CN107386013A - A kind of degradable straw board and preparation method thereof, application - Google Patents
A kind of degradable straw board and preparation method thereof, application Download PDFInfo
- Publication number
- CN107386013A CN107386013A CN201710583404.1A CN201710583404A CN107386013A CN 107386013 A CN107386013 A CN 107386013A CN 201710583404 A CN201710583404 A CN 201710583404A CN 107386013 A CN107386013 A CN 107386013A
- Authority
- CN
- China
- Prior art keywords
- stalk
- preparation
- degradable
- degradable straw
- board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J1/00—Fibreboard
- D21J1/16—Special fibreboard
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0262—Mulches, i.e. covering material not-pre-formed in mats or sheets
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
- D21J3/12—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of sheets; of diaphragms
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a kind of preparation method of degradable straw board, comprise the following steps:By crops stalk crushing into stalk section;Stalk section is placed in water immersion;Stalk section after immersion is beaten to obtain stalk slurries;Stalk slurries are heated, insulation obtains pretreatment material;Pretreatment material is placed in progress hot pressing in mould and obtains degradable straw board.For the present invention by using crop straws for producing biomass board, method is feasible, and technique is simple, and cost is cheap, is easy to mass produce;And production process can be degradable without adhesive, gained biological material, suitable for fields such as construction material, packaging material and Farm Land films.Gained panel density of the invention is 0.93~1.12g/cm3, bending strength is 34~52MPa, and tensile strength is 19~29MPa, has reached No. 30 hard plate levels of JIS standards.
Description
Technical field
The present invention relates to biomass board technical field, more particularly to a kind of degradable straw board and preparation method thereof,
Using.
Background technology
Chinese the average coverage of forest for each person is only 0.1 hectare or so, about the world per capita horizontal 20%, per capita
It is about 9 cubic metres to occupy forest reserves, belongs to the few country of timber resources in the world.Corresponding, China is again generation
Breach is increasingly existing for the industrial requirement of one of larger country of wooden boards consumption in boundary, domestic log yield and timber
Increase.
China is a large agricultural country, and for the annual total sown area of crops more than 160,000 thousand hectares, total output of grain is 600,000,000 tons
Left and right, about produce 1,000,000,000 tons or so of crop straw refuse.The main chemical compositions content of agricultural crop straw is (i.e. fine
Dimension element, hemicellulose and lignin) it is similar to timber, it can be used for substituting timber manufacture wood-based plate completely.In petroleum resources day
Beneficial exhausted and stalk is administered under increasingly urgent overall situation, and being one using agricultural crop straw for the degradable sheet material of raw material production has
The beneficial thing without disadvantage.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of degradable straw board and its preparation side
Method, application, by using crop straws for producing biomass board, method is feasible, and technique is simple, and cost is cheap, is easy to advise greatly
Mould produces;And production process can be degradable without adhesive, gained biological material, suitable for construction material, packaging material
With the field such as Farm Land film.
A kind of preparation method of degradable straw board proposed by the present invention, comprises the following steps:
S1, stalk is ground into stalk section;
S2, stalk section is placed in water immersion;The process of immersion causes fiber softening and swollen, produces the fiber of swollen
It is not easy to be cut off;And the reason for fibre swelling is due to contained polar hydroxyl groups and water in cellulose and hemicellulose molecule structure
Molecule polarization attracts, and hydrone enters the amorphous region of cellulose, and distance increases between making cellulose molecular chain, so as to draw
Play fibre deformation;
S3, the stalk section after immersion is beaten using fiberizer to obtain stalk slurries;Mechanical jordaning method separates fiber
Uniformly, separating degree is higher;Because the manufacture extremely important step of biomass board is fiber separation to be carried out, stalk is by grinding point
Separate out substantial amounts of fine fibre, microfibre, the external surface area of fiber greatly increases after brooming, is easy to the combination between fiber to hand over
Knit;
S4, stalk slurries are heated, insulation obtains pretreatment material;Disappear it is latent after fiber stretch open, increase during pressed sheet
Large access area, be advantageous to the combination of fiber;
S5, will pretreatment material be placed in mould carry out hot pressing obtain degradable straw board;Interfibrous water is extruded in hot pressing
Point so that fiber interweaving combines, and ultimately forms the sheet material with certain mechanical strength.
Preferably, in S1, stalk uses rape stalk.
Preferably, in S1, the average length of stalk section is 0.5-1.5cm.
4th, according to the preparation method of any one of the claim 1-3 degradable straw boards, it is characterised in that in S2,
Water temperature is room temperature.
Preferably, in S2, soak time 70-74h.
Preferably, in S4, stalk slurries are carried out to be heated to 85-95 DEG C, insulation 28-32min obtains pretreatment material.
Preferably, in S5, hot pressing temperature is 108-112 DEG C, and hot pressing pressure is 2-8Mpa.
A kind of degradable straw board that the present invention also proposes, using the preparation method system of above-mentioned degradable straw board
.
The above-mentioned degradable straw board that the present invention also proposes is as construction material, packaging material or Farm Land film
Application.
The present invention uses crop straws for producing biomass board, and method is feasible, and technique is simple, and cost is cheap, is easy to big
Large-scale production;And production process can be degradable without adhesive, gained biological material, suitable for construction material, packing timber
The field such as material and Farm Land film.
It is 0.93~1.12g/ according to panel density made from the preparation method of degradable straw board provided by the invention
cm3, bending strength is 34~52MPa, and tensile strength is 19~29MPa, has reached the hard plate level of JIS standards.
Brief description of the drawings
Fig. 1 is the degradable straw board of the gained of the embodiment of the present invention 4.
Fig. 2 is hot-pressing tool used in the present invention;Wherein A is mould, and B is copper billet, and C is aluminium flake, and D is metal screen.
Fig. 3 is that the embodiment of the present invention 4 is carried out in Mechanics Performance Testing, crooked test test film scale diagrams.
Fig. 4 is that the embodiment of the present invention 4 is carried out in Mechanics Performance Testing, extension test test film scale diagrams.
Fig. 5 is the compression strength and the graph of a relation of hot pressing pressure of the degradable straw board of the gained of the embodiment of the present invention 4.
Fig. 6 is the tensile strength and the graph of a relation of hot pressing pressure of the degradable straw board of the gained of the embodiment of the present invention 4.
Embodiment
Below, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of preparation method of degradable straw board proposed by the present invention, comprises the following steps:
S1, stalk is ground into stalk section;
S2, stalk section is placed in water immersion;
S3, the stalk section after immersion is beaten using fiberizer to obtain stalk slurries;
S4, stalk slurries are heated, insulation obtains pretreatment material;
S5, will pretreatment material be placed in mould carry out hot pressing obtain degradable straw board.
Embodiment 2
A kind of preparation method of degradable straw board proposed by the present invention, comprises the following steps:
S1, corn stalk powder is broken into the stalk section that average length is 0.5-1.5cm;
S2, stalk section is placed in room temperature water and soaks 70h;
S3, the stalk section after immersion is beaten using fiberizer to obtain stalk slurries;
S4, stalk slurries be heated to 95 DEG C, insulation 28min obtains pretreatment material;
S5, pretreatment material is placed in mould and carries out hot pressing, hot pressing temperature is 112 DEG C, and hot pressing pressure is 2Mpa, and obtaining can
Degrading straw sheet material.
Embodiment 3
A kind of preparation method of degradable straw board proposed by the present invention, comprises the following steps:
S1, rice straw is ground into the stalk section that average length is 0.5-1.5cm;
S2, stalk section is placed in room temperature water and soaks 74h;
S3, the stalk section after immersion is beaten using fiberizer to obtain stalk slurries;
S4, stalk slurries be heated to 85 DEG C, insulation 32min obtains pretreatment material;
S5, pretreatment material is placed in mould and carries out hot pressing, hot pressing temperature is 108 DEG C, and hot pressing pressure is 8Mpa, and obtaining can
Degrading straw sheet material.
Embodiment 4
A kind of preparation method of degradable straw board proposed by the present invention, comprises the following steps:
S1, rape stalk is ground into the stalk section that average length is 1cm;
S2, stalk section is placed in room temperature water and soaks 72h;The process of immersion causes fiber softening and swollen, produces profit
Swollen fiber is not easy to be cut off;And the reason for fibre swelling is due to contained polarity in cellulose and hemicellulose molecule structure
Hydroxyl attracts with hydrone polarization, and hydrone enters the amorphous region of cellulose, and distance increases between making cellulose molecular chain
Greatly, so as to causing fibre deformation;
S3, the stalk section after immersion is beaten using fiberizer to obtain stalk slurries;Mechanical jordaning method separates fiber
Uniformly, separating degree is higher;Because the manufacture extremely important step of biomass board is fiber separation to be carried out, stalk is by grinding point
Separate out substantial amounts of fine fibre, microfibre, the external surface area of fiber greatly increases after brooming, is easy to the combination between fiber to hand over
Knit;
S4, stalk slurries be heated to 90 DEG C, insulation 30min obtains pretreatment material;Make to disappear it is latent after fiber stretch open,
Increase contact area during pressed sheet, be advantageous to the combination of fiber;
S5,500mL pretreatment material are placed in mould and carry out hot pressing, extrude interfibrous moisture so that fiber interweaving knot
Close, hot pressing temperature is 110 DEG C, and hot pressing pressure is 5Mpa, obtains degradable straw board, as shown in Figure 1.
Wherein hot-pressing tool is as shown in Fig. 2 including mould and aid;Mould is stainless steel material, long 100mm, wide
100mm, deep 40mm;Aid includes:One copper briquetting (100 × 100 × 25mm), an aluminium flake (100 × 100mm) and
Two panels metal gauze (100 × 100mm), pretreatment material are placed among two panels gauze.In order to evaporate moisture, mould, copper briquetting and
Aluminium flake carries a diameter of 2mm, at intervals of 7 × 7mm some apertures.
The degradable straw board of the gained of the embodiment of the present invention 4 is subjected to mechanical property test, stretching uses with bend test
Electronic universal mechanics machine (ETM103A, ten thousand survey, China) detection, bend test piece and tension test chip size are respectively such as Fig. 3
With (unit mm) shown in Fig. 4.Test method and standard are as shown in the table:
The calculating of bend test according to formula (1),
σbFor bending strength, P is applies load, and LS is support span, and b is sheet metal thickness, and a is specimen width.
The calculating of tension test according to formula (2),
σ is tensile strength, and for P to apply load, A is the area of test specimen.
The test data of the degradable straw board of the gained of the embodiment of the present invention 4 is as follows:
As obtained by above-mentioned experiment can be seen that the embodiment of the present invention 4 bending strength of degradable straw board be 34~
52MPa, tensile strength are 19~29MPa, meet the requirement of No. 30 sheet material of JIS standards.Gained biomass board of the invention
Bending strength and tensile strength increase (hot pressing pressure is declined slightly when being 6.5MPa) with the increase of hot pressing pressure.
The present invention uses crop straws for producing biomass board, and method is feasible, and technique is simple, and cost is cheap, is easy to big
Large-scale production;And production process can be degradable without adhesive, gained biological material, suitable for construction material, packing timber
The field such as material and Farm Land film.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (9)
1. a kind of preparation method of degradable straw board, it is characterised in that comprise the following steps:
S1, stalk is ground into stalk section;
S2, stalk section is placed in water immersion;
S3, the stalk section after immersion is beaten to obtain stalk slurries;
S4, stalk slurries are heated, insulation obtains pretreatment material;
S5, will pretreatment material be placed in mould carry out hot pressing obtain degradable straw board.
2. the preparation method of degradable straw board according to claim 1, it is characterised in that in S1, stalk uses rape
Stalk.
3. the preparation method of degradable straw board according to claim 1 or claim 2, it is characterised in that in S1, stalk section is put down
Equal length is 0.5-1.5cm.
4. according to the preparation method of any one of the claim 1-3 degradable straw boards, it is characterised in that in S2, water temperature
For room temperature.
5. according to the preparation method of any one of the claim 1-4 degradable straw boards, it is characterised in that in S2, immersion
Time is 70-74h.
6. according to the preparation method of any one of the claim 1-5 degradable straw boards, it is characterised in that in S4, by straw
Stalk slurries carry out being heated to 85-95 DEG C, and insulation 28-32min obtains pretreatment material.
7. according to the preparation method of any one of the claim 1-6 degradable straw boards, it is characterised in that in S5, hot pressing
Temperature is 108-112 DEG C, and hot pressing pressure is 2-8Mpa.
8. a kind of degradable straw board, it is characterised in that using any one of the claim 1-6 degradable straw boards
Preparation method is made.
9. a kind of degradable straw board as claimed in claim 8 is as construction material, packaging material or Farm Land film
Application.
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CN201710583404.1A CN107386013A (en) | 2017-07-18 | 2017-07-18 | A kind of degradable straw board and preparation method thereof, application |
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CN201710583404.1A CN107386013A (en) | 2017-07-18 | 2017-07-18 | A kind of degradable straw board and preparation method thereof, application |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109929260A (en) * | 2019-03-13 | 2019-06-25 | 徐艳军 | A method of environment-friendly degradable polymerization sheet is manufactured using agriculture and forestry organic waste material |
CN110800572A (en) * | 2019-11-18 | 2020-02-18 | 安徽省舒城县舒丰现代农业科技开发有限责任公司 | Yield-increasing and efficiency-improving asparagus cultivation method |
CN113089382A (en) * | 2021-03-12 | 2021-07-09 | 海南大学 | Self-gluing fully-degradable organic covering pad and manufacturing method thereof |
CN113445370A (en) * | 2021-07-13 | 2021-09-28 | 中国农业科学院麻类研究所 | Glue-free straw material, preparation method and application thereof |
CN113512217A (en) * | 2021-07-22 | 2021-10-19 | 东华大学 | Clean production method of straw-based mulching film |
CN114368053A (en) * | 2022-01-25 | 2022-04-19 | 浙江省林业科学研究院 | High-viscosity flowing state fiber suspension and preparation method and application thereof |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109929260A (en) * | 2019-03-13 | 2019-06-25 | 徐艳军 | A method of environment-friendly degradable polymerization sheet is manufactured using agriculture and forestry organic waste material |
CN110800572A (en) * | 2019-11-18 | 2020-02-18 | 安徽省舒城县舒丰现代农业科技开发有限责任公司 | Yield-increasing and efficiency-improving asparagus cultivation method |
CN113089382A (en) * | 2021-03-12 | 2021-07-09 | 海南大学 | Self-gluing fully-degradable organic covering pad and manufacturing method thereof |
CN113089382B (en) * | 2021-03-12 | 2022-08-09 | 海南大学 | Self-gluing fully-degradable organic covering pad and manufacturing method thereof |
CN113445370A (en) * | 2021-07-13 | 2021-09-28 | 中国农业科学院麻类研究所 | Glue-free straw material, preparation method and application thereof |
CN113512217A (en) * | 2021-07-22 | 2021-10-19 | 东华大学 | Clean production method of straw-based mulching film |
CN114368053A (en) * | 2022-01-25 | 2022-04-19 | 浙江省林业科学研究院 | High-viscosity flowing state fiber suspension and preparation method and application thereof |
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Application publication date: 20171124 |