CN112746335A - Preparation method of industrial hemp fiber powder and composite foam material and antibacterial composite insole - Google Patents
Preparation method of industrial hemp fiber powder and composite foam material and antibacterial composite insole Download PDFInfo
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- CN112746335A CN112746335A CN202011561644.XA CN202011561644A CN112746335A CN 112746335 A CN112746335 A CN 112746335A CN 202011561644 A CN202011561644 A CN 202011561644A CN 112746335 A CN112746335 A CN 112746335A
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- industrial hemp
- foaming
- composite
- fiber powder
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- 244000025254 Cannabis sativa Species 0.000 title claims abstract description 83
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 title claims abstract description 83
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 title claims abstract description 83
- 235000009120 camo Nutrition 0.000 title claims abstract description 83
- 235000005607 chanvre indien Nutrition 0.000 title claims abstract description 83
- 239000011487 hemp Substances 0.000 title claims abstract description 83
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 239000000835 fiber Substances 0.000 title claims abstract description 52
- 239000000843 powder Substances 0.000 title claims abstract description 35
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000006261 foam material Substances 0.000 title abstract description 5
- 238000005187 foaming Methods 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 46
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000002791 soaking Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 17
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 16
- 229920001194 natural rubber Polymers 0.000 claims abstract description 16
- 238000005406 washing Methods 0.000 claims abstract description 16
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 15
- 108010059820 Polygalacturonase Proteins 0.000 claims abstract description 14
- 108010093305 exopolygalacturonase Proteins 0.000 claims abstract description 14
- 229920002101 Chitin Polymers 0.000 claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 238000009835 boiling Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000003513 alkali Substances 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims description 41
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 21
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 16
- 238000010411 cooking Methods 0.000 claims description 15
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical group C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 12
- 239000003431 cross linking reagent Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000004088 foaming agent Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- 239000004156 Azodicarbonamide Substances 0.000 claims description 8
- 239000012752 auxiliary agent Substances 0.000 claims description 8
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical group NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims description 8
- 235000019399 azodicarbonamide Nutrition 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 238000010009 beating Methods 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 241000894006 Bacteria Species 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000000845 anti-microbial effect Effects 0.000 claims description 3
- 238000007723 die pressing method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 230000035939 shock Effects 0.000 abstract description 4
- 210000004243 sweat Anatomy 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 3
- 230000029663 wound healing Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 11
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 239000008399 tap water Substances 0.000 description 7
- 235000020679 tap water Nutrition 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 235000019359 magnesium stearate Nutrition 0.000 description 5
- 239000012670 alkaline solution Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
- A43B17/003—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined characterised by the material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0023—Use of organic additives containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0085—Use of fibrous compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2307/00—Characterised by the use of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Emergency Medicine (AREA)
- Inorganic Chemistry (AREA)
- Molecular Biology (AREA)
- Zoology (AREA)
- Textile Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The application discloses a preparation method of industrial hemp fiber powder and a composite foam material, and an antibacterial composite insole. The preparation method of the industrial hemp fiber powder comprises the following steps: (1) pretreating industrial hemp bast; (2) soaking the pretreated industrial hemp bast in a pectinase water solution; (3) placing the soaked industrial hemp bast in an alkali solution, adding hydrogen peroxide, boiling and performing microwave treatment; (4) and washing, drying and crushing the industrial hemp bast after the microwave treatment to obtain the industrial hemp fiber powder. The industrial hemp fiber powder, EVA, natural rubber and chitin are mixed to obtain the composite foaming material, and then the antibacterial composite insole is prepared, and has the advantages of wear resistance, air permeability, sweat absorption, good elasticity, good shock resistance, contribution to wound healing and the like.
Description
Technical Field
The application relates to a preparation method of industrial hemp fiber powder and a composite foam material and an antibacterial composite insole, belonging to the technical field of industrial hemp fibers.
Background
The insoles in the current market mainly comprise pure cotton insoles, pure hemp insoles, EVA insoles, natural rubber insoles and the like. Wherein, traditional hemp fiber shoe-pad is through the fibre entanglement lock together, and the fibrilia is more thick hard, and the cohesion difficulty, if the recurrence, the fibre is easily taken out from the non-woven fabrics, and the easy attenuate of hemp fiber shoe-pad even disintegrates, and antidetonation and resilience are poor, and the comfort is relatively poor simultaneously. Meanwhile, the traditional hemp fiber insole is easy to break and wrinkle and is easy to break. If the hemp fiber or the cotton linen fabric which is not completely degummed can also cause stabbing pain to people, and the comfort of wearing is influenced.
At present, insoles on the market basically adopt single EVA or natural rubber as raw materials, and although the EVA or the natural rubber is low in price and good in anti-seismic effect, the EVA or the natural rubber is not breathable and is easy to breed bacteria and mould. The latter is air permeable, wear resistant and resilient, but expensive and has poor shockproof effect.
Disclosure of Invention
Aiming at the defects of poor wear resistance, poor buffering effect, easy breeding of bacteria and mould and the like of the insole in the prior art, the invention provides the antibacterial composite insole which takes industrial hemp fiber powder, EVA, natural rubber and chitin as main materials and the preparation method thereof, and the prepared insole has the advantages of wear resistance, air permeability, sweat absorption, good elasticity, good shock resistance, favorable wound healing and the like.
According to a first aspect of the present application, a method of preparing industrial hemp fiber powder is provided.
A preparation method of industrial hemp fiber powder comprises the following steps:
(1) pretreating industrial hemp bast;
(2) soaking the pretreated industrial hemp bast in a pectinase water solution;
(3) placing the soaked industrial hemp bast in an alkali solution, adding hydrogen peroxide, boiling and performing microwave treatment;
(4) and washing, drying and crushing the industrial hemp bast after the microwave treatment to obtain the industrial hemp fiber powder.
Optionally, in step (1), the pre-processing includes: cutting industrial hemp bast into 5-10 cm segments, soaking in water for 12-36 h, beating, and washing for 5-15 min.
Specifically, in step (1), the pretreatment includes: cutting industrial hemp bast into 10cm pieces, soaking in water for 24 hr, beating, and washing for 5 min.
Optionally, in the step (2), the concentration of the aqueous solution of pectinase is 1.5-2.5 g/ml;
the soaking time is 30-60 min.
Specifically, in the step (2), the concentration of the aqueous solution of the pectinase is 2 g/ml;
the soaking time is 30 min.
Optionally, in the step (3), the content of sodium hydroxide in the alkaline cooking liquor is 8-12 g/l, and the content of hydrogen peroxide is 8-12 g/l.
Wherein the alkaline cooking solution is obtained by adding hydrogen peroxide into an alkaline solution and then boiling.
Specifically, in the step (3), the content of sodium hydroxide in the alkaline cooking liquor is 10g/l, and the content of hydrogen peroxide is 10 g/l.
Optionally, the microwave treatment conditions are: the microwave heating temperature is 85-100 ℃, and the time is 45-90 min.
Specifically, the conditions of the microwave treatment are as follows: the microwave heating temperature is 100 deg.C, and the time is 60 min.
Optionally, in the step (4), the industrial hemp fiber powder is obtained by sieving with a double-layer screen.
As a specific embodiment, the method for preparing industrial hemp fiber powder comprises the following steps:
(1) pretreating industrial hemp bast;
(2) soaking the industrial hemp bast obtained in the step 1 in a pectinase aqueous solution;
(3) putting the industrial hemp bast obtained in the step 2 into an alkaline cooking solution, and simultaneously starting microwaves;
(4) and (4) washing, drying and crushing the industrial hemp bast obtained in the step (3) to obtain the industrial hemp fiber powder.
The pretreatment in the step (1) is to cut fresh industrial hemp bast into 5-10 cm segments, put the segments into tap water for soaking for 12-36 h, beat and wash for 5-15 min.
The concentration of the aqueous solution of the pectinase in the step 2 is 1.5-2.5 g/ml; the soaking time is 30-60 min
Step 3, the content of sodium hydroxide in the alkaline cooking liquor is 10g/l, and the content of hydrogen peroxide is 10 g/l; the microwave heating temperature is 85-100 ℃, and the time is 45-90 min.
And 4, sieving the crushed particles with the particle size of 50-100 microns by adopting a double-layer screen.
According to a second aspect of the present application, there is provided an industrial hemp fiber powder prepared by the method for preparing an industrial hemp fiber powder described above.
The industrial hemp fiber powder prepared by the preparation method.
Optionally, the particle size of the industrial hemp fiber powder is 50-100 μm.
According to a third aspect of the present application, a method of preparing a composite foamed material is provided.
A method for preparing composite foaming material comprises mixing, tabletting and foaming the mixture containing industrial hemp fiber powder, ethylene-vinyl acetate copolymer, natural rubber and chitin;
the industrial hemp fiber powder is at least one selected from the industrial hemp fiber powder prepared by the preparation method.
Optionally, in the mixture, the components are used in the following amounts by weight:
optionally, the parts by weight of the industrial hemp fiber powder are independently selected from any value of 20, 22, 25, 28 and 30 or a range value between any two values.
Optionally, the parts by weight of the natural rubber are independently selected from any of 30, 35, 40, 45, 50 or a range between any two.
Optionally, the parts by weight of the ethylene-vinyl acetate copolymer is independently selected from any of 30, 35, 40, 45, 50 or a range between any two.
Optionally, the parts by weight of the chitin are independently selected from any of 5, 6, 7, 8, 9, 10 or a range between any two.
Optionally, the mixing comprises:
(a) mixing the mixture I to obtain a mixed material I;
(b) and mixing the mixed material I with a foaming agent, a cross-linking agent and a foaming auxiliary agent, and then continuing mixing the mixture II to obtain a mixed material II.
Optionally, in step (a), the mixing conditions of step I are: the temperature is 95-105 ℃, and the time is 10-20 min.
Specifically, the mixing I conditions are as follows: the temperature is 100 ℃ and the time is 10 min.
Optionally, in the step (b), the foaming agent, the crosslinking agent and the foaming assistant are, in parts by weight:
4-6 parts of foaming agent
0.4 to 0.6% of a crosslinking agent
And 2-3 of a foaming auxiliary agent.
Optionally, in step (b), the blowing agent is selected from azodicarbonamide.
Optionally, the cross-linking agent is selected from dicumyl peroxide.
Optionally, the foaming aid is selected from zinc oxide.
Optionally, in step (b), the mixing II conditions are: the temperature is 95-105 ℃, and the time is 3-5 min.
Specifically, the mixing conditions of II are as follows: the temperature is 100 ℃, and the time is 3-5 min.
Specifically, the mixing conditions of II are as follows: the temperature is 100 ℃ and the time is 5 min.
Optionally, the tabletting is to press the kneaded material II obtained by kneading to obtain a sheet, and the thickness of the sheet is 1 to 2 mm.
In particular, the thickness of the sheet is 1.5 mm.
Optionally, the foaming treatment comprises: and adding the slices obtained by tabletting into a mould for mould pressing foaming to obtain the composite foaming material.
Optionally, the conditions of the die-pressing foaming are as follows: the temperature is 155-160 ℃, the pressure is 15-20 MPa, and the time is 400-700 s.
Specifically, the conditions of the die-pressing foaming are as follows: the temperature was 155 ℃, the pressure 15MPa, and the time 700 s.
As a specific embodiment, the preparation method of the composite foaming material comprises the following steps:
step 1:
mixing the obtained industrial hemp fiber powder, natural rubber, ethylene-vinyl acetate copolymer and chitin, and then mixing to obtain a mixed material I.
The mixing is carried out in a rubber internal mixer, and the mixture is preheated to more than 70 ℃ in advance before being added, preferably 80-85 ℃; the mixing temperature is about 100 ℃, and the mixing time is 10-20 min;
step 2:
and adding a foaming agent, a cross-linking agent and a foaming auxiliary agent into the mixed material I, and continuously mixing to obtain a mixed material II.
The mass ratio of the foaming agent to the cross-linking agent to the foaming auxiliary agent is 5:0.5: 2.5;
the foaming agent, the cross-linking agent and the foaming auxiliary agent are azodicarbonamide, dicumyl peroxide (DCP) and zinc oxide respectively, and the mixing time is 3-5 min.
And step 3:
pressing the mixture II obtained in the step 2 into a 1-2 mm slice.
And 4, step 4:
and (3) adding the sheet obtained in the step (3) into a mould for mould pressing foaming (stearate is added in advance as a release agent), so as to obtain the industrial hemp fiber powder-EVA-natural rubber composite foaming material.
The forming temperature is 155-160 ℃, the forming pressure is 15-20 MPa, the forming time is 400-700 s, and the composite foam material is obtained after cooling and forming.
According to a fourth aspect of the present application, an antimicrobial composite insole is provided.
An antibacterial composite insole is prepared by cutting composite foaming material;
the composite foaming material is at least one selected from the composite foaming materials prepared by the preparation method.
Optionally, the antibacterial composite insole has a resilience of 55% to 65%.
Optionally, the moisture absorption rate of the antibacterial composite insole is 30% -40%.
Optionally, the antibacterial composite insole has a bacteria reduction rate of 90% to 99%.
In the present application, "EVA" refers to an ethylene-vinyl acetate copolymer.
The beneficial effects that this application can produce include:
the preparation method of the industrial hemp fiber powder has the characteristics of simplicity and convenience. The composite foaming material prepared by the preparation method of the composite foaming material can be conveniently prepared into the antibacterial composite insole through cutting, the composite foaming material is comprehensively mixed by industrial hemp fiber powder, EVA, natural rubber and chitin, and the prepared antibacterial composite insole has the advantages of wear resistance, air permeability, sweat absorption, good elasticity, good shock resistance, contribution to wound healing and the like.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
The raw materials in the examples of the present application were all purchased commercially, unless otherwise specified. If not stated, the test method adopts the conventional method, and the instrument setting adopts the setting recommended by the manufacturer.
In the examples, the parts used for the raw materials are parts by weight.
Example 1
Preparing industrial hemp crude fiber
Cutting fresh industrial hemp bast into 10cm segments, soaking in tap water for 24h, beating, washing for 5min, soaking the obtained industrial hemp bast segments in a pectinase water solution for 30min (the concentration of the pectinase water solution is 2g/ml), washing for 10min, placing the washed industrial hemp bast segments in an alkaline cooking solution at 100 ℃ (the content of sodium hydroxide in the alkaline cooking solution is 10g/l, the content of hydrogen peroxide is 10g/l, the alkaline cooking solution is obtained by adding hydrogen peroxide into an alkaline solution and then boiling), starting microwaves for 60min, washing the obtained industrial hemp bast with tap water at room temperature for 10min, and drying to obtain dry industrial hemp crude fibers.
(II) preparing composite insole
Pulverizing industrial hemp crude fiber into industrial hemp fiber powder (25 weight parts) with particle size of 50 μm; then transferring the mixture into a mixing roll (the temperature is 100 ℃), simultaneously adding natural rubber (40 weight parts), ethylene-vinyl acetate copolymer (40 weight parts) and chitin (8 weight parts), mixing and then mixing for 10min to obtain a first mixed material; adding azodicarbonamide (5 weight parts), dicumyl peroxide (DCP) (0.5 weight parts) and zinc oxide (2.5 weight parts) into the first mixed material, and mixing at 100 deg.C for 5min to obtain second mixed material; pressing the mixed material II into a sheet with the thickness of 1.5mm, ensuring that the sheet is uniform in thickness, and naturally cooling the sheet; and moving the insole to a foaming machine, smearing a proper amount of magnesium stearate on a mould, foaming the sheet at the temperature of 155 ℃ and under the pressure of 15MPa for 700s, and cooling and cutting after foaming to obtain the antibacterial composite insole.
Example 2
Preparing industrial hemp crude fiber
Cutting fresh industrial hemp bast into 10cm segments, soaking in tap water for 24h, beating, washing for 5min, soaking the obtained industrial hemp bast segments in a pectinase water solution for 30min (the concentration of the pectinase water solution is 2g/ml), washing for 10min, placing the washed industrial hemp bast segments in an alkaline cooking solution at 100 ℃ (the content of sodium hydroxide in the alkaline cooking solution is 10g/l, the content of hydrogen peroxide is 10g/l, the alkaline cooking solution is obtained by adding hydrogen peroxide into an alkaline solution and then boiling), starting microwaves for 60min, washing the obtained industrial hemp bast with tap water at room temperature for 10min, and drying to obtain dry industrial hemp crude fibers.
(II) preparing composite insole
Pulverizing hemp crude fiber into industrial hemp fiber powder (20 weight parts) with particle size of 50 μm; then transferring the mixture into a mixing roll (the temperature is 100 ℃), simultaneously adding natural rubber (30 parts by weight), ethylene-vinyl acetate copolymer (30 parts by weight) and chitin (5 parts by weight), mixing and then mixing for 10min to obtain a first mixed material; adding azodicarbonamide (4 weight parts), dicumyl peroxide (DCP) (0.4 weight parts) and zinc oxide (2 weight parts) into the first mixed material, and mixing at 100 deg.C for 5min to obtain a second mixed material; pressing the mixed material into a sheet with the thickness of 1.5mm, ensuring the uniform thickness of the sheet, and naturally cooling the sheet; and moving to a foaming machine, coating a proper amount of magnesium stearate on a mould, foaming the sheet at the temperature of 155 ℃ and under the pressure of 15MPa for 700s, and cooling and cutting after foaming to obtain the composite insole.
Example 3
Preparing industrial hemp crude fiber
Cutting fresh industrial hemp bast into 10cm segments, soaking in tap water for 24h, beating, washing for 5min, soaking the obtained industrial hemp bast segments in a pectinase water solution for 30min (the concentration of the pectinase water solution is 2g/ml), washing for 10min, placing the washed industrial hemp bast segments in an alkaline cooking solution at 100 ℃ (the content of sodium hydroxide in the alkaline cooking solution is 10g/l, the content of hydrogen peroxide is 10g/l, the alkaline cooking solution is obtained by adding hydrogen peroxide into an alkaline solution and then boiling), starting microwaves for 60min, washing the obtained industrial hemp bast with tap water at room temperature for 10min, and drying to obtain dry industrial hemp crude fibers.
(II) preparing composite insole
Pulverizing hemp crude fiber into industrial hemp fiber powder (30 weight parts) with particle size of 50 μm; then transferring the mixture into a mixing roll (the temperature is 100 ℃), simultaneously adding natural rubber (50 parts by weight), ethylene-vinyl acetate copolymer (50 parts by weight) and chitin (10 parts by weight), mixing and then mixing for 10min to obtain a first mixed material; adding azodicarbonamide (6 weight parts), dicumyl peroxide (DCP) (0.6 weight parts) and zinc oxide (3 weight parts) into the first mixed material, and mixing at 100 deg.C for 5min to obtain second mixed material; pressing the mixed material into a sheet with the thickness of 1.5mm, ensuring the uniform thickness of the sheet, and naturally cooling the sheet; transferring to a foaming machine, simultaneously coating a proper amount of magnesium stearate on a mould, carrying out foaming treatment on the sheet for 700s at the temperature of 155 ℃ and under the pressure of 15MPa, and cooling and cutting after foaming.
Comparative example 1
Adding natural rubber (100 weight parts), azodicarbonamide (5 weight parts), dicumyl peroxide (DCP) (0.5 weight parts), and zinc oxide (2.5 weight parts) into a mixer, and mixing at 100 deg.C for 10min to obtain a first mixed material; pressing the mixed material into a sheet with the thickness of 1.5mm, ensuring the uniform thickness of the sheet, and naturally cooling the sheet; and moving the insole to a foaming machine, smearing a proper amount of magnesium stearate on a mould, foaming the sheet at the temperature of 155 ℃ and under the pressure of 15MPa for 600s, and cooling and cutting after foaming to obtain the antibacterial composite insole.
Comparative example 2
Adding ethylene-vinyl acetate copolymer (100 parts by weight), azodicarbonamide (5 parts by weight), dicumyl peroxide (DCP) (0.5 part by weight) and zinc oxide (2.5 parts by weight) into a mixing mill, and mixing at 100 ℃ for 10min to obtain a first mixed material; pressing the mixed material into a sheet with the thickness of 1.5mm, ensuring the uniform thickness of the sheet, and naturally cooling the sheet; moving to a foaming machine, coating a proper amount of magnesium stearate on a mould, foaming the sheet at the temperature of 155 ℃ and the pressure of 15MPa for 600s, and cooling and cutting after foaming.
Comparative example 3
The mass ratio of the fibrilia obtained in the example to the polypropylene filament is 1: 1 mixing to obtain a non-woven fabric insole primary die, and then cutting into a fibrilia insole with the thickness of about 0.5 cm.
(III) test and detection
The antibacterial composite insole prepared by the method is subjected to the following index detection:
rebound resilience: GB/T10652-2001;
antibacterial property: SHAKE FLASK method antibacterial test
Moisture absorption rate: the following method was used.
1) Testing instrument
Electronic balance (accuracy 0.001g), stopwatch, hook, tray, beaker, glass rod, distilled water.
2) Experimental procedures and results calculation
2.1) sampling: five blocks were sampled in parallel, each 5cm x 5cm square.
2.2) weighing: at constant temperature, humidity (20 ℃, 60%), left for 24h, weighed and recorded as G0 to the nearest 0.001G.
2.3) testing: putting the weighed sample into a container filled with 2-3L of distilled water, and testing the temperature of the water (20 +/-2) DEG C. The sample was pressed into water with a glass rod until it was completely submerged in water for 20 min.
2.4) wet weight: the sample was taken out after being completely soaked in water, the surface water was absorbed by filter paper, and the weight was recorded as G1 to the nearest 0.001G.
2.5) calculating:
calculating the moisture absorption rate according to the formula 1, reserving two effective figures, and taking the average value of five times as the test result of the sample:
w is moisture absorption rate;
g1-weight of sample before infiltration in G;
g0-weight of sample after wetting in G.
Through detection of all indexes of the antibacterial composite insole, the rebound resilience of the antibacterial composite insole prepared in the embodiment of the application is superior to that of the antibacterial composite insole in comparative example 2 and comparative example 3; the antibacterial performance of the antibacterial composite insole prepared in the embodiment of the application is superior to that of the comparative example 2 and the comparative example 3; the moisture absorption rate of the antibacterial composite insole prepared in the embodiment of the application is superior to that of the comparative example 1, and the antibacterial composite insole provided by the application has the advantages of wear resistance, ventilation, sweat absorption, good elasticity, good shock resistance and the like.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (10)
1. A preparation method of industrial hemp fiber powder is characterized by comprising the following steps:
(1) pretreating industrial hemp bast;
(2) soaking the pretreated industrial hemp bast in a pectinase water solution;
(3) placing the soaked industrial hemp bast in an alkali solution, adding hydrogen peroxide, boiling and performing microwave treatment;
(4) and washing, drying and crushing the industrial hemp bast after the microwave treatment to obtain the industrial hemp fiber powder.
2. The production method according to claim 1, wherein in the step (1), the pretreatment includes: cutting industrial hemp bast into 5-10 cm segments, soaking in water for 12-36 h, beating, and washing for 5-15 min.
3. The method according to claim 1, wherein in the step (2), the concentration of the aqueous solution of pectinase is 1.5-2.5 g/ml;
the soaking time is 30-60 min.
4. The preparation method according to claim 1, wherein in the step (3), the content of sodium hydroxide in the alkaline cooking liquor is 8-12 g/l, and the content of hydrogen peroxide is 8-12 g/l;
the microwave treatment conditions are as follows: the microwave heating temperature is 85-100 ℃, and the time is 45-90 min.
5. An industrial hemp fiber powder obtained by the production method according to any one of claims 1 to 4, wherein the particle diameter of the industrial hemp fiber powder is 50 to 100 μm.
6. The preparation method of a composite foaming material is characterized in that the composite foaming material is prepared by mixing, tabletting and foaming a mixture containing industrial hemp fiber powder, ethylene-vinyl acetate copolymer, natural rubber and chitin;
the industrial hemp fiber powder is at least one selected from industrial hemp fiber powders prepared by the preparation method according to any one of claims 1 to 4.
7. The method according to claim 6, wherein the following components are used in the mixture in parts by weight:
8. the method of claim 6, wherein the mixing comprises:
(a) mixing the mixture I to obtain a mixed material I;
(b) mixing the mixed material I with a foaming agent, a cross-linking agent and a foaming auxiliary agent, and then continuing mixing II to obtain a mixed material II;
preferably, in step (a), the mixing I conditions are as follows: the temperature is 95-105 ℃, and the time is 10-20 min;
preferably, in the step (b), the foaming agent, the crosslinking agent and the foaming assistant are as follows in parts by weight:
4-6 parts of foaming agent
0.4 to 0.6% of a crosslinking agent
2-3 of a foaming auxiliary agent;
preferably, in step (b),
the foaming agent is selected from azodicarbonamide;
the cross-linking agent is selected from dicumyl peroxide;
the foaming auxiliary agent is selected from zinc oxide;
preferably, in the step (b), the mixing II conditions are as follows: the temperature is 95-105 ℃, and the time is 3-5 min;
preferably, the tabletting is to press the mixed material II obtained by mixing to obtain a sheet, and the thickness of the sheet is 1-2 mm;
preferably, the foaming treatment comprises: adding the slices obtained by tabletting into a mould for mould pressing foaming to obtain the composite foaming material;
preferably, the conditions of the die-pressing foaming are as follows: the temperature is 155-160 ℃, the pressure is 15-20 MPa, and the time is 400-700 s.
9. An antibacterial composite insole is characterized in that a composite foaming material is cut;
the composite foaming material is at least one selected from composite foaming materials prepared by the preparation method according to any one of claims 6 to 8.
10. The antimicrobial composite insole of claim 9, wherein said antimicrobial composite insole has a resilience of 55% to 65%;
the moisture absorption rate of the antibacterial composite insole is 30-40%;
the bacteria reduction rate of the antibacterial composite insole is 90-99%.
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