A compound camellia seed essential oil, a preparation method thereof and applications thereof in cosmetics

Abstract

The present invention discloses a compound camellia seed essential oil, a preparation method thereof and its application in cosmetics. The compound camellia seed essential oil is composed of the following components: camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil and artemisia annua volatile oil. The compound camellia seed essential oil of the present invention combines the excellent characteristics of camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil and artemisia annua volatile oil, providing comprehensive skin care effects. This compound camellia seed essential oil deeply moisturizes, effectively anti-inflammatory, fades skin spots, and promotes hair growth, and is suitable for various skin types. Its natural ingredients ensure high safety and extremely low risk of side effects, and it is an ideal choice for a variety of cosmetics.

Description

Technical Field

[0001] The present invention relates to the field of daily chemical products, and specifically relates to a compound camellia seed essential oil, a preparation method thereof, and an application thereof in cosmetics. Background Art

[0002] In the field of cosmetics, essential oils have increasingly gained favor among consumers due to their natural origin, pure ingredients, and diverse skin care benefits. In particular, camellia seed oil has become a key ingredient in various skin care products because of its unique antioxidant properties and delicate molecular structure. This oil contains abundant natural antioxidants such as tea polyphenols and vitamin E, which can effectively neutralize free radicals, slow down the skin aging process, and help the skin maintain a youthful state. At the same time, the mild nature of camellia seed oil makes it a preferred choice for sensitive skin care. Nevertheless, relying solely on camellia seed oil still has limited effects in addressing various complex skin problems such as inflammation, skin laxity, and skin pigmentation. Therefore, the cosmetics industry is actively exploring strategies to combine camellia seed oil with other natural essential oils to more comprehensively meet consumers' needs for skin care.

[0003] Currently, cosmetics on the market mainly focus on using single or a few combinations of essential oils, which is insufficient in meeting consumers' demands for diversified skin care products. For example, although rose essential oil is widely used due to its excellent nourishing and repairing abilities, its anti-inflammatory effect and the ability to regulate the skin microecological balance are mediocre. Although lavender essential oil has good anti-inflammatory and soothing effects, its effects in deep nourishing and anti-aging are not prominent. As for rosemary essential oil and artemisia annua volatile oil, although they each have different characteristics, their applications in cosmetics still need to be combined with other ingredients to better exert their effects.

[0004] In addition, with consumers' increasing attention to the safety and naturalness of cosmetic ingredients, the cosmetics industry faces the challenge of providing safer, more natural, and more comprehensive-effect products. Many existing cosmetics may neglect the safety of ingredients and their adaptability to sensitive skin while pursuing efficacy. Therefore, developing a compound essential oil that combines multiple natural essential oil ingredients can not only provide more comprehensive skin care effects but also meet the market's demand for safe and natural skin care products. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a compound camellia seed essential oil, a preparation method thereof, and an application thereof in cosmetics.

[0006] The inventive concept of the present invention is to propose a compound camellia seed essential oil, which combines the advantages of camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil and artemisia annua volatile oil, aiming to solve the limitations of existing single essential oils or limited combinations of essential oils in skin care effects. This compound essential oil not only performs excellently in nourishing, anti-aging, anti-inflammatory, etc., but also is applicable to a variety of skin types, including sensitive skin.

[0007] Specifically, the technical solution of the present invention is as follows:

[0008] The present invention provides a compound camellia seed essential oil, which is composed of the following components: camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil and artemisia annua volatile oil.

[0009] Preferably, a compound camellia seed essential oil is composed of the following components in parts by weight: 20-40 parts of camellia seed oil, 2-12 parts of rose essential oil, 2-10 parts of lavender essential oil, 1-8 parts of rosemary essential oil and 0.05-0.9 part of artemisia annua volatile oil.

[0010] Preferably, a compound camellia seed essential oil is composed of the following components in parts by weight: 25-35 parts of camellia seed oil, 4-10 parts of rose essential oil, 3-8 parts of lavender essential oil, 1-5 parts of rosemary essential oil and 0.1-0.5 part of artemisia annua volatile oil.

[0011] Preferably, a compound camellia seed essential oil is composed of the following components in parts by weight: 32 parts of camellia seed oil, 7 parts of rose essential oil, 5 parts of lavender essential oil, 2 parts of rosemary essential oil and 0.2 part of artemisia annua volatile oil.

[0012] The present invention also provides a preparation method of a compound camellia seed essential oil, which includes the following steps: stirring and mixing camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil and artemisia annua volatile oil evenly.

[0013] The present invention also provides a preparation method of a compound camellia seed essential oil microcapsule, which includes the following steps:

[0014] (1) Adding hyaluronic acid, sodium caseinate, tannic acid (CAS No.: 1401-55-4), succinaldehyde bis(dimethyl acetal) (CAS No.: 6922-39-0) into water and stirring to form a wall material solution;

[0015] (2) Adding emulsifier soy lecithin into the compound camellia seed essential oil and stirring to obtain an oily solution;

[0016] (3) Mixing the wall material solution with the oily solution;

[0017] (4) Homogenizing;

[0018] (5) Spray drying;

[0019] (6) Sieving.

[0020] The present invention also provides a composite camellia seed essential oil microcapsule, which is prepared by the above method.

[0021] The present invention also provides an application of the composite camellia seed essential oil in cosmetics.

[0022] The present invention also provides an application of the composite camellia seed essential oil microcapsule in cosmetics.

[0023] Preferably, the cosmetics are cream, lotion, essence, massage oil, shampoo, conditioner, facial mask, lip balm or perfume.

[0024] Cream and lotion: Suitable for daily skin moisturizing and nourishing.

[0025] Essence: Used for deep skin care to improve skin problems.

[0026] Massage oil: Used for relaxing and moisturizing the body skin.

[0027] Shampoo and conditioner: Used for nourishing and repairing hair.

[0028] Facial mask: Provides deep cleansing and skin repair.

[0029] Lip balm: Used for moisturizing and repairing dry lips.

[0030] Perfume: Provides a long-lasting body fragrance with its unique aroma.

[0031] The composite camellia seed essential oil of the present invention combines the advantages of camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil and artemisia annua volatile oil, providing comprehensive and efficient skin care effects. The core role of camellia seed oil lies in its delicate molecular structure and rich antioxidant components, such as tea polyphenols and vitamin E, which deeply nourish the skin, promote metabolism, and effectively resist signs of aging, such as fine lines and wrinkles. Artemisia annua volatile oil, with its significant anti-inflammatory properties and ability to regulate the skin microecology, is particularly suitable for sensitive skin, enhancing the skin barrier and improving the overall resistance of the skin. This composite essential oil is suitable for various skin types, can deeply moisturize, reduce inflammation, fade skin spots, and promote hair growth at the same time. The natural ingredients ensure high safety and minimize the risk of side effects, making it an ideal additive for a variety of cosmetics. Detailed implementation mode

[0032] A composite camellia seed essential oil is composed of the following components in parts by weight: 25 - 35 parts of camellia seed oil, 4 - 10 parts of rose essential oil, 3 - 8 parts of lavender essential oil, 1 - 5 parts of rosemary essential oil, and 0.1 - 0.5 part of artemisia annua volatile oil. Stir and mix the camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil and artemisia annua volatile oil evenly to obtain the composite camellia seed essential oil of the present invention. Specifically, the preparation steps are as follows:

[0033] (1) Weigh the raw materials: Use an accurate electronic scale to accurately weigh the weight portions of each essential oil, ensuring accuracy in accordance with the above ratios.

[0034] (2) Mix the essential oils: First add camellia seed oil to the mixing container, and then sequentially add rose essential oil, lavender essential oil, rosemary essential oil, and Artemisia annua volatile oil. Using a measuring cylinder or dropper can improve the accuracy of adding essential oils.

[0035] (3) Stir evenly: Use a magnetic stirrer to gently and evenly stir the mixture to avoid destroying some sensitive components due to overly intense stirring. It is recommended to carry out the stirring process at room temperature to maintain the active ingredients of the essential oils.

[0036] (4) Temperature monitoring: Use a thermometer to monitor the temperature of the mixture throughout the stirring process to ensure that it does not exceed 30°C to avoid the potential impact of heat on the essential oil components.

[0037] (5) Standing and inspection: After stirring evenly, let the mixture stand at room temperature for a period of time to ensure that all components are fully integrated.

[0038] (6) Quality inspection: Conduct a sensory evaluation of the final product, including color, odor, and texture, to ensure the consistency and high quality of each batch of products.

[0039] (7) Storage: Transfer the prepared compound camellia seed essential oil to a dark glass bottle to avoid light and heat sources to maintain its stability and extend its shelf life.

[0040] The following is a detailed introduction to the five monomer essential oils involved in the present invention:

[0041] Camellia seed oil plays a central role as the base oil in this compound essential oil formula. With its various bioactive components and unique molecular structure, it provides deep nutrition and protection for the skin. This oil is renowned for its tiny and delicate molecular structure, enabling it to rapidly penetrate the epidermis and reach the dermis layer of the skin. This property makes Camellia seed oil particularly effective in deep skin care, promoting the proliferation of skin fibroblasts, thereby enhancing the intrinsic vitality and health of the skin. The chemical structure of the abundant oleic acid in Camellia seed oil is very similar to that of the body's own sebum, which endows it with extremely high biocompatibility. Therefore, the skin can absorb Camellia seed oil more easily and quickly, making it an ideal ingredient for accelerating skin repair and regeneration. In addition, Camellia seed oil also contains antioxidant components such as coenzyme Q10, phytosterols, and vitamin E. These components together form a powerful antioxidant network, effectively neutralizing free radicals, thus reducing the oxidative stress and damage caused by environmental factors to the skin. Due to these unique properties, Camellia seed oil performs excellently in promoting skin metabolism, inhibiting skin inflammation, repairing damaged skin, and whitening and moisturizing. Long-term use of Camellia seed oil can significantly improve the skin's gloss and fineness, while enhancing the skin's elasticity and firmness. In addition, its anti-aging property also helps to reduce the formation of wrinkles and delay the skin aging process. In summary, Camellia seed oil plays an indispensable role in the compound essential oil of this invention. Its delicate molecular structure, oleic acid with extremely high biocompatibility, and powerful antioxidant composition jointly provide comprehensive care for the skin, promote skin health, improve skin quality, and help maintain the youthful state and vitality of the skin.

[0042] Rose essential oil, known as the "Queen of Essential Oils," is renowned for its remarkable benefits in skin beautification and mood regulation. This essential oil not only enriches the aroma of the camellia seed oil compound but also plays a key role in skin health and beauty care. Rose essential oil contains a variety of bioactive compounds, such as aromatic compounds, polyphenols, and organic acids, which work together to provide multiple skin care benefits. First, rose essential oil excels in enhancing skin's immune function. Its bioactive ingredients stimulate the skin's natural defense mechanisms, enhancing its resistance to environmental factors. These ingredients also improve the skin's ability to retain moisture, helping it maintain a proper moisture balance, thereby preventing dryness and dehydration and keeping it soft and smooth. Furthermore, the active ingredients in rose essential oil promote the activity of elastin and collagen fibers in the skin, which are crucial for maintaining skin firmness and elasticity. This stimulation helps reduce the appearance of fine lines and wrinkles, maintaining a youthful appearance. Rose essential oil also has unique therapeutic effects on conditions such as dilated capillaries in the skin. Its anti-inflammatory and calming properties can reduce redness and inflammation, especially for sensitive or reddening skin types. Furthermore, rose essential oil effectively regulates the endocrine system, thereby affecting skin pigmentation. It promotes the breakdown and metabolism of melanin, reducing the appearance of dark spots and uneven skin tone, resulting in a more even, brighter appearance. In summary, rose essential oil plays a multifaceted role in this camellia seed oil complex. It not only improves skin's moisturizing properties, enhances immune function, and maintains skin elasticity, but also effectively combats capillary dilation, regulates endocrine function, and aids in pigment metabolism and whitening, resulting in a more youthful, healthy, and radiant appearance.

[0043] Lavender essential oil plays a multifunctional role in the compound essential oil formula of the present invention. This essential oil is widely recognized for its unique skin repair and maintenance properties, especially in promoting cell regeneration, balancing sebum secretion, and strengthening the skin's natural defense mechanisms. Its unique chemical composition, such as terpene, ketone, and alcohol compounds, endows it with remarkable antibacterial, anti-inflammatory, and healing properties. First of all, lavender essential oil can stimulate the renewal and proliferation of skin cells, thus accelerating the recovery process of damaged tissues. This property makes it an ideal choice for treating blemishes, acne, and minor cuts or burns. It effectively reduces the likelihood of scar formation by promoting the formation of new cells and accelerating the healing of damaged skin. In terms of regulating sebum secretion, lavender essential oil normalizes overactive sebaceous glands through its balancing properties, thereby reducing excessive oil production. This effect is particularly beneficial for oily and combination skin, helping to relieve skin greasiness and reduce the formation of acne and blackheads caused by oil blockage. In addition, the antibacterial and anti-inflammatory properties of lavender essential oil make it an effective ingredient for treating skin inflammation and infections. It can effectively inhibit the growth of a variety of pathogenic bacteria and viruses, reducing the risk of skin infections. At the same time, its anti-inflammatory property helps to reduce skin redness, swelling, and pain, especially prominent in dealing with acne and dermatitis. Lavender essential oil also has significant moisturizing effects, which can help the skin maintain an appropriate moisture balance, thus keeping the skin soft and smooth. It provides deep moisturization and soothing for dry or dehydrated skin by enhancing the skin barrier function and reducing water loss. Generally speaking, the role of lavender essential oil in this compound essential oil cannot be underestimated. It not only provides deep care and repair for the skin but also plays an important role in regulating sebum secretion, antibacterial anti-inflammatory, and moisturizing. Therefore, lavender essential oil is an ideal ingredient suitable for various skin types, especially for skin prone to acne, enlarged pores, or sensitive skin, and can provide gentle and effective care.

[0044] Rosemary essential oil plays multiple important roles in the compound essential oil formula of the present invention, especially in body care and promoting hair health. As an essential oil widely used in both traditional and modern dermatology, rosemary essential oil offers a series of remarkable skin and hair care effects due to its unique chemical composition and biological activities. First of all, one of the main components of rosemary essential oil is 1,8-cineole, and this compound has been scientifically proven to have significant antioxidant and anti-inflammatory properties. It can effectively neutralize the oxidative stress caused by free radicals, thus reducing skin aging and inflammation. In addition, rosemary essential oil also contains abundant phenolic compounds such as rosmarinic acid and cinnamic acid, and these compounds further enhance its antioxidant and anti-inflammatory effects. In conditioning oily or unclean skin, rosemary essential oil exhibits a significant astringent effect. It helps reduce the production of excessive sebum by regulating skin oil secretion, thereby reducing oiliness and preventing pore blockage, and is an ideal choice for treating oily skin and acne problems. At the same time, its property of promoting blood circulation helps enhance the oxygen and nutrient supply to skin cells, accelerate cell metabolism, and promote skin health and regeneration. For hair health, rosemary essential oil has been proven to promote hair growth and reduce hair loss. It stimulates blood circulation in the scalp and enhances the vitality of hair follicles, thus promoting hair growth and strength. This essential oil also helps improve scalp health and reduce the production of dandruff, making the hair look healthier and shinier. Rosemary essential oil also shows benefits in terms of internal health of the system, especially in strengthening liver function and lowering blood sugar. Its active ingredients can promote the liver detoxification process and improve the health condition of the liver. In addition, research shows that rosemary essential oil has a positive effect on regulating blood sugar levels and provides potential help for the prevention and treatment of arteriosclerosis and rheumatic pain. In short, rosemary essential oil in the compound essential oil of the present invention not only provides external care for the skin and hair, but also brings profound benefits to overall health. It plays an important role in maintaining skin health and promoting hair growth through its unique antioxidant, anti-inflammatory, astringent and blood circulation promoting properties, and also has a positive impact on the health of internal organs.

[0045] Artemisia annua volatile oil, as a less common but highly effective ingredient in the skincare field, plays a crucial role in the compound essential oil formula of the present invention. This unique volatile oil is highly regarded for its powerful anti-inflammatory properties and skin microecology regulation ability. Scientific research shows that Artemisia annua volatile oil contains various bioactive compounds, such as artemisinin, sesquiterpenoids, and flavonoids, which work together on the skin to provide multi-faceted protection and repair effects. One of the main characteristics of Artemisia annua volatile oil is its potent anti-inflammatory ability. It can significantly inhibit key mediators in skin inflammatory responses, such as prostaglandins and leukotrienes, thereby reducing skin redness, itching, and discomfort caused by various inflammatory factors (such as ultraviolet rays, chemical irritation, or microbial infections). This makes Artemisia annua volatile oil an effective ingredient for treating sensitive skin and inflammatory skin diseases, such as eczema and acne. In addition, Artemisia annua volatile oil also performs excellently in regulating the skin microecological balance. It can inhibit the growth of various pathogenic microorganisms, including bacteria, fungi, and viruses, thus maintaining the balance of the healthy skin flora on the skin surface. This microecological balance is crucial for skin health, can reduce the risk of skin infections, and at the same time enhance the skin's natural defense ability. Moreover, the enhancement of the skin barrier function by Artemisia annua volatile oil is also one of its important characteristics. By promoting the synthesis and repair of skin barrier proteins, such as keratin and sericin, Artemisia annua volatile oil helps to enhance the integrity of the skin barrier, reduce water loss, and prevent the intrusion of external irritants. This strengthening of the skin barrier is particularly important for dry, dehydrated, or sensitive skin, and can significantly improve the overall health and resistance of the skin. In summary, Artemisia annua volatile oil plays an indispensable role in the compound essential oil of the present invention. It not only has a significant anti-inflammatory effect, effectively soothes and improves the condition of sensitive skin, but also can regulate the skin microecology, enhance the skin barrier function, and strengthen the overall resistance of the skin. These characteristics make Artemisia annua volatile oil a highly efficient and multi-functional skincare ingredient that can play an important role in the prevention and treatment of various skin problems.

[0046] The compound camellia seed essential oil of the present invention combines camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil, and Artemisia annua volatile oil, each with unique skincare and aroma characteristics, making this compound essential oil have broad application potential in the cosmetics field. Specifically:

[0047] Facial creams and lotions: Can effectively moisturize and nourish the skin, and improve skin texture.

[0048] Serums: Used to solve specific skin problems, such as improving fine lines, dullness, or acne.

[0049] Massage oils: Suitable for body care, can be used to relax muscles and moisturize the skin.

[0050] Shampoos and conditioners: Help to improve the texture of hair, and provide moisturizing and repair effects.

[0051] Facial mask: Used for deep cleansing and repairing the skin, providing additional nutrients.

[0052] Lip balm: Used for moisturizing and repairing dry lips, providing protection.

[0053] Perfume: Utilizing its unique fragrance to create a pleasant body scent experience.

[0054] The composition and proportion of the compound camellia seed essential oil of the present invention take into account multiple factors such as aromatic smell, massage application range, and acceptance degree of addition in cosmetics, showing its versatility and wide applicability in the cosmetics industry.

[0055] The compound camellia seed essential oil of the present invention is an innovative skin care product that integrates the advantages of multiple essential oils, having comprehensive skin care effects and a unique fragrance experience. It combines the unique effects of camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil, and volatile oil of Artemisia annua, such as deep moisturizing, effective anti - inflammation, promoting metabolism, fading skin spots, and stimulating hair growth. This compound essential oil is not only applicable to a variety of skin problems and types, including dry, oily, and sensitive skin, but also all its ingredients are derived from nature, ensuring high safety and a low risk of side effects. In addition to being an independent skin care product, this compound essential oil can also be incorporated as an additive into a variety of cosmetics, such as creams, lotions, serums, massage oils, shampoos, and conditioners, greatly enriching the efficacy of existing skin care products.

[0056] Furthermore, the compound camellia seed essential oil of the present invention performs excellently in antioxidant and anti - aging aspects. The tea polyphenols, vitamin E, and other aromatic compounds it contains work together to relieve skin aging and effectively reduce fine lines and wrinkles. The addition of lavender and rose essential oils not only enhances the fragrance experience of the product but also helps soothe tense emotions and improve mental state, having a positive effect on the psychological level. The addition of rosemary essential oil promotes hair growth and scalp health, while lavender and volatile oil of Artemisia annua effectively improve skin problems such as acne and dermatitis. In terms of environmental protection and sustainability, this compound essential oil with all - natural ingredients shows its commitment to being eco - friendly. Notably, the combination of volatile oil of Artemisia annua and camellia seed oil greatly enhances the natural barrier function of the skin and improves the resistance to external stimuli and environmental stress. In summary, through its carefully designed formula, the compound camellia seed essential oil of the present invention not only provides a comprehensive skin care solution but also brings mental comfort and relaxation, becoming a multi - functional and highly efficient skin care product.

[0057] In order to enhance the stability of the compound essential oil and protect its active ingredients from environmental factors such as oxidation and light, the present invention ingeniously processes it into the form of essential oil microcapsules. This microencapsulation can not only effectively control the gradual release of the essential oil components, prolong its action time, but also greatly improve the application safety and stability of the product in cosmetics. In addition, the use of microcapsules can significantly reduce the sensitive reactions that may occur when the skin directly contacts the essential oil, thereby optimizing the consumer's use experience and enhancing the market competitiveness of the product.

[0058] Preferably, a method for preparing compound camellia seed oil microcapsules comprises the following steps:

[0059] (1) Add hyaluronic acid, sodium caseinate, tannic acid, and succinaldehyde bis(dimethyl acetal) to water and stir to form a wall material solution;

[0060] (2) Add the emulsifier soy lecithin to the compound camellia seed oil and stir to obtain an oily liquid;

[0061] (3) Mix the wall material solution and the oily liquid;

[0062] (4) Homogenize;

[0063] (5) Spray dry;

[0064] (6) Sieve.

[0065] Preferably, a method for preparing compound camellia seed oil microcapsules comprises the following steps:

[0066] (1) Add 50 - 150 parts by weight of hyaluronic acid with a molecular weight of 200 - 600 kDa, 50 - 150 parts by weight of sodium caseinate, 14 - 20 parts by weight of tannic acid, and 2 - 6 parts by weight of succinaldehyde bis(dimethyl acetal) to 2000 - 4000 parts by weight of water, and stir at 65 - 75 °C and 200 - 400 rpm for 10 - 30 min to form a wall material solution;

[0067] (2) Add 1 - 4 parts by weight of the emulsifier soy lecithin to the 80 - 120 parts by weight of compound camellia seed oil, and stir at 50 - 60 °C and 100 - 200 rpm for 10 - 30 min to obtain an oily liquid;

[0068] (3) Mix the wall material solution and the oily liquid, and stir at 50 - 60 °C and 100 - 200 rpm for 30 - 90 min to obtain an emulsion;

[0069] (4) Emulsify and homogenize the emulsion at a pressure of 12 - 18 MPa and 1500 - 2500 rpm for 5 - 15 min to obtain a homogenized emulsion;

[0070] (5) Spray dry the homogenized emulsion on a fluidized bed;

[0071] (6) Pass through a 60 - 100 mesh sieve to obtain the composite camellia seed essential oil microcapsules.

[0072] Specifically, the specific functions of the above preparation steps are as follows:

[0073] (1) Preparation of the wall material solution:

[0074] Hyaluronic acid and sodium caseinate: These components together constitute the wall material of the microcapsules. Hyaluronic acid enhances the hydration ability and biocompatibility of the microcapsules, while sodium caseinate provides the necessary structural stability.

[0075] Tannic acid and succinaldehyde bis(dimethyl acetal): As cross - linkers, they help to form a more stable microcapsule wall material with a certain strength and integrity.

[0076] Water: As a solvent, it promotes the uniform distribution and cross - linking of the wall material components.

[0077] (2) Preparation of the oily solution:

[0078] Soybean lecithin: As an emulsifier, it helps to uniformly disperse the composite camellia seed essential oil in the water - based medium to form a stable emulsion.

[0079] (3) Preparation of the emulsion:

[0080] Mix the wall material solution with the oily solution so that the essential oil particles are wrapped by the wall material, preparing for the subsequent emulsification homogenization and drying processes.

[0081] (4) Emulsification homogenization:

[0082] This step reduces the size of the oil droplets through high - shear force, enhances the stability of the emulsion, and creates conditions for the formation of microcapsules.

[0083] (5) Spray drying:

[0084] Remove the liquid through rapid drying technology to form solid microcapsule powder.

[0085] (6) Sieving:

[0086] Obtain microcapsules with a consistent particle size through sieving to ensure the quality consistency of the product.

[0087] The composite camellia seed essential oil microcapsules prepared in the present invention have several remarkable advantages. First of all, its unique wall material combination, including hyaluronic acid and sodium caseinate, as well as effective cross-linking agents tannic acid and succinaldehyde bis(dimethyl acetal), provides the microcapsules with excellent structural stability and enhanced protective properties, thus achieving superior stable dispersion in aqueous media. These wall materials not only enhance the physical stability of the microcapsules but also improve their chemical stability, enabling better encapsulation and protection of the active ingredients of the core material, and prolonging the release time and shelf life of the active ingredients. In addition, soy lecithin acts as an emulsifier and plays a key role in the preparation of the oily liquid, ensuring the effective mixing and emulsification of the essential oil and the aqueous medium, and enhancing the solubility of the microcapsules. The steps of emulsification homogenization and spray drying further optimize the particle size distribution and morphology of the microcapsules, ensuring uniform and stable product quality. The precise control and optimization of the entire production process not only improve the overall quality of the microcapsules but also enhance their practicality in various application environments, making them have broad application prospects in the fields of food, cosmetics, and pharmaceuticals.

[0088] Example 1:

[0089] A composite camellia seed essential oil is composed of the following components in parts by weight: camellia seed oil 32 parts, rose essential oil 7 parts, lavender essential oil 5 parts, rosemary essential oil 2 parts, and artemisia annua volatile oil 0.2 part.

[0090] The preparation method of the above composite camellia seed essential oil includes the following steps:

[0091] (1) Accurately weigh the weight parts of each essential oil.

[0092] (2) First add camellia seed oil to the mixing container, and then successively add rose essential oil, lavender essential oil, rosemary essential oil, and artemisia annua volatile oil.

[0093] (3) At room temperature, gently and evenly stir the mixture using a magnetic stirrer.

[0094] (4) After stirring evenly, let the mixture stand at room temperature to ensure that all components are fully integrated.

[0095] ">(5) Storage: Transfer the prepared composite camellia seed essential oil to a dark glass bottle to avoid light and heat sources to maintain its stability and extend its shelf life.

[0096] The compound camellia seed essential oil in the present invention combines the multiple effects of camellia seed oil, rose essential oil, lavender essential oil, rosemary essential oil, and volatile oil of Artemisia annua, providing comprehensive support for skin care. Based on its fine molecular structure and rich natural antioxidant components (such as tea polyphenols and vitamin E), camellia seed oil deeply moisturizes the skin, promotes the metabolism of skin cells, and effectively delays the signs of aging, such as fine lines and wrinkles. The anti-inflammatory properties of the volatile oil of Artemisia annua and its ability to balance the skin microenvironment are particularly suitable for sensitive skin, enhancing the skin's natural barrier and improving the overall health of the skin. This unique compound essential oil is suitable for various skin types, with the effects of deep moisturization, anti-inflammation, and fading of age spots, and it can also promote hair growth. Its natural ingredients ensure the high safety of the product and the low risk of side effects, making it an ideal choice for various cosmetics.

[0097] Example 2:

[0098] A preparation method of compound camellia seed essential oil microcapsules includes the following steps:

[0099] Step 1: Add 100 parts by weight of hyaluronic acid with a molecular weight of 400 kDa, 100 parts by weight of sodium caseinate, 16 parts by weight of tannic acid, and 4 parts by weight of succinaldehyde bis(dimethyl acetal) to 3000 parts by weight of water, stir at 300 rpm for 20 min at 70 °C to form a wall material solution;

[0100] Step 2: Add 3 parts by weight of emulsifier soy lecithin to the 100 parts by weight of the compound camellia seed essential oil prepared in Example 1, stir at 150 rpm for 20 min at 55 °C to obtain an oily liquid;

[0101] Step 3: Mix the wall material solution with the oily liquid, stir at 150 rpm for 60 min at 55 °C to obtain an emulsion;

[0102] Step 4: Emulsify and homogenize the emulsion at 2000 rpm for 10 min under a pressure of 15 MPa to obtain a homogeneous emulsion;

[0103] Step 5: Spray-dry the homogeneous emulsion on a fluidized bed, with a spray rate of 20 ml / min, the inlet air temperature of the spray tower controlled at 75 °C, the outlet air temperature of 45 °C, and the fluidized bed temperature of 55 °C;

[0104] Step 6: Screen through a 80-mesh sieve to obtain the compound camellia seed essential oil microcapsules.

[0105] Comparative Example 1:

[0106] A preparation method of compound camellia seed essential oil microcapsules is different from that of Example 2 in the preparation method of the wall material solution in Step 1.

[0107] Step 1 specifically is: Add 200 parts by weight of hyaluronic acid with a molecular weight of 400 kDa, 16 parts by weight of tannic acid, and 4 parts by weight of succinaldehyde bis(dimethyl acetal) into 3000 parts by weight of water, and stir at 300 rpm for 20 min at 70 °C to form a wall material solution.

[0108] Comparative Example 2:

[0109] A preparation method of a composite camellia seed essential oil microcapsule, which is different from Example 2 in the preparation method of the wall material solution in Step 1.

[0110] Step 1 specifically is: Add 200 parts by weight of sodium caseinate, 16 parts by weight of tannic acid, and 4 parts by weight of succinaldehyde bis(dimethyl acetal) into 3000 parts by weight of water, and stir at 300 rpm for 20 min at 70 °C to form a wall material solution.

[0111] Comparative Example 3:

[0112] A preparation method of a composite camellia seed essential oil microcapsule, which is different from Example 2 in the preparation method of the wall material solution in Step 1.

[0113] Step 1 specifically is: Add 100 parts by weight of hyaluronic acid with a molecular weight of 400 kDa, 100 parts by weight of sodium caseinate, and 20 parts by weight of tannic acid into 3000 parts by weight of water, and stir at 300 rpm for 20 min at 70 °C to form a wall material solution.

[0114] Comparative Example 4:

[0115] A preparation method of a composite camellia seed essential oil microcapsule, which is different from Example 2 in the preparation method of the wall material solution in Step 1.

[0116] Step 1 specifically is: Add 100 parts by weight of hyaluronic acid with a molecular weight of 400 kDa, 100 parts by weight of sodium caseinate, and 20 parts by weight of succinaldehyde bis(dimethyl acetal) into 3000 parts by weight of water, and stir at 300 rpm for 20 min at 70 °C to form a wall material solution.

[0117] Comparative Example 5:

[0118] A preparation method of a composite camellia seed essential oil microcapsule, which is different from Example 2 in the preparation method of the wall material solution in Step 1.

[0119] Step 1 specifically is: Add 100 parts by weight of hyaluronic acid with a molecular weight of 400 kDa, 100 parts by weight of sodium caseinate, and 20 parts by weight of glutaraldehyde into 3000 parts by weight of water, and stir at 300 rpm for 20 min at 70 °C to form a wall material solution.

[0120] Comparative Example 6:

[0121] A preparation method of a composite camellia seed essential oil microcapsule, which is different from that of Example 2 in the preparation method of the wall material solution in Step 1.

[0122] Step 1 is specifically as follows: Add 100 parts by weight of hyaluronic acid with a molecular weight of 400 kDa, 100 parts by weight of sodium caseinate, 16 parts by weight of tannic acid, and 4 parts by weight of glutaraldehyde to 3000 parts by weight of water, and stir at 300 rpm at 70 °C for 20 min to form a wall material solution.

[0123] Test Example 1:

[0124] Dissolve the essential oil microcapsules in pure water at 37 °C at a concentration of 3 wt% and stir at 50 r / min. Observe once every 1 minute to see if it can dissolve to form an emulsion. Record the dissolution time X (minutes). The shorter the dissolution time, the better the solubility of the microcapsules.

[0125] After complete dissolution, start to stand at room temperature and observe once every 10 minutes. Record the time Y (minutes) when stratification occurs. The longer the stratification time, the better the stability of the essential oil microcapsules.

[0126]

[0127]

[0128] In the present invention, the effects of different wall material components on the solubility and stability of the microcapsules were compared. In Comparative Example 1, a single hyaluronic acid was used as the wall material. This configuration showed good dissolution performance, but its stability was poor, manifested as being prone to stratification. While in Comparative Example 2, a single sodium caseinate was selected as the wall material, and the result showed a longer stratification time, thus indicating better stability, but its solubility was relatively weak. In Example 2 of the present invention, a composite of hyaluronic acid and sodium caseinate was used as the wall material, successfully achieving an effective balance between solubility and stability. This finding provides an important theoretical basis for the design and application of microcapsules, especially in application scenarios where both solubility and stability need to be considered comprehensively.

[0129] In the present invention, the compounding of hyaluronic acid and sodium caseinate was determined as the wall material composition of the microcapsules. For the selection of the crosslinking agent, in Comparative Example 3, only a single tannic acid was used, while in Comparative Example 4, succinaldehyde bis(dimethyl acetal) was used alone. In contrast, Example 2 of the present invention combined tannic acid and succinaldehyde bis(dimethyl acetal) as a composite crosslinking agent. The results showed that Example 2 achieved significant improvements in both solubility and stability. This finding highlights the advantages of using a composite crosslinking agent in the design of microcapsule wall materials, especially in application fields that pursue high solubility and stability.

[0130] In the present invention, the combination of tannic acid and succinaldehyde bis(dimethyl acetal) acts as a crosslinking agent and plays a key role in the crosslinking process of the microcapsule wall material. Tannic acid, as a polyphenolic compound of natural origin, can form strong hydrogen bonds and electrostatic interactions with protein molecules in the wall material, improving the mechanical stability and structural integrity of the microcapsules. Succinaldehyde bis(dimethyl acetal), as an aldehyde compound with a unique structure, enhances the crosslinking density and chemical stability of the wall material through covalent crosslinking with the amino acid side chains in the wall material. This dual crosslinking mechanism not only enhances the structural stability of the microcapsules but also maintains appropriate flexibility and water permeability, thus effectively improving the solubility of the microcapsules. Therefore, the combined use of tannic acid and succinaldehyde bis(dimethyl acetal) exhibits a significant synergistic effect in enhancing the stability and solubility of the microcapsules.

[0131] The comparative analysis between Comparative Example 4 and Comparative Example 5 reveals the influence of different crosslinking agents on the performance of the microcapsules. In Comparative Example 4, the crosslinking agent used is succinaldehyde bis(dimethyl acetal), while in Comparative Example 5, glutaraldehyde is used as the crosslinking agent. The research results show that the microcapsules using succinaldehyde bis(dimethyl acetal) as the crosslinking agent exhibit significant advantages in terms of solubility and stability compared to the microcapsules crosslinked with glutaraldehyde. Due to its special chemical structure, succinaldehyde bis(dimethyl acetal) forms a more effective crosslinking network in the microcapsule wall material composed of the complex of hyaluronic acid and sodium caseinate. This not only enhances the structural integrity of the microcapsules but also improves their stability and solubility in the aqueous environment. Therefore, the choice of succinaldehyde bis(dimethyl acetal) as the crosslinking agent shows its obvious superiority in enhancing the overall performance of the microcapsules.

[0132] In summary, in the present invention, the good solubility and stability of the composite camellia seed oil microcapsules are achieved through a series of carefully designed preparation steps. First, the preparation of the wall material solution involves the use of hyaluronic acid and sodium caseinate, which provide the necessary elasticity and flexibility for the microcapsules to be stably dispersed in the aqueous environment. Tannic acid and succinaldehyde bis(dimethyl acetal) as crosslinking agents enhance the structural integrity of the wall material, thereby improving the stability of the microcapsules. In the preparation stage of the oily liquid, soy lecithin as an emulsifier effectively emulsifies the composite camellia seed oil, improving the compatibility between the essential oil and the wall material, and thus enhancing the solubility of the final microcapsules. Next, during the emulsification and homogenization process, the high shear force reduces the size of the oil droplets, forming a stable emulsion and ensuring the uniform dispersion of the essential oil particles. Finally, the spray drying technology forms a uniform solid microcapsule powder through rapid drying, and the precise control of the particle size and uniform drying further improve the solubility and stability of the microcapsules.

Claims

1. A preparation method of a composite camellia seed essential oil microcapsule, characterized in that, It includes the following steps: (1) Add hyaluronic acid, sodium caseinate, tannic acid, and succinaldehyde bis(dimethyl acetal) into water and stir to form a wall material solution; (2) Add emulsifier soy lecithin into the compound camellia seed essential oil and stir to obtain an oily solution; (3) Mix the wall material solution with the oily solution; (4) Homogenize; (5) Spray dry; (6) Screen; The compound camellia seed essential oil is composed of the following components in parts by weight: 20-40 parts of camellia seed oil, 2-12 parts of rose essential oil, 2-10 parts of lavender essential oil, 1-8 parts of rosemary essential oil, and 0.05-0.9 part of artemisia annua volatile oil.

2. The preparation method of the composite camellia seed essential oil microcapsule according to claim 1, wherein, It includes the following steps: (1) Add 50-150 parts by weight of hyaluronic acid with a molecular weight of 200-600 kDa, 50-150 parts by weight of sodium caseinate, 14-20 parts by weight of tannic acid, and 2-6 parts by weight of succinaldehyde bis(dimethyl acetal) into 2000-4000 parts by weight of water, and stir at 200-400 rpm for 10-30 min at 65-75 °C to form a wall material solution; (2) Add 1-4 parts by weight of emulsifier soy lecithin into 80-120 parts by weight of the compound camellia seed essential oil, and stir at 100-200 rpm for 10-30 min at 50-60 °C to obtain an oily solution; (3) Mix the wall material solution with the oily solution, and stir at 100-200 rpm for 30-90 min at 50-60 °C to obtain an emulsion; (4) Emulsify and homogenize the emulsion at 1500-2500 rpm for 5-15 min under a pressure of 12-18 MPa to obtain a homogeneous emulsion; (5) Spray dry the homogeneous emulsion on a fluidized bed; (6) Screen through a 60-100 mesh sieve to obtain the compound camellia seed essential oil microcapsules; The compound camellia seed essential oil is composed of the following components in parts by weight: 20-40 parts of camellia seed oil, 2-12 parts of rose essential oil, 2-10 parts of lavender essential oil, 1-8 parts of rosemary essential oil, and 0.05-0.9 part of artemisia annua volatile oil.

3. The preparation method of the composite camellia seed essential oil microcapsule according to claim 2, characterized in that, The compound camellia seed essential oil is composed of the following components in parts by weight: 25-35 parts of camellia seed oil, 4-10 parts of rose essential oil, 3-8 parts of lavender essential oil, 1-5 parts of rosemary essential oil, and 0.1-0.5 part of artemisia annua volatile oil.

4. The preparation method of the composite camellia seed essential oil microcapsule according to claim 2, characterized in that, The compound camellia seed essential oil is composed of the following components in parts by weight: 32 parts of camellia seed oil, 7 parts of rose essential oil, 5 parts of lavender essential oil, 2 parts of rosemary essential oil, and 0.2 part of artemisia annua volatile oil.

5. A composite camellia seed essential oil microcapsule, characterized in that, It is prepared by the method according to any one of claims 1-4.

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