CN-121971676-A - Double-gel fragrance slow release carrier and preparation method thereof

CN121971676ACN 121971676 ACN121971676 ACN 121971676ACN-121971676-A

Abstract

A double gel fragrance slow release carrier and a preparation method thereof relate to the technical field of materials and comprise an aerogel core body and an oil gel coating coated on the surface of the aerogel core body, wherein the aerogel core body is prepared from a polysaccharide-based gel agent, a polyol plasticizer, a pore regulator and a flame retardant, and the oil gel coating is prepared by mixing a lipophilic gel agent and a wax-based dispersion medium. The aerogel can uniformly disperse and stably load the fragrance components by virtue of the ultrahigh specific surface area and the chemically modifiable inner and outer surfaces, and the continuous nano pore channels of the aerogel provide controllable diffusion paths, so that the effects of slow release and controlled release are realized. The three-dimensional network formed by the oleogel can accurately regulate and control the volatilization rate of the fragrance components, and the synergistic effect of the three-dimensional network and the oleogel realizes long-time linear release of the fragrance components, so that the problems of uneven release and short duration of the traditional fragrance carrier are solved.

Inventors

GAO HAINAN
Mukdes abulaizi
LI YING
Tong Yaxuan
WU HUA
YE HONG
WENG YUNXUAN

Assignees

北京工商大学

Dates

Publication Date: 20260505
Application Date: 20260211

Claims (10)

1. The double gel fragrance slow release carrier is characterized by comprising an aerogel core body and an oil gel coating coated on the surface of the aerogel core body; The aerogel core is prepared from a polysaccharide-based gel, a polyol plasticizer, a pore regulator and a flame retardant, and the oil gel coating is prepared by mixing a lipophilic gel and a wax-based dispersion medium.
2. The dual gel fragrance slow release carrier of claim 1, wherein the mass ratio of the polysaccharide-based gelling agent, the polyol plasticizer, the pore control agent, and the flame retardant in the aerogel core is 1 (0.2-0.5): 1.5-2.5): 2.5-3.5.
3. The dual gel fragrance slow release carrier of claim 2, wherein the polysaccharide-based gelling agent comprises at least one of carrageenan, sodium alginate, gelatin, agar, and gellan gum, the polyol plasticizer comprises at least one of glycerol, sorbitol, polyethylene glycol, and propylene glycol, the pore regulator comprises at least one of hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose, and microcrystalline cellulose, and the flame retardant comprises at least one of ammonium polyphosphate, triethyl phosphate, aluminum hypophosphite, expanded graphite, and zinc borate.
4. The dual gel fragrance slow release carrier of claim 1, wherein the aerogel core further comprises 1wt% to 10wt% bio-based filler comprising at least one of bamboo powder, straw powder, coffee grounds, and lignin.
5. The dual gel fragrance slow release carrier according to claim 1, wherein the mass ratio of the lipophilic gelling agent to the wax-based dispersion medium is 1 (2-10).
6. The dual gel fragrance slow release carrier of claim 1, wherein the lipophilic gelling agent comprises trans-polyisoprene and the wax-based dispersion medium comprises at least one of soy wax, carnauba wax, beeswax, candelilla wax, and paraffin wax.
7. The dual gel fragrance slow release carrier according to claim 1, wherein the thickness of the oil gel coating is 0.2-1.0 mm, the surface reserved partial area of the aerogel core body is not coated with the oil gel coating as a channel area, and the area of the channel area is 50-100 mm 2 .
8. A method for preparing the dual gel fragrance slow release carrier according to any one of claims 1 to 7, comprising: S1, dissolving the polysaccharide-based gel, the polyol plasticizer, the pore regulating agent and the flame retardant in water to form sol, and pouring the sol into a mold to form the aerogel core; And S2, melting and mixing the lipophilic gel and the wax-based dispersion medium, spreading the mixture on the surface of the aerogel core body, and cooling and solidifying the mixture to form the oil gel coating.
9. The method according to claim 8, wherein in step S1, the sol is formed by stirring and dissolving at 40-60 ℃, then the sol is formed by aging at 0-5 ℃, and the aerogel core is obtained by freeze-drying at-60 to-40 ℃.
10. The method according to claim 8, wherein in step S2, the temperature of the melt mixing is 90 to 110 ℃.

Description

Double-gel fragrance slow release carrier and preparation method thereof Technical Field The invention relates to the technical field of materials, in particular to a double-gel fragrance slow release carrier and a preparation method thereof. Background Fragrance sticks have found wide use in recent years as a fragrance diffusion medium in home, vehicle and business space settings. The working principle is that liquid fragrance is adsorbed to the surface of a carrier by capillary action and then slowly volatilized into the air, so that the lasting and uniform release of fragrance is realized. The preparation method of the fragrance stick mainly comprises the following steps of taking natural rattan/wood stick as a raw material, drying and carrying out bacterial treatment, and then soaking the fragrance stick in fragrance liquid. The cost of the method is lower, but the pore distribution is uneven, the porosity is low, and the sustained effect of releasing the fragrance is poor. In addition, the natural materials have poor flame retardant property and also have the problem of easy mildew and worm damage. Secondly, modified fibers are used as raw materials, absorbent cotton is required to be subjected to sulfhydrylation treatment, and then grafting copolymerization reaction is carried out on the absorbent cotton, eugenol and dihydromyrcenol to prepare the flexible rod body. The adsorption rate of the material is obviously improved, but the preparation process is complex, toxic sulfur-containing compounds are needed, and the material does not meet the green requirement. Thirdly, ultra-high molecular weight polyethylene micro powder is used as a raw material, and is subjected to amphiphilic modification treatment to prepare a rigid rod body, so that the material can save the fragrance consumption and has self-cleaning and mildew-proof functions, but has higher cost and is suitable for high-end vehicle scenes. The traditional rattan-tag type fragrance carrier is developed to an intelligent fragrance carrier, the fragrance carrier is changed from a pure carrier material to a micro-environment regulating device, and the fragrance carrier has a wider application prospect in the fields of health, marketing, personal experience and the like in the future. The development of new fragrance carriers with high load, controllable cost and accurate controlled release effect is still an important direction of development in the field. Disclosure of Invention The invention aims to provide a double-gel fragrance slow release carrier and a preparation method thereof, and the double-gel fragrance slow release carrier has the advantages of strong adsorption capacity, uniform slow release effect, long duration and controllable cost. Embodiments of the present invention are implemented as follows: A dual gel fragrance slow release carrier comprises an aerogel core body and an oil gel coating coated on the surface of the aerogel core body; The aerogel core is prepared from a polysaccharide-based gel, a polyol plasticizer, a pore regulator and a flame retardant, and the oil gel coating is prepared by mixing a lipophilic gel and a wax-based dispersion medium. The preparation method of the double gel fragrance slow release carrier comprises the following steps: s1, dissolving a polysaccharide-based gel, a polyol plasticizer, a pore regulator and a flame retardant in water to form sol, pouring the sol into a mold, and molding to obtain an aerogel core; s2, melting and mixing the lipophilic gel and the wax-based dispersion medium, scraping and coating the mixture on the surface of the aerogel core body, and cooling and solidifying the mixture to form the oil gel coating. The embodiment of the invention has the beneficial effects that: The embodiment of the invention provides a double-gel fragrance slow release carrier and a preparation method thereof, wherein the double-gel fragrance slow release carrier comprises an aerogel core body and an oil gel coating coated on the surface of the aerogel core body, the aerogel core body is prepared from a polysaccharide-based gel agent, a polyalcohol plasticizer, a pore regulator and a flame retardant, and the oil gel coating is prepared by mixing a lipophilic gel agent and a wax-based dispersion medium. The aerogel can uniformly disperse and stably load the fragrance components by virtue of the ultrahigh specific surface area and the chemically modifiable inner and outer surfaces, and the continuous nano pore channels of the aerogel provide controllable diffusion paths, so that the effects of slow release and controlled release are realized. The three-dimensional network formed by the oleogel has excellent phase-change heat storage function, absorbs heat from the environment when the temperature is raised, prevents the rapid release of the internal fragrance components, further can accurately regulate and control the volatilization rate of the fragrance components, realizes long-time linear relea