CN102787372A - Degumming method for corn cob wrapper fiber and obtained corn cob wrapper fiber - Google Patents
Degumming method for corn cob wrapper fiber and obtained corn cob wrapper fiber Download PDFInfo
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- CN102787372A CN102787372A CN2012102583458A CN201210258345A CN102787372A CN 102787372 A CN102787372 A CN 102787372A CN 2012102583458 A CN2012102583458 A CN 2012102583458A CN 201210258345 A CN201210258345 A CN 201210258345A CN 102787372 A CN102787372 A CN 102787372A
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Abstract
The invention provides a degumming method for corn cob wrapper fiber. The method is characterized by comprising the following steps: (1) screening out corn cob wrapper fiber without mildew and removing dust and foreign materials on wrappers; (2) pretreating corn cob wrapper fiber with urea and hydrogen peroxide; (3) degumming the corn cob wrapper fiber with ultrasonic waves under an alkaline condition; (4) carrying out in-depth degumming on the corn cob wrapper fiber by using biological enzyme; and (5) drying the obtained degummed corn cob wrapper fiber. The method provided by the invention has high degumming efficiency; the fiber prepared by using the method has good dispersibility, low content of residual gum and high strength; and the method is a highly efficient, green and environment-friendly degumming process applicable to practical production.
Description
Technical field
The present invention relates to a kind of preparation technology that agricultural waste material is utilized again and the product of acquisition; Particularly; The corn ear clad fibre that relates to a kind of Degumming method of corn ear clad fibre and use this method to obtain belongs to the technical field that renewable resource utilizes.
Background technology
Corn is the main cereal crops of China, in the most of region of China extensive plantation is arranged all, so corn ear foreskin aboundresources; But the utilization rate again to it is quite low, only is confined to feed, braiding, biogas etc., and major part is all burned; Contaminated environment not only, and wasted resource.After the corn ear clad fibre come unstuck, can replace other fibers to be used for industry, like the padded coaming of making wood-based plate, packing etc.Therefore, discarded corn ear foreskin is utilized again, both can reduce to burn and wait the environmental pollution that brings, can alleviate present energy-intensive crisis again, have the double dominant of environmental protection and economic well-being of workers and staff.
Now the come unstuck method of full blast of fiber is exactly that alkali comes unstuck, but has problems such as the alkali consumption is excessive, environmental pollution utilization rate serious, alkali is not high.
Summary of the invention
The object of the present invention is to provide the Degumming method and the thus obtained corn ear clad fibre of the corn ear clad fibre that a kind of environmental pollution is little, the efficient of coming unstuck is high.
Particularly, the Degumming method of corn ear clad fibre of the present invention comprises the steps:
(1) screening does not have the corn ear foreskin that goes mouldy, and removes dust and foreign material on the foreskin;
(2) the corn ear clad fibre being urinated oxygen in advance handles;
(3) under the alkali condition, the corn ear clad fibre is come unstuck with ultrasonic wave;
(4) with biology enzyme the corn ear clad fibre is deeply come unstuck;
(5) dry the corn ear clad fibre that obtains coming unstuck.
In the step (2), urea concentration is preferably 5.5-6.5g/L, and hydrogen peroxide concentration is preferably 7.5-8.5g/L, and treatment temperature is preferably the 30-40 degree, and the processing time is preferably 40-50 minute, and bath raio is preferably 1:15-20.
In the step (3); Ultrasonic frequency is preferably 33-55KHz, and alkali concn is preferably 25-30g/L, and sodium silicate silicate is preferably 1.5-2.2g/L; The polyphosphoric acids na concn is preferably 1.5-2.2g/L; Treatment temperature is preferably the 50-60 degree, and the processing time is preferably 20-25 minute, and bath raio is preferably 1:15-20.
In the step (4); The preferred mixed enzyme of using pectase and hemicellulase, mixed enzyme concentration is preferably 0.8-1.2g/L, and the proportion optimization of pectase and hemicellulase is 2.5-3.5:1; Treatment temperature is preferably the 45-55 degree; Processing time is preferably 1-2 hour, and bath raio is preferably 1:25-35, and pH is preferably 7-9.
In addition, the present invention also provides a kind of corn ear clad fibre, it is characterized in that, said corn ear clad fibre obtains according to method for preparing.
Method of the present invention come unstuck efficient height, environmental protection, the fiber dispersion of producing is good, and cull content is low, and is powerful high.
Specific embodiments
The Degumming method of corn ear clad fibre of the present invention comprises the steps:
(1) screening does not have the corn ear foreskin that goes mouldy, and removes dust and foreign material on the foreskin;
(2) the corn ear clad fibre being urinated oxygen in advance handles;
(3) under the alkali condition, the corn ear clad fibre is come unstuck with ultrasonic wave;
(4) with biology enzyme the corn ear clad fibre is deeply come unstuck;
(5) dry the corn ear clad fibre that obtains coming unstuck.
Step (1) is the process that the corn ear foreskin is screened, and need the corn ear foreskin that nothing is gone mouldy be picked out, and then foreign material such as dust that adheres on the corn ear foreskin and corncob is removed.
Step (2) is the oxidation of the infiltration, swelling action and the hydrogen peroxide solution that utilize urea is carried out preliminary treatment (i.e. " urinating oxygen in advance handles ") to the corn ear clad fibre a process.During in advance urine oxygen is handled, be to the corn ear foreskin compregnate that rolls.Handle through preparatory urine oxygen, can after the ultrasonic wave alkali treatment time, make alkali better affact colloid, reduce the burden of follow-up soda boiling, the raising efficient of coming unstuck.Wherein, the urea concentration of use is preferably 5.5-6.5g/L, more preferably 6g/L; Hydrogen peroxide concentration is preferably 7.5-8.5g/L, more preferably 8g/L.In advance urine oxygen handle preferred in the scope of 30-40 degree (30 degree more preferably) carry out, the processing time is preferably 40-50 minute (more preferably 40 minutes), bath raio is preferably 1:15-20 (1:15 more preferably).Washing is done water control through the fiber after urine oxygen is handled in advance then.
Step (3) is a process of utilizing supersonic generator under the alkali condition, the corn ear clad fibre tentatively to be come unstuck.When alkali treatment, implement ultrasonic technology, utilize hyperacoustic " cavitation effect ", can improve the efficient of coming unstuck; Its principle is following: zone of positive pressure and negative pressuren zone alternating action that the mechanical wave that supersonic generator produces is propagated, produce greater than 1000 atmospheric micro-bubbles, and explosion is at any time bombarded corn ear foreskin partial high pressure; Promote alkali to get into the fibrous inside effect; Help coming off of colloid, improve the utilization rate of alkali, improve the efficient of coming unstuck.Compare with simple alkali treatment, under equal extraction efficiency, method of the present invention can reduce the consumption of alkali, thereby reduces because the environmental pollution that causes of the discharging of alkali in a large number in the down-stream.Wherein, to the not special restriction of the alkali that uses, can enumerate: NaOH, potassium hydroxide etc., preferred NaOH; Alkali concn is preferably 25-30g/L, more preferably 28g/L; Sodium silicate silicate is preferably 1.5-2.2g/L, more preferably 2g/L; The polyphosphoric acids na concn is preferably 1.5-2.2g/L, more preferably 2g/L.Ultrasonic frequency is preferably 33-55KHz, more preferably 33KHz; Treatment temperature is preferably the 50-60 degree, more preferably 55 degree; Processing time is preferably 20-25 minute, more preferably 20 minutes; Bath raio is preferably 1:15-20, more preferably 1:20.With the fiber elder generation process hot water wash after handling under the ultrasonic wave alkali technology, and then through cold wash.
Step (4) is the process of under the biology enzyme condition, the corn ear clad fibre deeply being come unstuck.Biology enzyme will stir fiber during handling, and prevents that enzyme from precipitating.The principle of coming unstuck of biology enzyme is following: enzyme has the characteristics of selectivity, high efficiency, and enzyme active center and substrate form intermediate complex, and catabolite is emitted enzyme subsequently, thereby reaches the purpose of removing colloid.Fiber surface after coming unstuck is pure, and lines is clear, and colloid is removed thoroughly, can not be sticked together good dispersion because of colloid.In addition, because the enzyme effect is soft, so the fineness of fiber is corresponding diminishes, and fracture strength increases.Wherein, preferably use the mixed enzyme of pectase and hemicellulase, mixed enzyme concentration is preferably 0.8-1.2g/L, more preferably 1g/L; The proportion optimization of pectase and hemicellulase is 2.5-3.5:1, more preferably 3:1.The condition that enzyme is handled is preferably following: temperature 45-55 degree (more preferably 50 degree), processing time 1-2 hour (more preferably 1.5 hours), bath raio 1:25-30 (more preferably 1:30), pH7-9 (more preferably pH=7).To pass through fiber that biology enzyme handled and under hot water, wash and make the biology enzyme inactivation, and then wash through cold water.
Step (5) is the above-mentioned fiber through deeply coming unstuck of oven dry, obtains the process of the less corn ear clad fibre of inoglia content at last.To the not special restriction of bake out temperature, be generally the 70-90 degree.
In sum, method of the present invention adopts the method for ultrasonic wave-biology enzyme combination degumming to handle the corn ear clad fibre, and the speed of coming unstuck is fast, and efficient is high, environmental protection, and application prospect is very wide.
It is yellow that the corn ear clad fibre that is obtained by method for preparing is, and gum level is low, and powerful high, good dispersion can replace other fibers to be used for industry, like the padded coaming of making wood-based plate, packing etc.The residual gum content of fiber is below 25%, and fracture strength is more than 1.39cN/dtex, and fibre fineness is below 250dtex.
Embodiment
Enumerating embodiment below is elaborated to the present invention.But the present invention does not receive the restriction of following embodiment, before and after meeting the present invention, in the scope of aim, can do any variation to the present invention, and these variations include in technical scope of the present invention.
Embodiment 1
Choose the corn ear foreskin that does not have the cleaning of going mouldy; Take by weighing 10g and put into beaker; Add the 150ml running water according to bath raio 1:15, the hydrogen peroxide solution that takes by weighing 0.9g urea, 4g concentration and be 30wt% joins in the beaker, and effect is 40 minutes under the condition of 30 degree; To make solution can soak, fully soak into the inside of corn ear foreskin fully to the corn ear clad fibre compregnate that rolls during this time.After urine oxygen is finished dealing with in advance, washing corn ear clad fibre, control is done.
Add the 200ml running water according to bath raio 1:20, add 5.6g NaOH, 0.4g sodium metasilicate, 0.4g sodium polyphosphate, use supersonic generator (ultrasonic frequency 33KHz), under the condition of 55 degree, corn ear clad fibre effect 20 minutes.After the ultrasonic wave alkali treatment is accomplished, wash through the hot water of 50 degree earlier, and then, obtain 3.7g corn ear foreskin crude fibre through 4-5 cold water washing.
Measure distilled water 111ml according to bath raio 1:30, take by weighing 0.083g pectase, 0.028g hemicellulase and add in the beaker, under 50 degree conditions to corn ear clad fibre effect 1.5 hours (pH=7).To stir fiber during this time, prevent that enzyme from precipitating.To pass through the fiber that biology enzyme handled and in 50 degree hot water, wash, make the biology enzyme inactivation after, wash through cold water again, obtain the low corn ear clad fibre of 3.2g gum level (recovery rate of fiber is about 32.25%), it dried under 90 degree get final product.
The physicochemical property of the corn ear clad fibre that finally obtains: residual gum content is about 21.6%, and fineness is 210-235dtex, and fracture strength is 1.39-1.47cN/dtex.
Comparative example 1
Choose the corn ear foreskin that does not have the cleaning go mouldy, take by weighing 10g and put into beaker, add the 200ml running water, add 6g NaOH again according to bath raio 1:20, under the condition of 100 degree to corn ear clad fibre effect 20 minutes.After alkali treatment is accomplished,, and then, obtain 2.58g corn ear foreskin crude fibre, dry under spending 90 afterwards and get final product through 4-5 cold water washing earlier through the hot water washing of 50 degree.The fiber that obtains is thick and stiff and crisp, poor flexibility, and residual gum content is about 31.7%, and fineness is about 350dtex, and fracture strength is about 1.22cN/dtex.
Comparative example 2
When alkali treatment, do not use ultrasonic wave and do not carry out biological enzyme degumming, in addition, likewise handle the corn ear clad fibre with embodiment 1.Obtain 3.54g corn ear foreskin crude fibre, residual gum content is about 28.4%, and fineness is about 295dtex, and fracture strength is about 1.30cN/dtex.
Can know that by above-mentioned result of the test and compare with the fiber that obtains with preparatory urine oxygen processings-alkali treatment method with alkali treatment method, the fiber residual gum content that uses method of the present invention to obtain is low, good luster, fineness is good, and is soft and flexible, the intensity height.
In addition, each item physicochemical property of above-mentioned corn ear clad fibre is measured through following method and is obtained:
1. residual gum content: GB/T18147.2-2000 " hemp test method-part 2: residual gum content test method "
2. fineness: GB/T18147.4-2000 " hemp test method-the 4th part: fineness test method "
3. fracture strength: GB/T18147.5-2000 " hemp test method-the 5th part: fracture strength test method "
Claims (5)
1. the Degumming method of a corn ear clad fibre is characterized in that, said method comprises the steps:
(1) screening does not have the corn ear foreskin that goes mouldy, and removes dust and foreign material on the foreskin;
(2) the corn ear clad fibre being urinated oxygen in advance handles;
(3) under the alkali condition, the corn ear clad fibre is come unstuck with ultrasonic wave;
(4) with biology enzyme the corn ear clad fibre is deeply come unstuck;
(5) dry the corn ear clad fibre that obtains coming unstuck.
2. method according to claim 1 is characterized in that, in the step (2), urea concentration is 5.5-6.5g/L, and hydrogen peroxide concentration is 7.5-8.5g/L, and treatment temperature is the 30-40 degree, and the processing time is 40-50 minute, and bath raio is 1:15-20.
3. method according to claim 1 is characterized in that, in the step (3); Ultrasonic frequency is 33-55KHz, and alkali concn is 25-30g/L, and sodium silicate silicate is 1.5-2.2g/L; The polyphosphoric acids na concn is 1.5-2.2g/L; Treatment temperature is the 50-60 degree, and the processing time is 20-25 minute, and bath raio is 1:15-20.
4. method according to claim 1 is characterized in that, in the step (4); Use the mixed enzyme of pectase and hemicellulase, mixed enzyme concentration is 0.8-1.2g/L, and the proportioning of pectase and hemicellulase is 2.5-3.5:1; Treatment temperature is the 45-55 degree; Processing time is 1-2 hour, and bath raio is 1:25-35, and pH is 7-9.
5. a corn ear clad fibre is characterized in that, said corn ear clad fibre prepares according to any described method among the claim 1-4.
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| CN201210258345.8A CN102787372B (en) | 2012-07-24 | 2012-07-24 | Degumming method for corn cob wrapper fiber and obtained corn cob wrapper fiber |
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| CN201210258345.8A CN102787372B (en) | 2012-07-24 | 2012-07-24 | Degumming method for corn cob wrapper fiber and obtained corn cob wrapper fiber |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341898A (en) * | 2013-07-04 | 2013-10-09 | 大连工业大学 | Preparation method for flame retardant corn cob clad fiber/polylactic acid fiberboard |
| CN103498199A (en) * | 2013-10-14 | 2014-01-08 | 闽江学院 | Spinnable corn bract fiber and production method thereof |
| CN104032379A (en) * | 2014-06-30 | 2014-09-10 | 滁州惠智科技服务有限公司 | Preparation method of corn bran fiber and corn bran fiber prepared by using preparation method |
| CN107099860A (en) * | 2017-03-21 | 2017-08-29 | 河南洛阳红牡丹产业研发有限公司 | A kind of preparation method of tree peony seed pod fiber |
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| CN1113971A (en) * | 1994-06-17 | 1995-12-27 | 山东省东平大麻纺织总厂 | Technology for quickly hemp degumming |
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- 2012-07-24 CN CN201210258345.8A patent/CN102787372B/en not_active Expired - Fee Related
Patent Citations (1)
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| CN1113971A (en) * | 1994-06-17 | 1995-12-27 | 山东省东平大麻纺织总厂 | Technology for quickly hemp degumming |
Non-Patent Citations (4)
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| 《染整技术》 20110228 赵酒泉 "从玉米棒包皮中提取纤维素纤维的研究" 第12-16页 1-5 第33卷, 第2期 * |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341898A (en) * | 2013-07-04 | 2013-10-09 | 大连工业大学 | Preparation method for flame retardant corn cob clad fiber/polylactic acid fiberboard |
| CN103341898B (en) * | 2013-07-04 | 2016-04-06 | 大连工业大学 | A kind of preparation method of flame retardant corn cob clad fiber/polylactic acid fiberboard |
| CN103498199A (en) * | 2013-10-14 | 2014-01-08 | 闽江学院 | Spinnable corn bract fiber and production method thereof |
| CN104032379A (en) * | 2014-06-30 | 2014-09-10 | 滁州惠智科技服务有限公司 | Preparation method of corn bran fiber and corn bran fiber prepared by using preparation method |
| CN105154994A (en) * | 2014-06-30 | 2015-12-16 | 耿云花 | Corn bran fibers |
| CN104032379B (en) * | 2014-06-30 | 2015-12-30 | 青岛晟任现代农业发展有限公司 | A kind of preparation method of corn wrapper fibre and the corn wrapper fibre obtained by the method |
| CN105154994B (en) * | 2014-06-30 | 2017-05-24 | 广州市深科信企业管理咨询有限公司 | Corn bran fibers |
| CN107099860A (en) * | 2017-03-21 | 2017-08-29 | 河南洛阳红牡丹产业研发有限公司 | A kind of preparation method of tree peony seed pod fiber |
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