Cellulose modified softener microcapsule, preparation method and application thereof

Abstract

The present invention relates to the technical field of softeners, and in particular to a cellulose modified softener microcapsule, a preparation method and application thereof. The cellulose modified softener microcapsule comprises a core layer and a shell layer; the core layer comprises silicone oil; the shell layer comprises a hydrophilic layer located on the outside and an intermediate layer located on the inside; the raw materials for preparing the shell layer comprise modified cellulose and non-cationic molecules; the non-cationic molecules are melamine or melamine resin; the modified cellulose comprises a hydrophilic part and a hydrophobic part; the hydrophobic layer comprises the hydrophobic part of the modified cellulose and the non-cationic molecules; the hydrophilic layer comprises the hydrophilic part of the modified cellulose. The cellulose modified softener microcapsule has better strength in water, is not easy to break, and can be better attached to clothing.

Description

Technical Field

[0001] The invention relates to the technical field of softeners, and in particular to a cellulose modified softener microcapsule, a preparation method and application thereof. Background Art

[0002] Most existing softeners are cationic surfactants, which are easily dispersed in water during washing, but also have low adhesion to clothes and are easily lost with water during washing. In order to solve the above problems, the softening components can be encapsulated in the form of microcapsules, and the components that are not easily lost with water are used as the shell layer of the microcapsules. However, the current microcapsule shell structure is not strong enough and is easily broken during washing, and its dispersion performance in water is reduced.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a cellulose modified softener microcapsule, a preparation method and application thereof, aiming to improve the shell strength, dispersion performance in water and adhesion performance of the softener to clothes.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The first aspect of the present invention provides a cellulose modified softener microcapsule, comprising a core layer and a shell layer; the core layer comprises silicone oil; the shell layer comprises a hydrophilic layer located on the outside and an intermediate layer located on the inside; the raw materials for preparing the shell layer comprise modified cellulose and non-cationic molecules; the non-cationic molecules are melamine or melamine resin; the modified cellulose comprises a hydrophilic part and a hydrophobic part; the hydrophobic layer comprises the hydrophobic part of the modified cellulose and the non-cationic molecules; the hydrophilic layer comprises the hydrophilic part of the modified cellulose.

[0007] The cellulose modified softener microcapsules, wherein the weight average molecular weight of the modified cellulose is 20,000 to 200,000.

[0008] The cellulose modified softener microcapsules are characterized in that the modified cellulose is modified with hydrophilic groups and hydrophobic groups; the number of the hydrophilic groups is 5% to 75% of the total active hydroxyl groups in the modified cellulose, and the number of the hydrophobic groups is 1% to 50% of the total active hydroxyl groups in the modified cellulose.

[0009] The cellulose modified softener microcapsules, wherein the hydrophilic group includes one or more of ethoxy, polyethoxy, propoxy, amino, quaternary ammonium, and phosphate groups.

[0010] The cellulose modified softener microcapsule, wherein the hydrophobic group includes one or more of a polysiloxane group, a fatty group, a silane group, and a perfluoromethyl to perfluoro-12-alkyl group.

[0011] The cellulose modified softener microcapsules, wherein the silicone oil includes polyether modified silicone oil and amino modified silicone oil.

[0012] The second aspect of the present invention provides a method for preparing microcapsules, which is used to prepare the cellulose modified softener microcapsules as described above, comprising the following steps:

[0013] S001. Add silicone oil, a raw material for preparing the core layer, and melamine or melamine resin, a raw material for preparing the shell layer, to water and stir at high speed at 50 ° C to obtain an intermediate;

[0014] S002. Add a solubilizer dropwise to the modified cellulose solution, then add the intermediate dropwise, and stir evenly at a low speed at 50° C. to obtain the cellulose modified softener microcapsule.

[0015] The method for preparing microcapsules, wherein the mass ratio of the silicone oil to melamine or melamine resin is (31-37):(3-9).

[0016] The method for preparing microcapsules, wherein the mass ratio of the silicone oil to melamine or melamine resin is (33-35):(5-7).

[0017] The third aspect of the present invention provides the use of the cellulose modified softener microcapsules as described above in fragrance beads, softeners, laundry tablets or laundry liquids.

[0018] Beneficial effects: The present invention provides a cellulose modified softener microcapsule, which has a double-shell structure with silicone oil as a core layer and melamine or melamine resin combined with modified cellulose as a shell layer. The inner middle layer is composed of the hydrophobic part of melamine or melamine resin combined with modified cellulose, connected with silicone oil, and has good structural strength in water; the outer hydrophilic layer is composed of the hydrophilic part of modified cellulose, contacts with water, has good dispersibility, and can be well attached to clothes.

[0019] The present invention also provides a method for preparing microcapsules, by first preparing an intermediate structure formed by silicone oil and melamine or melamine resin, and then further introducing modified cellulose to strengthen the shell structure, and improving the dispersion performance of the microcapsules in water and the adhesion performance to clothes by the modified cellulose. DETAILED DESCRIPTION

[0020] The present invention provides a cellulose modified softener microcapsule, a preparation method and application thereof. To make the purpose, technical scheme and effect of the present invention clearer and more specific, the present invention is further described in detail by the following examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The first aspect of the present invention provides a cellulose modified softener microcapsule, comprising a core layer and a shell layer; the core layer comprises silicone oil; the shell layer comprises a hydrophilic layer located on the outside and an intermediate layer located on the inside; the raw materials for preparing the shell layer comprise modified cellulose and non-cationic molecules; the non-cationic molecules are melamine or melamine resin; the modified cellulose comprises a hydrophilic part and a hydrophobic part; the hydrophobic layer comprises the hydrophobic part of the modified cellulose and the non-cationic molecules; the hydrophilic layer comprises the hydrophilic part of the modified cellulose.

[0022] Specifically, silicone oil is a key component that plays a softening role. It can form a thin film covering the surface of clothing, making the clothing soft, smooth, easy to iron, and can reduce static electricity. Melamine or melamine resin can coat silicone oil in water to form a shell. Since melamine or melamine resin is not a cationic molecule, it is not easy to lose in water and can have good adhesion to clothes. Modified cellulose has two types of functional groups, hydrophilic and hydrophobic, so that modified cellulose has multiple hydrophobic and hydrophilic parts. The hydrophobic part of modified cellulose will be incorporated into the shell structure formed by non-cationic molecules and connected with silicone oil to form a denser structure with higher strength in water, while the hydrophilic part of modified cellulose will be located in the outermost layer and cover the shell structure formed by non-cationic molecules. In addition, the presence of modified cellulose can make it easier for microcapsules to attach to clothing, so that the microcapsules can be evenly attached to clothing after being quickly dispersed in water, and are not easy to be washed away. After the microcapsules attached to the clothes dry, they can be easily broken by friction, releasing silicone oil to cover the surface of the clothes.

[0023] Preferably, the weight average molecular weight of the modified cellulose is 20,000 to 200,000. If the weight average molecular weight of the modified cellulose is too small, the strength of the microcapsule wall will decrease, and if the weight average molecular weight of the modified cellulose is too large, it will dissolve too slowly and increase the water absorption ratio, which is not conducive to the formation of the microcapsule wall.

[0024] Specifically, the modified cellulose is modified with a hydrophilic group and a hydrophobic group.

[0025] In a further preferred embodiment, the amount of the hydrophilic group is 5% to 75% of the total active hydroxyl groups in the modified cellulose, and the amount of the hydrophobic group is 1% to 50% of the total active hydroxyl groups in the modified cellulose. The role of the hydrophilic group is to strengthen the interaction with clothing fibers after the microcapsules are formed, and to increase the adhesion between the capsules and the fibers. The role of the hydrophobic group is to insert into the interior of the microcapsule, to have a strong interaction with the capsule, and to strengthen the strength of the microcapsule itself.

[0026] Preferably, the particle size of the softener microcapsules is 22 to 25 microns.

[0027] Specifically, the hydrophilic group includes one or more of ethoxy group, polyethoxy group, propoxy group, amino group, quaternary ammonium group and phosphate group.

[0028] The hydrophobic group includes one or more of polysiloxane, aliphatic, silane, and perfluoromethyl to perfluoro-12-alkyl. Preferably, the carbon chain carbon number of the aliphatic group is 2 to 6. The polymerization degree of the polysiloxane group is 4 to 20. The silane group is preferably Si4 to Si14 silane.

[0029] Preferably, the silicone oil includes polyether-modified silicone oil and amino-modified silicone oil. Amino-modified silicone oil has good adsorption, compatibility and easy emulsification. By compounding polyether-modified silicone oil and amino-modified silicone oil, the softening effect can be better.

[0030] Preferably, the mass ratio of the polyether-modified silicone oil to the amino-modified silicone oil is (2-5): 1. Within the above ratio range, the softening effect of the composite system is the best.

[0031] The second aspect of the present invention provides a method for preparing microcapsules, which is used to prepare the cellulose modified softener microcapsules as described above, comprising the following steps:

[0032] S001. Add silicone oil, a raw material for preparing the core layer, and melamine or melamine resin, a raw material for preparing the shell layer, to water and stir at high speed at 50 ° C to obtain an intermediate;

[0033] S002. Add a solubilizer dropwise to the modified cellulose solution, then add the intermediate dropwise, and stir evenly at a low speed at 50° C. to obtain the cellulose modified softener microcapsule.

[0034] Preferably, the modified cellulose solution is prepared by dissolving 5 to 15 parts of modified cellulose in 1000 parts of water.

[0035] The solubilizer is used to make the intermediate dispersed better in the modified cellulose solution. Specifically, the solubilizer includes but is not limited to small molecule alcohols and polyols.

[0036] Preferably, the mass ratio of the silicone oil to melamine or melamine resin is (31-37):(3-9).

[0037] In a further preferred embodiment, the mass ratio of the silicone oil to melamine or melamine resin is (33-35):(5-7). Within the above mass ratio range, the particle size of the softener microcapsules formed is in the optimal range, and the shell thickness is also in the optimal range.

[0038] Specifically, the cellulose modified softener microcapsules of the present invention can be applied to fragrance beads, softeners, laundry tablets or laundry liquids. When applied to softeners, as the main component of the softener, the softener can also be added with other types of softeners, flavors and other raw materials.

[0039] Example 1

[0040] A cellulose modified softener microcapsule, the preparation method of which comprises the following steps:

[0041] S001. Add 340 parts of silicone oil and 60 parts of melamine to 400 parts of water, stir at high speed (10000r / min) at 50°C for 10 minutes to obtain an intermediate;

[0042] Wherein, the silicone oil is composed of polyether-modified silicone oil and amino-modified silicone oil in a mass ratio of 4:1; the ammonia value of the amino-modified silicone oil is 200 mgKOH / g;

[0043] S002. Add a solubilizer to the modified cellulose solution, then add the intermediate, stir at a low speed (2000r / min) at 50°C for 10 minutes to obtain the cellulose modified softener microcapsules; the modified cellulose solution is prepared by dissolving 10 parts of modified cellulose in 1000 parts of water, the solubilizer is ethylene glycol, and the amount added is 5 parts;

[0044] Wherein, the weight average molecular weight of the modified cellulose is 110,000 to 120,000;

[0045] In the modified cellulose, the number of phosphate groups is 15% of the total active hydroxyl groups in the modified cellulose, and the number of silane groups is 7% of the total active hydroxyl groups in the modified cellulose. The modified cellulose was purchased from Nanfeng County Daxin Technology Co., Ltd.

[0046] Example 2

[0047] A cellulose modified softener microcapsule, the preparation method of which comprises the following steps:

[0048] S001. Add 360 parts of silicone oil and 30 parts of melamine to 400 parts of water, stir at high speed (10000r / min) at 50°C for 10 minutes to obtain an intermediate;

[0049] Wherein, the silicone oil is composed of polyether-modified silicone oil and amino-modified silicone oil in a mass ratio of 4:1; the ammonia value of the amino-modified silicone oil is 200 mgKOH / g;

[0050] S002. Add a solubilizer to the modified cellulose solution, then add the intermediate, stir at a low speed (2000r / min) at 50°C for 10 minutes to obtain the cellulose modified softener microcapsules; the modified cellulose solution is prepared by dissolving 10 parts of modified cellulose in 1000 parts of water, the solubilizer is ethylene glycol, and the amount added is 5 parts;

[0051] Wherein, the weight average molecular weight of the modified cellulose is 190,000 to 200,000;

[0052] In the modified cellulose, the number of phosphate groups is 15% of the total active hydroxyl groups in the modified cellulose, and the number of silane groups is 7% of the total active hydroxyl groups in the modified cellulose. The modified cellulose was purchased from Nanfeng County Daxin Technology Co., Ltd.

[0053] Example 3

[0054] A cellulose modified softener microcapsule, the preparation method of which comprises the following steps:

[0055] S001. Add 320 parts of silicone oil and 90 parts of melamine to 400 parts of water, stir at high speed (10000r / min) at 50°C for 10 minutes to obtain an intermediate;

[0056] Wherein, the silicone oil is composed of polyether-modified silicone oil and amino-modified silicone oil in a mass ratio of 4:1; the ammonia value of the amino-modified silicone oil is 200 mgKOH / g;

[0057] S002. Add a solubilizer to the modified cellulose solution, then add the intermediate, stir at a low speed (2000r / min) at 50°C for 10 minutes to obtain the cellulose modified softener microcapsules; the modified cellulose solution is prepared by dissolving 10 parts of modified cellulose in 1000 parts of water, the solubilizer is ethylene glycol, and the amount added is 5 parts;

[0058] Wherein, the weight average molecular weight of the modified cellulose is 20,000 to 30,000;

[0059] In the modified cellulose, the number of phosphate groups is 15% of the total active hydroxyl groups in the modified cellulose, and the number of silane groups is 7% of the total active hydroxyl groups in the modified cellulose. The modified cellulose was purchased from Nanfeng County Daxin Technology Co., Ltd.

[0060] Example 4

[0061] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 1 in that the silicone oil consists of polyether modified silicone oil and amino modified silicone oil in a mass ratio of 2:1.

[0062] Example 5

[0063] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 1 in that the silicone oil is composed of polyether modified silicone oil and amino modified silicone oil in a mass ratio of 5:1.

[0064] Example 6

[0065] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 1 in that the modified cellulose solution is prepared by dissolving 15 parts of modified cellulose in 1000 parts of water.

[0066] Example 7

[0067] A cellulose modified softener microcapsule, the preparation method of which comprises the following steps:

[0068] S001. Add 340 parts of silicone oil and 50 parts of melamine resin to 400 parts of water, stir at high speed (10000r / min) at 50°C for 10 minutes to obtain an intermediate;

[0069] Wherein, the silicone oil is composed of polyether-modified silicone oil and amino-modified silicone oil in a mass ratio of 4:1; the ammonia value of the amino-modified silicone oil is 200 mgKOH / g;

[0070] S002. Add a solubilizer to the modified cellulose solution, then add the intermediate, stir at a low speed (2000r / min) at 50°C for 10 minutes to obtain the cellulose modified softener microcapsules; the modified cellulose solution is prepared by dissolving 10 parts of modified cellulose in 1000 parts of water, the solubilizer is ethylene glycol, and the amount added is 5 parts;

[0071] Wherein, the weight average molecular weight of the modified cellulose is 190,000 to 200,000;

[0072] In the modified cellulose, the number of phosphate groups is 15% of the total active hydroxyl groups in the modified cellulose, and the number of silane groups is 7% of the total active hydroxyl groups in the modified cellulose. The modified cellulose was purchased from Nanfeng County Daxin Technology Co., Ltd.

[0073] Example 8

[0074] A cellulose modified softener microcapsule, the preparation method of which comprises the following steps:

[0075] S001. Add 340 parts of silicone oil and 60 parts of melamine resin to 400 parts of water, stir at high speed (10000r / min) at 50°C for 10 minutes to obtain an intermediate;

[0076] Wherein, the silicone oil is composed of polyether-modified silicone oil and amino-modified silicone oil in a mass ratio of 4:1; the ammonia value of the amino-modified silicone oil is 200 mgKOH / g;

[0077] S002. Add a solubilizer to the modified cellulose solution, then add the intermediate, stir at a low speed (2000r / min) at 50°C for 10 minutes to obtain the cellulose modified softener microcapsules; the modified cellulose solution is prepared by dissolving 10 parts of modified cellulose in 1000 parts of water, the solubilizer is ethylene glycol, and the amount added is 5 parts;

[0078] Wherein, the weight average molecular weight of the modified cellulose is 190,000 to 200,000;

[0079] In the modified cellulose, the number of phosphate groups is 15% of the total active hydroxyl groups in the modified cellulose, and the number of silane groups is 7% of the total active hydroxyl groups in the modified cellulose. The modified cellulose was purchased from Nanfeng County Daxin Technology Co., Ltd.

[0080] Example 9

[0081] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 1 in that the usage ratio of silicone oil to melamine is different:

[0082] In this example, 340 parts of silicone oil and 90 parts of melamine were used.

[0083] Example 10

[0084] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 1 in that the usage ratio of silicone oil to melamine is different:

[0085] In this embodiment, 340 parts of silicone oil and 30 parts of melamine were used.

[0086] Comparative Example 1

[0087] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 7 in that the usage ratio of silicone oil to melamine resin is different:

[0088] In this comparative example, 370 parts of silicone oil and 20 parts of melamine were used.

[0089] Comparative Example 2

[0090] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 7 in that the usage ratio of silicone oil to melamine resin is different:

[0091] In this comparative example, 320 parts of silicone oil and 110 parts of melamine were used.

[0092] Comparative Example 3

[0093] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 1 in that ordinary cellulose is used for modification, the number of phosphate groups of the ordinary cellulose is 0, and the number of silane groups is 0.

[0094] Comparative Example 4

[0095] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 1 in that the modified cellulose solution is prepared by dissolving 20 parts of modified cellulose in 1000 parts of water.

[0096] Comparative Example 5

[0097] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 1 in that the weight average molecular weight of the modified cellulose is 280,000 to 300,000.

[0098] Comparative Example 6

[0099] A cellulose modified softener microcapsule, the preparation method of which is different from that of Example 1 in that the weight average molecular weight of the modified cellulose is 8,000 to 14,000.

[0100] Comparative Example 7

[0101] A softener microcapsule, the preparation method of which comprises the following steps:

[0102] 340 parts of silicone oil and 60 parts of melamine were added to 400 parts of water, and stirred at high speed (10000 r / min) for 10 minutes at 50°C to prepare softener microcapsules;

[0103] The silicone oil is composed of polyether-modified silicone oil and amino-modified silicone oil in a mass ratio of 4:1; the ammonia value of the amino-modified silicone oil is 200 mgKOH / g.

[0104] 1. Use a microscope to measure the particle size of the above softener microcapsules.

[0105] 2. The strength of the microcapsules was characterized by an indirect determination method by measuring the amount of content released from the softener microcapsules. The method is as follows: Based on the preparation methods of the above embodiments and comparative examples, a low-boiling point flavor (boiling point of 75-78°C) was added to the silicone oil, and the mass ratio of silicone oil to flavor was 99:1, and then the softener microcapsules were further prepared. The content M of the flavor was measured by headspace injection. Headspace injection conditions: heating box temperature: 60°C, quantitative loop temperature: 65°C, transmission line: 105°C, sample equilibration time: 30min, GC cycle: 45min. Silicone oil content A1 = (M ÷ 1) × 99, breakage rate = silicone oil content A1 ÷ silicone oil content A2 in microcapsules × 100%.

[0106] 3. Determine the softening effect of the softener microcapsules. The softening effect test is carried out in accordance with GB / T18318.1-2009 and is expressed by the reduction value of the straight bending length ΔL. Wherein, ΔL: the change in bending length before and after fabric treatment, accurate to one decimal place; L before treatment: the bending length of fabric before treatment, in cm; L after treatment: the bending length of fabric after treatment, in cm; Note: the smaller the straight bending length, the better the softening effect of the laundry composition. The pretreatment method is: the laundry composition is fully dissolved in deionized water, and the fabric sample to be tested is put into the bath ratio of 1:50, stirred and soaked for 20 minutes (stirred once every 5 minutes, each time for 30 seconds), taken out and dehydrated, and dried at 80℃ for use.

[0107] 4. Determine the effect of softener microcapsules on the attachment of clothes as follows: add three pieces of laundry to a softener microcapsule solution of a specific concentration and soak for 50 minutes. Then observe the residual amount of softener microcapsule solution in the dehydration liquid under a microscope, and calculate the attachment rate based on the number of microcapsules per unit volume in the solution before washing and the number of microcapsules per unit volume in the solution after washing.

[0108] The particle size distribution and shell thickness of the microcapsules of the above embodiments and comparative examples are shown in Table 1, and the microcapsule breakage rate, bending length reduction value and microcapsule attachment rate are shown in Table 2.

[0109] The particle size distribution and shell thickness of the microcapsules of the above embodiments and comparative examples are shown in Table 1.

[0110] Table 1

[0111] Particle size (micrometer) Example 1 15.9 Example 2 20.4 Example 3 14.5 Example 4 15.9 Example 5 15.8 Example 6 15.6 Example 7 16.7 Example 8 15.4 Example 9 14.3 Example 10 20.1 Comparative Example 1 25.3 Comparative Example 2 14.2 Comparative Example 3 30.3 Comparative Example 4 15.6 Comparative Example 5 10.1 Comparative Example 6 28.5 Comparative Example 7 34

[0112] Table 2

[0113]

[0114]

[0115] It can be seen from the results in Table 1 and Table 2 that the microcapsules of Examples 1 to 10 all have a lower breakage rate, and better softening effect and adhesion performance.

[0116] Compared with the embodiment, the comparative example 1 uses more silicone oil and less shell material, so the shell obtained is thinner and has lower strength, resulting in a high breakage rate and a large loss of silicone oil, resulting in a poor softening effect.

[0117] Compared with the embodiment, the comparative example 2 uses less silicone oil and more shell raw materials, so the shell layer is thicker and has higher strength. Although the breakage rate is low, it is not easy to break, and the silicone oil is difficult to release, which also leads to poor softening effect.

[0118] Compared with the embodiment, the comparative example 3 adopts ordinary cellulose, which has inferior adhesion performance to clothes as the modified cellulose, so the adhesion rate of microcapsules is low and the corresponding softening effect is also poor.

[0119] Compared with the embodiment, comparative example 4 uses more cellulose. When the amount of cellulose is large, the shell layer will be thicker and stronger, and the silicone oil will be difficult to release, resulting in poor softening effect.

[0120] Compared with the embodiment, Comparative Example 5 uses cellulose with a larger molecular weight. Although the microcapsules made from cellulose with a larger molecular weight have better performance, it is found in actual operation that cellulose dissolves slowly, the yield of microcapsules is not high, the loss of cellulose is large, and the cost will be high.

[0121] Compared with the example, Comparative Example 6 uses cellulose with a smaller molecular weight. The microcapsules formed by the cellulose with a smaller molecular weight have lower strength, resulting in a high breakage rate and a large loss of silicone oil, resulting in a poor softening effect.

[0122] Comparative Example 7 is a microcapsule without cellulose, and it can be seen that its breakage rate is the highest, the adhesion is the worst, and the corresponding softening effect is also the worst.

[0123] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. A cellulose modified softener microcapsule, characterized in that: It comprises a core layer and a shell layer; the core layer comprises silicone oil; the shell layer comprises a hydrophilic layer located on the outside and an intermediate layer located on the inside; the raw materials for preparing the shell layer comprise modified cellulose and non-cationic molecules; the non-cationic molecules are melamine or melamine resin; the modified cellulose comprises a hydrophilic part and a hydrophobic part; the hydrophobic layer comprises the hydrophobic part of the modified cellulose and the non-cationic molecules; the hydrophilic layer comprises the hydrophilic part of the modified cellulose.

2. The cellulose modified softener microcapsule according to claim 1, characterized in that: The weight average molecular weight of the modified cellulose is 20,000 to 200,000.

3. The cellulose modified softener microcapsule according to claim 1, characterized in that: The modified cellulose is modified with hydrophilic groups and hydrophobic groups; the number of the hydrophilic groups is 5% to 75% of the total active hydroxyl groups in the modified cellulose, and the number of the hydrophobic groups is 1% to 50% of the total active hydroxyl groups in the modified cellulose.

4. The cellulose modified softener microcapsule according to claim 3, characterized in that: The hydrophilic group includes one or more of ethoxy, polyethoxy, propoxy, amino, quaternary ammonium and phosphate groups.

5. The cellulose modified softener microcapsule according to claim 3, characterized in that: The hydrophobic group includes one or more of a polysiloxane group, a fatty group, a silane group, and a perfluoromethyl group to a perfluoro-12-alkyl group.

6. The cellulose modified softener microcapsule according to claim 1, characterized in that: The silicone oil includes polyether-modified silicone oil and amino-modified silicone oil.

7. A method for preparing microcapsules, characterized in that: The method for preparing the cellulose modified softener microcapsules according to any one of claims 1 to 6 comprises the following steps: S001. Add silicone oil, a raw material for preparing the core layer, and melamine or melamine resin, a raw material for preparing the shell layer, to water and stir at high speed at 50 ° C to obtain an intermediate; S002. Add a solubilizer dropwise to the modified cellulose solution, then add the intermediate dropwise, and stir evenly at a low speed at 50° C. to obtain the cellulose modified softener microcapsule.

8. The method for preparing microcapsules according to claim 7, characterized in that: The mass ratio of the silicone oil to melamine or melamine resin is (31-37):(3-9).

9. The method for preparing microcapsules according to claim 8, characterized in that: The mass ratio of the silicone oil to melamine or melamine resin is (33-35):(5-7).

10. Use of the cellulose modified softener microcapsules according to any one of claims 1 to 6 in fragrance beads, softeners, laundry tablets or laundry liquids.

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