Hydrophilic and Flexible Polyurethane Foams Using Sodium Alginate as Polyol: Effects of PEG Molecular Weight and Cross-linking Agent Content on Water Absorbency

Kwon, Oh-Jin; Oh, Seung-Taek; Lee, Sang-Do; Lee, Na-Ri; Shin, Chang-Hoon; Park, Jong-Shin

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자료유형: 학술저널

저자정보: Kwon, Oh-Jin (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Intelligent Textile System Research Center, Research Institute for Agriculture and Life Sci) Oh, Seung-Taek (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Intelligent Textile System Research Center, Research Institute for Agriculture and Life S) Lee, Sang-Do (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Intelligent Textile System Research Center, Research Institute for Agriculture and Life Sci) Lee, Na-Ri (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Intelligent Textile System Research Center, Research Institute for Agriculture and Life Scien) Shin, Chang-Hoon (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Intelligent Textile System Research Center, Research Institute for Agriculture and Life) Park, Jong-Shin (Department of Biosystems & Biomaterials Scien)

저널정보: 한국섬유공학회 Fibers and Polymers Fibers and polymers 제8권 제4호

발행연도: 2007.1

수록면: 347 - 355 (9page)

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Hydrophilic and flexible polyurethane foams were prepared using sodium alginate as a polyol, and characterized by optical microscopy, FT-IR spectroscopy, density measurements, volume swelling, and water absorbency. Optical microscopy revealed that the resulting cells were closed with round and elongated shapes. FT-IR confirmed that the urethane linkages were formed between the isocyanate and sodium-alginate. As an indirect measurement of porosity, the apparent density indicated an initial decrease followed by an increase with increasing glycerin content. The volume-swelling ratio was initially constant, followed by a gradual decrease with glycerin content. The volume swelling ratio increased with PEG molecular weight. The water absorbency initially increased, followed by a decrease with increasing glycerin content. The correlation ships between water absorbency, density, and volume-swelling ratio indicated that the absorbency was predominantly influenced by density when the PEG molecular weight was low and was greatly affected by the volume-swelling ratio when the PEG molecular weight was relatively high.

#Polyurethane foam #Urethane linkage #Apparent density #Volume-swelling ratio #Water absorbency

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Kwon, Oh-Jin

소속기관 Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Intell