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EAGER: Thermoplastic Foams Stabilized with Interfacially-Active Particles

EAGER：用界面活性颗粒稳定的热塑性泡沫

基本信息

批准号：
1252850
负责人：
Sachin Velankar
金额：
$ 9.44万
依托单位：
University of Pittsburgh
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2012
资助国家：
美国
起止时间：
2012-09-01 至 2014-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1252850&HistoricalAwards=false
关键词：
EAGER Thermoplastic Foams Stabilized Interfacially

项目摘要

This EArly-concept Grant for Exploratory Research (EAGER) grant provides funding to test whether interfacially-adsorbed particles can stabilize polymer foams. In aqueous systems, particles that adsorb or adhere to air/water surfaces are known to stabilize foams. The hypothesis of this proposal is that similar stabilization can be achieved when the bulk fluid is not water, but a molten polymer. The EAGER proposal seeks to evaluate whether particle stabilization is technically feasible in the real world using a commercial polymer and a foam process similar to that used industrially. Two kinds of experiments will be conducted. The first will be with polystyrene foams stabilized by spherical silica particles; these experiments will test whether particles can adsorb at the air/polymer interface even when the bulk fluid has a very high viscosity. The second will be with polypropylene foams stabilized with fluorinated particles; these will test whether particle-stabilized foams will survive even if kept under molten conditions for extended periods.Polymer foams such as polystyrene foam or polyurethane foam are commonly used for insulation, cushioning, packaging, and for reducing the weight of structural parts. Foam bubble coalescence restricts the range of materials that can be foamed and the processing conditions under which foaming can occur. Particle stabilization provides a new method for stabilizing foams with the potential for conducting foaming operations in a wider parameter space, and also foam materials traditionally regarded as unfoamable. The research to be conducted during this grant will clearly establish whether the concept of particle-stabilized foams is viable commercially; if so, the results will provide an strong foundation for further fundamental research on the mechanisms of particle-stabilization.

EARLY概念探索性研究补助金（EAGER）提供资金来测试界面吸附颗粒是否可以稳定聚合物泡沫。在含水系统中，已知吸附或粘附到空气/水表面的颗粒稳定泡沫。该提议的假设是，当本体流体不是水而是熔融聚合物时，可以实现类似的稳定。EAGER的提案旨在评估在真实的世界中，使用商业聚合物和类似于工业上使用的泡沫工艺，颗粒稳定化在技术上是否可行。将进行两种实验。第一个将是用球形二氧化硅颗粒稳定的聚苯乙烯泡沫;这些实验将测试颗粒是否可以吸附在空气/聚合物界面，即使当本体流体具有非常高的粘度。第二个是用氟化颗粒稳定的聚丙烯泡沫塑料;这将测试颗粒稳定的泡沫塑料即使在熔融条件下长时间保持也能存活。聚苯乙烯泡沫塑料或聚氨酯泡沫塑料等聚合物泡沫塑料通常用于绝缘、缓冲、包装和减轻结构部件的重量。泡沫气泡聚结限制了可以发泡的材料的范围和可以发生发泡的加工条件。颗粒稳定化提供了一种用于稳定泡沫的新方法，其具有在更宽的参数空间中进行发泡操作的潜力，并且还提供了传统上被认为不可发泡的泡沫材料。在此期间进行的研究将明确确定颗粒稳定泡沫的概念是否在商业上可行;如果是这样，结果将为进一步的基础研究提供坚实的基础。