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새로운 Polyamide 한외여과막의 제법과 특성
Synthesis and Properties of Novel Polyamide Membrane for Ultrafiltration
HWAHAK KONGHAK, June 1989, 27(3), 339-347(9), NONE
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Abstract
새로운 고분자 분리막 소재로 저온용액 중축합에 의해 방향족(아미드-에스테르)폴리머를 합성하여 한외여과막으로서의 특성평가를 하였다. 폴리머의 분자구조 및 물성은 원소분석, 적외선 스펙트럼분석, 열중량분석기, X-선 회절분석에 의해 확인하였다. 제막용액은 리툼클로리드를 함유시킨 N, N-디메틸아세트 아미드(DNAc), N-메틸-2-피롤리돈(NMP)을 용매로 제조하여 유리판 위에서 유연법으로 제막하였다. 한외여과 특성평가는 용매증발과정, 응고액의 조성, 용매의 종류 등 제막조건과 용질농도, 조작압력, 용질분자량 등 투과조건 등을 변경하면서 검토하였다. 투과성이 좋고 분획성이 우수한 한외여과막의 최적제조조건을 구하였다. 주사전자현미경으로 모폴로지를 관찰하였다.
As an ultrafiltration membrane material, novel aromatic copoly(amide-ester)(ACAE) was synthesized by low temperature solution polycondensation. This copolymer was characterized by IR, EA, X-ray, TGA thermo-grams. Membranes were cast from polymer solution consisting of ACAE, one of solvents from the group of N, N-dimeth-ylacetamide(DMAc), N-methyl2-pyrrolidone(NMP) containing lithium chloride. The permeation characteristics were investigated with regard to the effect of membrane preparation variables such as evaporation process, the composition of mixed solvents used as gelation medium and of permeation conditions such as feed concentration, operating pres-sure, molecular weight of the feed solution. As the performance test, pure water flux, solute rejection, molecular weight cut off of membranes from different preparation condition were also investigated with the aid of scanning electron mi-croscope.