용매의 반복 방향성 결정화를 통해 제작된 새로운 다공성재료Novel Porous Materials Prepared by Repeated Directional Crystallization of Solvent
- Authors
- 김현진; 이종휘
- Issue Date
- Jan-2015
- Publisher
- POLYMER SOC KOREA
- Keywords
- porous materials; polydimethylsiloxane; melt crystallization; directional freezing; ice templating
- Citation
- POLYMER-KOREA, v.39, no.1, pp 151 - 156
- Pages
- 6
- Journal Title
- POLYMER-KOREA
- Volume
- 39
- Number
- 1
- Start Page
- 151
- End Page
- 156
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/10068
- DOI
- 10.7317/pk.2015.39.1.151
- ISSN
- 0379-153X
2234-8077
- Abstract
- Herein, novel porous structures were fabricated from monomer solutions of dimethylsiloxane and benzene by directional crystallization in twice. First, a honeycomb-like structure was fabricated by 1st directional crystallization of solvent. By infiltration of the solution and subsequent 2nd directional crystallization, novel structures of different pores in the honeycomb-like structure were fabricated. The porous materials prepared by the repeated directional crystallization have higher indentation modulus and hardness than those of the samples prepared by single directional crystallization. When a higher solution concentration was used in 2nd directional crystallization, the maximum increase (indentation modulus: 2140% increase, indentation hardness: 2330% increase) was obtained. On the other hand, porosity and contact angle were lower in the samples from 2nd directional crystallization than those from 1st directional crystallization. A large decreases was observed, when a relatively high concentration was used in 2nd directional crystallization (porosity: 21% decrease, contact angle: 36% decrease).
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Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
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