Abstract:
The porous hollow fiber membrane comprises a porous network-like layer (3) on the inner surface, a porous skin layer (1) on the outer surface having oval or circular macropores, and macrovoids (2) in the middle of the layers (1,3). The membrane has 0.3 g/den tenacity, at least 60% wet strength and 1,000-9,000 l/m3. hr. atm.. The layer (3) is formed by adding a water soluble polymer to the soln. of polysulfone and polar organic solvent to make a spinning soln, and spinning the spinning soln, an outer solidifying liquor and an inner solidifying agent, and then winding it. The spinning soln. is composed of 10-25 wt.% of polysulfone and 10-50 wt.% of polyethylene glycol, polyvinyl alcohol and/or polyvinyl pyrrolidone. The fiber membrane has a good water permeabicity.
Abstract:
본 발명은 산성가스 포집용 건식 흡착제 및 이의 제조방법에 관한 것이다. 본 발명에 따른 건식 흡착제는 산성가스를 효과적으로 포집할 수 있는 관능기인 아민을 다량 함유하는 단량체를 중합하여 높은 아민 밀도의 건식흡착제를 용이하게 제조할 수 있고, 고분자 골격 내의 아민기의 분포, 위치, 수 등을 제어할 수 있을 뿐만 아니라, 이산화탄소 흡착이 용이한 다량의 아민의 존재로 인해 높은 이산화탄소 흡착량을 나타낸다. 또한 아민기를 포함하는 단량체들이 지지체 표면 위에 공유결합 형태로 결합되어 있어 화학적 안정성이 뛰어나 이산화탄소의 흡·탈착이 반복되어도 초기의 흡착량을 유지할 수 있으므로, 산성가스 포집용 건식 흡착제로 유용할 수 있다.
Abstract:
본 발명은 퍼플루오로싸이클로부탄기를 포함하는 블록 공중합체, 그의 제조방법 및 이를 포함하는 전해질막에 관한 것이다. 본 발명에 따른 퍼플루오로싸이클로부탄기를 포함하는 블록 공중합체는 제조가 용이하고, 이를 포함하는 전해질막은 우수한 수소이온 전도도 및 기계적 물성을 가질 뿐만 아니라, 고분자 골격내에 산기(술폰산기 등)의 분포, 위치, 및 수 등의 제어가 가능하고, 산기의 증가에 따른 막 물성의 저하가 없어 다양한 막의 소재로 사용될 수 있으며, 특히 연료전지의 전해질막 등에 바람직하게 사용될 수 있는 장점이 있다. 퍼플루오로싸이클로부탄기, 후술폰화, 멀티블록 공중합체, 전해질막, 연료전지, 수소이온 전도도
Abstract:
A composite hollow fiber membrane which is excellent in permeability and selectivity relative to gas- and vapor-phased organic compounds and has an improved membrane area per unit volume at the same time is provided. A composite hollow fiber membrane for separating gas- and vapor-phased organic compounds comprises a polymer coating layer formed by coating a polymer solution comprising 10 to 30 wt.% of a siloxane-based polymer in which a double bond of a vinyl group-substituted polysiloxane polymer is crosslinked with a silane group of a polyhydrosiloxane polymer by hydrosilylation reaction on a surface of a hollow fiber microporous support with a pore size ranging from 3 to 30 nanometers and a permeability ranging from 5000 to 10000 GPUs(Gas Permeation Units). The polymer coating layer has a thickness of 2 to 10 mum. The siloxane-based polymer is obtained by crosslinking 80 to 90 wt.% of the vinyl group-substituted polysiloxane polymer with 10 to 20 wt.% of the polyhydrosiloxane polymer.
Abstract:
A mass production method for asymmetric high molecular hollow fiber membrane for gas separation is provided to avoid the use of volatile additives for reducing a time for removing foams from a high molecular solution, thereby realizing high speed spinning, and to realize asymmetric structure with a porous inner layer and a high transmissivity and high selectivity outer selection layer, thereby realizing separation of various gas with high efficiency. In a mass production method for asymmetric high molecular hollow fiber membrane for gas separation, 25-40wt% concentration of high molecules selected from polysulfone, polyethersulfone, polyimide, polyetherimide, polybenzimidazole, and polyamide is dissolved in a good solvent, of which a boiling point is 150-210‹C. An inside coagulant is formed of a good solvent having a boiling point in the range from 150 to 210‹C and a nonsolvent having a boiling point in the range from 80 to 290‹C. By contacting the result solution and the inside coagulant, insides of hollow fibers are coagulated. During the contact, spinning is carried out at a speed of 30-80m/min at a temperature of 80-200‹C for producing the hollow fibers. After drying the hollow fibers, surface of the hollow fibers are coated by a poly-dimethylsiloxane solution.