Porous Polymer Membranes with Uniform Catalyst Distribution for Catalytic Removal of Formaldehyde from Indoor Air

摘要提案标题：具有均匀催化剂分布的多孔聚合物膜催化去除室内空气中的甲醛，提案编号：CTS-0625753，主要研究者：Ilona Kretzschmer，机构：纽约。翻译后摘要：该提案描述了一种方法，用于生成多孔的，圆柱形的聚合物膜，具有均匀的催化剂负载，这将导致新材料的开发，用于从室内空气流中分离和分解甲醛。待测试的科学假设是，通过模板技术嵌入膜孔中的少量催化剂保持对完全甲醛氧化的催化活性。为此，通过无电和/或物理气相沉积用金属氧化物催化剂部分改性聚苯乙烯（PS）颗粒。模板化的聚苯乙烯颗粒（i）在聚甲基丙烯酸甲酯毛细管内组装为胶体晶体，（ii）用聚氨酯（PU）预聚物溶液渗透，和（iii）固化，从而形成催化剂/PS/PU基质。随后用甲苯除去PS组分导致多孔膜结构，其中催化剂嵌入每个孔中。所提出的方法是非常通用的，因为孔径很容易通过模板颗粒的尺寸和用于渗透的预聚物的粘度来操纵。催化剂模板化颗粒的使用使得催化剂能够在膜的孔中精确分布。它提供了获得各种催化剂材料的途径，例如，甚至不溶性催化剂材料也可以均匀地分布在膜内。此外，每个孔的催化剂量由模板PS颗粒上的沉积量预先确定。此外，聚氨酯膜的光学透明性使得能够实现聚合。 使用光谱方法监测反应物吸附以及在紫外光照射下翻新旧膜。拟议工作的更广泛影响预计将影响膜技术。此外，PI在一个少数民族服务机构工作，与代表性不足的群体的学生合作。该项目将包括研究生和本科生的培训将与PI合作，并通过CCNY现有的计划提供支持。PI已证明她能够与本科生良好合作，这是拟议工作的一个有价值的方面。因此，该提案的教育方面是该提案的一个优势。

Abstract Proposal Title: Porous Polymer Membranes with Uniform Catalyst Distribution for Catalytic Removal of Formaldehyde from Indoor Air, Proposal Number: CTS-0625753, Principal Investigator: Ilona Kretzschmer, Institution: City University of New York. Abstract:The proposal describes a method for the generation of porous, cylindrical polymer membranes with a uniform catalyst loading that will lead to the development of new materials for the separation and decomposition of formaldehyde from indoor air streams. The scientific hypothesis to be tested is that small amounts of catalyst embedded in the pores of the membrane by a templating technique remain catalytically active towards complete formaldehyde oxidation. For this purpose, polystyrene (PS) particles are partially modified with a metal oxide catalyst by means of electroless and/or physical vapor deposition. The templated polystyrene particles are (i) assembled as a colloidal crystal inside a polymethylmethacrylate capillary, (ii) infiltrated with a polyurethane (PU) prepolymer solution, and (iii) cured leading to the formation of a catalyst/PS/PU matrix. Subsequent removal of the PS component with toluene leads to a porous membrane structure with catalyst embedded in each pore. The proposed methodology used is extremely versatile in that the pore size is easily manipulated via the size of the templating particles and by the viscosity of the prepolymer used for infiltration. The use of catalyst-templated particles enables the accurate distribution of catalyst in the pores of the membrane. It gives access to a large variety of catalyst materials, e.g., even insoluble catalyst material can be distributed uniformly within the membrane. In addition, the amount of catalyst per pore is predetermined by the amount deposition on the template PS particles. Further, the optical transparency of the polyurethane membrane enables the usage of spectroscopic methods for the monitoring of reactant adsorption as well as for refurbishing of used membranes under ultraviolet light exposure.The broader impacts of the proposed work are expected to impact membrane technology. In addition, the PI is at a minority serving institution and works with students from underrepresented groups. The project will include the training of a graduate student and undergraduates will work with the PI and be supported through pre-existing programs at CCNY. The PI has demonstrated that she can work well with undergraduate students, which is a valuable aspect of the proposed work. The education aspects of the proposal are thus a strength of the proposal.