WO2025004723A1 - セルロース含有組成物及びその製造方法、並びに粘度調節方法 - Google Patents
セルロース含有組成物及びその製造方法、並びに粘度調節方法 Download PDFInfo
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- WO2025004723A1 WO2025004723A1 PCT/JP2024/020495 JP2024020495W WO2025004723A1 WO 2025004723 A1 WO2025004723 A1 WO 2025004723A1 JP 2024020495 W JP2024020495 W JP 2024020495W WO 2025004723 A1 WO2025004723 A1 WO 2025004723A1
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- 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
- A61K8/731—Cellulose; Quaternized cellulose derivatives
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/02—Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/02—Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
- C08B15/04—Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
- C08L1/04—Oxycellulose; Hydrocellulose, e.g. microcrystalline cellulose
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
- A61K2800/30—Characterized by the absence of a particular group of ingredients
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/41—Particular ingredients further characterized by their size
- A61K2800/413—Nanosized, i.e. having sizes below 100 nm
Definitions
- the present invention relates to a cellulose-containing composition, a method for producing the same, and a method for adjusting viscosity.
- Patent Document 1 discloses a method for producing cellulose nanofibers, which includes a step of producing oxidized cellulose by oxidizing a cellulose-based raw material using hypochlorous acid or a salt thereof with an effective chlorine concentration of 14 to 43% by mass, and a step of defibrating the oxidized cellulose to produce nanofibers.
- Patent Document 2 discloses a method for producing oxidized cellulose, which uses hypochlorous acid or a salt thereof with an effective chlorine concentration of 6 to 14% by mass, and oxidizes the cellulose-based raw material while adjusting the pH to a range of 5.0 to 14.0.
- the oxidation process is carried out without using N-oxyl compounds such as 2,2,6,6-tetramethyl-1-piperidine-N-oxy radical (TEMPO), so that no N-oxyl compounds remain in the cellulose fibers, which reduces the impact on the environment, etc.
- N-oxyl compounds such as 2,2,6,6-tetramethyl-1-piperidine-N-oxy radical (TEMPO)
- Patent Document 3 discloses oxidized cellulose, which is an oxidation product of a cellulose-based raw material with hypochlorous acid or a salt thereof, which is substantially free of N-oxyl compounds and has a degree of polymerization of 600 or less.
- Patent Document 4 discloses nanocellulose which is an oxide of a cellulose-based raw material with hypochlorous acid or a salt thereof, has an average fiber width of 1 nm or more and 200 nm or less, is substantially free of N-oxyl compounds, and has a zeta potential of -30 mV or less.
- the present invention aims to provide a composition that contains oxidized cellulose, which is an oxide of a cellulose-based raw material using hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and that has a suitably adjustable (or adjusted) viscosity.
- oxidized cellulose which is an oxide of a cellulose-based raw material using hypochlorous acid or a salt thereof
- nanocellulose which is a defibrated product of the oxidized cellulose
- the inventors have discovered that when a dispersion containing oxidized cellulose, which is an oxide of a cellulose-based raw material using hypochlorous acid or its salts, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, is mixed with a thickener, the viscosity increases significantly.
- oxidized cellulose which is an oxide of a cellulose-based raw material using hypochlorous acid or its salts
- nanocellulose which is a defibrated product of the oxidized cellulose
- a composition comprising cellulose and a thickening agent The cellulose contains oxidized cellulose, which is an oxide of a cellulose-based raw material with hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and is substantially free of N-oxyl compounds; Composition.
- a composition comprising cellulose and a thickening agent The cellulose includes oxidized cellulose having a structure in which the second and third hydroxyl groups of the glucopyranose ring are oxidized to introduce dicarboxy groups, and/or nanocellulose which is a defibrated product of the oxidized cellulose. Composition.
- composition according to claim [1] or [2], wherein the thickener is a thickening polysaccharide.
- the thickener has a hydrophobic region capable of hydrophobic interaction with the oxidized cellulose.
- the amount of the thickener is 0.1 to 40% by mass relative to the mass (solid content) of the oxidized cellulose.
- the composition according to [6], wherein the amount of the salt is 0.01 to 10% by mass relative to the composition.
- the cellulose comprises nanocellulose.
- the composition according to [12], wherein the viscosity of the aqueous composition is 0.01 to 1000 Pa ⁇ s.
- a composition comprising cellulose and a thickening agent, The cellulose contains oxidized cellulose, which is an oxide of a cellulose-based raw material with hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and is substantially free of N-oxyl compounds;
- the pH of the composition is in the range of 0 to 14.0.
- a composition comprising cellulose and a thickening agent,
- the cellulose includes oxidized cellulose having a structure in which the second and third hydroxyl groups of the glucopyranose ring are oxidized to introduce dicarboxy groups, and/or nanocellulose which is a defibrated product of the oxidized cellulose,
- the pH of the composition is in the range of 0 to 14.0.
- Composition [17] The composition according to any one of claims [1] to [16], wherein the composition is a cosmetic. [18] 1.
- a method for producing a composition comprising: The method includes the step of mixing cellulose and a thickener, The cellulose contains oxidized cellulose, which is an oxide of a cellulose-based raw material with hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and is substantially free of N-oxyl compounds; Manufacturing method. [19] 1.
- a method for producing a composition comprising: The method includes the step of mixing cellulose and a thickener, The cellulose includes oxidized cellulose having a structure in which the second and third hydroxyl groups of the glucopyranose ring are oxidized to introduce dicarboxy groups, and/or nanocellulose which is a defibrated product of the oxidized cellulose. Manufacturing method.
- a method for adjusting the viscosity of an aqueous composition containing cellulose comprising the steps of: mixing the aqueous composition with a thickener;
- the cellulose contains oxidized cellulose, which is an oxide of a cellulose-based raw material with hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and is substantially free of N-oxyl compounds; method.
- a method for adjusting the viscosity of an aqueous composition containing cellulose comprising the steps of: mixing the aqueous composition with a thickener;
- the cellulose includes oxidized cellulose having a structure in which the second and third hydroxyl groups of the glucopyranose ring are oxidized to introduce dicarboxy groups, and/or nanocellulose which is a defibrated product of the oxidized cellulose.
- the present invention can provide a composition that contains oxidized cellulose, which is an oxidation product of a cellulose-based raw material using hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and that has a suitably adjustable (or adjusted) viscosity.
- the viscosities of various CNFs and mixtures of the CNFs with methylcellulose (10% by mass relative to the mass of CNF) are shown.
- the viscosities of various CNFs and mixtures of the CNFs with methylcellulose (2% by weight relative to the weight of CNF) are shown.
- the viscosities of various CNFs and mixtures of the CNFs with methylcellulose (10% by mass relative to the mass of CNF) are shown.
- the viscosities of various CNFs and mixtures of the CNFs with methylcellulose (2% by weight relative to the weight of CNF) are shown.
- the viscosity of an emulsion containing an acrylic resin and a mixture of said emulsion with CNF and/or methylcellulose are shown.
- the viscosity of CNF, the viscosity of mixtures of CNF and methylcellulose (1.4 mass%, 7.1 mass%, and 14 mass% relative to the mass of CNF), and the viscosity of mixtures of CNF and guar gum (1.4 mass%, 7.1 mass%, and 14 mass% relative to the mass of CNF) are shown.
- 1 shows the viscosity of compositions with different salt concentrations (Example 5 and Comparative Example 4).
- 1 shows the viscosity of compositions with different salt concentrations (Example 5 and Comparative Example 5).
- 1 shows the viscosity of compositions with different salt concentrations (Example 5 and Comparative Example 6).
- 1 shows the viscosity of compositions with different salt concentrations (Example 5 and Comparative Example 7).
- 1 shows the relationship between pH and viscosity of each composition of Example 6 and Comparative Examples 8 and 9.
- composition comprising oxidized cellulose, which is an oxidation product of a cellulosic raw material with hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and a thickener.
- Dispersions containing oxidized cellulose and/or nanocellulose in this embodiment tend to have lower viscosity than dispersions containing oxidized cellulose and/or nanocellulose obtained by other methods (e.g., TEMPO oxidation or mechanical defibration) (hereinafter also referred to as "comparative cellulose").
- the viscosity of the dispersion containing the comparative cellulose is not easily increased when mixed with a thickener, whereas the viscosity of the dispersion containing the oxidized cellulose and/or nanocellulose in this embodiment is significantly increased when mixed with a thickener. Therefore, the viscosity can be increased with a small amount of thickener, making it easy to adjust the viscosity.
- the dispersion containing oxidized cellulose and/or nanocellulose in this embodiment preferably exhibits thixotropy, and therefore the viscosity can be temporarily reduced by applying force.
- the viscosity is reduced at the time of application, making it easier to use, while the viscosity increases after application and is easier to maintain.
- the pH of the composition of this embodiment is not particularly limited, but is preferably within the range of 0 to 14.0 in order to prevent a decrease in viscosity.
- the lower limit of the pH of the composition according to the present embodiment is preferably 2.0, more preferably 2.5, from the viewpoint of maintaining the viscosity.
- the upper limit of the pH of the composition according to the present embodiment is preferably 13.0, and more preferably 12.0, from the viewpoint of maintaining the viscosity.
- the pH of the composition according to the present embodiment is preferably 2.0 or more and 13.0 or less, and more preferably 2.5 or more and 12.0 or less.
- the pH of the composition of this embodiment may be in the range of 0 to less than 7.0, 0 to 6.9, 0 to 6.8, 0 to 6.7, 0 to 6.6, 0 to 6.5, over 7.0 and up to 14.0, 7.1 to 14.0, 7.2 to 14.0, 7.3 to 14.0, 7.4 to 14.0, or 7.5 to 14.0.
- the pH range of the composition of this embodiment may be a range that is a suitable combination of the above ranges.
- Specific examples of combined ranges include a range of 0 or more and less than 7.0, and more than 7.0 and 14.0 or less; or a range of 0 or more and less than 7.0, and 7.5 or more and 14.0 or less.
- the pH of the composition can be adjusted, for example, by adding a pH adjuster as described below.
- the pH of the composition of this embodiment can be measured using a pH meter.
- the amount of oxidized cellulose and/or nanocellulose in this embodiment is not particularly limited, but is preferably 0.01 to 50% by mass, more preferably 0.1 to 30% by mass, even more preferably 0.1 to 20% by mass, and particularly preferably 0.1 to 15% by mass, relative to the mass of the composition.
- the above amount refers to the total amount of oxidized cellulose and nanocellulose.
- the composition according to this embodiment may not contain a dispersant.
- the composition according to this embodiment may be in a dry state.
- the composition in a dry state can be mixed with a dispersant, if necessary, to adjust the viscosity to an appropriate level.
- the composition according to this embodiment preferably contains a dispersion medium.
- the dispersion medium preferably contains water, and from the viewpoint of safety, more preferably contains only water.
- a composition containing water as a dispersion medium is referred to as an "aqueous composition.”
- the viscosity of the aqueous composition according to this embodiment may be adjusted as appropriate depending on the intended use.
- the viscosity of the aqueous composition may be, for example, 0.01 to 1000 Pa ⁇ s, 0.1 to 100 Pa ⁇ s, or 0.1 to 10 Pa ⁇ s.
- viscosity refers to the viscosity at a shear rate of 0.1 s -1 when measured at 25°C and a shear rate of 0.01 to 100 s -1 using a shear type rheometer. A specific method for measuring the viscosity is as described in the examples below.
- the viscosity of the aqueous composition according to this embodiment when measured at a shear rate of 10 s -1 , is preferably 10 to 1 x 10 6 % higher, more preferably 100 to 1 x 10 5 %, and even more preferably 1 x 10 3 to 1 x 10 5 % higher than the viscosity of a control composition obtained by removing the thickener from the aqueous composition.
- oxidized cellulose refers to an oxide of a cellulose-based raw material with hypochlorous acid or a salt thereof before defibration.
- hypochlorous acid or its salts examples include hypochlorous acid water, sodium hypochlorite, potassium hypochlorite, calcium hypochlorite, and ammonium hypochlorite.
- the amount of hypochlorous acid or its salt used is not particularly limited, but it is preferable to use it so that the effective chlorine concentration in the reaction system is 6 to 43 mass%.
- the effective chlorine concentration may be a low concentration of 6 to 14 mass%, or a high concentration of 14 to 43 mass%.
- hypochlorous acid or its salt The definition of the effective chlorine concentration of hypochlorous acid or its salt is as described in WO 2022/009979.
- the cellulosic raw material is not particularly limited as long as it is a material mainly composed of cellulose, and examples thereof include pulp, natural cellulose, and fine cellulose obtained by depolymerizing cellulose by mechanical treatment.
- the cellulosic raw material preferably has an I-type crystal structure.
- commercially available products such as crystalline cellulose made from pulp can be used as they are.
- unused biomass containing a large amount of cellulose components, such as soybean pulp or soybean hulls may be used as the raw material.
- the cellulosic raw material may be treated in advance with an appropriate concentration of alkali in order to facilitate the penetration of the oxidizing agent used into the raw pulp.
- the main component of plants is cellulose, and bundles of cellulose molecules are called cellulose microfibrils.
- the cellulose in cellulosic raw materials is also contained in the form of cellulose microfibrils.
- N-oxyl compounds The oxidized cellulose in this embodiment is substantially free of N-oxyl compounds. By being substantially free of N-oxyl compounds, the impact on the environment and human body is sufficiently reduced, making it highly safe.
- An example of an N-oxyl compound is 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO).
- substantially free of N-oxyl compounds means that no N-oxyl compounds are used in the production of oxidized cellulose, that no N-oxyl compounds are contained in the oxidized cellulose at all, or that the content of N-oxyl compounds is 2.0 ppm by mass or less, and preferably 1.0 ppm by mass or less, relative to the total amount of oxidized cellulose.
- the content of N-oxyl compounds as an increase from the cellulosic raw material, is preferably 2.0 ppm by mass or less, more preferably 1.0 ppm by mass or less, it is also considered to be “substantially free of N-oxyl compounds.”
- the content of N-oxyl compounds can be measured by known means.
- known means include a method using a total nitrogen trace analyzer (e.g., TN-2100H manufactured by Nitto Seiko Analytech Co., Ltd.).
- the carboxy group amount of the oxidized cellulose in this embodiment is preferably 0.1 to 3.0 mmol/g, more preferably 0.2 to 2.0 mmol/g, even more preferably 0.3 to 1.5 mmol/g, particularly preferably 0.4 to 1.2 mmol/g, and most preferably 0.5 to 0.9 mmol/g.
- the amount of carboxy groups in oxidized cellulose can be measured by the method described in WO 2022/009979.
- the oxidized cellulose in this embodiment preferably has a structure in which at least two of the hydroxyl groups on the glucopyranose ring constituting the cellulose are oxidized, and more specifically, preferably has a structure in which the second and third hydroxyl groups on the glucopyranose ring are oxidized to introduce a dicarboxy group. It is also preferable that the hydroxyl group on the sixth position of the glucopyranose ring is not oxidized and remains as a hydroxyl group.
- the position of the carboxy group on the glucopyranose ring can be analyzed by solid-state 13C -NMR spectroscopy.
- Rayon has the same chemical structure as cellulose, and its oxide (oxidized rayon) is water-soluble.
- oxidized rayon is dissolved in heavy water and solution one-dimensional 13 C-NMR measurement is performed, a carbon peak attributable to a carboxy group is observed at 165 to 185 ppm.
- two signals appear in this chemical shift range.
- it can be determined by solution two-dimensional NMR measurement that the carboxy groups are introduced at the 2- and 3-positions.
- a baseline is drawn around a peak in the range of 165 ppm to 185 ppm in a solid-state 13C -NMR spectrum to determine the total area, and then the area is vertically divided at the peak top to determine the ratio of the two peak area values (larger area value/smaller area value). If the ratio of the peak area values is 1.2 or more, the peak can be said to be broad.
- the presence or absence of the broad peak can be determined by the ratio of the length L of the baseline in the range of 165 ppm to 185 ppm to the length L' of the perpendicular line from the peak top to the baseline. That is, if the ratio L'/L is 0.1 or more, it can be determined that a broad peak is present.
- the ratio L'/L may be 0.2 or more, 0.3 or more, 0.4 or more, or 0.5 or more. There is no particular upper limit to the ratio L'/L, but it is usually sufficient that it is 3.0 or less, 2.0 or less, or 1.0 or less.
- the structure of the glucopyranose ring can also be determined by analysis according to the method described in Sustainable Chem. Eng. 2020, 8, 48, 17800-17806.
- the viscosity average degree of polymerization of the oxidized cellulose in this embodiment is preferably 30-500, more preferably 60-300, even more preferably 70-150, and particularly preferably 80-130.
- the viscosity average degree of polymerization is the average degree of polymerization measured by a viscosity method.
- the viscosity average degree of polymerization can be measured by the method described in WO 2022/009979.
- the oxidized cellulose in this embodiment can be produced by oxidizing a cellulose-based raw material with hypochlorous acid or a salt thereof. Specific production methods include, for example, those described in WO 2022/009979 and WO 2022/009980. Oxidized cellulose can also be obtained as a commercially available product, such as ARONFIBRO (registered trademark) manufactured by Toagosei Co., Ltd.
- Nanocellulose in this embodiment refers to an oxide of a cellulose-based raw material with hypochlorous acid or a salt thereof, after defibration.
- Nanocellulose is a general term for cellulose that has been made finer, and includes fine cellulose fibers and cellulose nanocrystals (CNC). Fine cellulose fibers are also called cellulose nanofibers (CNF). From the perspective of increasing viscosity, nanocellulose is preferably CNF. Nanocellulose preferably has an amorphous portion. CNF has an amorphous portion, whereas CNC does not.
- the nanocellulose in this embodiment contains a carboxy group.
- the carboxy group may be in the H type (-COOH) or in the salt type.
- the type of salt is not particularly limited, but examples include alkali metal salts such as lithium salts, sodium salts, and potassium salts; alkaline earth metal salts such as calcium salts and barium salts; other metal salts such as magnesium salts and aluminum salts; ammonium salts, organic amine salts, etc.
- Nanocellulose is an aggregate of individual fibers.
- carboxylated nanocellulose it is sufficient that it contains at least one carboxylated nanocellulose strand, and it is preferable that the carboxylated nanocellulose is the main component.
- carboxylated nanocellulose being the main component means that the proportion of carboxylated nanocellulose in the total amount of nanocellulose exceeds 50% by mass, preferably exceeds 70% by mass, and more preferably exceeds 80% by mass. The upper limit of the above proportion is 100% by mass, but it may be 98% by mass or 95% by mass.
- the nanocellulose in this embodiment is substantially free of N-oxyl compounds.
- the meaning of "substantially free of N-oxyl compounds" in nanocellulose and the method for measuring the content of N-oxyl compounds are as described in the (N-oxyl compounds) section of [Oxidized Cellulose] above.
- the average fiber length of the nanocellulose in this embodiment is preferably 50 to 700 nm, more preferably 50 to 500 nm, even more preferably 50 to 300 nm, still more preferably 60 to 300 nm, and particularly preferably 70 to 200 nm.
- the average fiber width of the nanocellulose in this embodiment is preferably 1 to 200 nm, more preferably 1 to 15 nm, even more preferably 1 to 10 nm, and particularly preferably 1 to 5 nm.
- the average fiber width and average fiber length of nanocellulose can be measured by the method described in WO 2022/009980.
- the aspect ratio (average fiber length/average fiber width) of the nanocellulose in this embodiment is preferably 20 to 200, more preferably 30 to 190, and even more preferably 40 to 180.
- the zeta potential of the nanocellulose in this embodiment is preferably -30 mV or less, more preferably -90 mV or more and -30 mV or less, even more preferably -80 mV or more and -30 mV or less, even more preferably -70 mV or more and -30 mV or less, and particularly preferably -65 mV or more and -35 mV or less.
- the zeta potential can be measured by the method described in WO 2022/009980.
- the nanocellulose dispersion in this embodiment in which the nanocellulose is dispersed in a dispersion medium has little light scattering by cellulose fibers and can exhibit high light transmittance.
- the light transmittance of a mixed liquid in which nanocellulose is mixed with water to a solid concentration of 0.1% by mass is preferably 95% or more, more preferably 96% or more, even more preferably 97% or more, and particularly preferably 99% or more.
- the light transmittance is a value at a wavelength of 660 nm measured by a spectrophotometer.
- Light transmittance can be measured by the method described in WO 2022/009979.
- the nanocellulose in this embodiment can be produced by defibrating the above-mentioned oxidized cellulose.
- Specific production methods include, for example, those described in International Publication No. 2022/009979 and International Publication No. 2022/009980.
- Nanocellulose can also be obtained by defibrating a commercially available oxidized cellulose product (for example, Aronfibro (registered trademark) manufactured by Toagosei Co., Ltd.).
- the composition according to this embodiment includes a thickener.
- a thickener By combining the oxidized cellulose and/or nanocellulose according to this embodiment with a thickener, the viscosity can be significantly increased.
- the thickener may be used alone or in combination of two or more.
- the thickening agent is preferably a thickening polysaccharide.
- the thickening polysaccharide is preferably water-soluble.
- water-soluble means that the amount that dissolves in 100 g of water at 20°C is 1 g or more.
- the amount that dissolves is preferably 3 g or more, more preferably 10 g or more, and even more preferably 20 g or more.
- Thickening polysaccharides include, for example, methylcellulose, carboxymethylcellulose, guar gum, xanthan gum, locust bean gum, cassia gum, gellan gum, psyllium seed gum, tragacanth gum, karaya gum, gum arabic, ghatti gum, tara gum, tamarind seed gum, carrageenan, pectin, pullulan, curdlan, starch, gelatin, agar, alginic acid, and soybean polysaccharides.
- the thickener may be a thickener having a hydrophobic region capable of hydrophobic interaction with the oxidized cellulose and/or nanocellulose in this embodiment (hereinafter referred to as a "hydrophobic thickener").
- hydrophobic region of the hydrophobic thickener examples include a continuous ring structure and a linear or branched hydrocarbon chain structure.
- Hydrophobic thickeners having a continuous cyclic structure can be obtained, for example, by polymerizing a monomer having a cyclic structure.
- the cyclic structure include an aromatic hydrocarbon structure and an alicyclic hydrocarbon structure.
- the cyclic structure is preferably a cycloalkane structure, and more preferably a cyclohexane structure.
- the thickening polysaccharides generally have a continuous cyclohexane structure, and are therefore included in the hydrophobic thickeners.
- the amount of thickener may be adjusted appropriately depending on the desired viscosity, but is preferably 0.1 to 40% by mass, more preferably 0.3 to 35% by mass, even more preferably 0.5 to 30% by mass, and particularly preferably 0.5 to 20% by mass, relative to the mass (solid content) of oxidized cellulose and/or nanocellulose in this embodiment.
- mass (solid content) of oxidized cellulose and/or nanocellulose means the “total mass (solid content) of oxidized cellulose and nanocellulose.”
- a small amount of thickener can significantly increase the viscosity of the dispersion containing oxidized cellulose and nanocellulose in this embodiment.
- composition according to the present embodiment may further contain a salt.
- a salt is a compound consisting of a positive ion (hereinafter also referred to as "cation") and a negative ion (hereinafter also referred to as "anion").
- cation positive ion
- anion negative ion
- the mechanism of the increase in viscosity is presumed to be due to an interaction (preferably hydrophobic interaction) between the oxidized cellulose and/or nanocellulose and the thickener, as described above, and since this interaction is not easily affected by salt, it is presumed that the decrease in viscosity is suppressed even in the presence of salt.
- Salts may be used alone or in combination of two or more types.
- the salt may be an inorganic salt, an organic salt, or a mixture thereof.
- Examples of cations constituting inorganic salts or organic salts include ions of alkali metals such as lithium ion (Li + ), sodium ion (Na + ), potassium ion (K + ), etc., ions of alkaline earth metals such as magnesium ion (Mg 2+ ), calcium ion (Ca 2+ ), etc., ions of transition metals such as iron ion (Fe 3+ , Fe 2+ ), copper ion (Cu 2+ , Cu + ), etc., and ions of metals of Group 12 or Group 13 such as zinc ion (Zn 2+ ), aluminum ion (Al 3+ ), etc.
- alkali metals such as lithium ion (Li + ), sodium ion (Na + ), potassium ion (K + ), etc.
- alkaline earth metals such as magnesium ion (Mg 2+ ), calcium ion (Ca 2+ ), etc.
- transition metals such
- anions constituting inorganic salts or organic salts include halogen ions such as chloride ion (Cl - ), bromide ion (Br - ), and iodide ion (I - ); sulfate ion (SO 4 2- ); nitrate ion (NO 3 - ); carbonate ion (CO 3 2- ); hydrogen carbonate ion (HCO 3 - ); hydrogen sulfate ion (HSO 4 - ); phosphate ion (PO 4 3- ); hydrogen phosphate ion (HPO 4 2- ); dihydrogen phosphate ion (H 2 PO 4 - ); sulfite ion (SO 3 2- ); thiosulfate ion (S 2 O 3 2- ); chlorate ion (ClO 3 - ); perchlorate ion (ClO 4 - ); and hydrogen ions (H + ) formed from acid groups such as
- inorganic salts include chlorides of alkali metals such as sodium chloride (NaCl) and potassium chloride (KCl); hydrochlorides such as ammonium chloride (NH 4 Cl); sulfates such as sodium sulfate (Na 2 SO 4 ), potassium sulfate (K 2 SO 4 ), ammonium sulfate ((NH 4 ) 2 SO 4 ), magnesium sulfate (MgSO 4 ), aluminum sulfate (Al 2 (SO 4 ) 3 ), nickel sulfate (NiSO 4 ), alum (AlK(SO 4 ) 2 ), and ammonium alum (Al(NH 4 )(SO 4 ) 2 ); nitrates such as sodium nitrate (NaNO 3 ), potassium nitrate (KNO 3 ), ammonium nitrate (NH 4 NO 3 ), calcium nitrate tetrahydrate (Ca(NO 3 ) 2.4H 2 O), and
- organic salts include acetates, lactates, maleates, fumarates, tartrates, methanesulfonates, p-toluenesulfonates, triethanolamine salts, and amino acid salts.
- the amount of salt is preferably 0.01 to 10% by mass, more preferably 0.01 to 5% by mass, and even more preferably 0.05 to 5% by mass, based on the mass of the composition.
- the amount of salt is preferably 1 to 1000% by mass, more preferably 1 to 500% by mass, and even more preferably 5 to 500% by mass, relative to the mass (solid content) of the oxidized cellulose and/or nanocellulose in this embodiment.
- the "mass (solid content) of oxidized cellulose and/or nanocellulose” means the “total mass (solid content) of oxidized cellulose and nanocellulose.”
- the composition according to this embodiment may further contain a pH adjuster.
- a pH adjuster is an agent that has the effect of adjusting the pH to a predetermined range.
- the viscosity increased by the combination of the oxidized cellulose and/or nanocellulose and the thickener in this embodiment can be maintained without decreasing even if the pH adjuster is contained.
- the mechanism of the increase in viscosity is presumed to be due to an interaction (preferably hydrophobic interaction) between the oxidized cellulose and/or nanocellulose and the thickener, as described above, and since this interaction is not easily affected by pH, it is presumed that the decrease in viscosity is suppressed even if the pH changes.
- the pH adjusters may be used alone or in combination of two or more.
- the pH adjuster may be an acid, a base, or a neutralizing agent, but preferably contains an acid or a base.
- the pH adjuster may be a combination of an acid and a neutralizing agent, or a combination of a base and a neutralizing agent.
- the acid may be an organic acid, an inorganic acid, or a mixture thereof.
- organic acids examples include citric acid, tartaric acid, fumaric acid, malic acid, maleic acid, gluconic acid, succinic acid, ascorbic acid, glycolic acid, and salicylic acid.
- inorganic acids examples include hydrochloric acid, sulfuric acid, phosphoric acid, and sulfamic acid.
- the base may be an organic base, an inorganic base, or a mixture thereof.
- Organic bases include, for example, triethanolamine, carbamide peroxide, and cement phosphate.
- Inorganic bases include, for example, ammonia, ammonium hydroxide, and alkali metal salts such as lithium, sodium, and potassium.
- neutralizing agent there are no particular limitations on the neutralizing agent, so long as it has the effect of adjusting the pH to the desired level.
- Neutralizing agents can be used to adjust or maintain the level of acidity or basicity.
- Neutralizing agents can also be described as buffering agents. Examples of neutralizing agents include citric acid, sodium carbonate, phosphoric acid, ammonium hydroxide, and glycolic acid.
- the amount of pH adjuster may be changed as appropriate depending on the desired pH.
- the pH of the composition according to this embodiment is as described above.
- composition according to the present embodiment may contain further components (optional components). Even if the composition contains the optional components, it can still exhibit a thickening effect.
- Optional components may be selected appropriately depending on the intended use, but examples include resins, pigments, surfactants, defoamers, preservatives, plasticizers, stabilizers, and antioxidants.
- composition of the present embodiment may be, for example, a paint or a cosmetic product, and is preferably a cosmetic product.
- cosmetics examples include makeup cosmetics, hair cosmetics, skin cosmetics, perfumes, colognes, bath cosmetics, nail cosmetics, lip care cosmetics, and body powders.
- makeup cosmetics examples include lip cosmetics such as lipstick and lip gloss; point makeup cosmetics such as eye shadow, eye liner, blush, and mascara; and base makeup cosmetics such as foundation, concealer, and powder.
- Hair cosmetics include, for example, hair styling products, hair coloring products (hair dyes), hair washes, and rinses.
- Examples of skin cosmetics include lotions, lotions, creams, milky lotions, suntan cosmetics, sunscreen cosmetics, aftercare lotions, cleansers, and packs.
- nail cosmetics examples include manicures, pedicures, and nail polish removers.
- cosmetics also include quasi-drugs.
- cosmetics in this specification also include those that contain active ingredients for preventive or hygienic purposes.
- hair colorants fall under both cosmetics and quasi-drugs.
- hair colorants include permanent hair dyes such as hair color and gray hair dye; bleaching agents such as hair bleach; semi-permanent hair dyes such as hair manicure, color treatment, and color rinse; and temporary hair dyes such as hair mascara, hair color spray, hair marker, and hair foundation.
- hair colorants include these embodiments.
- Another embodiment of the present invention relates to a composition
- a composition comprising cellulose and a thickener, wherein the cellulose comprises oxidized cellulose having a structure in which the second and third hydroxyl groups of the glucopyranose ring are oxidized to introduce dicarboxyl groups, and/or nanocellulose, which is a defibrated product of the oxidized cellulose.
- the description of the composition according to this embodiment is cited as appropriate.
- One embodiment of the present invention relates to a method for producing a composition, the method comprising the step of mixing cellulose, a thickener, and, optionally, a salt and/or a pH adjuster, the cellulose comprising oxidized cellulose, which is an oxidation product of a cellulose-based raw material with hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and the method is substantially free of N-oxyl compounds.
- Oxidized cellulose obtained by oxidation reaction with hypochlorous acid or its salts is easily defibrated, so even when mixed gently with a thickener, at least a portion of the oxidized cellulose is defibrated into nanocellulose.
- Another embodiment of the present invention relates to a method for producing a composition, the method comprising a step of mixing cellulose with a thickener, the cellulose comprising oxidized cellulose having a structure in which the second and third hydroxyl groups of the glucopyranose ring are oxidized to introduce dicarboxyl groups, and/or nanocellulose, which is a defibrated product of the oxidized cellulose.
- the description of the production method according to the above embodiment is cited as appropriate.
- One embodiment of the present invention relates to a method for adjusting the viscosity of an aqueous composition containing cellulose, the method comprising a step of mixing the aqueous composition with a thickener, and, optionally, a salt and/or a pH adjuster, wherein the cellulose comprises oxidized cellulose, which is an oxidation product of a cellulose-based raw material with hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and is substantially free of N-oxyl compounds.
- the viscosity of the aqueous composition is increased by preferably 10 to 1 ⁇ 10 6 %, more preferably 100 to 1 ⁇ 10 5 %, and even more preferably 1 ⁇ 10 3 to 1 ⁇ 10 5 %, when measured at a shear rate of 10 s -1.
- Another embodiment of the present invention relates to a method for adjusting the viscosity of an aqueous composition containing cellulose, the method comprising a step of mixing the aqueous composition with a thickener, the cellulose comprising oxidized cellulose having a structure in which the second and third hydroxyl groups of the glucopyranose ring are oxidized to introduce dicarboxy groups, and/or nanocellulose, which is a defibrated product of the oxidized cellulose.
- the description of the adjustment method according to the above embodiment is cited as appropriate.
- the mixture was kept at 30°C in the same thermostatic water bath, and the pH during the reaction was adjusted to 11.0 while adding 48% by mass sodium hydroxide.
- the mixture was stirred at 200 rpm for 30 minutes using a propeller-type stirring blade in the stirrer, and an oxidation reaction was carried out.
- the product was subjected to solid-liquid separation by suction filtration using a PTFE membrane filter with an opening of 0.1 ⁇ m, and oxidized cellulose was obtained.
- the obtained oxidized cellulose was washed with pure water, and the amount of carboxy groups in the filtered product after washing (oxidized cellulose) was measured, which was 0.70 mmol/g.
- the available chlorine concentration in the aqueous sodium hypochlorite solution was measured by the following method. (Measurement of available chlorine concentration in sodium hypochlorite aqueous solution) 0.582g of an aqueous solution of sodium hypochlorite pentahydrate crystals added to pure water was precisely measured, 50ml of pure water was added, 2g of potassium iodide and 10ml of acetic acid were added, and the solution was immediately sealed and left in the dark for 15 minutes. After leaving the solution for 15 minutes, the liberated iodine was titrated with 0.1mol/L sodium thiosulfate solution (indicator: starch test solution), and the titration amount was 34.55ml.
- a blank test was separately performed to correct the amount, and 1ml of 0.1mol/L sodium thiosulfate solution was equivalent to 3.545mgCl, so the effective chlorine concentration in the aqueous sodium hypochlorite solution was 21% by mass.
- the oxidized cellulose obtained in Production Example 1 was freeze-dried, and then samples were left to stand at 23°C and 50% RH for 24 hours or more.
- Solid-state 13C -NMR measurements confirmed that all samples had a structure in which the 2nd and 3rd hydroxyl groups on the glucopyranose ring had been oxidized and carboxy groups had been introduced.
- the measurement conditions for solid-state 13C -NMR are shown below.
- the obtained filtrate was washed with pure water, and then the amount of carboxyl groups was measured.
- the amount of carboxyl groups was 1.55 mmol/g, and the amount of filtrate was about 1.0 g.
- the nitrogen component derived from N-oxyl compounds in the oxidized cellulose was measured as the amount of nitrogen using a total nitrogen trace analyzer (manufactured by Nitto Seiko Analytech Co., Ltd., device name: TN-2100H), and the increase from the raw pulp was calculated to be 5 ppm.
- This oxidized cellulose was mechanically defibrated to obtain a nanocellulose aqueous dispersion (solid content 2.0% by mass) obtained by TEMPO oxidation.
- Example 1 The oxidized cellulose obtained in Production Example 1 was made into an aqueous dispersion (solid content approximately 10% by mass), and distilled water was added to this to dilute the solid content to 5% by mass. In this state, the mixture was stirred at 10,000 rpm for 60 minutes using a homomixer (TOKUSHU KIKA ROBO MICS) to defibrate the oxidized cellulose into CNF. Separately, an aqueous solution of methylcellulose (MC) with a concentration of 1% by mass and distilled water were prepared.
- MC methylcellulose
- the viscosity of each sample was measured as follows. Viscosity measurements were performed using a shear rheometer (Anton Paar, Physica MCR301) with a parallel disk jig with a diameter of 50 mm. The shear rate was set at 0.01 to 100 s -1 , and the temperature at 25°C. Measurements were performed twice for each sample (one measurement was performed from 0.01 to 100 s -1 , and the sample was left to stand for 20 seconds after the measurement. Then, a second measurement was performed in the same shear rate range), and the data from the second measurement was used.
- Comparative Example 1 A sample having a predetermined CNF/methylcellulose/water ratio was prepared by mixing the nanocellulose aqueous dispersion (solid content 2.0% by mass) obtained by TEMPO oxidation produced in Comparative Production Example 1, a 1% by mass aqueous methylcellulose solution, and distilled water.
- Comparative Example 2 A sample having a predetermined CNF/methylcellulose/water ratio was prepared by mixing the nanocellulose aqueous dispersion (solid content 2.0% by mass) obtained by mechanical fiberization produced in Comparative Production Example 2, a 1% by mass aqueous methylcellulose solution, and distilled water.
- Example 1 The measurement results of various samples in Example 1, Comparative Example 1, and Comparative Example 2 are shown in Figures 1 to 4. Note that the percentage of each component in the figures indicates the mass percentage of each component relative to the total amount of each sample.
- Example 2 The oxidized cellulose obtained in Production Example 1 was made into an aqueous dispersion (solid content approximately 10% by mass), and distilled water was added to this to dilute it to a solid content of 5% by mass. In this state, the mixture was stirred at 10,000 rpm for 60 minutes using a homomixer (TOKUSHU KIKA ROBO MICS) to defibrate the oxidized cellulose into CNF (pre-defibration). Separately, an acrylic emulsion with a solid content of 18% by mass and an aqueous solution of 1% by mass of methylcellulose were prepared.
- a homomixer TOKUSHU KIKA ROBO MICS
- Example 3 From the sample of Example 2, Sample 2 was prepared by omitting CNF, Sample 3 was prepared by omitting methylcellulose, and Sample 4 was prepared by omitting CNF and methylcellulose. The viscosity was measured by the same method as in Example 1.
- Example 2 The compositions of the various samples in Example 2 and Comparative Example 3 are shown in Table 1, and the measurement results are shown in FIG.
- Example 3 The oxidized cellulose obtained in Production Example 1 was made into an aqueous dispersion (solid content approximately 10% by mass), and distilled water was added to this to dilute the solid content to 5% by mass. In this state, the mixture was stirred at 10,000 rpm for 60 minutes using a homomixer (TOKUSHU KIKA ROBO MICS) to defibrate the oxidized cellulose into CNF. Samples were prepared by mixing CNF, methylcellulose, and water in a specified ratio. The viscosity was measured by the same method as in Example 1.
- Example 4 A sample was prepared in which guar gum (GG) was used in place of the methylcellulose in Example 3. The viscosity was measured by the same method as in Example 1.
- Example 5 The oxidized cellulose obtained in Production Example 1 was made into an aqueous dispersion (solid content approximately 10% by mass), and distilled water was added to this to dilute it to a solid content of 7.5% by mass. In this state, the mixture was stirred at 10,000 rpm for 60 minutes using a homomixer (TOKUSHU KIKA ROBO MICS) to defibrate the oxidized cellulose into CNF. Separately, an aqueous solution of methylcellulose (MC) with a concentration of 1% by mass was prepared. In addition, an aqueous solution of sodium chloride (NaCl) with a concentration of 12.5% by mass and distilled water were prepared.
- MC methylcellulose
- NaCl sodium chloride
- a CNF aqueous dispersion with a solid content of 7.5% by mass, an aqueous solution of methylcellulose with a concentration of 1% by mass, an aqueous solution of sodium chloride with a concentration of 12.5% by mass, and distilled water were mixed to prepare a sample in which the ratio of CNF/methylcellulose/sodium chloride to the total composition amount was 1.0% by mass/0.1% by mass/0 to 1.0% by mass.
- the viscosity of each sample was measured using the same viscosity measurement method as in Example 1.
- Carbopol (registered trademark) 980 was used, and a 12.5% by mass aqueous solution of sodium chloride and distilled water were mixed to prepare a sample in which the ratio of Carbopol (registered trademark)/sodium chloride to the total composition amount was 0.075% by mass/0 to 1.0% by mass.
- the viscosity of each sample was measured using the same viscosity measurement method as in Example 1.
- Example 5 A sample was prepared by mixing Carbopol (registered trademark) 980 with a 12.5% by mass aqueous sodium chloride solution and distilled water, in which the ratio of Carbopol (registered trademark)/sodium chloride to the total composition amount was 1.0% by mass/0 to 1.0% by mass. The viscosity of each sample was measured using the same viscosity measurement method as in Example 1.
- Example 5 CNF and MC
- Comparative Example 4 Carbopol (registered trademark) 980
- Figure 7 The results of viscosity measurements for Example 5 (CNF and MC) and Comparative Example 4 had similar viscosities.
- Comparative Example 4 the viscosity decreased significantly when salt was added, but in Example 5, the decrease in viscosity was suppressed even when salt was added.
- Example 5 CNF and MC
- Comparative Example 5 Carbopol (registered trademark) 980
- the amount of CNF in Example 5 and the amount of Carbopol (registered trademark) in Comparative Example 5 were the same.
- Comparative Example 5 the viscosity decreased when salt was added, but in Example 5, the decrease in viscosity was suppressed even when salt was added.
- Example 5 CNF and MC
- Comparative Example 6 Ultrez 30
- the sample without salt in Example 5 and the sample without salt in Comparative Example 6 had similar viscosities.
- Comparative Example 6 the viscosity decreased significantly when salt was added, but in Example 5, the decrease in viscosity was suppressed even when salt was added.
- Example 5 CNF and MC
- Comparative Example 7 Ultrez 30
- the amount of CNF in Example 5 and the amount of Ultrez 30 in Comparative Example 7 were the same.
- Comparative Example 7 the viscosity decreased when salt was added, but in Example 5, the decrease in viscosity was suppressed even when salt was added.
- Example 6 The oxidized cellulose obtained in Production Example 1 was made into an aqueous dispersion (solid content approximately 10% by mass), and distilled water was added to this to dilute it to a solid content of 7.5% by mass. In this state, the mixture was stirred at 10,000 rpm for 60 minutes using a homomixer (TOKUSHU KIKA ROBO MICS) to defibrate the oxidized cellulose into CNF. Separately, an aqueous solution of methylcellulose (MC) with a concentration of 1% by mass and distilled water were prepared.
- MC methylcellulose
- a CNF aqueous dispersion with a solid content of 7.5% by mass, a 1% by mass aqueous solution of methylcellulose, and distilled water were mixed to prepare a sample with a ratio of CNF 1% by mass/methylcellulose 0.1% by mass relative to the total composition amount.
- the pH of the above sample was adjusted using 0.5 M hydrochloric acid or 0.5 M aqueous sodium hydroxide solution.
- 0.5 M hydrochloric acid was used to adjust to the acidic side
- 0.5 M aqueous sodium hydroxide was used to adjust to the alkaline side.
- the above reagent was added dropwise while checking the value by immersing the electrode of a pH meter (HORIBA D-51 pH METER) in the screw tube containing the above sample.
- the viscosity was measured at shear rates of 1 [1/s] and 10 [1/s] using the same viscosity measurement method as in Example 1. The results are shown in FIG.
- the compositions of Example 6 tend to suppress a decrease in viscosity even when the pH is changed from 7.
- the compositions of Comparative Example 8 (Carbopol (registered trademark) 980) and Comparative Example 9 (Ultrez 30) tend to decrease in viscosity when the pH is changed from 7. Therefore, a dispersion containing oxidized cellulose, which is an oxide of a cellulose-based raw material using hypochlorous acid or a salt thereof, and/or nanocellulose, which is a defibrated product of the oxidized cellulose, and a thickener can increase the viscosity and suppress a decrease in viscosity due to a change in pH.
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Abstract
Description
特許文献4は、次亜塩素酸又はその塩によるセルロース系原料の酸化物であり、平均繊維幅が1nm以上200nm以下であるナノセルロースであって、N-オキシル化合物を実質的に含まず、ゼータ電位が-30mV以下である、ナノセルロースを開示している。
[1]
セルロースと増粘剤とを含む、組成物であって、
前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まない、
組成物。
[2]
セルロースと増粘剤とを含む、組成物であって、
前記セルロースが、グルコピラノース環の第2位及び第3位の水酸基が酸化されてジカルボキシ基が導入された構造を有する酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含む、
組成物。
[3]
前記増粘剤が、増粘多糖類である、請求項[1]又は[2]に記載の組成物。
[4]
前記増粘剤が、前記酸化セルロースと疎水性相互作用することができる疎水性領域を有する、請求項[1]~[3]のいずれかに記載の組成物。
[5]
前記増粘剤の量が、前記酸化セルロースの質量(固形分)に対して、0.1~40質量%である、請求項[1]~[4]のいずれかに記載の組成物。
[6]
塩を更に含む、請求項[1]~[5]のいずれかに記載の組成物。
[7]
前記塩の量が、前記組成物に対して、0.01~10質量%である、[6]に記載の組成物。
[8]
pH調整剤を更に含む、請求項[1]~[7]のいずれかに記載の組成物。
[9]
前記組成物のpHが、0以上14.0以下の範囲内である、[8]に記載の組成物。
[10]
前記pH調整剤が、酸又は塩基を含む、[8]又は[9]に記載の組成物。
[11]
前記セルロースが、前記ナノセルロースを含む、請求項[1]~[10]のいずれかに記載の組成物。
[12]
前記組成物が、水系組成物である、請求項[1]~[11]のいずれかに記載の組成物。
[13]
前記水系組成物の粘度が、0.01~1000Pa・sである、[12]に記載の組成物。
[14]
前記水系組成物の粘度が、前記水系組成物から前記増粘剤を除いた対照組成物の粘度よりも、10~1×106%高い、[12]又は[14]に記載の組成物。
[15]
セルロースと増粘剤とを含む、組成物であって、
前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まず、
前記組成物のpHが、0以上14.0以下の範囲内である、
組成物。
[16]
セルロースと増粘剤とを含む、組成物であって、
前記セルロースが、グルコピラノース環の第2位及び第3位の水酸基が酸化されてジカルボキシ基が導入された構造を有する酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、
前記組成物のpHが、0以上14.0以下の範囲内である、
組成物。
[17]
前記組成物が、化粧品である、請求項[1]~[16]のいずれかに記載の組成物。
[18]
組成物の製造方法であって、
セルロースと増粘剤とを混合する工程を含み、
前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まない、
製造方法。
[19]
組成物の製造方法であって、
セルロースと増粘剤とを混合する工程を含み、
前記セルロースが、グルコピラノース環の第2位及び第3位の水酸基が酸化されてジカルボキシ基が導入された構造を有する酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含む、
製造方法。
[20]
セルロースを含む水系組成物の粘度を調節する方法であって、
前記水系組成物と増粘剤とを混合する工程を含み、
前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まない、
方法。
[21]
セルロースを含む水系組成物の粘度を調節する方法であって、
前記水系組成物と増粘剤とを混合する工程を含み、
前記セルロースが、グルコピラノース環の第2位及び第3位の水酸基が酸化されてジカルボキシ基が導入された構造を有する酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含む、
方法。
[22]
前記水系組成物と前記増粘剤とを混合することにより、前記水系組成物の粘度を10~1×106%上昇させる、[20]又は[21]に記載の方法。
本発明の一実施形態は、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースと、増粘剤と、を含む、組成物に関する。
驚くべきことに、比較セルロースを含む分散液は、増粘剤と混合しても、粘度が上昇しにくいのに対し、本実施形態における酸化セルロース及び/又はナノセルロースを含む分散液は、増粘剤と混合すると、粘度が顕著に上昇する。そのため、少量の増粘剤で粘度を上昇させることができるため、粘度の調節を容易に行うことができる。
本実施形態の係る組成物のpHの上限値は、粘度を維持する観点から、好ましくは13.0であり、より好ましくは12.0である。
本実施形態の係る組成物のpHは、好ましくは2.0以上13.0以下であり、より好ましくは2.5以上12.0以下である。
粘度上昇率(%)=
[(水系組成物の粘度-対照組成物の粘度)/(対照組成物の粘度)]×100
本実施形態における酸化セルロースは、次亜塩素酸又はその塩によるセルロース系原料の酸化物であって、解繊前のものを意味する。
なお、植物の主成分はセルロースであり、セルロース分子が束になったものがセルロースミクロフィブリルと称される。セルロース系原料中のセルロースもまた、セルロースミクロフィブリルの形態で含まれている。
本実施形態における酸化セルロースは、N-オキシル化合物を実質的に含まない。N-オキシル化合物を実質的に含まないことによって、環境や人体への影響が十分に低減されており安全性が高い。N-オキシル化合物としては、例えば、2,2,6,6-テトラメチルピペリジン-1-オキシル(TEMPO)が挙げられる。
また、N-オキシル化合物の含有量が、セルロース系原料からの増加分として、好ましくは2.0質量ppm以下、より好ましくは1.0質量ppm以下である場合も、「N-オキシル化合物を実質的に含まない」こととする。
本実施形態における酸化セルロースのカルボキシ基量は、好ましくは0.1~3.0mmol/gであり、より好ましくは0.2~2.0mmol/gであり、更に好ましくは0.3~1.5mmol/gであり、特に好ましくは0.4~1.2mmol/gであり、最も好ましくは0.5~0.9mmol/gである。
また、上記ブロードなピークの有無は、165ppm~185ppmの範囲のベースラインの長さLと、上記ピークトップからベースラインへの垂線の長さL’との比によって判断することができる。すなわち、比L’/Lが0.1以上であれば、ブロードなピークが存在すると判断できる。上記比L’/Lは、0.2以上であってもよく、0.3以上であってもよく、0.4以上であってもよく、0.5以上であってもよい。比L’/Lの上限値は特に制限されないが、通常3.0以下あればよく、2.0以下であってもよく、1.0以下であってもよい。
本実施形態における酸化セルロースの粘度平均重合度は、好ましくは30~500であり、より好ましくは60~300であり、更に好ましくは70~150であり、特に好ましくは80~130である。
本実施形態における酸化セルロースは、セルロース系原料を次亜塩素酸又はその塩で酸化することにより製造することができる。具体的な製造方法としては、例えば、国際公開第2022/009979号、国際公開第2022/009980号に記載の方法が挙げられる。酸化セルロースは、市販品として入手することもでき、例えば、東亞合成株式会社製アロンフィブロ(登録商標)等が挙げられる。
本実施形態におけるナノセルロースは、次亜塩素酸又はその塩によるセルロース系原料の酸化物であって、解繊後のものを意味する。
本実施形態におけるナノセルロースは、N-オキシル化合物を実質的に含まない。ナノセルロースが「N-オキシル化合物を実質的に含まない」ことの意味、及びN-オキシル化合物の含有量の測定方法は、上記[酸化セルロース]の(N-オキシル化合物)の欄の記載に従うものとする。
本実施形態におけるナノセルロースのカルボキシ基量及びその測定方法は、上記[酸化セルロース]の(カルボキシ基量)の欄の記載に従うものとする。
本実施形態におけるナノセルロースの平均繊維長は、好ましくは50~700nmであり、より好ましくは50~500nmであり、更に好ましくは50~300nmであり、より更に好ましくは60~300nmであり、特に好ましくは70~200nmである。
本実施形態におけるナノセルロースの平均繊維幅は、好ましくは1~200nmであり、より好ましくは1~15nmであり、更に好ましくは1~10nmであり、特に好ましくは1~5nmである。
本実施形態におけるナノセルロースのアスペクト比(平均繊維長/平均繊維幅)は、好ましくは20~200であり、より好ましくは30~190であり、更に好ましくは40~180である。
本実施形態におけるナノセルロースのゼータ電位は、好ましくは-30mV以下であり、より好ましくは-90mV以上-30mV以下であり、更に好ましくは-80mV以上-30mV以下であり、より更に好ましくは-70mV以上-30mV以下であり、特に好ましくは-65mV以上-35mV以下である。
本実施形態におけるナノセルロースを分散媒中に分散させたナノセルロース分散体は、セルロース繊維の光散乱等が少なく、高い光透過率を示すことができる。具体的には、ナノセルロースを水と混合して固形分濃度0.1質量%とした混合液における光透過率は、好ましくは95%以上であり、より好ましくは96%以上であり、更に好ましくは97%以上であり、特に好ましくは99%以上である。光透過率は、分光光度計により測定した波長660nmでの値である。
本実施形態におけるナノセルロースは、上述の酸化セルロースを解繊することにより製造することができる。具体的な製造方法としては、例えば、国際公開第2022/009979号、国際公開第2022/009980号に記載の方法が挙げられる。ナノセルロースは、酸化セルロースの市販品(例えば、東亞合成株式会社製アロンフィブロ(登録商標)等)を解繊することにより得ることもできる。
本実施形態に係る組成物は、増粘剤を含む。本実施形態における酸化セルロース及び/又はナノセルロースと、増粘剤とを組み合わせることにより、著しく粘度を上昇させることができる。増粘剤は、1種を単独で使用してもよいし、2種以上を組み合わせて使用してもよい。
本実施形態に係る組成物は、塩を更に含んでいてもよい。本明細書において塩とは、陽イオン(以下、「カチオン」ともいう。)と陰イオン(以下、「アニオン」ともいう。)とからなる化合物である。本実施形態における酸化セルロース及び/又はナノセルロースと、増粘剤との組み合わせによって上昇した粘度は、塩が含まれていても、低下することなく維持することができる。
これらの無機塩は、1種を単独で使用してもよいし、2種以上を組み合わせて使用してもよい。
これらのカチオンの中でも、粘度を維持する観点から、1価のカチオンを有する無機塩を用いることが好ましい。
本実施形態に係る組成物は、pH調整剤を更に含んでいてもよい。本明細書においてpH調整剤とは、pHを所定の範囲とする作用を有する剤である。本実施形態における酸化セルロース及び/又はナノセルロースと、増粘剤との組み合わせによって上昇した粘度は、pH調整剤が含まれていても、低下することなく維持することができる。
本実施形態に係る組成物は、更なる成分(任意成分)を含んでいてもよい。任意成分を含んでいても、増粘効果を発揮することができる。
本実施形態の組成物の態様としては、例えば、塗料及び化粧品が挙げられ、好ましくは化粧品である。
本発明の一実施形態は、組成物の製造方法であって、セルロースと増粘剤と、必要に応じて塩及び/又はpH調整剤と、を混合する工程を含み、前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まない、製造方法に関する。
本発明の一実施形態は、セルロースを含む水系組成物の粘度を調節する方法であって、前記水系組成物と増粘剤と、必要に応じて塩及び/又はpH調整剤と、を混合する工程を含み、前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まない、方法に関する。
なお、実施例における各種の値は、本発明の実施形態における好ましい下限値又は上限値としてもよい。また、実施例における同種の2つの値を適宜組み合わせて好ましい数値範囲としてもよい。
セルロース系原料として、市販の粉末セルロースを用いた。
ビーカーに、有効塩素濃度が42質量%である次亜塩素酸ナトリウム5水和物結晶を350g入れ、純水を加えて撹拌し、有効塩素濃度が21質量%の次亜塩素酸ナトリウム水溶液を得た。そこへ、35質量%塩酸を加えて撹拌し、pH11.0の水溶液とした。この次亜塩素酸ナトリウム水溶液を新東科学社製の撹拌機(スリーワンモータ、BL600)にて、プロペラ型撹拌羽根を使用して200rpmで撹拌しながら恒温水浴により30℃に加温した後、上記粉末セルロースを50g加えた。
セルロース系原料を供給後、同じ恒温水槽で30℃に保温した状態で、48質量%水酸化ナトリウムを添加しながら反応中のpHを11.0に調整して、30分間、上記撹拌機にて、プロペラ型撹拌羽根を使用して200rpmで撹拌し、酸化反応を行った。反応終了後、目開き0.1μmのPTFE製メンブランフィルターを使用して、吸引ろ過により生成物を固液分離し、酸化セルロースを得た。得られた酸化セルロースを純水で洗浄し、洗浄後のろ過上物(酸化セルロース)につき、カルボキシ基量を測定したところ、0.70mmol/gであった。
また、酸化セルロース中のN-オキシル化合物由来の窒素成分を、微量全窒素分析装置(日東精工アナリテック株式会社製、装置名:TN-2100H)を用いて窒素量として測定し、原料パルプからの増加分を算出した結果、1ppm以下であった。
(次亜塩素酸ナトリウム水溶液中の有効塩素濃度の測定)
次亜塩素酸ナトリウム5水和物結晶を純水に加えた水溶液0.582gを精密に量り、純水50mlを加え、ヨウ化カリウム2g及び酢酸10mlを加え、直ちに密栓して暗所に15分間放置した。15分間の放置後、遊離したヨウ素を0.1mol/Lチオ硫酸ナトリウム溶液で滴定した結果(指示薬 デンプン試液)、滴定量は34.55mlであった。別に空試験を行い補正し、0.1mol/Lチオ硫酸ナトリウム溶液1mlが3.545mgClに相当するので、次亜塩素酸ナトリウム水溶液中の有効塩素濃度は21質量%である。
(カルボキシ基量の測定)
酸化セルロースの濃度を0.5質量%に調整した酸化セルロース水分散体60mlに、0.1M塩酸水溶液を加えてpH2.5にした後、0.05Nの水酸化ナトリウム水溶液を滴下して、pHが11.0になるまで電気伝導度を測定し、電気伝導度の変化が穏やかな弱酸の中和段階において消費された水酸化ナトリウム量(a)から、下記式を用いてカルボキシ基量(mmol/g)を算出した。
カルボキシ基量=a(ml)×0.05/酸化セルロースの質量(g)
(1)試料管:ジルコニア製管(4mm径)
(2)磁場強度:9.4T(1H共鳴周波数:400MHz)
(3)MAS回転数:15kHz
(4)パルスシーケンス:CPMAS法
(5)コンタクトタイム:3ms
(6)待ち時間:5秒
(7)積算回数:10000~15000回
(8)測定装置:JNM ECA-400(日本電子社製)
また、得られた酸化セルロースが、グルコピラノース環の第2位及び第3位の水酸基が酸化されてカルボキシ基が導入された構造を有することは、当該酸化セルロースのモデル分子を試料とし、二次元NMRを測定した結果からも確認された。
また、第6位に係る、セルロース系原料の固体13C-NMRと、酸化セルロースの固体13C-NMRとのスペクトルデータの変化が見られなかったことから、第6位の水酸基は酸化されず、酸化セルロースにおいて水酸基のままであると判断した。
TEMPO酸化により得られたナノセルロースは、Angew. Chem. Int. Ed. 2021, 60, 24630-24636に準じて製造することにより入手した。すなわち、以下の方法により製造した。
TEMPOを0.016g及び臭化ナトリウムを0.1gビーカーに入れ、純水を加えて撹拌して水溶液とし、セルロース系原料として日本製紙社の粉末パルプ(KCフロックW-100GK)、を1.0g加えた。
上記水溶液をスターラーで撹拌しながら恒温水浴にて25℃に加温した後、0.1mol/L水酸化ナトリウムを加えて撹拌し、pH10.0の水溶液とした。そこへ、有効塩素濃度13.2質量%の次亜塩素酸ナトリウム水溶液2.58gを加え、同じ恒温水槽で25℃に保温した状態で、0.1mol/L水酸化ナトリウムを添加しながら反応中のpHを10.0に調整して、120分間スターラーで撹拌を行った。
反応終了後、目開き0.1μmのPTFE製メンブランフィルターを使用して、吸引ろ過により生成物を固液分離し、酸化セルロースを得た。得られたろ過上物を純水で洗浄した後に、カルボキシ基量を測定した。カルボキシ基量は1.55mmol/gで、ろ過上物量は約1.0gであった。また、酸化セルロース中のN-オキシル化合物由来の窒素成分を、微量全窒素分析装置(日東精工アナリテック株式会社製、装置名:TN-2100H)を用いて窒素量として測定し、原料パルプからの増加分を算出した結果、5ppmであった。この酸化セルロースを機械解繊することにより、TEMPO酸化により得られたナノセルロース水分散液(固形分2.0質量%)を得た。
市販の粉末セルロースをスターバーストで解繊して、機械解繊により得られたナノセルロース水分散液(固形分2.0質量%)を得た。
製造例1で得られた酸化セルロースを水分散液(固形分約10質量%)とし、ここに蒸留水を加えて、固形分5質量%に希釈した。この状態でホモミキサー(TOKUSHU KIKA ROBO MICS)を用いて10000rpm、60分間の撹拌を行い、酸化セルロースをCNFに解繊した。
別途、メチルセルロース(MC)の濃度1質量%の水溶液と蒸留水を準備した。固形分5質量%のCNF水分散液、1質量%のメチルセルロース水溶液、蒸留水を混合して所定のCNF/メチルセルロース/水の比率となったサンプルを調製した(具体的な比率は結果を参照のこと)。
粘度測定はせん断型レオメーター(Anton Paar、Physica MCR301)を用い、ジグは直径50mmの平行円盤型を使用した。せん断速度は0.01~100s-1、温度は25℃に設定した。測定は1つのサンプルに対して2回行い(0.01~100s-1の測定を1回行い、測定終了後20秒間静置した。その後、同じせん断速度範囲で2回目の測定を行った。)、2回目のデータを採用した。
比較製造例1で製造した、TEMPO酸化により得られたナノセルロース水分散液(固形分2.0質量%)、1質量%のメチルセルロース水溶液、蒸留水を混合して所定のCNF/メチルセルロース/水の比率となったサンプルを調製した。
比較製造例2で製造した、機械解繊により得られたナノセルロース水分散液(固形分2.0質量%)、1質量%のメチルセルロース水溶液、蒸留水を混合して所定のCNF/メチルセルロース/水の比率となったサンプルを調製した。
製造例1で得られた酸化セルロースを水分散液(固形分約10質量%)とし、ここに蒸留水を加えて、固形分5質量%に希釈した。この状態でホモミキサー(TOKUSHU KIKA ROBO MICS)を用いて10000rpm、60分間の撹拌を行い、酸化セルロースをCNFに解繊した(事前解繊)。
別途、固形分18質量%のアクリルエマルションと、メチルセルロースの水溶液1質量%を準備した。CNF5質量%水分散液、アクリルエマルション、1質量%のメチルセルロース水溶液と蒸留水を混合して所定のCNF/エマルション/メチルセルロースの比率にしたサンプル1を調製した。
実施例1と同様の粘度測定法で粘度測定を行った。
実施例2のサンプルから、CNFを除いたサンプル2、メチルセルロースを除いたサンプル3、並びにCNF及びメチルセルロースを除いたサンプル4を調製した。
実施例1と同様の粘度測定法で粘度測定を行った。
製造例1で得られた酸化セルロースを水分散液(固形分約10質量%)とし、ここに蒸留水を加えて、固形分5質量%に希釈した。この状態でホモミキサー(TOKUSHU KIKA ROBO MICS)を用いて10000rpm、60分間の撹拌を行い、酸化セルロースをCNFに解繊した。
CNFとメチルセルロースと水を所定の比率で混合したサンプルを調整した。
実施例1と同様の粘度測定法で粘度測定を行った。
実施例3のメチルセルロースに代えてグアーガム(GG)を使用したサンプルを調整した。
実施例1と同様の粘度測定法で粘度測定を行った。
製造例1で得られた酸化セルロースを水分散液(固形分約10質量%)とし、ここに蒸留水を加えて、固形分7.5質量%に希釈した。この状態でホモミキサー(TOKUSHU KIKA ROBO MICS)を用いて10000rpm、60分間の撹拌を行い、酸化セルロースをCNFに解繊した。
別途、メチルセルロース(MC)の濃度1質量%の水溶液を準備した。また、塩化ナトリウム(NaCl)の濃度12.5質量%の水溶液と蒸留水を準備した。固形分7.5質量%のCNF水分散液、1質量%のメチルセルロース水溶液、12.5質量%の塩化ナトリウム水溶液、蒸留水を混合して、全組成物量に対するCNF/メチルセルロース/塩化ナトリウムの比率が、1.0質量%/0.1質量%/0~1.0質量%であるサンプルを調製した。
各サンプルについて、実施例1と同様の粘度測定法で粘度測定を行った。
Carbopol(登録商標)980を用い、12.5質量%の塩化ナトリウム水溶液、蒸留水を混合して、全組成物量に対するCarbopol(登録商標)/塩化ナトリウムの比率が、0.075質量%/0~1.0質量%であるサンプルを調製した。
各サンプルについて、実施例1と同様の粘度測定法で粘度測定を行った。
Carbopol(登録商標)980を用い、12.5質量%の塩化ナトリウム水溶液、蒸留水を混合して、全組成物量に対するCarbopol(登録商標)/塩化ナトリウムの比率が、1.0質量%/0~1.0質量%であるサンプルを調製した。
各サンプルについて、実施例1と同様の粘度測定法で粘度測定を行った。
Carbopol(登録商標)Ultrez 30(以下、単にUltrez 30とも記載する)を用い、12.5質量%の塩化ナトリウム水溶液、蒸留水を混合して、全組成物量に対するUltrez 30/塩化ナトリウムの比率が、0.075質量%/0~1.0質量%であるサンプルを調製した。
各サンプルについて、実施例1と同様の粘度測定法で粘度測定を行った。
Ultrez 30を用い、12.5質量%の塩化ナトリウム水溶液、蒸留水を混合して、全組成物量に対するUltrez 30/塩化ナトリウムの比率が、1.0質量%/0~1.0質量%であるサンプルを調製した。
各サンプルについて、実施例1と同様の粘度測定法で粘度測定を行った。
製造例1で得られた酸化セルロースを水分散液(固形分約10質量%)とし、ここに蒸留水を加えて、固形分7.5質量%に希釈した。この状態でホモミキサー(TOKUSHU KIKA ROBO MICS)を用いて10000rpm、60分間の撹拌を行い、酸化セルロースをCNFに解繊した。
別途、メチルセルロース(MC)の濃度1質量%の水溶液と蒸留水を準備した。固形分7.5質量%のCNF水分散液、1質量%のメチルセルロース水溶液、蒸留水を混合して、全組成物量に対してCNF1質量%/メチルセルロース0.1質量%の比率であるサンプルを調製した。
上記サンプルのpHを、0.5M塩酸又は0.5M水酸化ナトリウム水溶液を用いて調整した。酸性側に調整する際は0.5M塩酸を用い、アルカリ性側に調整する際は0.5M水酸化ナトリウム水溶液を用い、pH計(HORIBA D-51 pH METER)の電極を前述のサンプルが入ったスクリュー管に浸して値を確認しながら上記試薬を滴下した。
実施例1と同様の粘度測定法で、せん断速度を1[1/s]及び10[1/s]とし、粘度測定を行った。結果を図11に示した。
Carbopol(登録商標)980と蒸留水とを混合して、全組成物量に対してCarbopol(登録商標)が0.1質量%の比率であるサンプルを調製した。このサンプルを用いたこと以外は、実施例6と同様にして、粘度測定を行った。結果を図11に示した。
Carbopol(登録商標)Ultrez 30と蒸留水とを混合して、全組成物量に対してUltrez 30が0.1質量%の比率であるサンプルを調製した。このサンプルを用いたこと以外は、実施例6と同様にして、粘度測定を行った。結果を図11に示した。
したがって、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースと増粘剤とを含む分散液は、粘度を上昇させることができ、かつ、pH変化による粘度低下を抑制できる。
Claims (22)
- セルロースと増粘剤とを含む、組成物であって、
前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まない、
組成物。 - セルロースと増粘剤とを含む、組成物であって、
前記セルロースが、グルコピラノース環の第2位及び第3位の水酸基が酸化されてジカルボキシ基が導入された構造を有する酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含む、
組成物。 - 前記増粘剤が、増粘多糖類である、
請求項1又は2に記載の組成物。 - 前記増粘剤が、前記酸化セルロース及び/又は前記ナノセルロースと疎水性相互作用することができる疎水性領域を有する、
請求項1又は2に記載の組成物。 - 前記増粘剤の量が、前記酸化セルロース及び/又は前記ナノセルロースの質量(固形分)に対して、0.1~40質量%である、
請求項1又は2に記載の組成物。 - 塩を更に含む、
請求項1又は2に記載の組成物。 - 前記塩の量が、前記組成物に対して、0.01~10質量%である、
請求項6に記載の組成物。 - pH調整剤を更に含む、
請求項1又は2に記載の組成物。 - 前記組成物のpHが、0以上14.0以下の範囲内である、
請求項8に記載の組成物。 - 前記pH調整剤が、酸又は塩基を含む、
請求項8に記載の組成物。 - 前記セルロースが、前記ナノセルロースを含む、
請求項1又は2に記載の組成物。 - 前記組成物が、水系組成物である、
請求項1又は2に記載の組成物。 - 前記水系組成物の粘度が、0.01~1000Pa・sである、
請求項12に記載の組成物。 - 前記水系組成物の粘度が、前記水系組成物から前記増粘剤を除いた対照組成物の粘度よりも、10~1×106%高い、
請求項12に記載の組成物。 - セルロースと増粘剤とを含む、組成物であって、
前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まず、
前記組成物のpHが、0以上14.0以下の範囲内である、
組成物。 - セルロースと増粘剤とを含む、組成物であって、
前記セルロースが、グルコピラノース環の第2位及び第3位の水酸基が酸化されてジカルボキシ基が導入された構造を有する酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、
前記組成物のpHが、0以上14.0以下の範囲内である、
組成物。 - 前記組成物が、化粧品である、
請求項1、2、15及び16のいずれか一項に記載の組成物。 - 組成物の製造方法であって、
セルロースと増粘剤とを混合する工程を含み、
前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まない、
製造方法。 - 組成物の製造方法であって、
セルロースと増粘剤とを混合する工程を含み、
前記セルロースが、グルコピラノース環の第2位及び第3位の水酸基が酸化されてジカルボキシ基が導入された構造を有する酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含む、
製造方法。 - セルロースを含む水系組成物の粘度を調節する方法であって、
前記水系組成物と増粘剤とを混合する工程を含み、
前記セルロースが、次亜塩素酸又はその塩によるセルロース系原料の酸化物である酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含み、かつ、N-オキシル化合物を実質的に含まない、
方法。 - セルロースを含む水系組成物の粘度を調節する方法であって、
前記水系組成物と増粘剤とを混合する工程を含み、
前記セルロースが、グルコピラノース環の第2位及び第3位の水酸基が酸化されてジカルボキシ基が導入された構造を有する酸化セルロース、及び/又は前記酸化セルロースの解繊物であるナノセルロースを含む、
方法。 - 前記水系組成物と前記増粘剤とを混合することにより、前記水系組成物の粘度を10~1×106%上昇させる、
請求項20又は21に記載の方法。
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012126788A (ja) * | 2010-12-14 | 2012-07-05 | Dai Ichi Kogyo Seiyaku Co Ltd | 粘性水系組成物 |
| JP2017036217A (ja) * | 2015-08-04 | 2017-02-16 | 王子ホールディングス株式会社 | 化粧料 |
| WO2018030392A1 (ja) * | 2016-08-08 | 2018-02-15 | 日本製紙株式会社 | セルロースナノファイバー分散液の評価方法、セルロースナノファイバー水分散液、並びにセルロースナノファイバーを含有する食品、化粧品、及びゴム組成物 |
| WO2018230354A1 (ja) | 2017-06-16 | 2018-12-20 | 東亞合成株式会社 | セルロースナノファイバーの製造方法 |
| WO2020027307A1 (ja) | 2018-08-03 | 2020-02-06 | 東亞合成株式会社 | 酸化セルロース、酸化セルロースおよびナノセルロースの製造方法ならびにナノセルロース分散液 |
| JP2020033398A (ja) * | 2018-08-27 | 2020-03-05 | 王子ホールディングス株式会社 | 微細繊維状セルロース含有組成物およびその製造方法 |
| WO2022009979A1 (ja) | 2020-07-09 | 2022-01-13 | 東亞合成株式会社 | 酸化セルロース、ナノセルロース及びそれらの分散液 |
| WO2022009980A1 (ja) | 2020-07-09 | 2022-01-13 | 東亞合成株式会社 | ナノセルロース及びその分散液 |
| JP2023013727A (ja) * | 2021-07-16 | 2023-01-26 | 東亞合成株式会社 | 酸化セルロース、ナノセルロース及びそれらの分散液 |
-
2024
- 2024-06-05 CN CN202480043411.0A patent/CN121399166A/zh active Pending
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- 2024-06-05 EP EP24831593.9A patent/EP4737485A1/en active Pending
- 2024-06-05 JP JP2025529575A patent/JPWO2025004723A1/ja active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012126788A (ja) * | 2010-12-14 | 2012-07-05 | Dai Ichi Kogyo Seiyaku Co Ltd | 粘性水系組成物 |
| JP2017036217A (ja) * | 2015-08-04 | 2017-02-16 | 王子ホールディングス株式会社 | 化粧料 |
| WO2018030392A1 (ja) * | 2016-08-08 | 2018-02-15 | 日本製紙株式会社 | セルロースナノファイバー分散液の評価方法、セルロースナノファイバー水分散液、並びにセルロースナノファイバーを含有する食品、化粧品、及びゴム組成物 |
| WO2018230354A1 (ja) | 2017-06-16 | 2018-12-20 | 東亞合成株式会社 | セルロースナノファイバーの製造方法 |
| WO2020027307A1 (ja) | 2018-08-03 | 2020-02-06 | 東亞合成株式会社 | 酸化セルロース、酸化セルロースおよびナノセルロースの製造方法ならびにナノセルロース分散液 |
| JP2020033398A (ja) * | 2018-08-27 | 2020-03-05 | 王子ホールディングス株式会社 | 微細繊維状セルロース含有組成物およびその製造方法 |
| WO2022009979A1 (ja) | 2020-07-09 | 2022-01-13 | 東亞合成株式会社 | 酸化セルロース、ナノセルロース及びそれらの分散液 |
| WO2022009980A1 (ja) | 2020-07-09 | 2022-01-13 | 東亞合成株式会社 | ナノセルロース及びその分散液 |
| JP2023013727A (ja) * | 2021-07-16 | 2023-01-26 | 東亞合成株式会社 | 酸化セルロース、ナノセルロース及びそれらの分散液 |
Non-Patent Citations (2)
| Title |
|---|
| ANGEW. CHEM. INT. ED., vol. 60, 2021, pages 24630 - 24636 |
| SUSTAINABLE CHEM. ENG., vol. 8, no. 48, 2020, pages 17800 - 17806 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026094688A1 (ja) * | 2024-10-30 | 2026-05-07 | 東亞合成株式会社 | 乳化剤並びに乳化組成物及びその製造方法 |
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