2001 TSE: Formulating Waterborne Coatings for the Environment: Interactions in Water-Cosolvent Media between Associating Polymers, Surfactants, and Colloidal Particles

2001 TSE：配制环保水性涂料：缔合聚合物、表面活性剂和胶体颗粒在水共溶剂介质中的相互作用

• 批准号: 0124848
• 负责人: Paschalis Alexandridis
• 金额: $ 30万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-15 至 2005-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0124848&HistoricalAwards=false
• 关键词: 2001; TSE; Formulating; Waterborne; Coatings

AbstractCTS-0124848Alexandridis, PSUNY BuffaloFormulating Waterborne Coatings for the Environment: Interactions in Water-Cosolvent Media between Associating Polymers, Surfactants, and Colloidal ParticlesBackground: The coatings and paints industry commands a 50 billion-dollar market worldwide. Over 1 billion gallons of coatings and paints are sold in the U. S. every year. Because of increased environmental awareness and under regulatory pressure for the reduction of volatile organic compound (VOC) emissions (e.g., Pollution Prevention Act of 1990), over half of the coatings and paints are now waterborne, and the trend for increasing the fraction of waterborne formulations continues. But even waterborne coatings and paints are not VOC-free, as they contain cosolvents, which may comprise up to 30% of the total liquid present. Furthermore, a number of these cosolvents are classified as hazardous air pollutants (HAP).Motivation: There is a need for both an overall reduction of VOC cosolvents and a replacement of HAP cosolvent by non-HAP ones. This need challenges the waterborne coating and paint formulations, but the drive for reformulation is confounded by the dearth of reports in the open literature regarding the effects of cosolvents on the aqueous solution behavior of associating polymers and surfactants. These amphiphiles are essential in stabilizing the resin and pigment colloidal constituents of coatings and paints and in conferring unique rheological properties (e.g., very high viscosity at rest and very low viscosity during the spraying or brushing application). Research objectives: It is the goal of the principal investigator to develop fundamental knowledge to support and guide the optimal formulation of waterborne coatings and paints. The specific objectives are the following: Objective 1 is to establish benchmarks by examining the phase behavior, structure, and dynamics of aqueous solutions consisting of associating polymers and surfactants representative of those used in coatings and paints. Objective 2 is to explore and quantify the effects of various cosolvents (e.g., different types of glycol ethers and other polar solvents) on the phase behavior, structure and dynamics of aqueous solutions consisting of associating polymers and surfactants. No such information is currently available in the open literature. Cosolvents can have a profound effect on the solution behavior and interactions of amphiphiles, and also modify the overall and local viscosity of the system. Objective 3 is to study the colloidal stability, structure, and rheology of colloidal suspensions of resins or pigments in aqueous-cosolvent media that contain associating polymers and surfactants. Such suspensions are very similar to the ones used in coatings and paints. Of explicit consideration here is the fact that the cosolvents can interact specifically (e.g., partition or swell) with the resins. Another very important issue to consider is the change in the overall and the local composition (and corresponding interactions) of the particle-polymer-surfactant-cosolvent mixture as the water and cosolvents evaporate following the application of the coating/paint.Potential Impact: The proposed research directly enables (i) the reduction of VOC cosolvents that are used in waterborne coatings and paints and the switch to cosolvents that are not HAPs, (ii) the optimal formulation of waterborne coatings and paints which would result in overall reduction of coating material (and associated energy costs) needed; (iii) at the same time the proposed work assists (by providing fundamental information) the ongoing efforts of replacing organic solvent-borne coatings and paints with environmentally friendlier waterborne formulations.

Abstractcts-0124848Alexandridis，对环境的水源性涂料的psuny水支持：在关联的聚合物，表面活性剂和胶体颗粒物式的相互作用介质之间的相互作用：涂料和涂料行业在全球范围内拥有500亿美元的市场。每年在美国出售超过10亿加仑的涂料和油漆。由于环境意识的提高和在调节压力下减少了挥发性有机化合物（VOC）排放（例如，1990年的污染预防法），现在超过一半的涂料和油漆是水生的，并且增加了水生的分数的趋势。但是，即使是水上的涂料和涂料也不是不含VOC的，因为它们含有助溶剂，最多可能占存在液体总液体的30％。此外，许多这些杂质被归类为危险空气污染物（HAP）。动机：需要总体上减少VOC cosvents，并用非HAP剂量替代HAP cosvent。这种需求挑战了水上涂层和涂料配方，但是重新制定的动力被公开文献中有关溶剂的影响的报道缺乏对关联聚合物和表面活性剂的水性溶液行为的影响而感到困惑。这些两亲物对于稳定涂料和油漆的树脂和色素胶体成分以及赋予独特的流变特性（例如，静止时的粘度非常高，在喷涂或刷牙时粘度很低）至关重要。研究目标：主要研究人员的目标是开发基本知识，以支持和指导水上涂料和油漆的最佳配方。具体目标是以下内容：目标1是通过检查由代表涂料和油漆的相关聚合物和表面活性剂组成的水溶液的相行为，结构和动力学来建立基准。目标2是探索和量化各种助溶剂（例如，不同类型的乙二醇和其他极性溶剂）对包括关联聚合物和表面活性剂的水溶液的相行为，结构和动力学的影响。目前，公开文献中没有此类信息。助溶剂可以对两亲物的溶液行为和相互作用产生深远的影响，并修改系统的整体和局部粘度。目标3是研究树脂或色素胶体悬浮液的胶体稳定性，结构和流变，其中包含相关聚合物和表面活性剂的水溶液培养基中。这样的悬架与涂料和油漆中使用的悬架非常相似。这里明确的考虑是一个事实，即助溶剂可以与树脂特定相互作用（例如，分区或膨胀）。要考虑的另一个非常重要的问题是，在应用涂层/油漆的应用后，粒子聚合物 - - 聚合物 - 反应剂 - 苏溶剂的混合物的整体和局部组成（以及相应的相互作用）的变化蒸发。最佳配方水上涂料和油漆，将总体上降低涂料材料（以及相关的能源成本）； （iii）与此同时，拟议的工作有助于（通过提供基本信息）持续的努力，以用环境友好的水上配方代替有机溶剂传播涂料和油漆。