Composite particle and method for producing same, personal care product, particles for personal care and method for producing same, personal care goods, and composition for personal care
A technology for composite particles and personal care, which is applied in skin care preparations, hair care, oral care, etc. It can solve the problems of poor use feeling and inability to maintain the shape of particles, and achieve environmental load reduction, smoothness and skin affinity. Good sex and good skin affinity
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no. 1 approach
[0075] Such as Figure 1A , Figure 1B , Figure 1C As shown, the composite particle 1 of the present embodiment has: a core particle 2 having pores (pore: pore) 4; at least one of the fine fibers 3 . That is, the fine fibers 3 may be only one of cellulose nanofibers and chitin nanofibers, or both may be included.
[0076] exist Figure 1A In the composite particle 1 shown, the core particle 2 has a large number of small pores 4 . which is, Figure 1A A composite particle 1 in which the core particle 2 is a porous particle is shown. In the core particle 2, there is a part where the pores 4 exist independently, and there is also a part where a plurality of pores 4 are connected together. Some of the pores 4 existing in the outer peripheral portion of the core particle 2 open on the surface of the core particle 2, and some do not.
[0077] exist Figure 1B In the composite particle 1 shown, the core particle 2 has a plurality of relatively large pores 4 . which is, Figu...
no. 2 approach
[0343] Such as Figure 4 As shown, the personal care particle 1A of the present embodiment is composed of a core particle 2A formed of a polymer-containing material, microfibers 3 bonded to the surface of the core particle 2A and in an inseparable state, and a personal care function. Functional materials40. The fine fibers 3 are either cellulose nanofibers or chitin nanofibers. The functional material 40 is carried on the fine fiber 3 . The fine fibers 3 may contain both cellulose nanofibers and chitin nanofibers.
[0344] In the present embodiment, the fine fibers 3 are formed as a coating layer covering the surface of the core particle 2A.
[0345] The method for producing the granule 1A for personal care is not particularly limited, and a known method can be used, and a chemical production method or a physicochemical production method can be used.
[0346] Examples of chemical production methods include polymerization granulation methods (emulsion polymerization method,...
Embodiment 1
[0582] (First step: step of obtaining cellulose nanofiber dispersion liquid)
[0583] {TEMPO Oxidation of Wood Cellulose}
[0584] 70 g of softwood kraft pulp was suspended in 3500 g of distilled water, a solution obtained by dissolving 0.7 g of TEMPO and 7 g of sodium bromide in 350 g of distilled water was added, followed by cooling to 20°C. Thereto, 450 g of a 2 mol / L aqueous solution of sodium hypochlorite with a density of 1.15 g / mL was added dropwise to start the oxidation reaction. The temperature in the system was kept constant at 20° C., and a 0.5 N aqueous sodium hydroxide solution was added during the reaction as the pH decreased, so that the pH continued to be kept at 10. When the total amount of sodium hydroxide added reached 3.0 mmol / g relative to the weight of cellulose, about 100 mL of ethanol was added to stop the reaction. Subsequently, filtration washing was repeated with distilled water using a glass filter to obtain oxidized pulp (oxidized cellulose).
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Abstract
Description
Claims
Application Information
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