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Temperature responsive intelligent facial mask and method for preparing same

一种温度响应性、智能的技术，应用在医药配方、粘性敷料、梳妆用配制品等方向，能够解决不利面膜应用等问题，达到满足个性要求、提高强度、赋予抗菌性的效果

Inactive Publication Date: 2006-12-27
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PNIPAAm gel will be strongly dehydrated above the LCST (see C.K.Han, Y.H.Bae, Inverse thermally-reversible gelation of aqueous N-isopropylacrylamidecopolymer solution, Polymer 1998, 39: 2809-2814), too much water loss in a short period of time is not conducive to facial masks Applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] Preparation of AVPU

[0033] With 10-60 parts by weight of polyether diol, 3-20 parts by weight of carboxyl-containing diol, and 12-30 parts by weight of aliphatic diisocyanate, under the protection of nitrogen in 50-200 parts by weight of solvent, React at 80°C to obtain isocyanate-terminated prepolymer. On this basis, add 5-11 parts by weight of hydroxyacrylate monomer, and continue to react at 60-70°C for 5 hours to obtain an anionic polymer containing vinyl polymeric double bonds. Polyurethane macromonomer (AVPU). The components are as follows:

[0034] 10-60 parts by weight of polyether diol

[0035] Carboxyl-containing glycol 3-20 parts by weight

[0036] 12-30 parts by weight of aliphatic diisocyanate

[0037] 5-11 parts by weight of hydroxyacrylate monomer

[0038] Solvent 50-200 parts by weight

[0039] (2) Cross-linked polyisopropylacrylamide / anionic polyurethane gel-graft-cellulose non-woven fabric

[0040] Take 0.2-2 parts by weight of AVPU obtained a...

Embodiment 1

[0064] 10 grams of polytetrahydrofuran ether glycol, 3.13 grams of dimethylolpropionic acid and 50 grams of dimethylformamide were added to a four-necked flask with a stirrer, a thermometer and a reflux condenser, and the reactants were dissolved and mixed evenly. Nitrogen was blown for 15 minutes, 11.12 g of isophorone diisocyanate was added, and reacted at 80° C. for 4 hours. Cool down to 60-70 DEG C then, add 4.77 grams of methacrylic acid-2-hydroxyl ethyl ester, react and continue for 5 hours, obtain colorless to pale yellow, viscous anionic polyurethane macromonomer containing polymerizable double bonds ( AVPU) spare.

[0065] Take 0.5 g of AVPU and add it to a four-necked bottle, add 0.25 g of triethylamine dropwise, stir for 5 minutes, add 60 g of deionized water dropwise, stir vigorously for 10 minutes, add 2.5 g of isopropylacrylamide, 0.2 g of methylene After dissolving bisacrylamide, add 0.05 g of ammonium persulfate and 0.03 g of tetramethylethylenediamine, stir eve...

Embodiment 2

[0073] Take 0.8 g of AVPU synthesized in Example 1 and put it into a four-neck flask, add 0.3 g of triethylamine dropwise, stir for 5 minutes, add 60 g of deionized water dropwise, stir vigorously for 10 minutes, add 2.5 g of isopropylacrylamide , 0.2 gram of methylene bisacrylamide, after dissolving, add 0.05 gram of ammonium persulfate, 0.03 gram of tetramethylethylenediamine, stir evenly and transfer to a pre-prepared triangular flask with 200 mg of cellulose non-woven fabric Inside, deoxygenate by nitrogen for 20 minutes, seal it, and let it stand at room temperature for 8 hours.

[0074] Wash the non-woven fabric-graft-polyisopropylacrylamide / polyurethane hydrogel prepared above with a large amount of deionized water three times to remove unreacted monomers and impurities, and then soak for 48 hours, every 3-5 hours Change the water once for further refinement.

[0075] The refined gel was immersed in 10 grams of hydrochloric acid / tetramethylethylenediamine buffer (pH4.7...

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Abstract

A temperature responsive intelligent face mask and preparation method thereof wherein a chitosan modified temperature sensitive isopropyl acryl amide / polyurethane copolymer hydrogel is grafted to a cellulose fiber. The advantages lie in that the intelligent hydrogel can swell and contract reversibly near body temperature, and the high-temperature dehydration phenomenon may be inhibited by the introduction of the polyurethane, the non-woven fabric exerts a supporter function by grafting the isopropyl acryl amide / polyurethane copolymer hydrogel thereto and as a result the strength of the gel is increased, the coupling of the natural chitosan to external surface of the gel film not only improves the face mask comfort, the skin affinity, but also offers the bacteria resistant ability. The gel face mask carries multiple nutrients and the carried nutrient and moisture may release intelligently through gel contraction under body temperature, meanwhile the temperature responsive intelligent face mask can be utilized in a plurality of times to satisfy the personalized requirement.

Description

technical field [0001] The invention relates to environment-sensitive special hydrogels, in particular to a temperature-responsive chitosan-modified grafted on the surface of cellulose fabrics with temperature-sensitive isopropylacrylamide / polyurethane copolymer hydrogel smart masks and its preparation method. technical background [0002] Hydrogel is a cross-linked polymer network that absorbs water and swells. It has some characteristics of solid and liquid, and it has a certain shape and can produce great deformation. Under the external environment such as temperature, pH value, ionic strength, chemical substances, pressure and photoelectric stimulation, if the hydrogel can produce reversible deformation and volume change, it is called environmentally sensitive (Environmental sensitive) polymer gel. In addition to being hydrophilic, hydrogels have good permeability, allowing the passage of water and oxygen. And the moderately cross-linked gel feels soft and elastic, sim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/02A61Q19/00A61F13/02A61L15/28
CPCA61Q19/00Y10T442/2525A61K2800/54A61K8/736A61K8/042Y10T442/2311A61K8/0212A61K8/8158
Inventor 胡金莲刘文广刘保华
Owner THE HONG KONG POLYTECHNIC UNIV
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