I/UCRC: Collaborative Fundamental Research: Foaming and Frothing Behavior of Green Surfactants and Fine Particulate Systems

项目主任的颗粒和表面活性剂体系推荐中心提案#1230367&amp；1230680莫迪吉尔和索马桑达兰该提案寻求为位于佛罗里达大学(牵头站点)和哥伦比亚大学的伙伴和表面活性剂体系中心(CPaSS)提供资金。基础研究的资金申请是由NSF批准的申请授权的，NSF 11-570。征集邀请研究所/大学合作研究中心提交支持行业定义的基础研究的建议。这项建议将研究绿色表面活性剂的发泡性能，以及细颗粒的存在对发泡和起泡行为的影响。该提案的主要目标是：1)了解绿色表面活性剂配方和表面改性细颗粒的发泡/消泡性能的物理化学方面；2)研究液-气和固-液界面上的表面活性剂薄膜的结构；以及3)开发有效的发泡/消泡配方。实验将涉及泡沫/泡沫稳定性的宏观测量，以及对绿色表面活性剂在泡沫液体膜中的分子组织的振动FTIR和拉曼光谱研究。一种新的FTIR光谱方法将被用来获取不稳定气泡的光谱。将耗散粒子动力学(DPD)计算模拟用于模拟绿色表面活性剂体系。将对DPD模型进行调整，以便于解释实验数据。这项研究的结果将促进对控制绿色表面活性剂配方及其与改性细颗粒混合物对溶液和悬浮液的发泡性、起泡性和消泡性的拮抗和协同作用的参数的基本理解。对拟议基础研究感兴趣的行业包括绿色表面活性剂生产商、矿物加工、石油、涂料和涂料行业、生化分离、化妆品、个人护理和家居用品行业，以及对环境修复感兴趣的行业。具体地说，全面了解绿色表面活性剂的泡沫稳定性将导致为其在个人护理和化妆品产品中的应用开发新的配方，而关于细颗粒与绿色表面活性剂相互作用的知识将导致开发具有成本效益的发泡、发泡和消泡系统。

Program Director's Recommendation Center for Particulate and Surfactant Systems (CPaSS) Proposal # 1230367 & 1230680 Moudgil and Somasundaran This proposal seeks funding for the Center for Partculate and Surfactant Systems (CPaSS) located at the University of Florida (lead site) and Columbia University. Funding Requests for Fundamental Research are authorized by an NSF approved solicitation, NSF 11-570. The solicitation invites I/UCRCs to submit proposals for support of industry-defined fundamental research. This proposal will investigate foaming properties of green surfactants and the effects of presence of fine particles on foaming and frothing behavior. The primary goals of the proposal are 1)to understand physico-chemical aspects of the foaming/defoaming properties of green surfactant formulations and surface modified fine particles; 2)study the structure of surfactant films at the liquid-gas and solid-liquid interfaces; and 3)to develop efficient foaming/defoaming formulations. Experiments will involve the macroscopic measurements of foam/froth stability and a vibrational FTIR and Raman) spectroscopic study of the molecular organization of green surfactants in the liquid films of foams. A new FTIR spectroscopic method will be employed to acquire spectra of unstable bubbles. Dissipative Particle Dynamics (DPD) computational simulation will be used to simulate the green surfactant systems. The DPD modeling will be adapted to facilitate interpretation of experimental data. Results of this study will advance the fundamental understanding of the parameters that govern the antagonistic and synergistic effects of green surfactant formulations and their mixtures with modified fine particles on the foamability, frothing, and defoaming of the solutions and suspensions. The industries interested in the proposed fundamental studies include green surfactant producers, mineral processing, petroleum, paints and coatings industries, biochemical separation, cosmetics, personal care, and household products industries, as well as those interested in the environmental remediation. Specifically, a comprehensive understanding of the foam stability of green surfactants will lead to the development of new formulas for their applications in personal care and cosmetics products, while the knowledge about the fine particles interactions with green surfactants will lead to the development of cost effective foaming, frothing, and de-foaming systems.