Chemicals for cosmetics, including skin, the skin absorbs some of the research in the field of science or pharmacy recently, about the environment and the health of the heightened interest in skin absorption. Many other human attributes and absorption evaluation studies are underway in various areas. This study were used rats and carried out to find out the effects of commercial permanent wave products to skin which are composed with thioglycolic acid and bases. Results were as follows. Permanent wave penetrated to 3 hours later with steady state in skins and was not significant changeable after 20hr later. In case of neutralizer with thioglycolic acid lag time and permeability coefficient in healthy skin were 3.32hr and 0.101μg/cm2/hr, in old skin were 3.08hr and 0.117μg/cm2/hr, and in wounded skin were 3.02hr and 0.166μg/cm2/hr. In conclusion, lag time and permeability coefficient in old skin and wounded skin were faster than healthy skin. In vivo, We were studied to general time and method of permanent wave. We found out that fine wrinkle and rash of skin were changeable in the case of treating with permanent wave drugs than normal skin.

본 연구에서는 불소계 고분자인 PVdF (poly(vinylidene fluoride))에 HFP (hexafluoropropylene)가 결합된 공중합체인 PVdF-HFP로 충전용 이차전지의 분리막으로 쓰이는 다공성 막을 상전이 방법으로 제조하였다. 용매인 DMF (N,N-dimethylformamide)에 PVdF-HFP를 단일상으로 녹인 후 깨끗한 유리판에 캐스팅하여 막을 얻었다. 기공은 증류수로 채워진 응고조에서 용매-빈용매 교환으로 형성되어진다. 얻어진 분리막에서 가장 높은 공극률은 60%로 얻어졌다. 시차주사현미경(scanning electron microscopy, SEM)을 이용하여 분리막의 단면 관찰을 통해 다공성을 확인하였고 UTM (universal testing machine)을 이용하여 측정된 분리막의 인장강도는 PVdF-HFP 30 wt%에서 최대 6.57 MPa의 값을 나타내었다.