Abstract:
하기 화학식 1로 표시되는 수용성 포르피린 유도체를 포함하는 광역학치료용 수용성 나노구조체가 제공된다.
상기 식 중, R 1 및 R 2 는 각각 독립적으로 -H 또는 -CH 3 이고, R 3 및 R 4 는 각각 독립적으로 -OH, -OCH 3 , -NH 2 , -NHCH 3 , -NH(CH 3 ) 2 , -NHCOCH 3 , -N(COCH 3 ) 2 , -COR 5 , 또는 -CH 2 COR 5 (여기서, R 5 =-OH, -OCH 3 , -NH 2 , -NHCH 3 , 또는 -NH(CH 3 ) 2 )이고, m 및 n은 각각 독립적으로 21 내지 226의 정수이다.
Abstract:
PURPOSE: A metal hydroxide based flame retardant-silica nanostructure, a manufacturing method thereof, and a flame-resistant insulating material including thereof are provided to improve dispersibility within a polymer resin of the metal hydroxide based flame retardant. CONSTITUTION: A manufacturing method of a metal hydroxide based flame retardant-silica nanostructure comprises next steps: forming an emulsion solution; dispersing the metal hydroxide based flame retardant into basic silicate aqueous solution; and reacting silicate solution with the emulsion solution. The basic silicate includes more than one kind which is selected from lithium silicate, sodium silicate, potassium silicate, magnesium silicate and sodium silicate potassium. The metal hydroxide based flame retardant includes more than one kind which is selected from magnesium hydroxide, calcium hydroxide, and aluminium hydroxide. A content amount of the metal hydroxide based flame retardant is 4-40 parts by weight based on 100.0 parts by weight of the basic silicate solution. The metal hydroxide based flame retardant-mixing silica nanostructure includes 1-60 parts by weight of the metal-hydroxide group flame retardant based on 100.0 parts by weight of silica nanoparticle.
Abstract:
PURPOSE: A hydrogel is provided to give stimulation reaction by including negative polymers and positive ions and to maintain gel persistence. CONSTITUTION: A hydrogel comprises a hydrophilic or amphipathic polymer including two or more of phosphate(PO4 ^2) groups and polyhydric cation corresponding with negative charged phosphate (PO4^2). The polyhydric cation is selected from low molecular weight compound or polycation including more than 2 cations selected from -NH3 and -N2(CH3)3, and positive charged metal ion having more than bivalent, and combinations thereof. The hydrogel additionally includes 0-20 parts by weight of additive selected from NaCl, CaCl2, NaCSN, PEG and a combination thereof based on 100.0 parts by weight of membranous polymers.
Abstract:
PURPOSE: A manufacturing method of cellulose ester is provided to improve substitution efficiency of a substituent, by using ionic liquid/dimethyl sulfoxide co-solvent system, and to effectively controlling reactivity, by stabilizing viscosity of reaction system. CONSTITUTION: A manufacturing method of cellulose ester comprises: a step of preparing a first solution comprising cellulose dissolved into ionic liquid; a step of preparing a second solution comprising a cyclic ester based monomer dissolved into dimethyl sulfoxide; and a step of esterificating the cellulose through ring opening-graft polymerization of reactive solution which is formed by mixing the first solution and the second solution. The volume ratio of the ionic liquid to the dimethyl sulfoxide is 1:0.5 - 1:4.
Abstract:
PURPOSE: A method for manufacturing thermoplastic cellulose polyester is provided to prepare cellulose ester having various thermal characteristics satisfying heat resistance of end-products and environmental-friendliness. CONSTITUTION: A method for manufacturing thermoplastic cellulose polyester comprises the steps of: acetylating at least a part of a hydroxyl group of the cellulose in ionic liquid to form cellulose acetate; and consecutively performing the ring opening graft polymerization of cyclic ester to a residual hydroxyl group of the cellulose acetate without the separation of the cellulose acetate from the ionic liquid. The acetylation is performed so that the cellulose is 1.0 ~ 2.9 per glucose unit.
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.