Nanostructured Composite Coatings to Harden and Toughen Polymer Surfaces

用于硬化和增韧聚合物表面的纳米结构复合涂层

• 批准号: 1662695
• 负责人: Daeyeon Lee
• 金额: $ 38万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-06-01 至 2022-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1662695&HistoricalAwards=false
• 关键词: Nanostructured; Composite; Coatings; Harden; Toughen

Owing to their low density, high toughness, ease of processing and low cost, polymers are playing increasingly important roles in a broad set of applications, including electronics, vehicles, building materials, and industrial and household appliances. Compared to metals and ceramics, however, polymers have rather poor scratch- and wear-resistance. A common approach to enhance the scratch/wear resistance of polymers is to add hard coatings on their surfaces. However, many conventional hard coatings suffer from poor adhesion to the polymer and can crack easily. Furthermore, the conventional deposition methods for hard coatings are often done under negative pressure, making them expensive and challenging to implement for large-area processing. The goal of this work is to investigate a new class of nanostructured coatings that have high scratch and crack resistance and can be produced using an inexpensive scalable method. This work is motivated by recent success in creating nanocomposite coatings with extremely high concentrations of nanoparticles based on infiltration of polymers into nanoparticle films. These coatings can be formed directly on the surface of polymers to produce coatings that have very strong adhesion and high scratch resistance. Scratch resistant nanocomposite hard coatings can potentially be used as key components of next-generation energy storage and conversion devices as well as optical, biosensors and electronic devices. Also, such materials have applications as barriers in electronics and food packaging. The team will develop modules demonstrating the properties of composite materials for use at outreach events planned for students, teachers and the general public.This project will establish the processing-structure-property relationships of brick-and-mortar structured nanocomposite coatings produced via capillary rise infiltration (CaRI) of poly(methylmethacrylate) into films of gibbsite nanoplatelets. The project is a collaboration between two investigators: Lee, an expert in the fabrication and structural and optical characterization of nanostructured materials, and Turner, an expert in materials and mechanics. The project will address fundamental issues that must be understood and overcome to advance CaRI materials and the general area of nanocomposites. Specifically, the effect of spatial confinement on the capillary rise and transport of large polymers through nanoporous media will be studied by changing the molecular weight of the polymer and its size relative to the characteristic pore size in the nanoplatelet film. Furthermore, by taking advantage of the versatility and tunability of the CaRI process, the relationship between the internal structure of the composite coatings and their mechanical and optical properties will be established. Through processing, characterization, and modeling, we will develop a holistic understanding of processing-structure-property relationship of CaRI composites.

由于其低密度、高韧性、易于加工和低成本，聚合物在电子、车辆、建筑材料以及工业和家用电器等广泛应用中发挥着越来越重要的作用。然而，与金属和陶瓷相比，聚合物的耐刮擦性和耐磨性相当差。增强聚合物耐刮擦/耐磨性的常见方法是在其表面添加硬质涂层。然而，许多传统的硬涂层与聚合物的附着力较差，并且很容易破裂。此外，传统的硬质涂层沉积方法通常在负压下完成，这使得它们成本高昂且难以在大面积加工中实施。这项工作的目标是研究一种新型纳米结构涂层，该涂层具有高抗划伤性和抗裂性，并且可以使用廉价的可扩展方法生产。这项工作的动机是最近在聚合物渗透到纳米颗粒薄膜的基础上成功创建了具有极高浓度纳米颗粒的纳米复合涂层。这些涂层可以直接在聚合物表面形成，产生具有非常强的附着力和高抗划伤性的涂层。耐刮擦纳米复合硬质涂层有可能用作下一代能量存储和转换设备以及光学、生物传感器和电子设备的关键组件。 此外，此类材料还可用作电子和食品包装中的屏障。该团队将开发模块，展示复合材料的性能，用于计划为学生、教师和公众举办的宣传活动。该项目将建立通过聚甲基丙烯酸甲酯毛细管上升渗透 (CaRI) 到三水铝石纳米片薄膜中生产的实体结构纳米复合涂层的加工-结构-性能关系。 该项目是两位研究人员之间的合作：李是纳米结构材料的制造、结构和光学表征方面的专家，特纳是材料和力学方面的专家。该项目将解决必须理解和克服的基本问题，以推进 CaRI 材料和纳米复合材料的一般领域。具体而言，将通过改变聚合物的分子量及其相对于纳米片薄膜中特征孔径的尺寸来研究空间限制对毛细管上升和大聚合物通过纳米多孔介质传输的影响。此外，通过利用CaRI工艺的多功能性和可调性，将建立复合涂层的内部结构与其机械和光学性能之间的关系。通过加工、表征和建模，我们将全面了解 CaRI 复合材料的加工-结构-性能关系。

项目成果

Polymer blend-filled nanoparticle films via monomer-driven infiltration of polymer and photopolymerization

• DOI: 10.1039/c7me00099e
• 发表时间: 2018-02
• 期刊: Journal of Rheology
• 影响因子: 3.3
• 作者: Yiwei Qiang;N. Manohar;K. Stebe;Daeyeon Lee

Toughening Nanoparticle Films via Polymer Infiltration and Confinement

通过聚合物渗透和限制增韧纳米颗粒薄膜

• DOI: 10.1021/acsami.8b15027
• 发表时间: 2018
• 期刊: ACS Applied Materials & Interfaces
• 影响因子: 9.5
• 作者: Jiang, Yijie;Hor, Jyo Lyn;Lee, Daeyeon;Turner, Kevin T.
• 通讯作者: Turner, Kevin T.

Polymer-infiltrated nanoplatelet films with nacre-like structure via flow coating and capillary rise infiltration (CaRI)

• DOI: 10.1039/d0nr08691f
• 发表时间: 2021-03-14
• 期刊: NANOSCALE
• 影响因子: 6.7
• 作者: Qiang, Yiwei;Turner, Kevin T.;Lee, Daeyeon
• 通讯作者: Lee, Daeyeon

Disordered Nanoparticle Packings under Local Stress Exhibit Avalanche-Like, Environmentally Dependent Plastic Deformation

无序纳米颗粒填料在局部应力下表现出类雪崩、环境依赖性塑性变形

• DOI: 10.1021/acs.nanolett.8b01640
• 发表时间: 2018
• 期刊: Nano Letters
• 影响因子: 10.8
• 作者: Lefever, Joel A.;Mulderrig, Jason P.;Hor, Jyo Lyn;Lee, Daeyeon;Carpick, Robert W.
• 通讯作者: Carpick, Robert W.

Effect of Physical Nanoconfinement on the Viscosity of Unentangled Polymers during Capillary Rise Infiltration

• DOI: 10.1021/acs.macromol.8b00966
• 发表时间: 2018-07-24
• 期刊: MACROMOLECULES
• 影响因子: 5.5
• 作者: Hor, Jyo Lyn;Wang, Haonan;Lee, Daeyeon
• 通讯作者: Lee, Daeyeon