WO2016140636A1

WO2016140636A1 - Technique of soap production by encapsulation of natural aromatic oil

Info

Publication number: WO2016140636A1
Application number: PCT/TR2016/050051
Authority: WO
Inventors: Sadiye CETIN
Original assignee: Santek Medikal Urunleri Danismanlik Yazilim Donanim Ve Bilgisayar Hizmetleri San. Tic. Ith. Ihr. Ltd. Sti.
Priority date: 2015-03-03
Filing date: 2016-03-02
Publication date: 2016-09-09
Also published as: WO2016140636A4

Abstract

The invention is that solving at least one carrier agent into water, following, preparing a mixture with at least one aromatic oil and adding at least one emulsifier agent during mixing, and homogenizing the formed emulsion and putting it into spray drier process and by this way obtaining the soap containing aromatic oil capsules.

Description

DESCRIPTION

TECHNIQUE OF SOAP PRODUCTION BY ENCAPSULATION OF NATURAL

AROMATIC OIL

TECHNICAL FIELD

The invention is production of soap by encapsulation technique using spray drier method in order to obtain maximum protection for volatile oils enriched with natural and local oils. The system is optimized with response surface methodology.

PREVIOUS TECHNIQUE

Encapsulation; is defined as coating or enclosing of a substance or mixture with another substance or system. Microencapsulation is technology used for obtaining capsules (microcapsule) having dimension between micrometer and millimeter as surrounding the periphery of an active substance (core) with one or more coating substances (wall) with the purpose of preparing micro spheres.

Microcapsules are simply in sphere form and a homogeneous wall is present around it. Substance or mixture core inside the microcapsule is stated as inner phase or filling; the wall in outer part is named as shell, coating, wall material or membrane. Encapsulation technology is nowadays used in many varied sectors like pharmacology, chemistry, cosmetic, nourishment or paint.

EP04703414.5 numbered invention is related to microencapsulation systems; the features of systems are to prepare with reference to fatty substances and sugar and substantially to create a regulated whole, equaled to crystal structure batch. The invention is related to microencapsulation application of a substance especially used as active therapeutic or in cosmetic. In the invention, manufacturing method needs custom manufacturing equipment like turbines, homogenizer and specific driers.

CN20131 1571 12 numbered invention is a kind of handmade cold processing soap and is the method of preparing this soap. Handmade cold processing soap includes a capsule wall and encapsulated particles 1 -2 % in weight inside itself. Basic formula of the handmade cold processing soap is, 5-20 portion avocado oil, 5-20 portion coconut oil, 5- 20 portion olive oil, 5-20 portion palm oil, 5-20 portion, 5-20 portion shea oil, 5-15 portion sodium hydroxide and 10-35 portion water. l In compliance with handmade cold processing soap, function complement or perfume or other materials are packed in the microcapsule, such that; effective solutions for easy deterioration of handmade cold processing soap and evaporation of nutritious, perfume and other materials and simple failure problems; by direct contact of function complement, perfume and other materials, and so alkaline level of handmade cold processing soap can be avoided.

On the other hand, as a result of investigating present soap productions, products including natural aromatic volatile oil were observed to be not sufficient on the market. Major part of oils is chemical/synthetic products and has potential harm to consumer from medical point of view. These products do not meet the consumer's natural product requirement.

When soap production sector is evaluated throughout our country, major part of used aromatic oils is observed to be imported. This condition causes increase in Turkey's import cost. Our country is very rich from the point of medical and aromatic herbs and by this invention, it was aimed to reduce import inputs and it will be a reducer for current deficit.

With present techniques, adding used oils into soap directly is most frequently applied technique. As far as it is known, spray drier technique and encapsulation method are not a technique used in soap production. As an object of invention, a soap, which was freed from chemical ingredients, is developed using aromatic volatile oils with soap production method and it meets the consumer's natural product requirements.

Natural aromatic volatile oils do not show expected essential effect in soap if they are not directly used. In our project, the usage of spray drier and encapsulated volatile oil includes an important innovation in soap production.

EXPLANATION OF THE INVENTION

Many different methods are used in encapsulation procedure. During the choice of microencapsulation method, there is significant importance in physical and chemical features of core and coating materials and also the field that the compound will be used. In the invention, spray drier method is used as encapsulation technique. Spray drier method is one of the oldest methods used in encapsulation by coating core compounds (oils, aroma materials etc) and transforming liquid materials into dust form.

In spray drier method, liquid material is given into hot air environment in form of small drops with the help of atomizer. The water in the structure moves away from the material in a short period due to evaporation speed. Despite high drier temperature, the material does not get harm due to short drying process and theoretically not exceeding wet bulb temperature.

There are four basic stages present in microencapsulation process with spray drier method. These are stages of dispersion or emulsion preparation, homogenization of dispersion, atomization and drying.

Soap production method, which is the subject of the invention, includes the stages of emulsion preparation, homogenization of emulsion, drying emulsions with spray drier method and soap production method.

Explanation of Figures Figure.1 : 10000 x zoomed scanned electron microscope images of microcapsulated lavender oil

Figure.2: 6000 x zoomed scanned electron microscope images of microcapsulated lavender oil

Figure.3: 10000 x zoomed scanned electron microscope images of microcapsulatedlemon peel oil

Figure.4: 2550 x zoomed scanned electron microscope images of microcapsulated lemon peel oil

Soap production with encapsulation of natural aromatic oils, which is the subject of the invention, basically actualizes in two stages. Firstly, microcapsules, which will be used in soap, are formed. For that, preparation of emulsion and drying process of emulsions with spray drier method are performed. After making microcapsules ready, soap production and optimization process steps are carried out.

Preparation Method of Emulsion Firstly the emulsion that will form the core of microcapsules is prepared in order to form microcapsules taking part inside the soap. The emulsion that will form the core is provided to be solved in lavender oil, lemon peel oil, emulgator-gum arabic and maltodextrindeionized water, which is seen in Table.1 . After performed literature search, lower and upper limits of compounds in the emulsion mixture, that is used in the study, are specified in the table below, Table.1 .

Table 1 . Emulsion compounds lower and upper limits.

For that, maltodextrin between the range of 10-20 gr, emulgator-gum arabic between the range of 0.5-2 gram, lavender oil between the range of 5-15 gram, lemon peel oil between the range of 70-80 gram are solved in deionized water. In encapsulation process, arabic gum as emulsifier agent and maltodextrin as carrier agent are used in order to obtain/increase stabilization of emulsion.

After preparing emulsion, there homogenizing stages in order to form more stable emulsion. In classic homogenization; homogenization speed was specified as 15000- 20000 rpm, homogenization time was specified as 5-10 min. and homogenization temperature was specified as 25 °C and they were all kept stable in all tests. While homogenization conditions were determined, least effected emulsion features from homogenization process were taken into consideration. Therefore, shorter procedure time at high homogenization speed was carried out. Also, for not effecting from hot, emulsion temperature was taken care of not to exceed 25 °C. At the beginning of study, the oils that will be used for planned encapsulation studies were determined as "lavender and lemon oil". Also, the usage of other inputs needed for microencapsulation process is like that: arabic gum as emulsifier agent was used in order to obtain/increase stabilization of emulsion. Maltodextrin was determined as carrier agent.

Drying Emulsions with Spray Drier Method Encapsulation of prepared emulsions is carried out in a mini spray drier. Drier tank height is 1 10 mm and diameter is 50 mm. In the study, nozzle 0.7 mm in diameter was used. Spray drier process conditions were determined from literature so as air input temperature to be between 1 10-140 °C. Considering the results, the most convenient pump speed range was selected as 10%-30%. Also, air flow rate and aspiration rate, which are the characteristic of used spray drier, directly influence the features of the product. Suitable air flow rate was determined as 400-500 1/h and aspiration rate was determined as 20-30 m3/h and they were kept stable during all tests.

As is seen in Figure.1 and Figure.2, microcapsulated lavender oil and lemon peel oil were capsulated and approximate dimensions are at around 10-20 μηι. Soap Production and Optimization

Amounts of materials used during soap production are represented in the table below, Table.2.

Distilled water, caustic soda, lavender and lemon peel oil amounts are weighed in accordance with the prescription. Caustic soda is slowly added into distilled water. During that, temperature increase occurs, because of that a metallic or non-soluble plastic container is used. After adding 5-10% caustic in 40-50% water as specified in the prescription, top of the container is closed in order to slow down the vaporization and the temperature is waited for reducing. After caustic soda temperature reduces, 40-50% oil is added at 500 g/min as specified in the prescription. In the meanwhile, mixing at 800-1250 rpm speed occurs. Mixing speed of the mixture, which was mixed at 800-1250 rpm for 10- 30 min, is reduced. Homogenized and encapsulated aromatic oil capsules including essence are added into the mixture, which is mixed at low speed for 10-30 minutes. While micro spheres are added, it is stirred with a plastic or wooden spoon. Meanwhile, pH control and measurement are performed. The mixture, which is waited for 5 minutes, is poured into containers. The soaps are waited between 24-48 hours at ambient temperature and closed area and they are removed. They are waited for 3 weeks with this status and then soaps are obtained.

DETAILED EXPLANATION OF THE INVENTION

The invention is that solving at least one carrier agent into water, following preparing a mixture with at least one aromatic oil and adding at least one emulsifier agent during mixing, and homogenizing the formed emulsion and putting it into spray drier process and by this way obtaining the soap containing aromatic oil capsules.

It is characterized with maltodextrin as mentioned carrier material, lavender oil, lemon peel oil as mentioned aromatic oils and gum arabic as mentioned emulsifier agent.

As aromatic oil, lavender oil in the range of 5-15 gram, lemon peel oil in the range of 70- 80 gram.

Mentioned emulsifier agent is emulgator-gum arabic in the range of 0.5-2 gram, carrier agent is maltodextrin in the range of 10-20 gram and deionized water is in the range of 70- 80 gram.

Emulsion; is composed of solving carrier material, in other words, maltodextrin in deionized water, following preparing mixture with lavender oil, lemon peel oil and during mixing this mixture, adding arabic gum as emulgator and maltodextrin as carrier material.

Shorter process time at high homogenization speed was carried out for least effected emulsion features from homogenization process.

Homogenization temperature should not exceed 25 °C for not to affect emulsions from hot.

Dimensions of microcapsulated lavender oil and lemon peel oil micro spheres are approximately at around 10-20 μηι.

Production method of soap including microcapsules: is composed of adding 5-10% caustic soda into 40-50% distilled water, closing top of the container in order to slow down the vaporization and after the temperature reduces, adding 40-50% oil, in the meanwhile, mixing at 800-1250 rpm speed and reducing mixing speed and continuing mixing for 10- 30 min and reducing the mixing speed and mixing for 10-30 minute at slow speed and adding % 0.5-4 essential homogenized encapsulated aromatic oil capsules. The mixture, which is waited for 5 minutes, is poured into containers. The soaps are waited between 24-48 hours at ambient temperature in a closed area and they are removed. They are waited for 3 weeks with this status and then soaps are obtained.

Claims

1. The invention is a soap containing microcapsules, the feature is; solving at least one carrier agent into deionized water, following preparing a mixture with at least one aromatic oil and adding at least one emulsifier agent during mixing, and homogenizing the formed emulsion and putting it into spray drier process and by this way, the soap is characterized with containing aromatic oil capsules.

2. The invention, according to claim 1 , is a soap containing microcapsules, the feature is; characterized with at least one mentioned aromatic oils, such as lavender oil and lemon peel oil.

3. The invention, according to claim 1 , is a soap containing microcapsules, the feature is; characterized with maltodextrin as carrier material.

4. The invention, according to claim 1 , is a soap containing microcapsules, the feature is; characterized with gum arabic as mentioned emulsifier agent.

5. The invention, according to claim 1 , is a soap containing microcapsules, the feature is; characterized with lavender oil in the range of 5-15 gram, lemon peel oil in the range of 70-80 gram, gum arabic in the range of 0.5-2 gram, maltodextrin in the range of 10- 20 gram and deionized water in the range of 70-80 gram.

6. The invention, according to claim 1 , is a soap containing microcapsules, the feature is; characterized with shorter process time at high homogenization speed for least effected emulsion features from homogenization process.

7. The invention, according to claim 1 , is a soap containing microcapsules, the feature is; characterized with homogenization temperature not exceeding 25 °C for not to affect emulsions from hot.

8. The invention, according to claim 1 , is a soap containing microcapsules, the feature is; characterized with putting into spray drier so as microcapsule dimensions of oils to be approximately 10-20 μηι.

9. The invention is a soap production method containing microcapsules, the feature is characterized with the steps of; - adding 5-10% caustic soda into 40-50% distilled water slowly ,

in top of the container in order to slow down the vaporization and waiting for temperature to reduce,

- after the temperature reduces, adding 40-50% oil,

- in the meanwhile, mixing at 800-1250 rpm speed for 10-30 min and reducing mixing speed, mixing for more 10-30 minute at slow speed,

- adding % 0.5-4 essential homogenized encapsulated aromatic oil capsules into the mixture .

10. The invention is a soap production method containing microcapsules, the feature is characterized with the process step of; making obtained mixture waited approximately for 5 minutes and then pouring into containers, and making them waited between 24- 48 hours at ambient temperature in a closed area and removing the soaps from containers.