CN102787372B - 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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- CN102787372B CN102787372B CN201210258345.8A CN201210258345A CN102787372B CN 102787372 B CN102787372 B CN 102787372B CN 201210258345 A CN201210258345 A CN 201210258345A CN 102787372 B CN102787372 B CN 102787372B
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- corn ear
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- corn cob
- clad fibre
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- 239000000835 fiber Substances 0.000 title claims abstract description 72
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 title claims abstract description 66
- 235000002017 Zea mays subsp mays Nutrition 0.000 title claims abstract description 66
- 235000005822 corn Nutrition 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 41
- 241000209149 Zea Species 0.000 title 2
- 240000008042 Zea mays Species 0.000 claims abstract description 64
- 108090000790 Enzymes Proteins 0.000 claims abstract description 22
- 102000004190 Enzymes Human genes 0.000 claims abstract description 22
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004202 carbamide Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims abstract description 5
- 238000012216 screening Methods 0.000 claims abstract description 4
- 239000003513 alkali Substances 0.000 claims description 25
- 229940088598 enzyme Drugs 0.000 claims description 22
- 210000003953 foreskin Anatomy 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 229940059442 hemicellulase Drugs 0.000 claims description 7
- 108010002430 hemicellulase Proteins 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 229920000137 polyphosphoric acid Polymers 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 210000002700 urine Anatomy 0.000 description 6
- 239000000084 colloidal system Substances 0.000 description 5
- 238000003912 environmental pollution Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 244000025254 Cannabis sativa Species 0.000 description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 3
- 108010059892 Cellulase Proteins 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 235000009120 camo Nutrition 0.000 description 3
- 229940106157 cellulase Drugs 0.000 description 3
- 235000005607 chanvre indien Nutrition 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011487 hemp Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000002779 inactivation Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 235000019830 sodium polyphosphate Nutrition 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 230000036642 wellbeing Effects 0.000 description 1
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- Chemical Or Physical Treatment Of Fibers (AREA)
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 to the preparation technology of agricultural waste material recycling and the product of acquisition, particularly, relate to a kind of Degumming method of corn ear clad fibre and the corn ear clad fibre that uses the method to obtain, belong to the technical field that renewable resource utilizes.
Background technology
Corn is the main cereal crops of China, has extensive plantation, therefore corn ear foreskin aboundresources in the most of region of China, but the recycling rate to it is quite low, is only confined to feed, braiding, biogas etc., and major part is all burned, contaminated environment not only, and wasted resource.After corn ear clad fibre is come unstuck, can replace other fibers for industry, as padded coaming of making artificial plate, packing etc.Therefore, discarded corn ear foreskin is recycled, both can reduce to burn and wait the environmental pollution bringing, can alleviate again present energy-intensive crisis, there is 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 the problems such as 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 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 efficiency of coming unstuck is high.
Particularly, the Degumming method of corn ear clad fibre of the present invention comprises the steps:
(1) screening, without the corn ear foreskin going mouldy, is removed dust and foreign material on foreskin;
(2) corn ear clad fibre being urinated to oxygen in advance processes;
(3) under alkali condition, with ultrasonic wave, corn ear clad fibre is come unstuck;
(4) with biology enzyme, corn ear clad fibre is deeply come unstuck;
(5) dry the corn ear clad fibre that obtains coming unstuck.
In 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 30-40 degree, and the processing time is preferably 40-50 minute, and bath raio is preferably 1:15-20.
In step (3), ultrasonic frequency is preferably 33-55KHz, alkali concn is preferably 25-30g/L, sodium silicate silicate is preferably 1.5-2.2g/L, polyphosphoric acids na concn is preferably 1.5-2.2g/L, treatment temperature is preferably 50-60 degree, and the processing time is preferably 20-25 minute, and bath raio is preferably 1:15-20.
In step (4), preferably use the mixed enzyme of pectase and hemicellulase, mixed enzyme concentration is preferably 0.8-1.2g/L, the proportion optimization of pectase and hemicellulase is 2.5-3.5:1, treatment temperature is preferably 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, described corn ear clad fibre prepares according to said method.
Method of the present invention is come unstuck, and efficiency is high, environmental protection, and the fiber dispersion of producing is good, and cull content is low, powerful high.
Specific embodiments
The Degumming method of corn ear clad fibre of the present invention comprises the steps:
(1) screening, without the corn ear foreskin going mouldy, is removed dust and foreign material on foreskin;
(2) corn ear clad fibre being urinated to oxygen in advance processes;
(3) under alkali condition, with ultrasonic wave, corn ear clad fibre is come unstuck;
(4) with biology enzyme, 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 corn ear foreskin is screened, and need to will pick out without the corn ear foreskin going mouldy, and then the foreign material such as the dust adhering on corn ear foreskin and corncob is removed.
Step (2) is that the oxidation of the infiltration, swelling action and the hydrogen peroxide that utilize urea is carried out the process of preliminary treatment (i.e. " urinating in advance oxygen processes ") to corn ear clad fibre.During pre-urine oxygen is processed, be to the corn ear foreskin compregnate that rolls.By pre-urine oxygen, process, can after ultrasonic wave alkali treatment time, make alkali better be applied to colloid, reduce the burden of follow-up soda boiling, improve the efficiency 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.This pre-urine oxygen is processed preferably in the scope of 30-40 degree (more preferably 30 degree) and is carried out, and the processing time is preferably 40-50 minute (more preferably 40 minutes), and bath raio is preferably more preferably 1:15 of 1:15-20().The fiber of washing after pre-urine oxygen is processed, then that water control is dry.
Step (3) is the process of utilizing supersonic generator under alkali condition, corn ear clad fibre tentatively to be come unstuck.When alkali treatment, implement ultrasonic technology, utilize hyperacoustic " cavitation effect ", can improve the efficiency of coming unstuck, its principle is as follows: zone of positive pressure and negative pressuren zone alternating action that the mechanical wave that supersonic generator produces is propagated, and produce and be greater than 1000 atmospheric micro-bubbles, explosion is at any time bombarded corn ear foreskin partial high pressure, promote that alkali enters fibrous inside effect, be conducive to coming off of colloid, improve the utilization rate of alkali, improve the efficiency 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 the environmental pollution because the discharge of alkali causes in a large number in down-stream.Wherein, the alkali using is not particularly limited, can enumerates: NaOH, potassium hydroxide etc., preferably 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; 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 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.Fiber after processing under ultrasonic wave alkali technique is first passed through to hot water wash, and then through cold wash.
Step (4) is the process of under biology enzyme condition, corn ear clad fibre deeply being come unstuck.During cellulase treatment, stir fiber, prevent that enzyme from precipitating.The principle of coming unstuck of biology enzyme is as follows: enzyme has the feature of selectivity, high efficiency, and enzyme active center and substrate form intermediate complex, and catabolite is emitted enzyme subsequently, thereby reaches the object of removing colloid.Fiber surface after coming unstuck is pure, and lines is clear, and colloid is removed thoroughly, can not be sticked together because of colloid, and good dispersion.In addition, because 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 processed is preferably as follows: temperature 45-55 degree (more preferably 50 degree), processing time 1-2 hour (more preferably 1.5 hours), bath raio 1:25-30(is 1:30 more preferably), pH7-9(is pH=7 more preferably).The fiber of crossing through cellulase treatment is washed and made biology enzyme inactivation under hot water, and then wash through cold water.
Step (5) is to dry the above-mentioned fiber through deeply coming unstuck, and finally obtains the process of the less corn ear clad fibre of inoglia content.Bake out temperature is not particularly limited, is generally 70-90 degree.
In sum, method of the present invention adopts the method that ultrasonic wave-Bio-enzyme Combined Pre-treatment comes unstuck to process corn ear clad fibre, and the speed of coming unstuck is fast, and efficiency is high, environmental protection, and application prospect is very wide.
It is yellow that the corn ear clad fibre being prepared by said method is, and gum level is low, and powerful high, good dispersion, can replace other fibers for industry, as the padded coaming of making artificial 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
The present invention is described in detail to enumerate embodiment below.But the present invention is not subject to 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, these variations include in technical scope of the present invention.
Embodiment 1
Choose without the clean corn ear foreskin going mouldy, take 10g and put into beaker, according to bath raio 1:15, add 150ml running water, the hydrogen peroxide that to take 0.9g urea, 4g concentration be 30wt% joins in beaker, under the condition of 30 degree, act on 40 minutes, to, to the corn ear clad fibre compregnate that rolls, make solution can soak, fully infiltrate the inside to corn ear foreskin completely during this time.After pre-urine oxygen is finished dealing with, washing corn ear clad fibre, control is dry.
According to bath raio 1:20, add 200ml running water, add 5.6g NaOH, 0.4g sodium metasilicate, 0.4g sodium polyphosphate, use supersonic generator (ultrasonic frequency 33KHz), under the condition of 55 degree, to corn ear clad fibre effect 20 minutes.After ultrasonic wave alkali treatment completes, first through the hot water of 50 degree, wash, and then through 4-5 cold water washing, obtain 3.7g corn ear foreskin crude fibre.
According to bath raio 1:30, measure distilled water 111ml, take 0.083g pectase, 0.028g hemicellulase adds in 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.The fiber of crossing through cellulase treatment is washed in 50 degree hot water, made after biology enzyme inactivation, then wash through cold water, obtain the corn ear clad fibre that 3.2g gum level is low (recovery rate of fiber is 32.25% left and right), it is dried under 90 degree.
The physicochemical property of the corn ear clad fibre finally obtaining: residual gum content is in 21.6% left and right, and fineness is 210-235dtex, and fracture strength is 1.39-1.47cN/dtex.
Comparative example 1
Choose without the clean corn ear foreskin that goes mouldy, take 10g and put into beaker, according to bath raio 1:20, add 200ml running water, then add 6g NaOH, under the condition of 100 degree to corn ear clad fibre effect 20 minutes.After alkali treatment completes, first through the hot water of 50 degree, wash, and then through 4-5 cold water washing, obtain 2.58g corn ear foreskin crude fibre, under 90 degree, dry afterwards.The fiber obtaining is thick and stiff and crisp, poor flexibility, and residual gum content is in 31.7% left and right, and fineness is in 350dtex left and right, and fracture strength is 1.22cN/dtex left and right.
Comparative example 2
When alkali treatment, do not use ultrasonic wave and do not carry out biological enzyme degumming, in addition, process similarly to Example 1 corn ear clad fibre.Obtain 3.54g corn ear foreskin crude fibre, residual gum content is in 28.4% left and right, and fineness is in 295dtex left and right, and fracture strength is in 1.30cN/dtex left and right.
From above-mentioned result of the test, with alkali treatment method with the fiber that pre-urine oxygen processings-alkali treatment method obtains, compare, use the fiber residual gum content of method acquisition of the present invention low, good luster, fineness is good, more soft and flexible, intensity is high.
In addition, every physicochemical property of above-mentioned corn ear clad fibre is measured and is obtained by the following method:
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-4th part: fineness test method > >
3. fracture strength: GB/T18147.5-2000 < < hemp test method-5th part: fracture strength test method > >.
Claims (3)
1. a Degumming method for corn ear clad fibre, is characterized in that, described method comprises the steps:
(1) screening, without the corn ear foreskin going mouldy, is removed dust and foreign material on foreskin;
(2) corn ear clad fibre being urinated to oxygen in advance processes;
(3) under alkali condition, with ultrasonic wave, corn ear clad fibre is come unstuck;
(4) with biology enzyme, corn ear clad fibre is deeply come unstuck;
(5) dry the corn ear clad fibre that obtains coming unstuck;
In step (2), urea concentration is 5.5-6.5g/L, and hydrogen peroxide concentration is 7.5-8.5g/L, and treatment temperature is 30-40 degree, and the processing time is 40-50 minute, and bath raio is 1:15-20;
In step (4), use the mixed enzyme of pectase and hemicellulase, mixed enzyme concentration is 0.8-1.2g/L, the proportioning of pectase and hemicellulase is 2.5-3.5:1, and treatment temperature is 45-55 degree, and the processing time is 1-2 hour; bath raio is 1:25-35, and pH is 7-9.
2. method according to claim 1, it is characterized in that, in step (3), ultrasonic frequency is 33-55KHz, and alkali concn is 25-30g/L, and sodium silicate silicate is 1.5-2.2g/L, polyphosphoric acids na concn is 1.5-2.2g/L, treatment temperature is 50-60 degree, and the processing time is 20-25 minute, and bath raio is 1:15-20.
3. a corn ear clad fibre, is characterized in that, described corn ear clad fibre is that method according to claim 1 and 2 prepares.
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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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| CN102787372B true CN102787372B (en) | 2014-08-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN107099860B (en) * | 2017-03-21 | 2019-04-16 | 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113971A (en) * | 1994-06-17 | 1995-12-27 | 山东省东平***纺织总厂 | Technology for quickly hemp degumming |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113971A (en) * | 1994-06-17 | 1995-12-27 | 山东省东平***纺织总厂 | Technology for quickly hemp degumming |
Non-Patent Citations (4)
| Title |
|---|
| "从玉米棒***中提取纤维素纤维的研究";赵酒泉;《染整技术》;20110228;第33卷(第2期);第12-16页 * |
| "竹原纤维预处理工艺参数探讨";崔桂新等;《第八届功能性纺织品及纳米技术研讨会论文集》;20080401;第119-121页 * |
| 崔桂新等."竹原纤维预处理工艺参数探讨".《第八届功能性纺织品及纳米技术研讨会论文集》.2008,第119-121页. |
| 赵酒泉."从玉米棒***中提取纤维素纤维的研究".《染整技术》.2011,第33卷(第2期),第12-16页. |
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