Collaborative Research: Electrospray Deposition of 'Melting Gels' for Multifunctional Coatings

合作研究：多功能涂层“熔融凝胶”的电喷雾沉积

• 批准号: 1911509
• 负责人: Andrei Jitianu
• 金额: $ 25.42万
• 依托单位: Research Foundation Of The City University Of New York (Lehman)
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1911509&HistoricalAwards=false
• 关键词: Collaborative; Research; Electrospray; Deposition; Melting

Silica glass has been valued more than 2000 years for its optical properties and chemical and thermal stability, making it a natural candidate for surface coatings. Current methods, such as chemical vapor deposition or conventional sol-gel processing, often require energy-costly high vacuum or high temperature methods. This collaborative project seeks to couple innovations in a new class of sol gel materials, 'melting gels', with electrospray deposition to create materials-efficient, durable hybrid glass coatings. Melting gels transform into these hybrid glasses at low temperatures enabling the use of substrates that would not normally be considered, such as polymer webs that are key for continuous manufacturing. The combination with electrospray, a type of industrially-accepted electrostatic manufacturing technology, enables thin (microscale) coatings on complex three-dimensional surfaces with facile incorporation of additives in ambient processing conditions. This award contributes fundamental understanding of the key process settings and the resulting coating properties (e.g. mechanical, electrical, chemical, and/or biological) that are desirable for a wide variety of coating applications. Results from this research benefits industrial applications in aerospace, nautical, automotive, and medical implant sectors, which would benefit U.S. economy. This project provides opportunities for students from a smaller Hispanic-serving institution and a major research institution to collaborate and engage in multidisciplinary research. Melting gels are oligomeric silsesquioxane materials made by a sol-gel process that possess consolidation temperatures in the range of 120 to 170 degree C, where the melting gels decompose and crosslink into an irreversible hybrid organically-modified silica network. Melting gels and their hybrid glass partners are synthesized using a soft-chemistry approach that allows for direct covalent bonding of organic moieties to the inorganic network. Electrospray deposition, a means of delivering uniform charged microdroplets in a high electric field, provides the necessary dynamic control of the micro- to nano-scale structure of melting gels to achieve superior coating properties. However, the effects of the charge injection and polarity of the spray on the sol-gel are currently unknown. This research varies these parameters along with the melting gel consolidation temperature and intrinsic charge to identify changes in the consolidation mechanism through primarily mechanical and spectroscopic analysis. These effects are then be connected to the final performance of the coatings. The team for this grant consists of two partners, combining sol-gel chemistry and electrospray deposition expertise to create a holistic approach for synthesis, processing, and property characterization.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

硅胶因其光学性质以及化学和热稳定性的价值超过2000年，使其成为表面涂层的天然候选者。当前方法，例如化学蒸气沉积或常规的溶胶 - 凝胶加工，通常需要能量高的真空或高温方法。该协作项目旨在将新的溶胶凝胶材料“融化凝胶”和电喷雾沉积与材料效率高，耐用的混合玻璃涂料进行融合。熔化的凝胶在低温下转变为这些混合玻璃，从而可以使用通常不考虑的底物，例如聚合物网，这是连续制造的关键。与电喷雾（一种工业认可的静电制造技术）相结合，可以在复杂的三维表面上进行薄（显微镜）涂层，并在环境处理条件下轻松掺入添加剂。该奖项对关键过程设置以及所得的涂料特性（例如机械，电气，化学和/或生物学）有了基本的了解，这些特性是多种涂层应用所需的。该研究的结果使航空航天，航海，汽车和医疗植入部门的工业应用有益，这将使美国经济有益。该项目为较小的西班牙裔服务机构和主要研究机构的学生提供了合作和参与多学科研究的机会。融化凝胶是由溶胶 - 凝胶工艺制成的寡聚硅盐盐材料，该过程具有固结温度在120至170摄氏度的范围内，其中熔融凝胶分解和交联到不可逆的混合有机修饰的二氧化硅网络。 熔融凝胶及其混合玻璃伴侣是使用软化学方法合成的，该方法允许将有机部分与无机网络直接共价键合。 电喷雾沉积是一种在高电场中传递带电的微螺旋体的一种方法，它提供了对熔解凝胶的微观至纳米尺度结构的必要动态控制，以实现出色的涂层特性。然而，目前尚不清楚喷雾剂注入和喷雾剂对溶胶 - 凝胶的影响。 这项研究将这些参数随熔融凝胶巩固温度和内在电荷而变化，以通过主要的机械和光谱分析来鉴定合并机制的变化。 然后将这些效果连接到涂料的最终性能。该赠款的团队由两个合作伙伴组成，将Sol-Gel化学和电喷雾沉积专业知识相结合，为合成，处理和财产特征创建了整体方法。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响审查标准来通过评估来获得支持的。

项目成果

Effect of tetraethoxysilane (TEOS) on melting gel behavior

• DOI: 10.1111/jace.17106
• 发表时间: 2020-04
• 期刊: Journal of the American Ceramic Society
• 影响因子: 3.9
• 作者: L. Klein;Kutaiba Al-Marzoki;A. Jitianu;G. Rodríguez

Parametric Control of Melting Gel Morphology and Chemistry via Electrospray Deposition

通过电喷雾沉积对熔融凝胶形态和化学进行参数控制

• DOI: 10.1115/msec2021-63347
• 发表时间: 2021
• 期刊: ASME 2021 16th International Manufacturing Science and Engineering Conference
• 作者: 1. Grzenda, M.;Gamboa, A. R.;Mercado, J.;Lei, L.;Guzman, J.;Klein, L. C.;Jitianu, A.;Singer, J. P
• 通讯作者: Singer, J. P

Microscale Templating of Materials across Electrospray Deposition Regimes

• DOI: 10.3390/coatings13030599
• 发表时间: 2023-03-01
• 期刊: COATINGS
• 影响因子: 3.4
• 作者: Grzenda, Michael J.;Atzampou, Maria;Singer, Jonathan P.
• 通讯作者: Singer, Jonathan P.