Abstract:
본 발명은 일광견뢰도가 향상된 플라스틱을 제조하는 방법에 관한 것으로서, 보다 상세하게는 (a) 수수( Sorghum
bicolor )의 잎, 줄기 및 이의 혼합물로 구성된 군으로부터 선택된 어느 하나의 추출물을 플라스틱 성형재료에 혼입하여 플라스틱 성형물을 제조하는 단계; 및 (b) 상기에서 제조된 플라스틱 성형물을 금속염이 포함된 용액으로 처리하는 단계를 포함한다. 본 발명은 수수 부산물로부터 항균 및 항산화 활성을 갖는 천연색소를 추출하여 플라스틱과 혼합하는 방법을 제공하고 있으며, 이에 의해 생산된 플라스틱을 이용하여 천연색소를 함유한 인체친화적이고 위생적인 제품을 개발할 수 있다. 특히, 본 발명은 수수에서 추출한 색소로 착색된 플라스틱 사출물 제조를 위한 최적 가공법을 제공함에 있어, 천연색소의 문제점인 일광에 대한 낮은 안정도를 높이기 위해 금속염과의 최적 가공조건을 확립함으로써 천연색소로 착색된 제품의 완성도를 높일 수 있다.
Abstract:
The present invention relates to a polymer micelle-medicine complex based on a cellulose-graft-polylactide-based amphiphilic polymer and to a method for producing the same. More specifically, the polymer micelle-medicine complex includes an amphiphilic copolymer having a hydrophilic block including cellulose and a hydrophobic block including polylactide and is formed in a core-shell structure consisting of a hydrophobic core unit and a hydrophilic shell unit. Prednisolone acetate which is a refractory drug is encapsulated in the core unit of the core-shell structure so as to constitute the polymer micelle-medicine complex. The polymer micelle-medicine complex according to the present invention effectively solubilizes the refractory drug and changes the molecular variants of the amphiphilic copolymer so that a micelle having improved stability is produced. Accordingly, the encapsulation efficiency of the refractory drug is maximized and releasing behavior can be easily controlled.
Abstract:
PURPOSE: A fabrication method of monodisperse microball-shaped hydrogel particles is provided to prepare polymer particles using relatively inexpensive water-soluble dispersing stabilizers and a large amount of water as a polymerization solvent through a single process. CONSTITUTION: A fabrication method of monodisperse microball-shaped hydrogel particles comprises the steps of: forming monodispersed polyvinyl acetate microspheres using dispersion polymerization of vinyl acetate monomers; and saponifying the polyvinyl acetate microspheres from a dispersing medium in the same arrangement state so that the polyvinyl acetate microspheres have a dual structure of a polyvinyl acetate/polyvinyl alcohol shell.
Abstract:
The present invention relates to a mask pack using temperature-responsive sol-gel transfer hydrogel and, more specifically, to a temperature-responsive mask pack manufactured by mixing a hydrophilic polymer or an amphipathic polymer including two or more phosphate groups and a multivalence cation corresponding to a negative charge of the phosphate group and aging, and including a sol-gel transfer hydrogel transferred from the sol state to the gel state at the temperature range of 10-50°C and skin active ingredients. The mask pack using temperature-responsive sol-gel transfer hydrogel according to the present invention uses the temperature-responsive hydrogel existing in the sol state at low temperatures and existing in the state transformation into the sol state at body temperatures, so that a large amount of skin active ingredients is rapidly spread on the skin at the beginning, and the hydrogel gelates by the skin temperature afterward to form a film. Therefore, the moisture retention maintains to minimize evaporation of the skin active ingredients, thereby improving absorption and usability of the skin active ingredients.