CN104947199A - Ramie degumming method - Google Patents
Ramie degumming method Download PDFInfo
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- CN104947199A CN104947199A CN201410116226.8A CN201410116226A CN104947199A CN 104947199 A CN104947199 A CN 104947199A CN 201410116226 A CN201410116226 A CN 201410116226A CN 104947199 A CN104947199 A CN 104947199A
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- ramie
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01C—CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
- D01C1/00—Treatment of vegetable material
- D01C1/02—Treatment of vegetable material by chemical methods to obtain bast fibres
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Abstract
The invention discloses ramie degumming method. The ramie degumming method comprises the following steps: boiling the original hemp of ramie in water, draining off, performing first soaking in an aqueous solution of sodium hydroxide, performing second soaking in an aqueous solution of alkaline pectinase with the pH value of 8.0-10.0, draining and drying after the soaking operation is finished, and thus finishing ramie degumming. The method can be used for ramie processing and has the advantages of small fiber damage, low energy consumption and high chemical degumming efficiency due to enzyme method degumming.
Description
Technical field
The present invention relates to the Degumming method of a kind of ramie.
Background technology
China is bast fiber production big country, cultivated area and bast-fibre output all at the forefront in the world.2007, China's ramie output reached 27.7 ten thousand tons, and all crudefiber crops reach 600,000 tons.Tradition crudefiber crop degumming tech adopts chemical Degumming, although degumming effect is relatively good, at scouring process, employs highly basic, acid and degumming agent in a large number, and the labour intensity of production is large, good can be many, seriously polluted, also has the drawbacks such as certain loss to fiber simultaneously.
It is strong that Study on enzymatic degumming has selectivity, mild condition, low energy consumption, and environmental protection and the advantage such as technique is simple, will be the inexorable trend of bast fiber production, and have huge market prospects.Current alkaline pectase degumming technology is still immature, mainly cannot thoroughly remove the impurity such as xylan, lignin with alkaline pectase merely.Therefore, a kind of new technology having enzymatic degumming and chemical Degumming advantage concurrently is still needed.
Summary of the invention
The object of this invention is to provide the Degumming method of a kind of ramie.
The Degumming method of ramie provided by the invention, comprises the steps:
After ramie raw ramie is boiled in water, drain, the aqueous solution being placed in NaOH carries out first time and soaks, then to be placed in pH value be that the aqueous solution of the alkaline pectase of 8.0-10.0 carries out second time immersion, after immersion, draining is dry, completes coming unstuck of described ramie.
In the boiling stage of said method, the time is 5-15 minute;
The mass percentage concentration of the aqueous solution of described NaOH is 0.5-2%, be specially 0.5%, 1%, 2%, 0.5%-1%, 1%-2%; The aqueous solution of described NaOH and the amount ratio of ramie raw ramie are 8L-15L: 1kg, are specially 12L: 1kg, 15L: 1kg, 12-15L: 1kg.
In the aqueous solution of described alkaline pectase, the vigor of alkaline pectase is 500U/ml-1000U/ml, is specially 600U/ml, 500-600U/ml or 600-1000U/ml; PH value is 8.0-10.0, is specially 9.5-10;
Alkaline pectase used for publication number be CN103215244A, application number is protein Pe1N described in the Chinese patent application of 201310155628.4.
The amount ratio of the aqueous solution of described ramie raw ramie and alkaline pectase is 1kg: 10L-25L, is specially 1kg: 15L, 1kg: 10-15L;
In described first time soaking step, temperature is 70-90 DEG C, and the time is 15-30 minute, is specially 25,25-30,15-25 minute;
In described second time soaking step, temperature is 45 DEG C-65 DEG C, is specially 50 DEG C, 45-50 DEG C, 50-65 DEG C; Time is 3 hours-4 hours, is specially 3.5 hours or 3.5-4 hour.
Described method also comprises the steps: before described boiling stage, and described ramie raw ramie water-soaked is placed 8-12 hour.
The invention provides a kind of applied chemistry method and alkaline pectase carries out the method for combination degumming to ramie, the method effectively can remove pectin in ramee and lignin impurity, when coming unstuck, reaction condition is gentle, little to fibre damage, energy consumption is low, higher than chemical Degumming efficiency, can be used for ramie processing.
Accompanying drawing explanation
Fig. 1 is the change curve of the solubility unsaturated polyester galacturonic acid that the pectic substance in embodiment 1 on ramie raw ramie fiber is produced by alkaline pectase decomposition with soak time;
Fig. 2 is the stereoscan photograph of the ramee after embodiment 1 different disposal.
Fig. 3 is the stereoscan photograph of the ramee after embodiment 2 different disposal.
Fig. 4 is the stereoscan photograph of the ramee after embodiment 3 different disposal.
Fig. 5 is the stereoscan photograph of the ramee after embodiment 4 different disposal.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further elaborated, but the present invention is not limited to following examples.Described method is conventional method if no special instructions.Described raw material all can obtain from open commercial sources if no special instructions.Ramie raw ramie used is purchased from Jiangxi Enda Home Textile Co., Ltd..Alkaline pectase used for publication number be CN103215244A, application number is protein Pe1N described in the Chinese patent application of 201310155628.4.
Embodiment 1, the coming unstuck of ramie
After placing 8 hours after 0.5kg ramie raw ramie water-soaked, drain, be dipped in hot water again and boil 5min, after taking out, draining is not to after having obvious water droplet, being placed in 7.5L mass percentage concentration is that the aqueous solution of the NaOH of 0.5% carries out first time in 90 DEG C and soaks 15 minutes, then add 5L500U/mL, the aqueous solution that pH value is the alkaline pectase of 9.5, carry out second time immersion after 4 hours in 45 DEG C, draining is dried, and completes coming unstuck of ramie.
In the process that second time is soaked, the amount of the solubility unsaturated polyester galacturonic acid being decomposed generation by the pectic substance on ramie raw ramie fiber by alkaline pectase is monitored,
Wherein, the computing formula of solubility unsaturated polyester galacturonic acid concentration (μm ol/mL) is as follows:
△ OD
235the absorbance of the absorbance-control group 235nm of=experimental group 235nm;
Extension rate when N is mensuration;
4600 is the molar absorption coefficient of unsaturated polyester galacturonic acid at 235nm place, and unit is Lmol
-1cm
-1;
B is cuvette thickness, and unit is cm, is 1cm;
Get soak time be 0.5,1,2,3,4 hour mapping, acquired results as shown in Figure 1, ■ alkaline pectin ferment treatment; ● the present invention, as seen from the figure, compared with simple use alkaline pectin ferment treatment, the efficiency of coming unstuck is higher, more thorough.
With the ramee after scanning electron microscopic observation different disposal, acquired results as Fig. 2, wherein, a ramie raw ramie; B alkaline pectin ferment treatment; C chemical treatment; D the inventive method.
As seen from the figure, the ramee after utilizing the method to come unstuck is removed more thorough than the fiber pectin of simple ferment treatment, more extensively more smooth than the fiber surface of pure chemistry method process.
Embodiment 2,
According to the step of embodiment 1, only the quality of ramie raw ramie is replaced with 1kg, NaOH volume replaces with 12L, second time soak alkaline pectase vigor replaces with 600U/mL, volume replaces with 10L.
Get soak time be 0.5,1,2,3 hour mapping, acquired results as shown in Figure 3, ■ alkaline pectin ferment treatment; ● the present invention, as seen from the figure, compared with simple use alkaline pectin ferment treatment, the efficiency of coming unstuck is higher, more thorough.
Embodiment 3,
According to the step of embodiment 1, only the naoh concentration that first time soaks is replaced with 2.0%, the time replaces with 30min, the alkaline pectin enzyme concentration that second time is soaked replaces with 1000U/mL, temperature replaces with 50 DEG C.
Get soak time be 0.5,1,2,3,4 hour mapping, acquired results as shown in Figure 4, ■ alkaline pectin ferment treatment; ● the present invention, as seen from the figure, compared with simple use alkaline pectin ferment treatment, the efficiency of coming unstuck is higher, more thorough.
Embodiment 4,
According to the step of embodiment 1, only the naoh concentration that first time soaks is replaced with 1.0%, temperature replaces with 70 DEG C, the time replaces with 25min, the pH value that second time is soaked replaces with 10.0, temperature replaces with 65 DEG C, the time replaces with 3.5 hours;
Get soak time be 0.5,1,2,3,3.5 hour mapping, acquired results as shown in Figure 5, ■ alkaline pectin ferment treatment; ● the present invention, as seen from the figure, compared with simple use alkaline pectin ferment treatment, the efficiency of coming unstuck is higher, more thorough.
Claims (8)
1. the Degumming method of a ramie, after comprising the steps: ramie raw ramie to boil in water, drain, the aqueous solution being placed in NaOH carries out first time and soaks, being placed in pH value is again that the aqueous solution of the alkaline pectase of 8.0-10.0 carries out second time and soaks, after immersion, draining is dry, completes coming unstuck of described ramie.
2. method according to claim 1, is characterized in that: in described boiling stage, and the time is 5-15 minute.
3. method according to claim 1 and 2, is characterized in that: the mass percentage concentration of the aqueous solution of described NaOH is 0.5-2%;
The aqueous solution of described NaOH and the amount ratio of ramie raw ramie are 8L-15L: 1kg, are specially 15L: 1kg.
4. according to the arbitrary described method of claim 1-3, it is characterized in that: in described first time soaking step, temperature is 70-90 DEG C, and the time is 15-30 minute.
5., according to the arbitrary described method of claim 1-4, it is characterized in that: in the aqueous solution of described alkaline pectase, the vigor of alkaline pectase is 500U/ml-1000U/ml; PH value is 8.0-10.0, is specially 9.5.
6., according to the arbitrary described method of claim 1-5, it is characterized in that: the amount ratio of the aqueous solution of described ramie raw ramie and alkaline pectase is 1kg: 10L-25L, is specially 1kg: 15L.
7., according to the arbitrary described method of claim 1-6, it is characterized in that: in described second time soaking step, temperature is 45 DEG C-65 DEG C; Time is 3 hours-4 hours.
8. according to the arbitrary described method of claim 1-7, to it is characterized in that: described method also comprises the steps: before described boiling stage, described ramie raw ramie water-soaked is placed 8-12 hour.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410116226.8A CN104947199A (en) | 2014-03-26 | 2014-03-26 | Ramie degumming method |
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| CN201410116226.8A CN104947199A (en) | 2014-03-26 | 2014-03-26 | Ramie degumming method |
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| CN201410116226.8A Pending CN104947199A (en) | 2014-03-26 | 2014-03-26 | Ramie degumming method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916460A (en) * | 2017-11-28 | 2018-04-17 | 黄桂凤 | A kind of Degumming method of hemp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1843851A (en) * | 1929-06-15 | 1932-02-02 | Thuau Urbain Jules Leon | Process of degumming textile plants |
| CN101358380A (en) * | 2008-09-27 | 2009-02-04 | 湖南华升洞庭麻业有限公司 | Ramie rapid degumming technique for producing high quality ramie top |
| CN101550606A (en) * | 2008-04-01 | 2009-10-07 | 湖南逐鹿苎麻纺织有限公司 | Ramie degumming method utilizing a complex enzyme preparation |
| CN102191566A (en) * | 2010-03-04 | 2011-09-21 | 上海康地恩生物科技有限公司 | Enzyme preparation for degumming fresh ramie and preparation method thereof and method for degumming fresh ramie |
| CN102517647A (en) * | 2011-11-28 | 2012-06-27 | 江苏紫荆花纺织科技股份有限公司 | Method for chemically degumming jute fiber by using biological enzyme |
-
2014
- 2014-03-26 CN CN201410116226.8A patent/CN104947199A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1843851A (en) * | 1929-06-15 | 1932-02-02 | Thuau Urbain Jules Leon | Process of degumming textile plants |
| CN101550606A (en) * | 2008-04-01 | 2009-10-07 | 湖南逐鹿苎麻纺织有限公司 | Ramie degumming method utilizing a complex enzyme preparation |
| CN101358380A (en) * | 2008-09-27 | 2009-02-04 | 湖南华升洞庭麻业有限公司 | Ramie rapid degumming technique for producing high quality ramie top |
| CN102191566A (en) * | 2010-03-04 | 2011-09-21 | 上海康地恩生物科技有限公司 | Enzyme preparation for degumming fresh ramie and preparation method thereof and method for degumming fresh ramie |
| CN102517647A (en) * | 2011-11-28 | 2012-06-27 | 江苏紫荆花纺织科技股份有限公司 | Method for chemically degumming jute fiber by using biological enzyme |
Non-Patent Citations (1)
| Title |
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| 张世源: "《生态纺织工程》", 31 May 2004, 中国纺织出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916460A (en) * | 2017-11-28 | 2018-04-17 | 黄桂凤 | A kind of Degumming method of hemp |
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Application publication date: 20150930 |