y. Lee;Haiqing Lin;Julian M. Richardson;Qilei Song;Benjamin J Sundell;R. Thür;I. Vankelecom;Anqi Wang;Lina Wang;Catherine Wiscount;Z. Smith - 通讯作者:
Z. Smith
Sanat Kumar的其他文献
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{{ truncateString('Sanat Kumar', 18)}}的其他基金
Collaborative Research: Designing Polymer Grafted-Nanoparticle Melts through a Hierarchical Computational Approach
合作研究:通过分层计算方法设计聚合物接枝纳米颗粒熔体
- 批准号:
2226898 - 财政年份:2023
- 资助金额:
$ 59.2万 - 项目类别:
Standard Grant
CAS-MNP: Origins of Secondary Nanoplastics and Mitigating Their Creation
CAS-MNP:二次纳米塑料的起源以及减少其产生
- 批准号:
2301348 - 财政年份:2023
- 资助金额:
$ 59.2万 - 项目类别:
Standard Grant
Data-Enabled Theoretical Understanding of the Structure and Properties of Solvent-cast Polymer Nanocomposites
基于数据的理论理解溶剂浇铸聚合物纳米复合材料的结构和性能
- 批准号:
2126660 - 财政年份:2022
- 资助金额:
$ 59.2万 - 项目类别:
Standard Grant
Critical Factors Controlling Gas Separations by Polymeric Membranes
控制聚合物膜气体分离的关键因素
- 批准号:
1829655 - 财政年份:2019
- 资助金额:
$ 59.2万 - 项目类别:
Standard Grant
DMREF: Collaborative Research: Designing Optimal Nanoparticle Shapes and Ligand Parameters for Polymer-Grafted Nanoparticle Membranes
DMREF:合作研究:为聚合物接枝纳米颗粒膜设计最佳纳米颗粒形状和配体参数
- 批准号:
1629502 - 财政年份:2016
- 资助金额:
$ 59.2万 - 项目类别:
Standard Grant
Modeling Solute Diffusion in Polymeric Membranes for Gas Separations
模拟气体分离聚合物膜中的溶质扩散
- 批准号:
1507030 - 财政年份:2015
- 资助金额:
$ 59.2万 - 项目类别:
Continuing Grant
Controlling Nanocomposite Properties by Nanoparticle Assembly
通过纳米颗粒组装控制纳米复合材料性能
- 批准号:
1408323 - 财政年份:2014
- 资助金额:
$ 59.2万 - 项目类别:
Continuing Grant
Collaborative Research: Exploiting Void Symmetries to Control the Self-Assembly of Nanoparticles
合作研究:利用空洞对称性来控制纳米颗粒的自组装
- 批准号:
1403049 - 财政年份:2014
- 资助金额:
$ 59.2万 - 项目类别:
Standard Grant
Tailoring Polymer Nanocomposite Properties by Nanoparticle Assembly
通过纳米颗粒组装定制聚合物纳米复合材料性能
- 批准号:
1106180 - 财政年份:2011
- 资助金额:
$ 59.2万 - 项目类别:
Continuing Grant
相似国自然基金
Teichmuller 空间的光滑 grafting 映射
- 批准号:n/a
- 批准年份:2022
- 资助金额:10.0 万元
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光触“grafting-onto”ATRP构建聚合物刷微相分离涂层及其润湿行为调控机制
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- 批准年份:2014
- 资助金额:25.0 万元
- 项目类别:青年科学基金项目
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Angiogenesis process in wound healing and vascular grafting and the role of pericytes.
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