阅读说明：本技术 一种用于头发护理的纤维素纳米晶须稳定Pickering乳液的制备及应用 (Preparation and application of cellulose nanowhisker stable Pickering emulsion for hair care ) 是由 徐峻 周子泳 王斌 高文花 李军 曾劲松 陈克复 于 2020-12-04 设计创作，主要内容包括：本发明公开了一种用于头发护理的纤维素纳米晶须稳定Pickering乳液制备及应用。所述方法包括以下步骤：将阳离子表面活性剂加入到CNC悬浮液中,加入水,在控温条件下进行超声波处理,制得阳离子改性的CNC悬浮液；将阳离子改性CNC悬浮液与有机硅油混合,进行乳化,得到纤维素纳米晶须稳定Pickering乳液。本发明采用阳离子表面活性剂对纤维素纳米晶须进行改性,提高其乳化有机硅油能力,制备稳定的Pickering乳液并应用于头发护理产品中,能减轻传统表面活性剂的使用对环境和人体的危害,并且在开发绿色日化产品方面具有较大的经济效益。(The invention discloses preparation and application of a stable Pickering emulsion of cellulose nanowhiskers for hair care. The method comprises the following steps: adding a cationic surfactant into the CNC suspension, adding water, and performing ultrasonic treatment under the condition of temperature control to prepare a cationic modified CNC suspension; and mixing the cation modified CNC suspension with organic silicone oil, and emulsifying to obtain the cellulose nanowhisker stable Pickering emulsion. According to the invention, the cationic surfactant is adopted to modify the cellulose nano-whisker, so that the capability of emulsifying the organic silicone oil is improved, the stable Pickering emulsion is prepared and applied to hair care products, the harm of the use of the traditional surfactant to the environment and human body can be reduced, and the invention has great economic benefit in the aspect of developing green daily chemical products.)

1. A preparation method of a cellulose nanowhisker stable Pickering emulsion for hair care is characterized by comprising the following steps:

(1) adding a cationic surfactant into the CNC suspension, adding water, and performing ultrasonic treatment under the condition of temperature control to prepare a cationic modified CNC suspension;

(2) and (2) mixing the cation modified CNC suspension prepared in the step (1) with organic silicone oil, and emulsifying to obtain the cellulose nanowhisker stable Pickering emulsion.

2. The method for preparing the cellulose nanowhisker-stabilized Pickering emulsion for hair care according to claim 1, wherein in the step (1), the cationic surfactant is at least one of cetyltrimethylammonium chloride and octadecyltrimethylammonium chloride.

3. The preparation method of the cellulose nanowhisker stable Pickering emulsion for hair care according to claim 1, wherein in the step (1), the temperature of the ultrasonic treatment is controlled to be 10-40 ℃, the specific energy input is 10-1000J/g, and the ultrasonic treatment time is 1-10 min.

4. The preparation method of the cellulose nanowhisker stable Pickering emulsion for hair care according to claim 1, wherein in the step (1), the mass fraction of the cationic surfactant in the cation-modified CNC suspension is 0.01-1%; the mass fraction of CNC in the cation modified CNC suspension was 0.45%.

5. The method for preparing the cellulose nanowhisker-stabilized Pickering emulsion for hair care according to claim 1, wherein in the step (2), the silicone oil is polydimethylsiloxane and has a viscosity of 10 to 1000 mPa.s.

6. The preparation method of the cellulose nanowhisker stable Pickering emulsion for hair care according to claim 1, wherein in the step (2), the mass fraction of the silicone oil in the cellulose nanowhisker stable Pickering emulsion is 0.5-10%; the mass fraction of the cationic modified CNC suspension in the cellulose nano whisker stabilized Pickering emulsion is 60-90%.

7. The preparation method of the cellulose nanowhisker-stabilized Pickering emulsion for hair care according to claim 1, wherein in the step (2), the emulsification is high-speed dispersion or ultrasonic treatment; the rotating speed of the high-speed dispersion machine is 3000-20000 r/min, and the high-speed dispersion time is 1-5 min; the ultrasonic treatment temperature is controlled to be 10-40 ℃, the specific energy input is 50-500J/g, the ultrasonic working/pause time is 3s/2s, and the ultrasonic treatment time is 1-10 min.

8. A modified cellulose nanowhisker stable Pickering emulsion prepared by the method of any one of claims 1 to 7.

9. Use of the modified cellulose nanowhisker stable Pickering emulsion of claim 8 in hair care.

10. A hair care product comprising the modified cellulose nanowhisker stable Pickering emulsion of claim 8.

Technical Field

The invention belongs to the field of hair care, and particularly relates to a preparation method and application of a stable Pickering emulsion of cellulose nanowhiskers for hair care.

Background

Hair washing and caring products become necessities of modern people. In general, the surface of the head has negative charges, which makes the hair difficult to comb. It is therefore desirable to add cationic surfactants to hair care and wash products. After the hair washing and caring product is used, the cationic surfactant is adsorbed on the surface of hair, and neutralizes the negative charge on the surface of hair, thereby improving the combing property of hair. Because of the water-insoluble property of the organic silicone oil, the silicone oil can form a layer of film on the surface of hair in the washing process, thereby improving the combing property of the hair and increasing the glossiness and the softness of the hair. The hair washing and caring emulsion products on the market are mainly used by matching a cationic surfactant and organic silicone oil, so that the combing property of the washed hair is improved. When the organic silicon oil is used as an oil phase in the existing hair washing and protecting emulsion formula, a large amount of traditional emulsifier is required to be added for emulsifying the organic silicon oil, so that the emulsion is kept stable for a long time.

Because the traditional emulsion is a thermodynamically unstable system, emulsion coagulation easily occurs under the influence of heat or gravity, resulting in phase separation. Pickering emulsion is an emulsion stabilized by solid particles instead of traditional surfactants. Compared with the traditional emulsion, the Pickering emulsion can form stable emulsion under the condition of lower solid particle dosage, and can reduce the low toxicity and irritation of the traditional surfactant to human bodies. With the change of the consumption demand of people, the product demand of the market on green environment-friendly labels is continuously increased, and the Pickering emulsion with stable bio-based solid particles is gradually concerned by people. The cellulose nanowhisker has the characteristics of high specific surface area, high hydrophilicity, reproducibility, biodegradability and the like, is applied to Pickering emulsion, meets the green and environment-friendly requirements of people on products, and effectively reduces the harm of the use of the traditional surfactant to the environment. The surface property of the cellulose nanowhisker is changed by modifying the surface of the cellulose nanowhisker, which is beneficial to expanding the application range of the cellulose nanowhisker in Pickering emulsion.

Patent CN106750375 discloses a method for preparing Pickering emulsion by using modified nanocellulose, which is to disperse amphiphilic front-end copolymer modified nanocellulose as solid particle emulsifier in water, mix with oily solvent, and form stable Pickering emulsion through emulsification operation. However, the method requires that an amphiphilic front-end copolymer is synthesized by a RAFT polymerization method, and then the amphiphilic front-end copolymer is grafted and modified with nanocellulose to be applied to Pickering emulsion, the steps are complex, and the obtained Pickering emulsion is not applied to hair care.

Disclosure of Invention

In order to solve the problem that the efficiency of emulsifying organic silicone oil is low when the cellulose nanowhiskers are used for preparing Pickering emulsion in the prior art, the invention mainly aims to provide a preparation method of stable Pickering emulsion of cellulose nanowhiskers for hair care. According to the method, the cationic surfactant is used as a modifier, so that the cellulose nanowhiskers with negative charges on the surface are modified by attraction of opposite charges at room temperature, the modified cellulose nanowhiskers are used for stabilizing Pickering emulsion, and the efficiency of the cellulose nanowhisker emulsified silicone oil is improved.

The invention also aims to provide application of the stable Pickering emulsion of the cellulose nanowhiskers obtained by the method.

The invention also provides a hair care product.

The purpose of the invention is realized by the following technical scheme:

a preparation method of a cellulose nanowhisker stable Pickering emulsion for hair care comprises the following steps:

(1) adding a cationic surfactant into the CNC (cellulose nanowhisker) suspension, adding water, and carrying out ultrasonic treatment under the temperature control condition to prepare a cationic modified CNC suspension;

(2) and (2) mixing the cation modified CNC suspension prepared in the step (1) with organic silicone oil, and emulsifying to obtain the cellulose nanowhisker stable Pickering emulsion.

Preferably, in the step (1), the CNC suspension concentration is 0.5 wt% to 1.0 wt%.

Preferably, in the step (1), the cationic surfactant is at least one of cetyltrimethylammonium chloride (CTAC) and octadecyltrimethylammonium chloride (octadecyl trimethyl ammonium chloride).

Preferably, in the step (1), the temperature of the ultrasonic treatment is controlled to be 10-40 ℃, the specific energy input is 10-1000J/g, and the ultrasonic treatment time is 1-10 min.

Preferably, in step (1), the mass fraction of CNC in the cation-modified CNC suspension is 0.45%.

Preferably, in the step (1), the mass fraction of the cationic surfactant in the cation-modified CNC suspension is 0.01-1%.

Preferably, in the step (2), the organic silicone oil is polydimethylsiloxane, and the viscosity is 10-1000 mPa.s.

Preferably, in the step (2), the mass fraction of the organic silicone oil in the cellulose nanowhisker stable Pickering emulsion is 0.5-10%; the mass fraction of the cation-modified CNC suspension in the cellulose nanowhisker stable Pickering emulsion is 60-90%, namely the mass fraction of the cation-modified CNC (cellulose nanowhisker) is 0.25-1.5%.

In the preparation method, if the organic silicon oil and the cation modified CNC suspension are mixed, the mass fraction of the cation modified cellulose nano crystal whiskers is not in the range of 0.25-1.5%, and the mass fraction of the organic silicon oil is not in the range of 0.5-10%, and water can be added for regulation and then emulsification is carried out.

Preferably, in the step (2), the emulsification refers to emulsification by a high-speed dispersion or ultrasonic treatment method; the rotating speed of the high-speed dispersion machine is 3000-20000 r/min, and the high-speed dispersion time is 1-5 min; the ultrasonic treatment temperature is controlled to be 10-40 ℃, the specific energy input is 50-500J/g, the ultrasonic working/pause time is 3s/2s, and the ultrasonic treatment time is 1-10 min.

Preferably, in the step (2), the average particle size of the prepared modified cellulose nanowhisker stable Pickering emulsion is 0.5-30 μm.

The invention also provides the modified cellulose nano whisker stable Pickering emulsion prepared by the method. The emulsion can be used for hair care.

The invention also provides a hair care product which comprises the modified cellulose nanowhisker stable Pickering emulsion.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the method has the advantages of simple process, environmental protection, and capability of improving the capability of emulsifying the organic silicone oil by modifying the cellulose nanowhisker with the cationic surfactant only at room temperature, and the organic silicone oil can be efficiently emulsified when the addition amount of the emulsifier is low to prepare the Pickering emulsion.

The Pickering emulsion prepared by the invention is applied to hair washing and caring emulsion products, can improve hair combing property, simultaneously can reduce environmental problems caused by using a large amount of traditional emulsifying agent to emulsify organic silicone oil, reduces low toxicity and irritation of the hair washing and caring emulsion products to human bodies, and has great economic benefit in developing green daily chemical products.

Drawings

Figure 1 is a photomicrograph of a cellulose nanowhisker stable Pickering emulsion prepared in comparative example 1.

Figure 2 is a photomicrograph of a CTAC-stabilized emulsion prepared in comparative example 2.

Figure 3 is a micrograph of a modified cellulose nanowhisker stable Pickering emulsion prepared in example 1.

Figure 4 is a micrograph of a modified cellulose nanowhisker stable Pickering emulsion prepared in example 2.

Figure 5 is a micrograph of a modified cellulose nanowhisker stable Pickering emulsion prepared in example 3.

Figure 6 is a micrograph of a modified cellulose nanowhisker stable Pickering emulsion prepared in example 4.

Figure 7 is a graph of the particle size distribution of the modified cellulose nanowhisker stable Pickering emulsions prepared in examples 1, 2, 3, 4 and the CTAC stable emulsion of comparative example 2.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto. The raw materials related to the invention can be directly purchased from the market. For process parameters not specifically noted, reference may be made to conventional techniques.

Comparative example 1

(1) Preparation of Pickering emulsion

Adding 0.5g of CNC powder into a clean beaker filled with 99.5g of deionized water, treating for 3min by using a high-speed dispersion machine 16000r/min, placing the uniformly stirred cellulose nanowhisker suspension into an ice water bath, placing the mixture into an ultrasonic cell disruption instrument, and carrying out ultrasonic treatment for 5min, controlling the temperature to be 40 ℃, and inputting the specific energy to be 40J/g to prepare the CNC suspension with the concentration of 0.5 wt%.

Adding 9g of CNC suspension and deionized water into a 25ml dry clean beaker according to the mass ratio of CTAC to the mixed solution of 0% and the mass ratio of cellulose nano-whisker to the mixed solution of 0.45%, wherein the total mass of the mixed solution is 10 g.

And then taking a 25ml clean beaker, adding 6g of the mixed solution into the beaker according to the mass ratio of the cellulose nano whiskers being 0.405%, then adding 1g of polydimethylsiloxane into the beaker according to the mass ratio of the polydimethylsiloxane being 10%, then adding deionized water to make the total mass of the system be 10g, and treating for 1min by using a high-speed dispersion machine 17000 r/min. And (3) placing the beaker in an ice water bath, placing the beaker in an ultrasonic cell disruption instrument, controlling the temperature to be 40 ℃, inputting the specific energy to be 65J/g, and carrying out ultrasonic treatment for 90s (3s work and 2s pause) to prepare the modified cellulose nano whisker Pickering emulsion.

(2) Performance testing

The Pickering emulsion was allowed to stand for 24 hours and observed with a microscope, and the results are shown in FIG. 1. 2ml of the emulsion was applied to the hair, massaged and rinsed, and then tested with a hair tester. As can be seen from FIG. 1, CNC direct emulsification of polydimethylsiloxane is not effective, and the resulting Pickering emulsion is unstable and very easy to break.

The wet combing work of the hair after application of the product was 0.8158J as measured by the hair tester.

Comparative example 2

(1) Preparation of the emulsion

To a 25ml dry clean beaker, 0.005g of CTAC is added according to the mass ratio of CTAC to the mixed solution of 0.05 percent, and deionized water is added until the total mass is 10 g. Placing the beaker filled with the mixed solution into an ice water bath, placing the beaker into an ultrasonic cell disruption instrument, controlling the temperature to be 20 ℃, performing ultrasonic treatment for 5min, and inputting specific energy to be 400J/g to prepare a CTAC solution.

And then taking a 25ml clean beaker, adding 6g of the CTAC solution into the beaker according to the mass ratio of CTAC being 0.03%, then adding 0.8g of polydimethylsiloxane (350mPa.s) into the beaker according to the mass ratio of polydimethylsiloxane being 8%, then adding deionized water to make the total mass of the system be 10g, and treating for 1min by using a high-speed dispersion machine 20000 r/min. Placing the beaker into an ultrasonic cell disruption instrument, controlling the temperature at 40 ℃, inputting the specific energy at 65J/g, and carrying out ultrasonic treatment for 1min (3s working and 2s pause) to prepare the emulsion with stable CTAC.

(2) Performance testing

After the emulsion was left to stand for 24 hours, the result was observed by a microscope and shown in FIG. 2; meanwhile, the particle size of the emulsion is measured by a Malvern laser particle sizer, and the result of the particle size distribution of the emulsion D4, 3 is shown in FIG. 7. As can be seen from fig. 2, CTAC emulsifies polydimethylsiloxane, but the emulsion droplet interface is easily broken, small droplets are aggregated into large droplets, and the emulsion is unstable. As can be seen from FIG. 7, the particle size ratio of the emulsion is not consistent with the particle size observed in the microscopic image, which indicates that the emulsion has broken during the test process, resulting in a smaller particle size test result of the emulsion. The emulsion obtained in this example was shown to be unstable.

Example 1

(1) Preparation of stable Pickering emulsion of cellulose nanowhiskers

Adding 0.5g of CNC powder into a clean beaker filled with 99.5g of deionized water, treating for 3min by using a high-speed dispersion machine 16000r/min, placing the uniformly stirred cellulose nanowhisker suspension into an ice water bath, placing the mixture into an ultrasonic cell disruption instrument, and carrying out ultrasonic treatment for 10min, controlling the temperature to be 10 ℃, and inputting the specific energy to be 10J/g to prepare the CNC suspension with the concentration of 0.5 wt%.

Adding 0.001g of CTAC into a 25ml dry clean beaker according to the mass ratio of 0.01 percent of the mixed solution, adding 9g of CNC suspension into the beaker according to the mass ratio of 0.45 percent of the cellulose nano whisker, and adding deionized water, wherein the total mass of the mixed solution is 10 g. And (3) placing the beaker filled with the mixed solution into an ultrasonic cell disruption instrument for ultrasonic treatment for 1min, controlling the temperature to be 40 ℃, and inputting the specific energy to be 40J/g to prepare the cation modified CNC suspension.

And taking a 25ml clean beaker, adding 6g of the cation modified CNC suspension into the beaker according to the mass ratio of 0.276% of the cation modified cellulose nano whisker, then adding 0.05g of polydimethylsiloxane (10mPa.s) into the beaker according to the mass ratio of 0.5% of polydimethylsiloxane, adding deionized water to make the total mass of the system be 10g, and treating for 5min by using a high-speed dispersion machine 3000r/min to obtain the modified cellulose nano whisker stable Pickering emulsion.

(2) Performance testing

After the Pickering emulsion was left to stand for 24 hours, the Pickering emulsion was observed by a microscope, and the results are shown in FIG. 3; meanwhile, the particle size of the emulsion is measured by a Malvern laser particle sizer, and the result of the particle size distribution of the emulsion D4, 3 is shown in FIG. 7. As can be seen from fig. 3, the modified cellulose nanowhiskers obtained in this example were able to emulsify polydimethylsiloxane efficiently, because the emulsification efficiency of polydimethylsiloxane by the modified cellulose nanowhiskers was significantly improved and a stable interface film was formed at the interface.

After the emulsion prepared by the embodiment is applied, the wet combing work of the hair is 0.5208J, which is measured by a hair tester and is reduced by 36.16% compared with that of comparative example 1, which indicates that the Pickering emulsion applied to hair care is successfully prepared.

Example 2

(1) Preparation of stable Pickering emulsion of cellulose nanowhiskers

Adding 0.5g of CNC powder into a clean beaker filled with 99.5g of deionized water, treating for 3min by using a high-speed dispersion machine 16000r/min, placing the uniformly stirred cellulose nanowhisker suspension into an ice water bath, placing the mixture into an ultrasonic cell disruption instrument, and carrying out ultrasonic treatment for 5min, controlling the temperature to be 10 ℃, and inputting the specific energy to be 40J/g to prepare the CNC suspension with the concentration of 0.5 wt%.

Adding 0.005g of CTAC into a 25ml dry clean beaker according to the mass ratio of 0.05 percent of the mixed solution, adding 9g of CNC suspension into the beaker according to the mass ratio of 0.45 percent of the cellulose nano whisker, and adding deionized water, wherein the total mass of the mixed solution is 10 g. And (3) putting the beaker filled with the mixed solution into an ultrasonic cell disruption instrument for ultrasonic treatment for 5min, controlling the temperature to be 20 ℃, and inputting the specific energy to be 400J/g to prepare the cation modified CNC suspension solution.

And then taking a 25ml clean beaker, adding 8g of the cation modified CNC suspension into the beaker according to the mass ratio of 0.40 percent of the cation modified cellulose nano whisker, then adding 0.8g of polydimethylsiloxane (350mPa.s) into the beaker according to the mass ratio of 8 percent of polydimethylsiloxane, then adding deionized water to ensure that the total mass of the system is 10g, and treating for 1min by using a high-speed dispersion machine 20000 r/min. And (3) putting the beaker into an ultrasonic cell disruption instrument, controlling the temperature to be 40 ℃, inputting the specific energy to be 65J/g, and carrying out ultrasonic treatment for 1min (3s work and 2s pause) to prepare the modified cellulose nano whisker stable Pickering emulsion.

(2) Performance testing

After the Pickering emulsion was left to stand for 24 hours, the result was observed by a microscope and shown in FIG. 4; meanwhile, the particle size of the emulsion is measured by a Malvern laser particle sizer, and the result of the particle size distribution of the emulsion D4, 3 is shown in figure 7. As can be seen from fig. 4, the modified cellulose nanowhiskers significantly improved the emulsification efficiency of polydimethylsiloxane, and formed a stable interfacial film at the interface. As can be seen from FIG. 7, the particle size distribution of the emulsion was concentrated.

After the emulsion prepared in the example was applied, the wet combing and combing work of the hair was 0.5119J, which is reduced by 37.25% compared with comparative example 1, and the result shows that the modified cellulose nanowhisker obtained in the example can efficiently emulsify polydimethylsiloxane, and the Pickering emulsion applied to hair care was successfully prepared.

Example 3

(1) Preparation of stable Pickering emulsion of cellulose nanowhiskers

Adding 0.5g of CNC powder into a clean beaker filled with 99.5g of deionized water, treating for 3min by using a high-speed dispersion machine 16000r/min, placing the uniformly stirred cellulose nanowhisker suspension into an ice water bath, placing the mixture into an ultrasonic cell disruption instrument, and carrying out ultrasonic treatment for 5min, controlling the temperature to be 10 ℃, and inputting the specific energy to be 40J/g to prepare the CNC suspension with the concentration of 0.5 wt%.

Adding 0.05g of octadecyl trimethyl ammonium chloride into a 25ml dry clean beaker according to the mass ratio of 0.5 percent of the mixed solution, then adding 9g of CNC suspension into the beaker according to the mass ratio of 0.45 percent of the cellulose nano crystal whisker to the mixed solution, and then adding deionized water, wherein the total mass of the mixed solution is 10 g. And (3) putting the beaker filled with the mixed solution into an ultrasonic cell disruption instrument for ultrasonic treatment for 10min, controlling the temperature to be 10 ℃, and inputting the specific energy to be 1000J/g to prepare the cation modified CNC suspension solution.

And then taking a 25ml clean beaker, adding 9g of the cation modified CNC suspension into the beaker according to the mass ratio of 0.855% of the cation modified cellulose nano whisker, then adding 1g of polydimethylsiloxane (500mPa.s) into the beaker according to the mass ratio of 10% of the polydimethylsiloxane, wherein the total mass of the system is 10g, and treating for 2min by using a high-speed dispersion machine at 10000 r/min. And (3) putting the beaker into an ultrasonic cell disruption instrument, controlling the temperature to be 10 ℃, inputting the specific energy to be 100J/g, and carrying out ultrasonic treatment for 5min (3s of work and 2s of pause) to prepare the modified cellulose nano whisker stable Pickering emulsion.

(2) Performance testing

The Pickering emulsion was allowed to stand for 24 hours and then observed with a microscope, and the results are shown in FIG. 5; and the particle size of the emulsion is measured by a Malvern laser particle sizer, and the result of the particle size distribution of the emulsion D4, 3 is shown in FIG. 7. As can be seen from fig. 5, the modified cellulose nanowhiskers significantly improved the emulsification efficiency of polydimethylsiloxane, and formed a stable interfacial film at the interface. As can be seen from FIG. 7, the particle size distribution of the emulsion was concentrated.

After the emulsion prepared in the example is applied, the wet combing and combing work of the hair is 0.4841J, which is reduced by 40.65% compared with that of comparative example 1, and the result is shown that the cationic modified cellulose nanowhisker obtained in the example can efficiently emulsify polydimethylsiloxane, and the Pickering emulsion applied to hair care is successfully prepared.

Example 4

(1) Preparation of stable Pickering emulsion of cellulose nanowhiskers

Adding 1g of CNC powder into a clean beaker filled with 99g of deionized water, treating for 3min by using a high-speed dispersion machine 16000r/min, placing the uniformly stirred cellulose nanowhisker suspension into an ice water bath, placing the mixture into an ultrasonic cell disruption instrument, and carrying out ultrasonic treatment for 5min, wherein the temperature is controlled at 10 ℃, and the specific energy is input into 40J/g, so as to prepare the CNC suspension with the concentration of 1.0 wt%.

0.1g of octadecyl trimethyl ammonium chloride is added into a 25ml dry clean beaker according to the mass ratio of 1 percent of the mixed solution, and then 4.5g of CNC suspension liquid and deionized water are added into the beaker according to the mass ratio of 0.45 percent of the cellulose nano crystal whisker to the mixed solution, wherein the total mass of the mixed solution is 10 g. And (3) putting the beaker filled with the mixed solution into an ultrasonic cell disruption instrument for ultrasonic treatment for 10min, controlling the temperature to be 10 ℃, and inputting the specific energy to be 1000J/g to prepare the cation modified CNC suspension solution.

And then taking a 25ml clean beaker, adding 9g of the cation modified CNC suspension into the beaker according to the mass ratio of 1.305 percent of the cation modified cellulose nano whisker, and then adding 1g of polydimethylsiloxane (1000mPa.s) into the beaker according to the mass ratio of 10 percent of the polydimethylsiloxane, wherein the total mass of the system is 10 g. And (3) putting the beaker into an ultrasonic cell disruption instrument, controlling the temperature to be 10 ℃, inputting the specific energy to be 500J/g, and carrying out ultrasonic treatment for 10min (3s work and 2s pause) to prepare the modified cellulose nano whisker stable Pickering emulsion.

(2) Performance testing

The Pickering emulsion was allowed to stand for 24 hours and then observed with a microscope, and the results are shown in FIG. 6; and the particle size of the emulsion is measured by a Malvern laser particle sizer, and the result of the particle size distribution of the emulsion D4, 3 is shown in FIG. 7. As can be seen from fig. 6, the modified cellulose nanowhiskers significantly improved the emulsification efficiency of polydimethylsiloxane, and formed a stable interfacial film at the interface. As can be seen from FIG. 7, the particle size distribution of the emulsion was concentrated.

After the emulsion prepared in the example is applied, the wet combing and combing work of the hair is 0.4185J, which is reduced by 48.70% compared with that of comparative example 1, and the result is shown that the cationic modified cellulose nanowhisker obtained in the example can efficiently emulsify polydimethylsiloxane, and the Pickering emulsion applied to hair care is successfully prepared.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.