CN114921865B - Regenerated cellulose fiber containing nanometer particles of extracts of avocado and shea and preparation method thereof - Google Patents
Regenerated cellulose fiber containing nanometer particles of extracts of avocado and shea and preparation method thereof Download PDFInfo
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- CN114921865B CN114921865B CN202210606428.5A CN202210606428A CN114921865B CN 114921865 B CN114921865 B CN 114921865B CN 202210606428 A CN202210606428 A CN 202210606428A CN 114921865 B CN114921865 B CN 114921865B
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- 239000000284 extract Substances 0.000 title claims abstract description 65
- 229920003043 Cellulose fiber Polymers 0.000 title claims abstract description 60
- 239000004627 regenerated cellulose Substances 0.000 title claims abstract description 60
- 235000018936 Vitellaria paradoxa Nutrition 0.000 title claims abstract description 55
- 244000025272 Persea americana Species 0.000 title claims abstract description 28
- 235000008673 Persea americana Nutrition 0.000 title claims abstract description 28
- 239000002245 particle Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical class CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000009987 spinning Methods 0.000 claims abstract description 55
- 239000002105 nanoparticle Substances 0.000 claims abstract description 47
- 239000000661 sodium alginate Substances 0.000 claims abstract description 39
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 39
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 39
- 108010047956 Nucleosomes Proteins 0.000 claims abstract description 23
- 210000001623 nucleosome Anatomy 0.000 claims abstract description 23
- 229940059958 centella asiatica extract Drugs 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims description 56
- 241001135917 Vitellaria paradoxa Species 0.000 claims description 52
- 238000003756 stirring Methods 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000000839 emulsion Substances 0.000 claims description 31
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 30
- 229940057910 shea butter Drugs 0.000 claims description 29
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 26
- 239000012153 distilled water Substances 0.000 claims description 25
- -1 nitrogen-containing organic compound Chemical class 0.000 claims description 20
- JQWHASGSAFIOCM-UHFFFAOYSA-M sodium periodate Chemical compound [Na+].[O-]I(=O)(=O)=O JQWHASGSAFIOCM-UHFFFAOYSA-M 0.000 claims description 20
- 239000003607 modifier Substances 0.000 claims description 17
- 239000011259 mixed solution Substances 0.000 claims description 11
- YZYASTRURKBPPS-UHFFFAOYSA-N C(CCC(=O)OCCCCCC(C)C)(=O)OCCCCCC(C)C.[Na] Chemical compound C(CCC(=O)OCCCCCC(C)C)(=O)OCCCCCC(C)C.[Na] YZYASTRURKBPPS-UHFFFAOYSA-N 0.000 claims description 10
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 10
- 241000220317 Rosa Species 0.000 claims description 10
- 239000001110 calcium chloride Substances 0.000 claims description 10
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 10
- 150000004985 diamines Chemical class 0.000 claims description 10
- 235000020710 ginseng extract Nutrition 0.000 claims description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims description 10
- ITCAUAYQCALGGV-XTICBAGASA-M sodium;(1r,4ar,4br,10ar)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylate Chemical group [Na+].C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C([O-])=O ITCAUAYQCALGGV-XTICBAGASA-M 0.000 claims description 10
- 238000001694 spray drying Methods 0.000 claims description 10
- 238000000967 suction filtration Methods 0.000 claims description 10
- 238000009210 therapy by ultrasound Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 238000005119 centrifugation Methods 0.000 claims description 7
- BEOOHQFXGBMRKU-UHFFFAOYSA-N sodium cyanoborohydride Chemical compound [Na+].[B-]C#N BEOOHQFXGBMRKU-UHFFFAOYSA-N 0.000 claims description 7
- 239000011258 core-shell material Substances 0.000 claims description 6
- 241000208340 Araliaceae Species 0.000 claims description 5
- 241000628997 Flos Species 0.000 claims description 5
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 5
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 5
- IBVAQQYNSHJXBV-UHFFFAOYSA-N adipic acid dihydrazide Chemical compound NNC(=O)CCCCC(=O)NN IBVAQQYNSHJXBV-UHFFFAOYSA-N 0.000 claims description 5
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 5
- 235000008434 ginseng Nutrition 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- BFDDMZKDAIOGFP-UHFFFAOYSA-N n,n-dimethyloctan-1-amine;hydrochloride Chemical compound [Cl-].CCCCCCCC[NH+](C)C BFDDMZKDAIOGFP-UHFFFAOYSA-N 0.000 claims description 5
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 5
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 5
- 239000008055 phosphate buffer solution Substances 0.000 claims description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 5
- 230000036632 reaction speed Effects 0.000 claims description 5
- 238000001953 recrystallisation Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 48
- 229920000297 Rayon Polymers 0.000 abstract description 17
- 239000004480 active ingredient Substances 0.000 abstract description 17
- 238000004043 dyeing Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 12
- 230000004048 modification Effects 0.000 abstract description 8
- 238000012986 modification Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 125000003368 amide group Chemical group 0.000 abstract description 7
- 244000146462 Centella asiatica Species 0.000 abstract description 6
- 235000004032 Centella asiatica Nutrition 0.000 abstract description 6
- 125000002091 cationic group Chemical group 0.000 abstract description 6
- 125000001453 quaternary ammonium group Chemical group 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 235000013399 edible fruits Nutrition 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 9
- 238000005406 washing Methods 0.000 description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 7
- 239000003094 microcapsule Substances 0.000 description 7
- 238000011068 loading method Methods 0.000 description 6
- 239000000419 plant extract Substances 0.000 description 6
- 241000222122 Candida albicans Species 0.000 description 5
- 241000588724 Escherichia coli Species 0.000 description 5
- 206010035664 Pneumonia Diseases 0.000 description 5
- 241000191967 Staphylococcus aureus Species 0.000 description 5
- 229940095731 candida albicans Drugs 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229920000289 Polyquaternium Polymers 0.000 description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 230000001112 coagulating effect Effects 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000005554 pickling Methods 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 235000011152 sodium sulphate Nutrition 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000003385 bacteriostatic effect Effects 0.000 description 3
- 238000013270 controlled release Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 3
- 229910000033 sodium borohydride Inorganic materials 0.000 description 3
- 239000012279 sodium borohydride Substances 0.000 description 3
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- 241000167550 Centella Species 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000003242 anti bacterial agent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000002779 inactivation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000001525 mentha piperita l. herb oil Substances 0.000 description 2
- 210000004940 nucleus Anatomy 0.000 description 2
- 235000019477 peppermint oil Nutrition 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000010677 tea tree oil Substances 0.000 description 2
- 229940111630 tea tree oil Drugs 0.000 description 2
- 229920000858 Cyclodextrin Polymers 0.000 description 1
- 239000001116 FEMA 4028 Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 description 1
- 235000011175 beta-cyclodextrine Nutrition 0.000 description 1
- 229960004853 betadex Drugs 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940068517 fruit extracts Drugs 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
- D01F2/10—Addition to the spinning solution or spinning bath of substances which exert their effect equally well in either
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
- Cosmetics (AREA)
Abstract
The invention provides regenerated cellulose fibers containing nanometer particles of extracts of avocados and shea fruits and a preparation method thereof, wherein the active nanometer particles account for 5-15% in the preparation raw materials of the regenerated cellulose fibers, and the balance is spinning solution. The preparation method comprises the steps of preparing modified sodium alginate, preparing active nano particles, preparing blending spinning solution and spinning and forming. The hydrophilic property of the sodium alginate is reduced, the polarity difference between the shell and the nucleosome is increased, the phenomenon that centella asiatica extract is easy to separate out in viscose spinning solution is avoided, the problem that active ingredients of the avocado, the shea and the centella asiatica are easy to burst and release in the prior art is solved, the stability of the active ingredients in the spinning and dyeing processes is improved, and the acting time is prolonged; meanwhile, the modified sodium alginate contains amide groups, which lays a foundation for subsequent cationic modification, and the positively charged quaternary ammonium groups can endow the nano particles with more excellent antibacterial property. The antibacterial loss rate (average value) of the regenerated cellulose fiber after dyeing is lower than 1 percent through inspection.
Description
Technical Field
The invention belongs to the technical field of regenerated cellulose fibers, and particularly relates to regenerated cellulose fibers containing nanometer particles of shea butter fruit extracts and a preparation method thereof.
Background
With the rapid development of social economy, the demands and requirements of people on textiles are continuously updated and improved, and more environment-friendly, multifunctional and high-quality fiber fabrics are gradually pursued. The regenerated cellulose fiber has wide application prospect in the textile field due to excellent softness, air permeability, hygroscopicity and antistatic property. On the other hand, sweat generated after people exercise easily causes bacteria to grow on the clothing fabric, and harm to physical health is caused to a certain extent. In this large background, a large number of regenerated cellulose fibers with antibacterial function appear on the market, and are mainly divided into two main categories: firstly, a layer of antibacterial finishing agent is coated on the surface of regenerated cellulose fiber to ensure that the regenerated cellulose fiber has an antibacterial effect, but the hand feeling of the fabric is greatly reduced, and the antibacterial durability is poor; the other is to add an antibacterial agent into the spinning dope to obtain the fiber with antibacterial function.
Among a plurality of antibacterial agents, the plant extract with the antibacterial effect is safe and environment-friendly, is suitable for various groups such as infants, the elderly and the like, and has good market acceptance. However, in the preparation process of regenerated cellulose fiber, the plant extract needs to pass through the processes of strong acid, strong alkali and high temperature for many times, so that the inactivation of the antibacterial active ingredient is easy to cause. Therefore, how to develop a multifunctional fiber and textile with durable antimicrobial efficacy by using green natural materials has become one of the focus of attention of researchers in recent years.
In the prior art, microcapsule encapsulation technology is mostly adopted to improve the stability of plant active ingredients in fibers, and the patent number of CN201310117692.3 is named as tea tree oil microcapsule antibacterial health care fibers and a preparation method thereof, which provides a microcapsule-containing fiber, emulsified tea tree oil is fully dispersed into a dispersion formed by wall materials by using a dispersing agent to prepare microcapsules, and then the microcapsules are added into the fibers; in the patent number CN201310140966.0 named as regenerated cellulose fiber with plant source antibacterial function and aromatic smell and its preparation process, peppermint oil is coated with beta-cyclodextrin via molecular embedding process to obtain peppermint oil microcapsule. However, most of microcapsules coated with the active ingredients are distributed on the surface of the fiber and are easily damaged in the subsequent dyeing process, so that the active ingredients are deactivated, and the antibacterial durability is reduced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides regenerated cellulose fibers containing nanometer particles of extracts of shea butter and a preparation method thereof, which realize the following aims:
1. the long-term stable coexistence of extracts of the avocado, the shea butter and the centella asiatica is realized, and the problem that the centella asiatica extract is easy to subside and separate out in the spinning solution in the prior art is solved;
2. the nanometer particles rich in the active ingredients of the avocado, the shea and the centella asiatica are prepared, have good sphericity, uniform particle size distribution and smooth surface, avoid the phenomenon that the nanometer particles are easy to agglomerate in the spinning solution, and enhance the controlled release effect on the active ingredients;
3. the prepared nano particles can be uniformly and stably dispersed on the surface and inside of the regenerated cellulose fiber, so that the problems that active ingredients in the avocado, the shea and the centella are easy to inactivate and lose in the dyeing process of the regenerated cellulose fiber are solved, and the dyed regenerated cellulose fiber has excellent antibacterial durability.
In order to solve the technical problems, one of the purposes of the invention is to provide regenerated cellulose fibers containing nanometer particles of extracts of shea butter and shea butter, and the preparation raw materials comprise the following components in percentage by mass: 5-15% of active nano particles and the balance of spinning solution.
As a preferable technical scheme of the invention, the active nano particles have a core-shell structure.
As a preferable technical scheme of the invention, the shell of the core-shell structure is modified sodium alginate, shea butter and shea butter extract, and the mass ratio of the modified sodium alginate, shea butter and shea butter extract is 1-2:0.2-0.8:0.6-1.4.
As a more preferable technical scheme of the invention, the mass ratio of the modified sodium alginate to the shea butter is 1.5:0.6:1.
as a preferable technical scheme of the invention, the nucleosome with the core-shell structure is centella asiatica extract, ginseng extract and rose extract, and the mass ratio of centella asiatica extract to ginseng extract to rose extract is 2-3:1-2:1.5-2.5.
The second object of the invention is to provide a preparation method of regenerated cellulose fiber containing nanometer particles of extracts of shea butter and shea butter, which comprises the following steps:
s1, preparing modified sodium alginate
S11: fully dissolving sodium alginate in distilled water, adding sodium periodate under the light-shielding condition of 20-30 ℃ and stirring for 2-6h, adding ethylene glycol for reaction for 1-2h, and obtaining oxidized sodium alginate after recrystallization and suction filtration;
s12: adding the oxidized sodium alginate prepared in the step S11 into a phosphate buffer solution, reacting with a nitrogen-containing organic compound and sodium cyanoborohydride for 6-10 hours, precipitating, centrifuging and drying to obtain the modified sodium alginate. After modifying the sodium alginate, the hydrophilicity of the sodium alginate is reduced, the polarity difference between the shell and the nucleosome is increased, the phenomenon that centella asiatica extract is easy to separate out in viscose spinning solution is avoided, and the problem that plant extract is easy to burst is solved; meanwhile, the modified sodium alginate contains amide groups, which lays a foundation for subsequent cationic modification, and the positively charged quaternary ammonium groups can endow the nano particles with more excellent antibacterial property.
Preferably, the nitrogen-containing organic compound in S12 is in a mass ratio of 0.2-0.8:0.5 to 1.5 of a mixture of adipodihydrazide and polyethylene glycol diamine; the average molecular weight of the polyethylene glycol diamine is 3000-7000.
Preferably, the mass ratio of sodium alginate to sodium periodate in the S11 is 4-6:1-3; the volume ratio of distilled water to glycol is 80-100:1.
preferably, in the step S12, the mass ratio of the oxidized sodium alginate to the nitrogen-containing organic compound to the sodium cyanoborohydride is 1.5-3.5:0.2-0.6:0.5-1.
S2, preparing active nano particles
S21: adding shea butter and shea butter extract into 75% ethanol water solution at 40-50deg.C, stirring to dissolve completely, adding modified sodium alginate, stirring for 40-80min at 500-800r/min to obtain homogeneous shell mixed solution;
s22: adding a modifying solution into the shell mixed solution in the step S21, and stirring and reacting for 30-60min at 40-60 ℃ to obtain a modified shell emulsion; the stirring reaction speed is 800-1000r/min;
s23: dissolving herba Centellae extract, ginseng radix extract, and flos Rosae Rugosae extract in distilled water, adding modifier, controlling the temperature of the reactor at 30-40deg.C, stirring at 1000-1500r/min, and reacting for 60-120min to obtain modified nucleosome emulsion;
s24: mixing the modified shell emulsion in the step S22 and the modified nucleosome emulsion in the step S23, performing ultrasonic treatment for 10-20min, adding an acetic acid solution of calcium chloride, adjusting the pH to 3.5-4.5, stirring for 1-3h at 20-60 ℃ at the stirring rate of 2500-3500r/min, and performing suction filtration, centrifugation and spray drying to obtain the active nano particles.
Preferably, the modified liquid in S22 comprises the following preparation raw materials in parts by weight: 3-5 parts of cetyl polyoxyethylene ether dimethyl octyl ammonium chloride, 1-2 parts of octyl polyoxyethylene decyl ammonium chloride and 30-50 parts of distilled water. Because the modified sodium alginate contains amide groups, positive cations are introduced into the modified sodium alginate after the modified sodium alginate is added into the modifying solution, the modified sodium alginate has more excellent adsorption effect with bacteria in the environment, and the antibacterial property of the nano particles is enhanced to a certain extent.
Preferably, the mass ratio of the modifier to the distilled water in the S23 is 0.1-1:90-120; the modifier is sodium abietate and sodium diisooctyl succinate, and the mass ratio of the sodium abietate to the sodium diisooctyl succinate is 2.4-3.2:1.6-2.
Preferably, the mass ratio of the modified shell emulsion to the modified nucleosome emulsion in the step S24 is 4-9:2-4; the frequency of the ultrasonic treatment is 30-35Hz, and the temperature is 20-40 ℃; the air inlet temperature of the spray drying is 120-150 ℃, and the air outlet temperature is 65-75 ℃.
Preferably, the mass concentration of the acetic acid solution of the calcium chloride in the S24 is 0.01-0.05g/mL.
S3, preparing a blending spinning solution
And (3) fully stirring the active nano particles prepared in the step (S24) and the viscose spinning stock solution at the rotating speed of 350-450r/min to obtain the blended spinning solution.
S4, spinning and forming
Filtering the blended spinning solution, passing through a spinning nozzle and a coagulating bath, and washing, desulfurizing, pickling and drying to obtain the regenerated cellulose fiber containing the nanometer particles of the extracts of the avocados and the shea.
Preferably, the concentration in the coagulation bath is: 60-90g/L of sulfuric acid, 20-60g/L of sodium sulfate, 50-70g/L of phosphoric acid and 20-40g/L of polyquaternium.
By adopting the technical scheme, the invention has the following technical effects:
1. the regenerated cellulose fiber containing the nanometer particles of the extracts of the avocados and the shea has excellent antibacterial property and hygroscopicity, the antibacterial rate of the regenerated cellulose fiber to staphylococcus aureus, escherichia coli and candida albicans is higher than 99 percent after washing for 100 times (FZ/T73023-2006), and the antibacterial rate to gram Lei Baishi bacteria of pneumonia is 96-99 percent (GB/T20944.3-2008); the regenerated cellulose fibers were left in an environment at 40℃and 90% RH for 4 hours, and the water content of the regenerated cellulose fibers was about 7%.
2. According to the invention, the sodium alginate is modified, so that the hydrophilicity of the sodium alginate is reduced, the polarity difference between the shell and the nucleosome is increased, the phenomenon that centella asiatica extract is easy to separate out in viscose spinning solution is avoided, the problem that active ingredients of the avocado, the shea and the centella asiatica are easy to burst in the prior art is solved, the stability of the active ingredients in the spinning and dyeing processes is improved, and the action time is prolonged; meanwhile, the modified sodium alginate contains amide groups, which lays a foundation for subsequent cationic modification, and the positively charged quaternary ammonium groups can endow the nano particles with more excellent antibacterial property.
3. According to the invention, the loading rate of the prepared active nano particles on centella asiatica extract, ginseng extract and rose extract is up to 95% by preparing the modified nucleosome emulsion, so that the problem that the aqueous nucleosome is not easy to coat in the prior art is solved, and the regenerated cellulose fiber is endowed with longer lasting and excellent antibacterial property, hygroscopicity and softness.
4. The active nano particles prepared by the invention have uniform particle size distribution, average particle size of 20-50nm, good sphericity and compactness, and can solve the problem of unstable spinning solution caused by easy agglomeration of nano particles in the prior art, and enhance the loading rate and the controlled release rate of extracts of the avocado, the shea and the centella.
5. The active nano particles prepared by the method have better compatibility with the viscose spinning solution, so that the dispersion uniformity of the nano particles in the viscose spinning solution is improved, the surface and the inside of the regenerated cellulose fiber are provided with the active nano particles, and the nano particles in the fiber can slowly release active ingredients in the subsequent dyeing and use processes, so that the inactivation and loss of the active ingredients are avoided, and the action time of the active ingredients is prolonged. The antibacterial loss rate (average value) of the regenerated cellulose fiber after dyeing is lower than 1 percent through inspection.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Example 1 regenerated cellulose fiber containing nanoparticles of extracts of avocado and shea and method for preparing the same
S1, preparing modified sodium alginate
S11: fully dissolving sodium alginate in distilled water, adding sodium periodate under the dark condition at 25 ℃ and stirring for 4 hours, adding ethylene glycol to react for 1.5 hours, and obtaining oxidized sodium alginate after recrystallization and suction filtration;
the mass ratio of the sodium alginate to the sodium periodate is 5:2; the volume ratio of distilled water to ethylene glycol is 90:1.
s12: and (3) adding the oxidized sodium alginate prepared in the step (S11) into a phosphate buffer solution, reacting with a nitrogen-containing organic compound and sodium cyanoborohydride for 8 hours, and performing precipitation, centrifugation and drying to obtain the modified sodium alginate. After modifying the sodium alginate, the hydrophilicity of the sodium alginate is reduced, the polarity difference between the shell and the nucleosome is increased, the phenomenon that centella asiatica extract is easy to separate out in viscose spinning solution is avoided, and the problem that plant extract is easy to burst is solved; meanwhile, the modified sodium alginate contains amide groups, which lays a foundation for subsequent cationic modification, and the positively charged quaternary ammonium groups can endow the nano particles with more excellent antibacterial property;
the mass ratio of the nitrogen-containing organic compound is 0.6:1 adipoyl dihydrazide and polyethylene glycol diamine; the average molecular weight of the polyethylene glycol diamine is 5000;
the mass ratio of the oxidized sodium alginate to the nitrogen-containing organic compound to the cyano sodium borohydride is 2.5:0.4:0.7.
s2, preparing active nano particles
S21: adding shea butter and shea butter extract into 75% ethanol water solution at 45deg.C, stirring to dissolve completely, adding modified sodium alginate, stirring for 60min at 700r/min to obtain homogeneous shell mixed solution;
the mass ratio of the modified sodium alginate to the shea butter extract is 1.5:0.5:1.
s22: adding a modifying solution into the shell mixed solution in the step S21, and stirring and reacting for 45min at 50 ℃ to obtain a modified shell emulsion; the stirring reaction speed is 900r/min;
the modified liquid comprises the following raw materials in parts by weight: 4 parts of cetyl polyoxyethylene ether dimethyl octyl ammonium chloride, 1.5 parts of octyl polyoxyethylene decyl ammonium chloride and 40 parts of distilled water.
S23: dissolving herba Centellae extract, ginseng radix extract, and flos Rosae Rugosae extract in distilled water, adding modifier, controlling the temperature of the reactor at 35deg.C, stirring at 1200r/min, and reacting for 90min to obtain modified nucleosome emulsion;
the mass ratio of the centella asiatica extract to the ginseng extract to the rose extract is 2.5:1.5:2;
the mass ratio of the modifier to distilled water is 0.6:110; the modifier is sodium abietate and sodium diisooctyl succinate, and the mass ratio of the sodium abietate to the sodium diisooctyl succinate is 2.8:1.8.
s24: mixing the modified shell emulsion in the step S22 and the modified nuclear emulsion in the step S23, performing ultrasonic treatment for 10-20min, adding an acetic acid solution of calcium chloride, adjusting the pH to 4, stirring for 2h at 40 ℃ at the stirring rate of 2800r/min, and performing suction filtration, centrifugation and spray drying to obtain active nano particles;
the mass ratio of the modified shell emulsion to the modified nucleosome emulsion is 7:3, a step of; the frequency of the ultrasonic treatment is 30Hz, and the temperature is 30 ℃; the air inlet temperature of the spray drying is 135 ℃, and the air outlet temperature is 70 ℃.
The mass concentration of the acetic acid solution of the calcium chloride is 0.03g/mL.
S3, preparing a blending spinning solution
And (3) fully stirring the active nano particles prepared in the step (S24) and the viscose spinning stock solution at the rotating speed of 400r/min to obtain the blended spinning solution.
The active nano particles account for 15% of the blending spinning solution, and the balance is the viscose spinning solution.
S4, spinning and forming
Filtering the blended spinning solution, passing through a spinning nozzle and a coagulating bath, and washing, desulfurizing, pickling and drying to obtain the regenerated cellulose fiber containing the nanometer particles of the extracts of the avocados and the shea.
The concentration in the coagulation bath is: 80g/L of sulfuric acid, 40g/L of sodium sulfate, 60g/L of phosphoric acid and 7-30 g/L of polyquaternium.
The regenerated cellulose fiber containing the nanometer particles of the extracts of the avocados and the shea fruits prepared in the example 1 has excellent antibacterial property and hygroscopicity, and after 100 times of water washing, the antibacterial rate of the regenerated cellulose fiber to staphylococcus aureus is 99.8%, the antibacterial rate to escherichia coli is 99.6%, the antibacterial rate to candida albicans is 99.7%, and the antibacterial rate to Lei Baishi bacteria of pneumonia is 99%; the bacteriostatic loss rate (average value) of the regenerated cellulose fiber after dyeing is 0.36%; the regenerated cellulose fiber was placed in an environment of 40 ℃ and 90% rh for 4 hours, and the water content of the regenerated cellulose fiber was 7.5%.
Example 2 regenerated cellulose fiber containing nanoparticles of extracts of avocado and shea and method for preparing the same
S1, preparing modified sodium alginate
S11: fully dissolving sodium alginate in distilled water, adding sodium periodate under the dark condition at 20 ℃ and stirring for 6 hours, adding ethylene glycol for reaction for 1 hour, and obtaining oxidized sodium alginate after recrystallization and suction filtration;
the mass ratio of the sodium alginate to the sodium periodate is 4:1, a step of; the volume ratio of distilled water to glycol is 80:1.
s12: and (3) adding the oxidized sodium alginate prepared in the step (S11) into a phosphate buffer solution, reacting for 6 hours with a nitrogen-containing organic compound and sodium cyanoborohydride, and performing precipitation, centrifugation and drying to obtain the modified sodium alginate. After modifying the sodium alginate, the hydrophilicity of the sodium alginate is reduced, the polarity difference between the shell and the nucleosome is increased, the phenomenon that centella asiatica extract is easy to separate out in viscose spinning solution is avoided, and the problem that plant extract is easy to burst is solved; meanwhile, the modified sodium alginate contains amide groups, which lays a foundation for subsequent cationic modification, and the positively charged quaternary ammonium groups can endow the nano particles with more excellent antibacterial property;
the mass ratio of the nitrogen-containing organic compound is 0.2:0.5 of a mixture of adipoyl dihydrazide and polyethylene glycol diamine; the average molecular weight of the polyethylene glycol diamine is 3000;
the mass ratio of the oxidized sodium alginate to the nitrogen-containing organic compound to the cyano sodium borohydride is 1.5:0.2:0.5.
s2, preparing active nano particles
S21: adding shea butter and shea butter extract into 75% ethanol water solution at 40deg.C, stirring to dissolve completely, adding modified sodium alginate, stirring for 80min at 500r/min to obtain homogeneous shell mixed solution;
the mass ratio of the modified sodium alginate to the shea butter extract is 1:0.2:0.6.
s22: adding a modifying solution into the shell mixed solution in the step S21, and stirring and reacting for 30min at 40 ℃ to obtain a modified shell emulsion; the stirring reaction speed is 1000r/min;
the modified liquid comprises the following raw materials in parts by weight: 3 parts of cetyl polyoxyethylene ether dimethyl octyl ammonium chloride, 1 part of octyl polyoxyethylene decyl ammonium chloride and 30 parts of distilled water.
S23: dissolving herba Centellae extract, ginseng radix extract, and flos Rosae Rugosae extract in distilled water, adding modifier, controlling the temperature of the reactor at 30deg.C, stirring at 1500r/min, and reacting for 60min to obtain modified nucleosome emulsion;
the mass ratio of the centella asiatica extract to the ginseng extract to the rose extract is 2:1:1.5;
the mass ratio of the modifier to distilled water is 0.1:90; the modifier is sodium abietate and sodium diisooctyl succinate, and the mass ratio of the sodium abietate to the sodium diisooctyl succinate is 2.4:1.6.
s24: mixing the modified shell emulsion in the step S22 and the modified nuclear emulsion in the step S23, performing ultrasonic treatment for 10min, adding an acetic acid solution of calcium chloride, adjusting the pH to 3.5, stirring for 3h at 20 ℃ at the stirring rate of 3500r/min, and performing suction filtration, centrifugation and spray drying to obtain active nano particles;
the mass ratio of the modified shell emulsion to the modified nucleosome emulsion is 4:2; the frequency of the ultrasonic treatment is 35Hz, and the temperature is 20 ℃; the air inlet temperature of the spray drying is 120 ℃, and the air outlet temperature is 65 ℃.
The mass concentration of the acetic acid solution of the calcium chloride is 0.01g/mL.
S3, preparing a blending spinning solution
And (3) fully stirring the active nano particles prepared in the step (S24) and the viscose spinning stock solution at the rotating speed of 350r/min to obtain the blended spinning solution.
The active nano particles account for 5% of the blending spinning solution, and the balance is the viscose spinning solution.
S4, spinning and forming
Filtering the blended spinning solution, passing through a spinning nozzle and a coagulating bath, and washing, desulfurizing, pickling and drying to obtain the regenerated cellulose fiber containing the nanometer particles of the extracts of the avocados and the shea.
The concentration in the coagulation bath is: 60g/L sulfuric acid, 20g/L sodium sulfate, 70g/L phosphoric acid and 7.40 g/L polyquaternium.
The regenerated cellulose fiber containing the nanometer particles of the extracts of the avocados and the shea fruits prepared in the example 1 has excellent antibacterial property and hygroscopicity, and after 100 times of water washing, the antibacterial rate of the regenerated cellulose fiber to staphylococcus aureus is 99.2%, the antibacterial rate to escherichia coli is 99.3%, the antibacterial rate to candida albicans is 99.1%, and the antibacterial rate to Lei Baishi bacteria of pneumonia is 96%; the bacteriostatic loss rate (average value) of the regenerated cellulose fiber after dyeing is 0.62%; the regenerated cellulose fiber was placed in an environment of 40 ℃ and 90% rh for 4 hours, and the water content of the regenerated cellulose fiber was 6.6%.
Example 3 regenerated cellulose fiber containing nanoparticles of extracts of avocado and shea and method for preparing the same
S1, preparing modified sodium alginate
S11: fully dissolving sodium alginate in distilled water, adding sodium periodate under the light-shielding condition at 30 ℃ and stirring for 2 hours, adding ethylene glycol for reaction for 2 hours, and obtaining oxidized sodium alginate after recrystallization and suction filtration;
the mass ratio of the sodium alginate to the sodium periodate is 6:3, a step of; the volume ratio of distilled water to glycol is 100:1.
s12: and (3) adding the oxidized sodium alginate prepared in the step (S11) into a phosphate buffer solution, reacting with a nitrogen-containing organic compound and sodium cyanoborohydride for 10 hours, and then precipitating, centrifuging and drying to obtain the modified sodium alginate. After modifying the sodium alginate, the hydrophilicity of the sodium alginate is reduced, the polarity difference between the shell and the nucleosome is increased, the phenomenon that centella asiatica extract is easy to separate out in viscose spinning solution is avoided, and the problem that plant extract is easy to burst is solved; meanwhile, the modified sodium alginate contains amide groups, which lays a foundation for subsequent cationic modification, and the positively charged quaternary ammonium groups can endow the nano particles with more excellent antibacterial property;
the mass ratio of the nitrogen-containing organic compound is 0.8:1.5 mixtures of adipoyl dihydrazide and polyethylene glycol diamine; the average molecular weight of the polyethylene glycol diamine is 7000;
the mass ratio of the oxidized sodium alginate to the nitrogen-containing organic compound to the cyano sodium borohydride is 3.5:0.6:1.
s2, preparing active nano particles
S21: adding shea butter and shea butter extract into 75% ethanol water solution at 50deg.C, stirring to dissolve completely, adding modified sodium alginate, stirring for 40min at 800r/min to obtain homogeneous shell mixed solution;
the mass ratio of the modified sodium alginate to the shea butter extract is 2:0.8:1.4.
s22: adding a modifying solution into the shell mixed solution in the step S21, and stirring and reacting for 60min at the temperature of 60 ℃ to obtain a modified shell emulsion; the stirring reaction speed is 800r/min;
the modified liquid comprises the following raw materials in parts by weight: 5 parts of cetyl polyoxyethylene ether dimethyl octyl ammonium chloride, 2 parts of octyl polyoxyethylene decyl ammonium chloride and 50 parts of distilled water.
S23: dissolving herba Centellae extract, ginseng radix extract, and flos Rosae Rugosae extract in distilled water, adding modifier, controlling the temperature of the reactor at 40deg.C, stirring at 1000r/min, and reacting for 120min to obtain modified nucleosome emulsion;
the mass ratio of the centella asiatica extract to the ginseng extract to the rose extract is 3:2:2.5;
the mass ratio of the modifier to the distilled water is 1:120; the modifier is sodium abietate and sodium diisooctyl succinate, and the mass ratio of the sodium abietate to the sodium diisooctyl succinate is 3.2:2.
s24: mixing the modified shell emulsion in the step S22 and the modified nuclear emulsion in the step S23, performing ultrasonic treatment for 20min, adding an acetic acid solution of calcium chloride, adjusting the pH to 4.5, stirring for 1h at 60 ℃ at the stirring rate of 2500r/min, and performing suction filtration, centrifugation and spray drying to obtain active nano particles;
the mass ratio of the modified shell emulsion to the modified nucleosome emulsion is 9:4, a step of; the frequency of the ultrasonic treatment is 35Hz, and the temperature is 40 ℃; the air inlet temperature of the spray drying is 150 ℃, and the air outlet temperature is 75 ℃.
The mass concentration of the acetic acid solution of the calcium chloride is 0.05g/mL.
S3, preparing a blending spinning solution
And (3) fully stirring the active nano particles prepared in the step (S24) and the viscose spinning stock solution at the rotating speed of 450r/min to obtain the blended spinning solution.
The active nano particles account for 10% of the blending spinning solution, and the balance is the viscose spinning solution.
S4, spinning and forming
Filtering the blended spinning solution, passing through a spinning nozzle and a coagulating bath, and washing, desulfurizing, pickling and drying to obtain the regenerated cellulose fiber containing the nanometer particles of the extracts of the avocados and the shea.
The concentration in the coagulation bath is: 90g/L of sulfuric acid, 60g/L of sodium sulfate, 50g/L of phosphoric acid and 7 g/L of polyquaternium.
The regenerated cellulose fiber containing the nanometer particles of the extracts of the avocado and the shea prepared in the example 1 has excellent antibacterial property and hygroscopicity, and after 100 times of water washing, the antibacterial rate of the regenerated cellulose fiber to staphylococcus aureus is 99.6%, the antibacterial rate to escherichia coli is 99.5%, the antibacterial rate to candida albicans is 99.3%, and the antibacterial rate to Lei Baishi bacteria of pneumonia is 97.8%; the bacteriostatic loss rate (average value) of the regenerated cellulose fiber after dyeing is 0.36%; the regenerated cellulose fiber was placed in an environment of 40 ℃ and 90% rh for 4 hours, and the water content of the regenerated cellulose fiber was 7.1%.
The loading rate of the active nano particles prepared in the examples 1-3 on centella asiatica extract, ginseng extract and rose extract is up to 95%, so that the problem that the water-based nucleus is not easy to coat in the prior art is solved, and the regenerated cellulose fiber is endowed with longer lasting and excellent antibacterial property, hygroscopicity and softness; the prepared active nano particles have uniform particle size distribution, the average particle size can reach 20-50nm, and the active nano particles have good sphericity and compactness, so that the problem of unstable spinning solution caused by easy agglomeration of nano particles in the prior art is solved, and the loading rate and the controlled release rate of extracts of the avocado, the shea butter and the centella asiatica are enhanced.
Comparative example 1
The representative example 1 is selected, the step of S1 for preparing modified sodium alginate is removed, sodium alginate is directly added into S21 for preparing a shell mixed solution, the rest is identical with the example 1, as comparative example 1, the phenomenon that centella asiatica extract is easy to separate out in viscose spinning solution occurs during blending, meanwhile, the antibacterial effect of the prepared regenerated cellulose fiber is not durable, the active ingredient of the extract is easy to burst, the antibacterial loss rate (average value) of the regenerated cellulose fiber after dyeing is 28%, the antibacterial rate of the regenerated cellulose fiber after washing for 100 times is 72% for staphylococcus aureus, the antibacterial rate of the regenerated cellulose fiber for escherichia coli is 74%, the antibacterial rate for candida albicans is 75%, the antibacterial rate for Lei Baishi bacteria of pneumonia is 70%, and the antibacterial effect is greatly reduced.
Comparative example 1 illustrates that after sodium alginate is modified, the hydrophilicity of the sodium alginate is reduced, the polarity difference between the shell and the nucleosome is increased, the phenomenon that centella asiatica extract is easy to separate out in viscose spinning solution is avoided, the problem that active ingredients of the avocado, the shea and the centella asiatica are easy to burst and release in the prior art is solved, the stability of the active ingredients in the spinning and dyeing processes is improved, and the action time is prolonged.
Comparative example 2
Representative example 1 was selected, the modifier added in S23 was removed, and the rest was the same as example 1, and as comparative example 2, the loading ratio of the prepared active nanoparticle to centella asiatica extract, ginseng extract and rose extract was 61%, which means that the addition of the modifier solves the problem that the aqueous nucleus is not easily coated in the prior art, increases the loading ratio to the extract, and imparts longer lasting, excellent antibacterial property, hygroscopicity and softness to regenerated cellulose fiber.
The proportions are mass proportions, and the percentages are mass percentages, unless otherwise specified; the raw materials are all commercially available.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The regenerated cellulose fiber containing the nanometer particles of the extracts of the avocados and the shea is characterized by comprising the following raw materials in percentage by mass: 5-15% of active nano particles, and the balance of spinning solution;
the active nano particles are of a core-shell structure;
the shell of the core-shell structure is modified sodium alginate, shea butter and shea butter extract, and the mass ratio of the modified sodium alginate to the shea butter extract is 1-2:0.2-0.8:0.6-1.4;
the nucleosome with the core-shell structure is centella asiatica extract, ginseng extract and rose extract, and the mass ratio of centella asiatica extract to ginseng extract to rose extract is 2-3:1-2:1.5-2.5;
the preparation method of the regenerated cellulose fiber containing the nanometer particles of the avocado and the shea extract comprises the steps of preparing modified sodium alginate, preparing active nanometer particles, preparing blending spinning solution and spinning and forming;
the preparation of the modified sodium alginate comprises the following steps:
s11: fully dissolving sodium alginate in distilled water, adding sodium periodate under the light-shielding condition of 20-30 ℃ and stirring for 2-6h, adding ethylene glycol for reaction for 1-2h, and obtaining oxidized sodium alginate after recrystallization and suction filtration;
s12: adding the oxidized sodium alginate prepared in the step S11, a nitrogen-containing organic compound and sodium cyanoborohydride into a phosphate buffer solution, reacting for 6-10h, precipitating, centrifuging and drying to obtain the modified sodium alginate;
the preparation of the active nanoparticle comprises the following steps:
s21: adding shea butter and shea butter extract into 75% ethanol water solution at 40-50deg.C, stirring to dissolve completely, adding modified sodium alginate, stirring for 40-80min at 500-800r/min to obtain homogeneous shell mixed solution;
s22: adding a modifying solution into the shell mixed solution in the step S21, and stirring and reacting for 30-60min at 40-60 ℃ to obtain a modified shell emulsion; the stirring reaction speed is 800-1000r/min;
s23: dissolving herba Centellae extract, ginseng radix extract, and flos Rosae Rugosae extract in distilled water, adding modifier, controlling the temperature of the reactor at 30-40deg.C, stirring at 1000-1500r/min, and reacting for 60-120min to obtain modified nucleosome emulsion;
s24: mixing the modified shell emulsion in the step S22 and the modified nucleosome emulsion in the step S23, performing ultrasonic treatment for 10-20min, adding an acetic acid solution of calcium chloride, adjusting the pH to 3.5-4.5, stirring for 1-3h at 20-60 ℃ at the stirring rate of 2500-3500r/min, and performing suction filtration, centrifugation and spray drying to obtain active nano particles;
the modified liquid in the step S22 comprises the following raw materials in parts by weight: 3-5 parts of cetyl polyoxyethylene ether dimethyl octyl ammonium chloride, 1-2 parts of octyl polyoxyethylene decyl ammonium chloride and 30-50 parts of distilled water.
2. The regenerated cellulose fiber containing nanometer particles of avocado and shea extract according to claim 1, wherein the mass ratio of sodium alginate to sodium periodate in S11 is 4-6:1-3; the volume ratio of the distilled water to the glycol is 80-100:1.
3. the regenerated cellulose fiber containing nanometer particles of avocado and shea extract according to claim 1, wherein the mass ratio of oxidized sodium alginate, nitrogen-containing organic compound and sodium cyanoborohydride in S12 is 1.5-3.5:0.2-0.6:0.5-1; the mass ratio of the nitrogen-containing organic compound is 0.2-0.8:0.5 to 1.5 of a mixture of adipodihydrazide and polyethylene glycol diamine; the average molecular weight of the polyethylene glycol diamine is 3000-7000.
4. The regenerated cellulose fiber containing nano particles of avocado and shea extract according to claim 1, wherein the mass ratio of modifier and distilled water in S23 is 0.1-1:90-120; the modifier is sodium abietate and sodium diisooctyl succinate, and the mass ratio of the sodium abietate to the sodium diisooctyl succinate is 2.4-3.2:1.6-2.
5. The regenerated cellulose fiber containing nano particles of avocado and shea extract according to claim 1, wherein the mass ratio of modified shell emulsion to modified nucleosome emulsion in S24 is 4-9:2-4; the frequency of the ultrasonic treatment is 30-35Hz, and the temperature is 20-40 ℃; the air inlet temperature of the spray drying is 120-150 ℃, and the air outlet temperature is 65-75 ℃;
the mass concentration of the acetic acid solution of the calcium chloride is 0.01-0.05g/mL.
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