본 연구에서는 상전이법을 이용하여 P(VDF-co-HFP) 분리막의 구조를 조절하였다. Macrovoid 없는 구조를 얻기 위하여 다양한 조건에서 비용매유도상전이(NIPS) 공법으로 분리막을 제막하였으나 고분자의 낮은 결정화 속도로 인해 macrovoid가 생성된다는 것을 관측하였다. 이를 극복하기 위해 증발유도상전이법(EIPS)과 증기유도상전이법(VIPS)을 도입하였으 며 NIPS공법과 함께 제막되었을 때 이상적인 구조를 얻을 수 있다는 것을 확인하였다.

Power plants consume a major fraction of water to generate electricity, typically in the range between 30 - 50% of all fresh water sources. Most of the water from plants are lost with heat through stack and cooling towers. It has been reported that if 20% of these water can be recycled, power plants can be self-sustainable, allowing them to be located with higher flexibility. Membrane contactor can be an effective solution to harness this source of water, but most of the work have been focused on dense vapor separation membranes with limited success. In this work, we investigated potential application of membrane condenser technology to harness fresh water from power plants.