WO2006067987A1 - 中性のキトサンヒドロゲルおよびその製造方法 - Google Patents
中性のキトサンヒドロゲルおよびその製造方法 Download PDFInfo
- Publication number
- WO2006067987A1 WO2006067987A1 PCT/JP2005/022764 JP2005022764W WO2006067987A1 WO 2006067987 A1 WO2006067987 A1 WO 2006067987A1 JP 2005022764 W JP2005022764 W JP 2005022764W WO 2006067987 A1 WO2006067987 A1 WO 2006067987A1
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- WO
- WIPO (PCT)
- Prior art keywords
- chitosan
- neutral
- chitosan hydrogel
- solution
- aqueous
- Prior art date
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- 229920001661 Chitosan Polymers 0.000 title claims abstract description 102
- 239000000017 hydrogel Substances 0.000 title claims abstract description 45
- 230000007935 neutral effect Effects 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002244 precipitate Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 7
- 239000011260 aqueous acid Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 3
- 101150064513 dsdX gene Proteins 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 29
- 239000000243 solution Substances 0.000 description 29
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 22
- 239000007864 aqueous solution Substances 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000003756 stirring Methods 0.000 description 11
- 229960000583 acetic acid Drugs 0.000 description 10
- 239000002253 acid Substances 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 238000005119 centrifugation Methods 0.000 description 7
- 230000006196 deacetylation Effects 0.000 description 7
- 238000003381 deacetylation reaction Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 238000000502 dialysis Methods 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000012153 distilled water Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000002537 cosmetic Substances 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 229920002101 Chitin Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- PQLVXDKIJBQVDF-UHFFFAOYSA-N acetic acid;hydrate Chemical compound O.CC(O)=O PQLVXDKIJBQVDF-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000002778 food additive Substances 0.000 description 2
- 235000013373 food additive Nutrition 0.000 description 2
- 229940093915 gynecological organic acid Drugs 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 238000000954 titration curve Methods 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- FBEHFRAORPEGFH-UHFFFAOYSA-N Allyxycarb Chemical compound CNC(=O)OC1=CC(C)=C(N(CC=C)CC=C)C(C)=C1 FBEHFRAORPEGFH-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241000238424 Crustacea Species 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000003266 anti-allergic effect Effects 0.000 description 1
- 230000003110 anti-inflammatory effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012062 aqueous buffer Substances 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 230000000850 deacetylating effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000000385 dialysis solution Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000005452 food preservative Substances 0.000 description 1
- 235000019249 food preservative Nutrition 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- -1 organic acid salt Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/736—Chitin; Chitosan; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/14—Preserving with chemicals not covered by groups A23B4/02 or A23B4/12
- A23B4/18—Preserving with chemicals not covered by groups A23B4/02 or A23B4/12 in the form of liquids or solids
- A23B4/20—Organic compounds; Microorganisms; Enzymes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/04—Dispersions; Emulsions
- A61K8/042—Gels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q5/00—Preparations for care of the hair
- A61Q5/06—Preparations for styling the hair, e.g. by temporary shaping or colouring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/05—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media from solid polymers
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
- C08J2305/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
Definitions
- the present invention relates to a neutral chitosan hydrogel and a method for producing the same.
- Chitosan which is a natural polymer, is a deacetylated product (j8-1, 4-poly D-darcosamine) of chitin (j8-1, 4, poly-N-acetyl-D darcosamine) that also provides crustacean strength.
- Chitosan is excellent in biocompatibility and has a molecular weight of about 500,000.
- the properties of chitosan include biodegradability, antibacterial properties, anti-inflammatory properties, moisturizing properties, and antiallergic properties.
- chitosan is safe for the human body and the environment, many pharmaceuticals, cosmetics, hair styling products, food additives, fibers, membranes, etc., containing chitosan have been developed.
- chitosan is completely insoluble in common organic solvents and is not completely dissolved in water.
- the organic acid salt of chitosan is water soluble.
- chitosan dissolves only slowly in hydrochloric acid and not in nitric acid or sulfuric acid. Therefore, as a method for dissolving chitosan, a method of dissolving in an aqueous solution containing various organic acids (Patent Documents 1 to 4) and a method of dissolving in an aqueous buffer solution of organic acids (Patent Document 5) have been proposed. !
- chitosan powder has been generally used as an antibacterial agent or cosmetic product in the form of an aqueous solution of an organic acid such as formic acid, acetic acid, acidic amino acid, ascorbic acid or an inorganic acid such as carbonic acid.
- organic acid such as formic acid, acetic acid, acidic amino acid, ascorbic acid or an inorganic acid such as carbonic acid.
- these acidic chitosan solutions have poor viscosity stability (molecular weight stability) at room temperature, so in order to perform the required functions, they must be stored as chitosan powder and dissolved immediately before use. It ’s nasty.
- the molecular weight of the chitosan is reduced with time even at room temperature, and the viscosity of the solution cannot be maintained.
- a filtration device or the like is required in addition to the dissolution cake.
- the characteristics of chitosan include organic substance aggregation and antibacterial properties (particularly, an action that inhibits the growth of bacteria such as Escherichia coli).
- Powerful antibacterial action has a molecular weight of 6,000 It is exhibited in the above cases, but not at a molecular weight of about 4,000.
- Patent Document 1 JP-A-6-319517
- Patent Document 2 JP-A-11 193301
- Patent Document 3 Japanese Patent Laid-Open No. 11-199601
- Patent Document 4 Japanese Patent Laid-Open No. 2000-290187
- Patent Document 5 JP-A-9-110634
- An object of the present invention is to provide a chitosan hydrogel that can be stably stored for a long time near room temperature and that can be completely and effectively dissolved by a very small amount of acid.
- the present invention provides a neutral chitosan hydrogel substantially having water and chitosan power.
- the chitosan hydrogel of the present invention has almost no acid odor.
- the moisture content of strong chitosan hydrogel is preferably 50% to 96% by weight, more preferably 94% to 96% by weight.
- the first method for producing a neutral chitosan hydrogel of the present invention has the following steps.
- step (ii) adjusting the pH of the aqueous chitosan solution in step (i) from neutral to alkaline
- step (iv) A step of washing the precipitate collected in step (iii) with water until the pH becomes neutral.
- the second method for producing a neutral chitosan hydrogel of the present invention includes the following steps.
- step (ii) adjusting the pH of the aqueous chitosan solution in step (i) from neutral to alkaline
- step ( ⁇ ′) Step of dialyzing the liquid obtained by dispersing the precipitate collected in step (iii) against water until the pH becomes neutral.
- the neutral chitosan hydrogel according to the present invention can be obtained by centrifuging or filtering.
- the moisture content can be changed to a desired value.
- the chitosan hydrogel of the present invention is homogeneous and neutral, has no acid odor, does not contain salt, and can be stored at room temperature for a long time. Moreover, the chitosan hydrogel of the present invention is completely dissolved by a very small amount of acid. Therefore, the application of chitosan can be expanded by the present invention.
- Fig. 1 is a graph showing changes in viscosity with time when chitosan hydrogel is dissolved in hydrochloric acid.
- FIG. 2 is a graph showing the difference in viscosity change when chitosan hydrogel is dissolved in hydrochloric acid and acetic acid.
- Fig. 3-1 shows the titration curve of chitosan hydrogel with acetic acid.
- Fig. 3-2 is a titration curve of chitosan hydrogel with hydrochloric acid.
- the source of chitosan used as a raw material for the preparation of the neutral chitosan hydrogel according to the present invention (hereinafter referred to as raw chitosan) is not particularly limited. It can be obtained by deacetylating the chitin that is produced, or it can be commercially available.
- the form of the raw material chitosan is preferably solid, more preferably flaky, and still more preferably powder.
- the deacetylation degree of the raw material chitosan is preferably about 75 to 98%.
- the molecular weight of the raw chitosan is preferably about 10,000 to 200,000, more preferably about 10,000 to 75,000, and more preferably about 10,000 to 40,000!
- water is preferably deionized water or distilled water.
- neutral is ⁇ 6.0 to 7.5, more preferably ⁇ 6.8 to 7.2.
- the “chitosan hydrogel” refers to a gel-like substance composed of water and chitosan in which chitosan is present substantially uniformly.
- the deacetylation concentration and molecular weight of chitosan present in the neutral chitosan hydrol according to the present invention are substantially the same as the deacetylation degree and molecular weight of the raw material chitosan. That is, the degree of deacetylation and the molecular weight are determined in the preparation process of chitosan hydrogel. Does not change substantially.
- the water content of the neutral chitosan hydrogel according to the present invention is preferably 50 to 96% by weight, more preferably 80 to 96% by weight, and particularly preferably 94 to 96% by weight.
- the neutral chitosan hydrogel according to the present invention can be changed in water content to a desired value by centrifugation or filtration.
- step (0) chitosan is dissolved in an aqueous acid solution.
- Chitosan is dissolved in an acid aqueous solution in an amount of about 0.5 wt% to 4 wt%, preferably about 1 wt% to 4 wt%, although the type of acid is not particularly limited, and examples include acetic acid, hydrochloric acid, and lactic acid. If glacial acetic acid is used, its concentration is preferably about 4% by weight, more preferably 2-6% by weight.
- the method for dissolving chitosan in the acid aqueous solution is not particularly limited, and a conventional method such as stirring may be used.
- the melting temperature may be room temperature, for example, 15 to 40 ° C.
- the dissolution time by stirring varies depending on the shape, molecular weight, and deacetylation degree of the raw material chitosan, but is generally 4 to 5 hours. It is preferable to dissolve the chitosan until it is substantially uniform. At this time, the insoluble part may be removed by filtration.
- the pH of the aqueous chitosan solution obtained in step (0) is about 3-4.
- step (ii) the pH of the obtained chitosan aqueous solution is adjusted to neutral to alkaline.
- “Neutral to alkaline” in this step is pH 7 to 12, preferably pH 8 to 10.
- the pH is adjusted by a conventional method, for example, addition of a basic substance, preferably by dropwise addition of an aqueous solution of the basic substance. At this time, it is preferable to vigorously stir the aqueous solution.
- basic substances include NaOH, KOH, NH OH and the like.
- step (ii) for example, while stirring a chitosan aqueous solution vigorously with a mixer (stirring speed: about 10,000 to 12, OOOrpm), a 1 to 10M NaOH aqueous solution is adjusted to a pH of 7 to 12. Dripping. As the solution approaches alkalinity, a white precipitate forms.
- the white precipitate thus formed is collected (step (iii)).
- the method for collecting the precipitate is not particularly limited, and examples thereof include centrifugation and filtration.
- the pH of the strong precipitate is neutralized (step (iv) or (iv ')).
- the collected precipitate is washed with water until the pH is neutral, i.e. pH 6.0 to 7.5, preferably 6.8 to 7.2.
- the washing method is not particularly limited, but a method of repeatedly stirring the suspension obtained by dispersing the precipitate in water and collecting the precipitate by centrifugation, filtration, etc., or adding a large amount of water to the precipitate in the column. Such as passing through.
- the neutral chitosan hydrogel is obtained by centrifuging the liquid in which the gel containing the washed chitosan is suspended and adjusting the concentration to a desired concentration.
- the precipitate collected in step (m) is dispersed in water, the dispersion is placed in a dialysis membrane, and the pH is neutral, that is, pH 6.0 to 7.5, Dialyze against water until 6.8-7.2.
- the amount of the dispersion used for dialysis is preferably about 0.1 to 1.0% by volume with respect to the dialysis solution (ie water).
- the chitosan content in the dispersion is preferably about 0.1 to 2.0% by weight.
- the number of dialysis varies depending on the amount of dialysate and the pH of the dispersion, but is preferably about 2 to 5 times.
- the dialysis temperature may be room temperature, for example, about 10 to 20 ° C.
- a neutral chitosan hydrogel can be obtained by adjusting the neutralized dispersion to a desired concentration by centrifugation.
- the neutral chitosan hydrogel obtained by the present invention can be stably stored at room temperature.
- the neutral chitosan hydrogel of the present invention is substantially completely easily dissolved in an aqueous acid solution such as hydrochloric acid, lactic acid, and acetic acid to form a transparent aqueous chitosan solution.
- the neutral chitosan hydrogel hydrochloric acid solution obtained by the present invention is stable at room temperature.
- the obtained transparent solution was filtered and allowed to stand at room temperature, and the change in viscosity with time was followed. As shown in Fig. 2, the viscosity (ie, chitosan molecular weight) decreased significantly with time.
- chitosan is more stable in an aqueous hydrochloric acid solution than in an aqueous acetic acid solution.
- Example 2 The neutral chitosan hydrogel obtained in Example 2 was subjected to pH titration with hydrochloric acid and acetic acid. As a result, both pKa values were about 6.4, indicating that there was no change in the properties of chitosan as an aqueous hydrochloric acid solution or an aqueous acetic acid solution.
- the neutral chitosan hydrogel according to the present invention comprises a pharmaceutical, a cosmetic, a hairdressing agent, a food additive
- the chitosan hydrogel of the present invention can be used as a food preservative by making it into an aqueous solution or by directly applying it to food such as meat. it can.
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Epidemiology (AREA)
- Birds (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- General Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Colloid Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Cosmetics (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-369515 | 2004-12-21 | ||
JP2004369515A JP4813054B2 (ja) | 2004-12-21 | 2004-12-21 | 中性のキトサンヒドロゲルおよびその製造方法 |
Publications (1)
Publication Number | Publication Date |
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WO2006067987A1 true WO2006067987A1 (ja) | 2006-06-29 |
Family
ID=36601589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/022764 WO2006067987A1 (ja) | 2004-12-21 | 2005-12-12 | 中性のキトサンヒドロゲルおよびその製造方法 |
Country Status (2)
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JP (1) | JP4813054B2 (ja) |
WO (1) | WO2006067987A1 (ja) |
Cited By (6)
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CN101215389B (zh) * | 2008-01-14 | 2010-06-02 | 浙江大学 | 一种壳聚糖水凝胶及其制备方法 |
CN102755662A (zh) * | 2012-07-25 | 2012-10-31 | 福州乾正药业有限公司 | 一种复合壳聚糖凝胶膜及其制备方法 |
CN103480030A (zh) * | 2013-09-09 | 2014-01-01 | 浙江大学 | 热凝胶化-近中性水浴制备高强度壳聚糖水凝胶的方法 |
CN110669232A (zh) * | 2019-09-10 | 2020-01-10 | 北京联合大学 | 一种吸油脂性水凝胶的制备方法及其应用 |
CN112169020A (zh) * | 2020-09-22 | 2021-01-05 | 福建吉特瑞生物科技有限公司 | 一种大块壳聚糖材料及其制备方法 |
CN114685823A (zh) * | 2021-12-13 | 2022-07-01 | 河南健康广济生物技术有限公司 | 一种抗卷曲壳聚糖水凝胶膜及其制备方法和慢性伤口敷料 |
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JP5696928B2 (ja) * | 2010-11-04 | 2015-04-08 | 学校法人 関西大学 | 非水系電解質、これを含む蓄電デバイスおよび非水系電解質の製造方法 |
CN103524795A (zh) * | 2012-07-06 | 2014-01-22 | 中国科学院大连化学物理研究所 | 一种温敏型可注射壳聚糖水凝胶产品及其应用 |
KR102099269B1 (ko) * | 2020-01-22 | 2020-04-10 | 신승연 | 2-파트 스킨 케어 제제 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02235905A (ja) * | 1989-02-09 | 1990-09-18 | Hoechst Ag | 活性キトサンの製造方法および活性キトサンをキトサン誘導体の製造に使用する方法 |
JP2003128705A (ja) * | 2001-10-29 | 2003-05-08 | Kyowa Technos:Kk | 低分子キトサンおよびその製造方法 |
JP2004501235A (ja) * | 2000-05-12 | 2004-01-15 | ザ プロクター アンド ギャンブル カンパニー | キトサン粒子の調製プロセス |
JP2006045299A (ja) * | 2004-08-03 | 2006-02-16 | Tottori Prefecture | キトサンゲル、及びキトサンゲルの製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2990248B2 (ja) * | 1997-06-18 | 1999-12-13 | 鳥取県 | 非晶質の水溶性部分脱アセチル化キチンの製造方法 |
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2004
- 2004-12-21 JP JP2004369515A patent/JP4813054B2/ja not_active Expired - Fee Related
-
2005
- 2005-12-12 WO PCT/JP2005/022764 patent/WO2006067987A1/ja not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101215389B (zh) * | 2008-01-14 | 2010-06-02 | 浙江大学 | 一种壳聚糖水凝胶及其制备方法 |
CN102755662A (zh) * | 2012-07-25 | 2012-10-31 | 福州乾正药业有限公司 | 一种复合壳聚糖凝胶膜及其制备方法 |
CN103480030A (zh) * | 2013-09-09 | 2014-01-01 | 浙江大学 | 热凝胶化-近中性水浴制备高强度壳聚糖水凝胶的方法 |
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JP4813054B2 (ja) | 2011-11-09 |
JP2006176584A (ja) | 2006-07-06 |
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