CN102560693A - Method for chemical degumming of jute fiber using compound enzyme - Google Patents
Method for chemical degumming of jute fiber using compound enzyme Download PDFInfo
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- CN102560693A CN102560693A CN2011103820259A CN201110382025A CN102560693A CN 102560693 A CN102560693 A CN 102560693A CN 2011103820259 A CN2011103820259 A CN 2011103820259A CN 201110382025 A CN201110382025 A CN 201110382025A CN 102560693 A CN102560693 A CN 102560693A
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Abstract
The invention disclosed a method for chemical degumming of jute fiber using a compound enzyme, which comprises the following steps: determining the weight of raw jute; mixing a compound enzyme (the weight of which is 0.5-5% of the weight of the raw jute) and water (the weight of which is 12-35 times of the weight of the raw jute) to obtain a compound enzyme aqueous solution, wherein the compound enzyme is mixed by laccase and pectinase, and the weight of pectinase accounts for 30-90% of the compound enzyme; regulating the pH value to 4.0-6.0 and the temperature to 40-65 DEG C, keeping the raw jute soaked in the compound enzyme aqueous solution for 30-150 minutes, so that the laccase in the compound enzyme acts on the raw jute; then regulating the pH value to 7.5-9.5 and the temperature to 50-70 DEG C, and holding for 20-120 minutes, so that the pectinase in the compound enzyme acts on the raw jute; performing chemical degumming of the raw jute; performing enzyme deactivation treatment of the jute treated by the compound enzyme aqueous solution; and taking out the degummed jute and drying. The method of the invention uses the compound enzyme to degum the jute, and has simple procedures and good lignin removal effect.
Description
Technical field
The present invention relates to a kind of jute degumming method, particularly relate to a kind of complex enzyme chemical Degumming method of tossa.
Background technology
Because flax fibre has preferably sucting wet air permeability, low static behaviour and good antibacterial characteristics, hemp product more and more receives people's favor, but because flax, ramie price are higher, make hemp product use and be restricted.Jute is the second-biggest-in-the-world cellulose fibre that is only second to cotton, and is cheap, compares with flax, ramie to have better hygroscopicity and drapability, and antibacterial ability is only second to hemp, has huge using value and potentiality to be exploited.But because the content of lignin higher (can reach 10-13%) in the jute than high several times of flax, adopts conventional Degumming method that tossa is come unstuck, removes the lignin weak effect, so restricted the application of jute in textiles greatly.Chinese patent document CN1232691C discloses the method that a kind of applying composite enzyme comes unstuck to jute; To the tossa processing of coming unstuck, the tossa warp of gained and other fiber are like cotton, chemical fibre blending or interweave and can satisfy the requirement of garment material basically with the complex enzyme of pectase and laccase for this method.But above-mentioned patent documentation disclosed method is desirable not enough to the removal of lignin impurity in the tossa; Clearance is merely about 76%; The content of lignin is still higher in the tossa of gained, need with other fiber like cotton, chemical fibre blending or interweave, if the fabric that adopts the true yellow flax fibre to weave out; Feel is bad, weak effect.
Summary of the invention
Goal of the invention: in order to solve the problems of the prior art, the invention provides a kind of method that adopts complex enzyme that jute is come unstuck, this method can effectively be removed pectin and the lignin impurity in the tossa.
Technical scheme: to achieve these goals, the complex enzyme chemical Degumming method of a kind of tossa of the present invention, this method may further comprise the steps:
(A) confirm the weight of single treatment jute raw ramie;
(B) the configuration complex enzyme aqueous solution: get 0.5～5% the complex enzyme of jute raw ramie weight and the water of 12～35 times of jute raw ramie weight and be mixed into the complex enzyme aqueous solution; Said complex enzyme is mixed by laccase and pectase, and the weight ratio of pectase is 30～90% in the complex enzyme;
(C) the complex enzyme pH value of aqueous solution is adjusted to 4.0～6.0, temperature is 40～65 ℃, the jute raw ramie impregnated in kept in the complex enzyme aqueous solution 30～150 minutes, lets laccase in the complex enzyme to the raw ramie effect; And then the complex enzyme pH value of aqueous solution is adjusted to 7.5～9.5, temperature is 50～70 ℃, keeps 20～120 minutes, lets pectase in the complex enzyme to the effect of jute raw ramie;
(D) the jute raw ramie being carried out chemical Degumming handles: get 1～20% the NaOH of jute raw ramie weight and the water of 10～40 times of jute raw ramie weight and be mixed into sodium hydroxide solution; Regulating temperature is 80～95 ℃; To be immersed in the sodium hydroxide solution through the jute raw ramie that the complex enzyme aqueous solution was handled, kept 20～150 minutes;
(E) jute after handling through the complex enzyme aqueous solution being carried out enzyme deactivation handles;
The jute of (F) taking out after coming unstuck is dried.
In sodium hydroxide solution, can add 0.5～5% bleeding agent of jute raw ramie weight in the step described in the present invention (D).
Said bleeding agent is chosen as PST or JFC.
Be included in the step among the present invention (C) and the jute raw ramie carried out preliminary treatment before the jute raw ramie impregnated in the complex enzyme aqueous solution.
Step described in the present invention (D) is carried out the synergy processed steps of banking up before; Said synergy time of handling of banking up is 5～20 hours.
Enzyme deactivation in the step described in the present invention (E) is treated to the high temperature washing or regulates the pH value and carry out enzyme deactivation processing, perhaps both combinations; The temperature of water was 80 ℃～100 ℃ when said high temperature was washed; PH value when adjusting pH value is carried out the enzyme deactivation processing is greater than 10.0 or less than 4.0.
Preliminary treatment described in the present invention is one or more the combination in water-bath, acid bath or the hydrogen peroxide dipping.
When water-bath was adopted in preliminary treatment described in the present invention, bath temperature was 35～75 ℃, and the time is 30～180 minutes; Jute raw ramie degumming rate after the employing water-bath is than having improved 1%～3% without pretreated.
When acid bath is adopted in preliminary treatment described in the present invention, use sulfuric acid or acetic acid, the concentration of sulfuric acid or acetic acid is: 5%～20%, and the acid bath temperature is 20～35 ℃, the time is 20～150 minutes; Jute raw ramie degumming rate after the employing acid bath is than having improved 2%～5% without pretreated.
Beneficial effect: the present invention has following advantage:
1, the present invention's mode of adopting combined-enzyme method to combine with chemical method is come unstuck to jute; Complex enzyme is handled in the part pectin and lignin of removing the jute flax fibre; Can make the jute internal structure loose, carry out chemical Treatment then, treatment fluid can get into tossa inside more easily; More easily tossa is come unstuck, degumming rate reaches more than 88%; Simultaneously can further carry out refinement to tossa, the tossa fineness after the inventive method is handled can reach more than 550 public.
2, the present invention adopts first complex enzyme processing to carry out chemical treatment then, but not first chemical treatment complex enzyme processing then.Because the strong base solution in the chemical treatment have certain damaging action to the fiber in the jute; Jute internal structure without complex enzyme is handled is tightr; If adopt chemical treatment this moment, strong base solution can cause damage to the cellulose in the jute when removing pectin and lignin; Thereby the intensity of tossa is reduced, finally cause the spinnability variation of tossa.And adopt chemical treatment earlier, and can not make the internal structure of tossa become loose, use complex enzyme to handle the effect that does not also reach further refinement tossa then.
The specific embodiment
Embodiment 1
A kind of complex enzyme chemical Degumming method of tossa, this method may further comprise the steps:
(A) confirm the weight of single treatment jute raw ramie: will be unpacked by the jute that market is buied, be one with 0.5 kilogram;
(B) the configuration complex enzyme aqueous solution: get 0.5% the complex enzyme of jute raw ramie weight and the water of 12 times of jute raw ramie weight and be mixed into the complex enzyme aqueous solution, said complex enzyme is mixed by laccase and pectase, and the weight ratio of pectase is 30% in the complex enzyme;
(C) the complex enzyme pH value of aqueous solution is adjusted to 4.0, temperature is 40 ℃, the jute raw ramie impregnated in the complex enzyme aqueous solution kept 30 minutes, lets laccase in the complex enzyme to the raw ramie effect; And then the complex enzyme pH value of aqueous solution is adjusted to 7.5, temperature is 50 ℃, keeps 20 minutes, lets pectase in the complex enzyme to the effect of jute raw ramie;
(D) the jute raw ramie being carried out chemical Degumming handles: get 1% the NaOH of jute raw ramie weight and the water of 10 times of jute raw ramie weight and be mixed into sodium hydroxide solution; Regulating temperature is 80 ℃; To be immersed in the sodium hydroxide solution through the jute raw ramie that the complex enzyme aqueous solution was handled, kept 20 minutes;
(E) jute after handling through the complex enzyme aqueous solution being carried out enzyme deactivation handles; Enzyme deactivation is treated to the high temperature washing and regulates the pH value and carry out the method that the enzyme deactivation processing combines, and the temperature of water is 80 ℃ during the high temperature washing; PH value when adjusting pH value is carried out the enzyme deactivation processing is adjusted to 10.5;
The jute of (F) taking out after coming unstuck is dried.
Embodiment 2
A kind of complex enzyme chemical Degumming method of tossa, this method may further comprise the steps:
(A) confirm the weight of single treatment jute raw ramie: will be unpacked by the jute that market is buied, be one with 1 kilogram;
(B) the configuration complex enzyme aqueous solution: get 5% the complex enzyme of jute raw ramie weight and the water of 35 times of jute raw ramie weight and be mixed into the complex enzyme aqueous solution, said complex enzyme is mixed by laccase and pectase, and the weight ratio of pectase is 90% in the complex enzyme;
(C) the complex enzyme pH value of aqueous solution is adjusted to 6.0, temperature is 65 ℃, the jute raw ramie impregnated in the complex enzyme aqueous solution kept 150 minutes, lets laccase in the complex enzyme to the raw ramie effect; And then the complex enzyme pH value of aqueous solution is adjusted to 9.5, temperature is 70 ℃, keeps 120 minutes, lets pectase in the complex enzyme to the effect of jute raw ramie;
(D) the jute raw ramie being carried out chemical Degumming handles: get 20% the NaOH of jute raw ramie weight and the water of 40 times of jute raw ramie weight and be mixed into sodium hydroxide solution; Regulating temperature is 90 ℃; To be immersed in the sodium hydroxide solution through the jute raw ramie that the complex enzyme aqueous solution was handled, kept 120 minutes;
(E) jute after handling through the complex enzyme aqueous solution being carried out enzyme deactivation handles; Enzyme deactivation is treated to the high temperature washing, and the temperature of water is 80 ℃ during the high temperature washing;
The jute of (F) taking out after coming unstuck is dried.
Embodiment 3
A kind of complex enzyme chemical Degumming method of tossa, this method may further comprise the steps:
(A) confirm the weight of single treatment jute raw ramie: will be unpacked by the jute that market is buied, be one with 0.5 kilogram;
(B) the configuration complex enzyme aqueous solution: get 1.5% the complex enzyme of jute raw ramie weight and the water of 15 times of jute raw ramie weight and be mixed into the complex enzyme aqueous solution, said complex enzyme is mixed by laccase and pectase, and the weight ratio of pectase is 35% in the complex enzyme;
(C) the complex enzyme pH value of aqueous solution is adjusted to 4.5, temperature is 45 ℃, the jute raw ramie impregnated in the complex enzyme aqueous solution kept 40 minutes, lets laccase in the complex enzyme to the raw ramie effect; And then the complex enzyme pH value of aqueous solution is adjusted to 7.8, temperature is 55 ℃, keeps 25 minutes, lets pectase in the complex enzyme to the effect of jute raw ramie;
(D) the jute raw ramie being carried out chemical Degumming handles: get 11% the NaOH of jute raw ramie weight and the water of 32 times of jute raw ramie weight and be mixed into sodium hydroxide solution; Regulating temperature is 95 ℃; To be immersed in the sodium hydroxide solution through the jute raw ramie that the complex enzyme aqueous solution was handled, kept 150 minutes; In sodium hydroxide solution, add 0.5% bleeding agent of jute raw ramie weight; Bleeding agent is chosen as PST;
(E) jute after handling through the complex enzyme aqueous solution being carried out enzyme deactivation handles; Enzyme deactivation is handled through regulating the pH value and is carried out the enzyme deactivation processing, and pH value is 3.2;
The jute of (F) taking out after coming unstuck is dried.
Embodiment 4
A kind of complex enzyme chemical Degumming method of tossa, this method may further comprise the steps:
(A) confirm the weight of single treatment jute raw ramie: will be unpacked by the jute that market is buied, 0.5 kilogram is one;
(B) the configuration complex enzyme aqueous solution: get 4.5% the complex enzyme of jute raw ramie weight and the water of 30 times of jute raw ramie weight and be mixed into the complex enzyme aqueous solution, said complex enzyme is mixed by laccase and pectase, and the weight ratio of pectase is 85% in the complex enzyme;
(C) the complex enzyme pH value of aqueous solution is adjusted to 5.0, temperature is 60 ℃, the jute raw ramie impregnated in the complex enzyme aqueous solution kept 100 minutes, lets laccase in the complex enzyme to the raw ramie effect; And then the complex enzyme pH value of aqueous solution is adjusted to 8.3, temperature is 62 ℃, keeps 72 minutes, lets pectase in the complex enzyme to the effect of jute raw ramie;
(D) the jute raw ramie being carried out chemical Degumming handles: get 5% the NaOH of jute raw ramie weight and the water of 15 times of jute raw ramie weight and be mixed into sodium hydroxide solution; Regulating temperature is 85 ℃; To be immersed in the sodium hydroxide solution through the jute raw ramie that the complex enzyme aqueous solution was handled; Kept 40 minutes, and can add 5% bleeding agent of jute raw ramie weight in the sodium hydroxide solution; Bleeding agent is JFC;
(E) jute after handling through the complex enzyme aqueous solution being carried out enzyme deactivation handles; Said enzyme deactivation is treated to high temperature washing and regulates pH value and carry out the enzyme deactivation processing and combine; The temperature of water was 100 ℃ when said high temperature was washed; Regulate the pH value less than 3.0;
The jute of (F) taking out after coming unstuck is dried.
Embodiment 5
A kind of complex enzyme chemical Degumming method of tossa, this method may further comprise the steps:
(A) confirm the weight of single treatment jute raw ramie: will be unpacked by the jute that market is buied, 0.5 kilogram is one;
(B) the configuration complex enzyme aqueous solution: get 2.5% the complex enzyme of jute raw ramie weight and the water of 25 times of jute raw ramie weight and be mixed into the complex enzyme aqueous solution, said complex enzyme is mixed by laccase and pectase, and the weight ratio of pectase is 60% in the complex enzyme;
(C) before the jute raw ramie being impregnated in the complex enzyme aqueous solution, the jute raw ramie is carried out preliminary treatment, said preliminary treatment is acid bath, and working concentration is 20% aqueous sulfuric acid, and the acid bath temperature is 20 ℃, and the time is 20 minutes; Again the complex enzyme pH value of aqueous solution is adjusted to 4.7, temperature is 55 ℃, the jute raw ramie impregnated in the complex enzyme aqueous solution kept 80 minutes, lets laccase in the complex enzyme to the raw ramie effect; And then the complex enzyme pH value of aqueous solution is adjusted to 9.2, temperature is 68 ℃, keeps 95 minutes, lets pectase in the complex enzyme to the effect of jute raw ramie;
(D) carry out the synergy processed steps of banking up; Said synergy time of handling of banking up is 5 hours; The jute raw ramie is carried out chemical Degumming to be handled: get 12% the NaOH of jute raw ramie weight and the water of 30 times of jute raw ramie weight and be mixed into sodium hydroxide solution; Regulating temperature is 92 ℃; To be immersed in the sodium hydroxide solution through the jute raw ramie that the complex enzyme aqueous solution was handled, kept 60 minutes, can add 1.5% bleeding agent of jute raw ramie weight in the sodium hydroxide solution; Bleeding agent is JFC;
(E) jute after handling through the complex enzyme aqueous solution being carried out enzyme deactivation handles; Said enzyme deactivation is treated to high temperature washing and regulates pH value and carry out the enzyme deactivation processing and combine; The temperature of water was 95 ℃ when said high temperature was washed; Regulating the pH value is 11.0;
The jute of (F) taking out after coming unstuck is dried.
Embodiment 6
A kind of complex enzyme chemical Degumming method of tossa, this method may further comprise the steps:
(A) confirm the weight of single treatment jute raw ramie: will be unpacked by the jute that market is buied, 0.5 kilogram is one;
(B) the configuration complex enzyme aqueous solution: get 4.1% the complex enzyme of jute raw ramie weight and the water of 22 times of jute raw ramie weight and be mixed into the complex enzyme aqueous solution, said complex enzyme is mixed by laccase and pectase, and the weight ratio of pectase is 32% in the complex enzyme;
(C) before the jute raw ramie being impregnated in the complex enzyme aqueous solution, the jute raw ramie is carried out preliminary treatment, said preliminary treatment is acid bath, and working concentration is 5% aqueous acetic acid, and the acid bath temperature is 35 ℃, and the time is 150 minutes; Again the complex enzyme pH value of aqueous solution is adjusted to 5.8, temperature is 62 ℃, the jute raw ramie impregnated in the complex enzyme aqueous solution kept 120 minutes, lets laccase in the complex enzyme to the raw ramie effect; And then the complex enzyme pH value of aqueous solution is adjusted to 8.5, temperature is 65 ℃, keeps 110 minutes, lets pectase in the complex enzyme to the effect of jute raw ramie;
(D) carry out the synergy processed steps of banking up; Said synergy time of handling of banking up is 20 hours; The jute raw ramie is carried out chemical Degumming to be handled: get 18% the NaOH of jute raw ramie weight and the water of 35 times of jute raw ramie weight and be mixed into sodium hydroxide solution; Regulating temperature is 85 ℃; To be immersed in the sodium hydroxide solution through the jute raw ramie that the complex enzyme aqueous solution was handled, kept 130 minutes, can add 3% bleeding agent of jute raw ramie weight in the sodium hydroxide solution; Bleeding agent is PST;
(E) jute after handling through the complex enzyme aqueous solution being carried out enzyme deactivation handles; Said enzyme deactivation is treated to high temperature washing and regulates pH value and carry out the enzyme deactivation processing and combine; The temperature of water was 85 ℃ when said high temperature was washed; Regulating the pH value is 3.5;
The jute of (F) taking out after coming unstuck is dried.
Claims (10)
1. the complex enzyme chemical Degumming method of a tossa is characterized in that, this method may further comprise the steps:
(A) confirm the weight of single treatment jute raw ramie;
(B) the configuration complex enzyme aqueous solution: get 0.5～5% the complex enzyme of jute raw ramie weight and the water of 12～35 times of jute raw ramie weight and be mixed into the complex enzyme aqueous solution; Said complex enzyme is mixed by laccase and pectase, and the weight ratio of pectase is 30～90% in the complex enzyme;
(C) the complex enzyme pH value of aqueous solution is adjusted to 4.0～6.0; Temperature is 40～65 ℃, the jute raw ramie impregnated in kept in the complex enzyme aqueous solution 30～150 minutes, lets laccase in the complex enzyme to the raw ramie effect; And then the complex enzyme pH value of aqueous solution is adjusted to 7.5～9.5; Temperature is 50～70 ℃, keeps 20～120 minutes, lets pectase in the complex enzyme to the effect of jute raw ramie;
(D) the jute raw ramie being carried out chemical Degumming handles: get 1～20% the NaOH of jute raw ramie weight and the water of 10～40 times of jute raw ramie weight and be mixed into sodium hydroxide solution; Regulating temperature is 80～95 ℃; To be immersed in the sodium hydroxide solution through the jute raw ramie that the complex enzyme aqueous solution was handled, kept 20～150 minutes;
(E) jute after handling through the complex enzyme aqueous solution being carried out enzyme deactivation handles;
The jute of (F) taking out after coming unstuck is dried.
2. the complex enzyme chemical Degumming method of a kind of tossa according to claim 1 is characterized in that, in sodium hydroxide solution, can add 0.5～5% bleeding agent of jute raw ramie weight in the said step (D).
3. the complex enzyme chemical Degumming method of a kind of tossa according to claim 2 is characterized in that, said bleeding agent is PST or JFC.
4. the complex enzyme chemical Degumming method of a kind of tossa according to claim 1 is characterized in that, is included in the step (C) the jute raw ramie to be carried out preliminary treatment before the jute raw ramie impregnated in the complex enzyme aqueous solution.
5. the complex enzyme chemical Degumming method of a kind of tossa according to claim 1 is characterized in that, also is included in said step (D) and carries out the synergy processed steps of banking up before; Said synergy time of handling of banking up is 5～20 hours.
6. the complex enzyme chemical Degumming method of a kind of tossa according to claim 1 is characterized in that, the enzyme deactivation in the said step (E) is treated to the high temperature washing or regulates the pH value and carry out enzyme deactivation processing, perhaps both combinations.
7. the complex enzyme chemical Degumming method of a kind of tossa according to claim 6 is characterized in that, the temperature of water is 80 ℃～100 ℃ when carrying out the washing of said high temperature; PH value when adjusting pH value is carried out the enzyme deactivation processing is greater than 10.0 or less than 4.0.
8. according to the complex enzyme chemical Degumming method of the said a kind of tossa of claim 4, it is characterized in that water-bath is adopted in said preliminary treatment, bath temperature is 35～75 ℃, and the time is 30～180 minutes.
9. according to the complex enzyme chemical Degumming method of the said a kind of tossa of claim 4, it is characterized in that said preliminary treatment is one or more the combination in water-bath, acid bath or the hydrogen peroxide dipping.
10. according to the complex enzyme chemical Degumming method of the said a kind of tossa of claim 9, it is characterized in that use sulfuric acid or acetic acid during said acid bath, the concentration of sulfuric acid or acetic acid is: 5%～20%, the acid bath temperature is 20～35 ℃, the time is 20～150 minutes.
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| CN103132153A (en) * | 2013-03-18 | 2013-06-05 | 河南舒莱卫生用品有限公司 | Preparation method and application of antibacterial ramie fiber |
| CN113699597A (en) * | 2021-09-07 | 2021-11-26 | 常州绿建黄麻科技有限公司 | Method for degumming jute fiber by using compound enzyme |
| CN114753012A (en) * | 2022-04-24 | 2022-07-15 | 齐齐哈尔大学 | Preparation method of industrial cotton hemp fiber |
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