Atmospheric Pressure Plasma Processing of Polymers: Plasma Dynamics and Nanoscale Plasma-Surface Interactions

聚合物的大气压等离子体加工：等离子体动力学和纳米级等离子体-表面相互作用

• 批准号: 0315353
• 负责人: Mark Kushner
• 金额: $ 32.4万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0315353&HistoricalAwards=false
• 关键词: Atmospheric; Pressure; Plasma; Processing; Polymers

Project SummaryAtmospheric Pressure Plasma Processing of Polymers: Plasma Dynamics and Nanoscale Plasma Surface InteractionsThis is a computational research program that investigates fundamentals of atmospheric-pressure plasma (APP) transport and plasma-surface interactions in the context of APP processing of polymers. The goals of this program are an integrated, multi-scale modeling hierarchy, spanning scales of nanometers to centimeters, and its use to determine the limiting plasma transport processes and upside potential of APP processing of high-value materials. These goals are met by developing a comprehensive, 3-dimensional plasma-dynamics model for atmospheric-pressure corona and glow discharges that is capable of investigating complex plasma chemistries; developing 3-d plasma-surface interaction algorithms capable of addressing the nanoscale spatial structures typically found on polymers; adapting feature-profile models (originally developed for semiconductor processing) to address plasma-initiated chemistry on polymer surfaces; and integrating these modules into a centimeter-to-nanometer hierarchy.The use of plasmas to produce desired surface properties of a polymer, such as hydrophobicity or hydrophilicity, is a topic both of current scientific investigation and of commercial interest. There are two pathways to achieve this functionalization: deposition and modification. In plasma deposition, polymeric surfaces with specific characteristics are obtained by depositing materials from a plasma. These processes are usually performed at low pressures in systems not unlike those used for microelectronics fabrication. As a consequence, such processing is usually limited to high-value-added materials, such as for biologically compatible coatings. In plasma modification, a conventionally manufactured inexpensive polymer is treated with a plasma to change its surface properties. These processes are typically conducted at atmospheric pressure using corona discharge devices in a "web" arrangement. Unlike low-pressure plasma deposition, APP (atmospheric pressure plasma) processing of polymers is usually a low-value-added process. Polymers and plastics such as polypropylene and polyethylene are processed to improve their adhesion and wettability. In spite of the commercial use of APPs for treating polymers, there are few first order, fundamentals-based models describing the plasma-surface interactions that modify polymer surfaces. As a consequence, the development and optimization of APPs for polymer processing has been, for all practical purposes, an empirical undertakingBroader Impacts The economic and societal benefits of being able to adapt inexpensive and high-volume APP methods for modifying polymers to produce high-value films is staggering. For example, biocompatible artificial skin for treatment of burn patients could be produced for $1/m2 as opposed to $1,000's to $10,000's per m2 which is typical of newly FDA-approved products. The current knowledge base is inadequate to make these advances and improving that knowledge base will help determine the practicality of achieving these goals. The computational techniques and improvements in the knowledge base produced in this project are applicable to a variety of APP applications, including lighting, toxic gas remediation, sterilization of surfaces, bioremediation, and microdischarges..

项目概要聚合物的大气压等离子体处理：等离子体动力学和纳米等离子体表面相互作用这是一个计算研究计划，调查大气压等离子体（APP）运输和等离子体表面相互作用的聚合物APP处理的背景下的基本原理。该计划的目标是一个集成的，多尺度的建模层次结构，跨越纳米到厘米的尺度，并使用它来确定限制等离子体传输过程和APP处理高价值材料的上行潜力。这些目标是通过开发一个全面的，三维等离子体动力学模型的大气压电晕和辉光放电，能够调查复杂的等离子体化学，开发三维等离子体表面相互作用的算法，能够解决纳米级的空间结构通常发现的聚合物;自适应特征轮廓模型（最初是为半导体加工而开发的），以解决聚合物表面上的等离子体引发化学;使用等离子体来产生聚合物的所需表面性质，例如疏水性或亲水性，是当前科学研究和商业兴趣的主题。有两种途径来实现这种功能化：沉积和修饰。 在等离子体沉积中，通过从等离子体沉积材料来获得具有特定特性的聚合物表面。 这些过程通常在低压下在与用于微电子制造的系统不同的系统中进行。 因此，这种加工通常限于高附加值材料，例如生物相容性涂层。 在等离子体改性中，用等离子体处理常规制造的廉价聚合物以改变其表面性质。 这些过程通常在大气压下使用呈“幅”布置的电晕放电装置进行。 与低压等离子体沉积不同，聚合物的APP（大气压等离子体）加工通常是一种低附加值的工艺。 对聚合物和塑料如聚丙烯和聚乙烯进行加工以改善其粘附性和润湿性。 尽管商业用途的APP处理聚合物，有几个一阶，基本面为基础的模型描述的等离子体表面相互作用，改性聚合物表面。 因此，用于聚合物加工的APP的开发和优化对于所有实际目的来说都是经验性的，更广泛的影响能够采用廉价和大批量的APP方法来改性聚合物以生产高价值的薄膜的经济和社会效益是惊人的。 例如，用于治疗烧伤患者的生物相容性人造皮肤可以以$1/m2生产，而不是$1，000至$10，000/m2，这是新FDA批准的产品的典型价格。目前的知识基础不足以取得这些进展，改进知识基础将有助于确定实现这些目标的可行性。 在这个项目中产生的知识库的计算技术和改进适用于各种APP应用，包括照明，有毒气体修复，表面消毒，生物修复和微放电。