CN116397436A - Linen softening finishing method - Google Patents
Linen softening finishing method Download PDFInfo
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- CN116397436A CN116397436A CN202310432844.2A CN202310432844A CN116397436A CN 116397436 A CN116397436 A CN 116397436A CN 202310432844 A CN202310432844 A CN 202310432844A CN 116397436 A CN116397436 A CN 116397436A
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- linen
- softening
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- finishing
- drying
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000004744 fabric Substances 0.000 claims abstract description 43
- OUYCCCASQSFEME-QMMMGPOBSA-N L-tyrosine Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-QMMMGPOBSA-N 0.000 claims abstract description 19
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 claims abstract description 19
- 108010029541 Laccase Proteins 0.000 claims abstract description 15
- 108010001336 Horseradish Peroxidase Proteins 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 13
- 108010059892 Cellulase Proteins 0.000 claims abstract description 12
- 229940106157 cellulase Drugs 0.000 claims abstract description 12
- 102000004190 Enzymes Human genes 0.000 claims description 24
- 108090000790 Enzymes Proteins 0.000 claims description 24
- 229940088598 enzyme Drugs 0.000 claims description 24
- 238000002360 preparation method Methods 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 23
- 238000005406 washing Methods 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 18
- 239000001301 oxygen Substances 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 239000007853 buffer solution Substances 0.000 claims description 10
- 230000035484 reaction time Effects 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 6
- 238000007730 finishing process Methods 0.000 claims description 6
- 229910020820 NaAc-HAc Inorganic materials 0.000 claims description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 3
- 150000003254 radicals Chemical class 0.000 claims description 3
- 230000035899 viability Effects 0.000 claims 3
- 239000004753 textile Substances 0.000 abstract description 6
- 239000002262 Schiff base Substances 0.000 abstract description 3
- 150000004753 Schiff bases Chemical class 0.000 abstract description 3
- 238000007710 freezing Methods 0.000 abstract description 3
- 230000008014 freezing Effects 0.000 abstract description 3
- 238000010257 thawing Methods 0.000 abstract description 2
- 238000004132 cross linking Methods 0.000 abstract 1
- 241000208202 Linaceae Species 0.000 description 27
- 235000004431 Linum usitatissimum Nutrition 0.000 description 27
- 230000000694 effects Effects 0.000 description 24
- 235000013824 polyphenols Nutrition 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000835 fiber Substances 0.000 description 7
- 239000013078 crystal Substances 0.000 description 6
- 150000008442 polyphenolic compounds Chemical class 0.000 description 6
- 229920002678 cellulose Polymers 0.000 description 5
- 239000001913 cellulose Substances 0.000 description 5
- -1 polyphenol compounds Chemical class 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000007598 dipping method Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methyl-cyclopentane Natural products CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 125000003172 aldehyde group Chemical group 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229940079919 digestives enzyme preparation Drugs 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 208000003251 Pruritus Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000002563 ionic surfactant Substances 0.000 description 1
- 230000007803 itching Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/402—Amides imides, sulfamic acids
- D06M13/425—Carbamic or thiocarbamic acids or derivatives thereof, e.g. urethanes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/35—Heterocyclic compounds
- D06M13/355—Heterocyclic compounds having six-membered heterocyclic rings
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
- D06M16/003—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic with enzymes or microorganisms
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/20—Treatment influencing the crease behaviour, the wrinkle resistance, the crease recovery or the ironing ease
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/50—Modified hand or grip properties; Softening compositions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The invention belongs to the field of textile engineering, and discloses a softening finishing method of linen fabric, which comprises the steps of repeatedly freezing and thawing the linen fabric, adding acid cellulase, laccase and horseradish peroxidase, and using tyrosine for grafting and crosslinking to form Schiff base. After finishing the linen fabric by adopting the method provided by the invention, the softness and crease resistance are obviously increased.
Description
Technical Field
The invention belongs to the field of textile engineering, and particularly relates to a linen softening and finishing method.
Background
Flax is an important raw material of clothing fabrics in the hemp textile industry, and the fiber is strong, soft and fine and has better color. The flax fiber has the unique advantages of high strength, difficult decay in water, waterproof effect, friction resistance, high temperature resistance, fast heat dissipation, low dust collection rate, difficult tearing, difficult combustion, no static electricity, high acid and alkali resistance and the like, is a preferred textile material pursuing green and environment protection, and is known as 'queen' in natural fibers. However, the fabrics have poor softness, coarse and hard hand feeling, easy wrinkling and itching feeling, and influence the wearability to a certain extent.
Disclosure of Invention
In view of the above, the present invention aims to provide a linen softening finishing method, which can significantly increase softness and crease resistance after finishing linen.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a linen softening and finishing method comprising the steps of:
s1: washing and drying the linen fabric, then carrying out two-round liquid nitrogen and alkali water bath in sequence, and then washing and drying; the method comprises the steps of sequentially carrying out two rounds of liquid nitrogen and alkaline water leaching baths, specifically adopting the alkaline water leaching bath after liquid nitrogen treatment, and then sequentially carrying out the liquid nitrogen and the alkaline water leaching baths;
s2: and (3) putting the linen fabric in the step (S1) into NaAc-HAc buffer solution containing tyrosine and mixed enzyme preparation, performing a first-stage reaction, putting 2, 6-tetramethyl-1-piperidyloxy free radical into the solution, continuously introducing oxygen into the solution, performing a second-stage reaction, washing with water, and drying.
Preferably, in the step S1, the alkaline water is sodium hydroxide or potassium hydroxide solution, the concentration is 50-60g/L, and the temperature is 85-95 ℃.
Preferably, in the step S2, the mixed enzyme preparation is prepared by mixing acid cellulase, laccase and horseradish peroxidase in a mass ratio of 1:2 (0.01-0.05).
The preferable activities of the acid cellulase, laccase and horseradish peroxidase in the mixed enzyme preparation are 80000-100000U/g, 10000-20000U/g and 240000-300000U/g respectively.
Preferably, in step S2, the pH value of the NaAc-HAc buffer solution ranges from 4.0 to 5.0, and the concentration ranges from 0.1 to 0.12mol/L.
Preferably, in the step S2, the dosages of the tyrosine and the mixed enzyme preparation are respectively 0.065-0.074g/g linen and 0.23-0.45g/g linen.
Preferably, in the step S2, the dosage of the 2, 6-tetramethyl-1-piperidyloxy free radical is 0.05-0.08g/g of linen.
Preferably, in step S2, the ventilation of the oxygen is 0.5-0.8V/(v·min).
Preferably, in step S2, the reaction temperature of the first stage is 30-37 ℃ and the reaction time is 12-24h.
Preferably, in step S2, the reaction temperature of the second stage is 35-40 ℃ and the reaction time is 6-12h.
Compared with the prior art, the finishing method of the invention combines repeated quick freezing and alkali boiling to crush the large crystal area inside the cellulose by the generated ice crystals to generate small crystal areas, and then uses tyrosine to oxidize by the monooxygenation and dioxygenation of laccase and horseradish peroxidase to form polyphenol compounds as grafted polymer groups to be embedded into cracks on the surface of the linen fabric and gaps of the small crystal areas, so that the friction force between fibers is reduced, and the softness and crease resistance are obviously improved. In addition, covalent bonding of the polyphenol compound and cellulose is that aldehyde groups are generated by cellulose oxidation of laccase/TEMPO and amino groups on the polyphenol compound react to generate Schiff base. The polyphenol compound also keeps a large amount of amino and carboxyl due to tyrosine, so that the surface of the flax fiber also shows the property of the polyphenol ampholytic surfactant, and the softening finishing effect is further improved.
Detailed Description
The invention will be better understood from the following examples. However, it will be readily appreciated by those skilled in the art that the description of the embodiments is provided for illustration only and should not limit the invention as described in detail in the claims.
Example 1
A linen softening and finishing method comprising the steps of:
1. washing and drying flax fabrics, performing liquid nitrogen treatment, then adopting a 92 ℃ 54g/L sodium hydroxide solution for dipping, sequentially performing liquid nitrogen and 92 ℃ 54g/L sodium hydroxide solution for dipping, and then washing and drying;
2. mixing acid cellulase with activity of 92000U/g, laccase with activity of 16000U/g and horseradish peroxidase with activity of 280000U/g according to mass ratio of 1:2:0.04 to obtain a mixed enzyme preparation;
3. the flax fabric in the step 1 is put into 0.11mol/LNaAc-HAc buffer solution with pH4.5 and containing tyrosine and mixed enzyme preparation, the dosages of the tyrosine and the mixed enzyme preparation are respectively 0.07g/g flax fabric and 0.4g/g flax fabric, the first-stage reaction is carried out, the temperature is 32 ℃, the reaction time is 18 hours, then, 2, 6-tetramethyl-1-piperidine oxygen free radical of 0.07g/g flax fabric is put into the solution, the ventilation rate is 0.6V/(V.min), the second-stage reaction is carried out, the temperature is 37 ℃, the reaction time is 10 hours, and finally, the water washing and the drying are carried out.
Example 2
A linen softening and finishing method comprising the steps of:
1. washing and drying the linen fabric, then carrying out two rounds of liquid nitrogen and 60g/L potassium hydroxide solution at 85 ℃ for bathing, and then washing and drying;
2. mixing acid cellulase with activity of 100000U/g, laccase with activity of 10000U/g and horseradish peroxidase with activity of 300000U/g according to a mass ratio of 1:2:0.01 to prepare a mixed enzyme preparation;
3. the flax fabric in the step 1 is put into 0.1mol/L NaAc-HAc buffer solution with pH of 4.0 and containing tyrosine and mixed enzyme preparation, the dosages of the tyrosine and the mixed enzyme preparation are respectively 0.065g/g flax fabric and 0.45g/g flax fabric, the first-stage reaction is carried out, the temperature is 30 ℃, the reaction time is 24 hours, then, 2, 6-tetramethyl-1-piperidine oxygen free radical of 0.05g/g flax fabric is put into the solution, oxygen is continuously introduced into the solution, the ventilation rate is 0.5V/(V.min), the second-stage reaction is carried out, the temperature is 40 ℃, the reaction time is 6 hours, and finally, the water washing and the drying are carried out.
Example 3
A linen softening and finishing method comprising the steps of:
1. washing and drying the linen fabric, then carrying out two rounds of liquid nitrogen and 50g/L sodium hydroxide solution bath at the temperature of 95 ℃ in sequence, and then washing and drying;
2. mixing acid cellulase with activity of 80000U/g, laccase with activity of 20000U/g and horseradish peroxidase with activity of 240000U/g according to a mass ratio of 1:2:0.05 to prepare a mixed enzyme preparation;
3. the flax fabric in the step 1 is put into 0.12mol/LNaAc-HAc buffer solution with pH5.0 and containing tyrosine and mixed enzyme preparation, the dosages of the tyrosine and the mixed enzyme preparation are respectively 0.074g/g flax fabric and 0.23g/g flax fabric, the first-stage reaction is carried out, the temperature is 37 ℃ and the reaction time is 12 hours, then 2, 6-tetramethyl-1-piperidine oxygen free radical of 0.08g/g flax fabric is put into the solution, oxygen is continuously introduced into the solution, the ventilation volume is 0.8V/(V.min), the second-stage reaction is carried out, the temperature is 35 ℃, the reaction time is 12 hours, and finally water washing and drying are carried out.
Comparative example 1 (without freeze thawing)
A linen softening and finishing method comprising the steps of:
1. mixing acid cellulase with activity of 92000U/g, laccase with activity of 16000U/g and horseradish peroxidase with activity of 280000U/g according to mass ratio of 1:2:0.04 to obtain a mixed enzyme preparation;
2. washing and drying flax fabrics, putting the flax fabrics into 0.11mol/LNaAc-HAc buffer solution with pH of 4.5 and containing tyrosine and mixed enzyme preparations, wherein the dosages of the tyrosine and the mixed enzyme preparations are respectively 0.07g/g flax fabrics and 0.4g/g flax fabrics, carrying out a first-stage reaction at the temperature of 32 ℃ for 18 hours, then putting 2, 6-tetramethyl-1-piperidine oxygen free radical of 0.07g/g flax fabrics, continuously introducing oxygen into the solution, and carrying out a second-stage reaction at the temperature of 37 ℃ for 10 hours, and finally washing and drying.
Comparative example 2 (no TEMPO)
A linen softening and finishing method comprising the steps of:
1. washing and drying the linen fabric, then carrying out two rounds of liquid nitrogen and 54g/L sodium hydroxide solution at 92 ℃ for dipping, and then washing and drying;
2. mixing acid cellulase with activity of 92000U/g, laccase with activity of 16000U/g and horseradish peroxidase with activity of 280000U/g according to mass ratio of 1:2:0.04 to obtain a mixed enzyme preparation;
3. the flax fabric in the step 1 is put into 0.11mol/LNaAc-HAc buffer solution with pH4.5 and containing tyrosine and mixed enzyme preparation, the dosages of the tyrosine and the mixed enzyme preparation are respectively 0.07g/g flax fabric and 0.4g/g flax fabric, the first-stage reaction is carried out at the temperature of 32 ℃ for 18 hours, then oxygen is continuously introduced into the solution, the ventilation rate is 0.6V/(V.min), the second-stage reaction is carried out at the temperature of 37 ℃ for 10 hours, and finally water washing and drying are carried out.
Comparative example 3 (tyrosine-free)
A linen softening and finishing method comprising the steps of:
1. washing and drying the linen fabric, then carrying out two rounds of liquid nitrogen and 54g/L sodium hydroxide solution at 92 ℃ for dipping, and then washing and drying;
2. mixing acid cellulase with activity of 92000U/g, laccase with activity of 16000U/g and horseradish peroxidase with activity of 280000U/g according to mass ratio of 1:2:0.04 to obtain a mixed enzyme preparation;
3. the flax fabric in the step 1 is put into 0.11mol/LNaAc-HAc buffer solution with pH4.5 and containing mixed enzyme preparation, the dosage of the mixed enzyme preparation is 0.4g/g flax fabric respectively, the first-stage reaction is carried out at the temperature of 32 ℃ for 18 hours, then the 2, 6-tetramethyl-1-piperidine oxygen free radical of 0.07g/g flax fabric is put into the solution, oxygen is continuously introduced into the solution, the ventilation volume is 0.6V/(V.min), the second-stage reaction is carried out at the temperature of 37 ℃ for 10 hours, and finally the water washing and drying are carried out.
Crease recovery angle test
The crease recovery angle of linen before and after finishing was measured by YG (B) 541E intelligent fabric crease elastometer according to GB/T3819-1997 method for measuring recovery angle of crease recovery of textile fabrics, and the results are shown in Table 1.
TABLE 1
As can be seen from table 1, the crease recovery angle of the linen treated by the finishing method of the present invention is significantly reduced. Comparative example 1 did not disrupt the large crystal area, and neither the enzyme preparation nor the surface-modified molecule could penetrate into the fiber core. Comparative example 2 did not oxidize the free hydroxyl groups of cellulose and could not form schiff bases with the polyphenol, and although the polyphenol could go deep into the fiber core during the finishing process, no covalent bonding was achieved and a stable finishing effect could not be obtained. Comparative example 3, which does not form a polyphenol compound without tyrosine, only in the presence of tyrosine is laccase and horseradish peroxidase catalyzed its synthesis to a polyphenol zwitterionic compound, which is the key molecule for surface modification. This key molecule cannot be formed in comparative example 3, and thus a significant softening effect cannot be obtained either.
Stiffness testing
According to GB/T18318-2001 (determination of bending length of textile fabrics) 5 samples are taken in warp and weft directions respectively for testing by using an HD207N automatic fabric stiffness tester, and the results are shown in Table 2.
TABLE 2
As can be seen from Table 2, the stiffness of the linen treated by the finishing process according to the invention is significantly reduced, i.e. the softness is significantly improved. Mainly because the crystal area of the linen fabric is destroyed by repeated quick freezing and alkali boiling and the action of acid cellulase, and a part of glycosidic bonds are also broken, which provides good conditions for the subsequent oxidation of the free hydroxyl groups of cellulose by a laccase/TEMPO system. Neither comparative example 1 nor comparative example 2 formed an effective reactive aldehyde group for grafting of the polyphenol amphoteric compound. In comparative example 3, the polyphenol amphoteric compound and the active amino group thereof were not formed, and thus the softening finishing effect of the example was not obtained.
The invention provides a method and a thought of a linen softening finishing method, and a method for realizing the technical scheme are more than one way, the above is only a preferred embodiment of the invention, and it should be pointed out that a plurality of improvements and modifications can be made by those skilled in the art without departing from the principle of the invention, and the improvements and modifications should also be regarded as the protection scope of the invention. The components not explicitly described in this embodiment can be implemented by using the prior art.
Claims (10)
1. A linen softening and finishing method, characterized by comprising the following steps:
s1, washing and drying linen fabric, then carrying out two-round liquid nitrogen and alkali water bath in sequence, and then washing and drying;
s2, putting the linen fabric treated in the step S1 into NaAc-HAc buffer solution containing tyrosine and mixed enzyme preparation, performing a first-stage reaction, then putting 2, 6-tetramethyl-1-piperidine oxygen free radical, continuously introducing oxygen into the solution, performing a second-stage reaction, washing with water, and drying.
2. A linen softening and finishing method according to claim 1, wherein in step S1, the alkali water is sodium hydroxide solution or potassium hydroxide solution, the concentration is 50-60g/L, and the temperature is 85-95 ℃.
3. The linen softening and finishing method according to claim 1, wherein in the step S2, the mixed enzyme preparation is prepared by mixing acid cellulase, laccase and horseradish peroxidase in a mass ratio of 1:2 (0.01-0.05).
4. A linen softening and finishing method according to claim 3, wherein the acid cellulase has a viability of 80000-100000U/g, laccase has a viability of 10000-20000U/g, horseradish peroxidase has a viability of 240000-300000U/g.
5. The linen softening and finishing method according to claim 1, wherein in step S2, the NaAc-HAc buffer solution has a pH value ranging from 4.0 to 5.0 and a concentration ranging from 0.1 to 0.12mol/L.
6. A linen softening and finishing process according to claim 1, wherein in step S2 the tyrosine and the mixed enzyme preparation are used in an amount of 0.065-0.074g/g linen and 0.23-0.45g/g linen, respectively.
7. A linen softening and finishing process according to claim 1, wherein in step S2, the amount of 2, 6-tetramethyl-1-piperidyloxy radicals is 0.05-0.08g/g linen.
8. A linen softening and finishing method according to claim 1, wherein in step S2, the ventilation of said oxygen is 0.5-0.8V/(V-min).
9. A linen softening and finishing process according to claim 1, characterized in that in step S2, the reaction temperature in the first stage is 30-37 ℃ and the reaction time is 12-24 hours.
10. A linen softening and finishing process according to claim 1, wherein in step S2, the second stage reaction temperature is 35-40 ℃ and the reaction time is 6-12h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310432844.2A CN116397436A (en) | 2023-04-21 | 2023-04-21 | Linen softening finishing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310432844.2A CN116397436A (en) | 2023-04-21 | 2023-04-21 | Linen softening finishing method |
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| CN116397436A true CN116397436A (en) | 2023-07-07 |
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| CN202310432844.2A Pending CN116397436A (en) | 2023-04-21 | 2023-04-21 | Linen softening finishing method |
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| CN (1) | CN116397436A (en) |
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2023
- 2023-04-21 CN CN202310432844.2A patent/CN116397436A/en active Pending
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