CN105671937A - Modification method of ramie fibers using as environment-friendly composite material reinforcement - Google Patents
Modification method of ramie fibers using as environment-friendly composite material reinforcement Download PDFInfo
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- CN105671937A CN105671937A CN201610046128.0A CN201610046128A CN105671937A CN 105671937 A CN105671937 A CN 105671937A CN 201610046128 A CN201610046128 A CN 201610046128A CN 105671937 A CN105671937 A CN 105671937A
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- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 230000002787 reinforcement Effects 0.000 title claims abstract description 25
- 239000000835 fiber Substances 0.000 title abstract description 31
- 240000008564 Boehmeria nivea Species 0.000 title abstract 9
- 238000002715 modification method Methods 0.000 title abstract 4
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000000243 solution Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 10
- 239000012153 distilled water Substances 0.000 claims abstract description 8
- 239000003513 alkali Substances 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 38
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 238000007598 dipping method Methods 0.000 claims description 14
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 14
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 11
- 229910000077 silane Inorganic materials 0.000 claims description 11
- 238000013019 agitation Methods 0.000 claims description 9
- 239000003153 chemical reaction reagent Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 241001649247 Boehmeria Species 0.000 claims description 3
- 239000002585 base Substances 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 238000002791 soaking Methods 0.000 abstract 2
- 239000006087 Silane Coupling Agent Substances 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 238000007781 pre-processing Methods 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 18
- 229920005989 resin Polymers 0.000 description 18
- 238000005452 bending Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000000465 moulding Methods 0.000 description 8
- 239000011160 polymer matrix composite Substances 0.000 description 8
- 229920013657 polymer matrix composite Polymers 0.000 description 8
- 229920006387 Vinylite Polymers 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 230000037452 priming Effects 0.000 description 6
- 238000010998 test method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- 229960000583 acetic acid Drugs 0.000 description 5
- 239000007822 coupling agent Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000001913 cellulose Substances 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 4
- 244000227473 Corchorus olitorius Species 0.000 description 3
- 235000010206 Corchorus olitorius Nutrition 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 244000082204 Phyllostachys viridis Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical group CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 1
- 240000004246 Agave americana Species 0.000 description 1
- 244000198134 Agave sisalana Species 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011174 green composite Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001814 pectin Substances 0.000 description 1
- 229920001277 pectin Polymers 0.000 description 1
- 235000010987 pectin Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
- D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
- D06M13/51—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond
- D06M13/513—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/10—Repellency against liquids
- D06M2200/12—Hydrophobic properties
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention relates to a modification method of ramie fibers using as environment-friendly composite material reinforcement.The modification method includes: cutting the ramie fibers, soaking the ramie fibers with concentrated alkali for preprocessing, adjusting pH to be neutral, washing with distilled water, and naturally airing under room temperature to obtain preliminarily processed ramie fibers; placing nano silicon dioxide into the ethanol aqueous solution of silane coupling agent KH-570, magnetically stirring, soaking the preliminarily processed ramie fibers into the solution, taking out, naturally airing under room temperature, and further drying in an oven to obtain modified ramie fibers.The modification method has the advantages that the ramie fibers are used as the composite material reinforcement, the advantage that China is rich in ramie fiber resources is fully utilized, and economy and environmental protection are achieved; a compositing method using VARI forming is used, curing is performed under room temperature, and simpleness in operation and low cost are achieved; measurement show that the composite material prepared by the method is excellent in interface and mechanical performance, and actual application value is achieved.
Description
Technical field
The present invention relates to composite and preparation field thereof, particularly relate to the method for modifying of a kind of ramee as environment friendly composite material reinforcement.
Background technology
In recent years, along with international energy growing tension and the environmental problem grown with each passing day, the research of energy-conserving and environment-protective technology increasingly comes into one's own. Natural plant fibre has the superior characteristics such as light specific gravity, intensity is high, modulus is high, cheap, biodegradable, the natural plant fibre adopting nature abundant replaces traditional glass fibre etc. to strengthen polymer matrix composite, environmentally friendly and recoverable ecological composite material can be prepared, have broad application prospects. In fibre of flax for textile material fiber, Boehmeria performance is especially prominent, and its content of cellulose is high, intensity is big, fibre length length, belong to high performance natural plant fibre, is well suited for doing the reinforcement of polymer matrix composites.
Due between ramee element macromole and there is substantial amounts of hydrogen bond in macromole, cellulosic form and reactive impact is bigger, its degree of crystallinity and the degree of orientation are high, organic solvent water insoluble and general at normal temperatures, is also insoluble in dilute alkaline soln, and cellulose can carry out a series of relating to hydroxyl reaction, the chemical reaction such as including cellulosic esterification, etherificate, graft copolymerization and crosslinking, and when contacting with oxidant etc., it may occur that oxidation, generate the material that a series of and original fibre structure is different. In addition, the microstructure that the special loose porous three dimensional structure of ramee makes nanometer fine particle easily enter ramee, and be combined with ramee, improve mechanical property and the hydrophobicity of ramee, be conducive to the compatibility improving fiber with matrix material, make fiber play the effect of effective reinforced composite.
At present, China's Green Composites wins initial success at Field of Aviation Manufacturing, but generally speaking degradable composite material in China also in conceptual phase, also unexecuted industrialization completely.Wang Xifan of University Of Suzhou et al. adopts original bamboo fabric and PLA thin film heat pressing process to be fabricated to composite, with NaOH solution and silane coupler, bamboo fiber is carried out surface modification treatment, improve the interface performance of composite, the comprehensive mechanics high comprehensive performance of composite. The external research and development about natural fiber degradable composite material and goods thereof is carried out relatively early, comes into the industrialization stage, and application is more and more wider. BASF AG adopts the fibers such as Folium Agaves Sisalanae, Corchorus olitorius L., Caulis et Folium Lini to be reinforcing material, with thermoplastic resin for matrix, prepares natural fiber felt composite material, is applied to the inside gadget of car, inhales noise plate, standby wheel cover etc. United States Patent (USP) " roof of the vehicle " (patent No. 5942321 date of publication on August 24th, 1999) adopts Corchorus olitorius L., sisal fiber to replace traditional glass fibre to produce the little soft surface of noise of good performance and heat-insulating roof of the vehicle. DieuTV et al. (StudyonpreparationofpolymercompositesbasedonPPreinforced byjutefibers) find Corchorus olitorius L. through room temperature 20 DEG C, mass fraction 0.4% alkaline solution treatment after, interfacial adhesion between fiber and resin improves, and the mechanical property of composite improves.
Ramee is subject to increasing attention as environment-friendly materials, apply also more and more extensive, but ramee degree of crystallinity and the degree of orientation are high, hygroscopicity is good, mechanical property is general, fiber appearance is straight, thick and stiff, low without curling, elongation at break and intensity, therefore ramee is as composite material reinforcement body, to be modified before application processing, carry out degumming and nonpolar process, make it possess good hydrophobic performance and mechanical property, improve the compatibility of fiber and resin matrix, make fiber play the effect of effective reinforced composite performance.
Summary of the invention
It is an object of the invention to provide a kind of method of modifying making composite material reinforcement body ramee hydrophobicity improve, to improve the compatibility between fiber and resin matrix, improve the mechanical property of composite.
In order to realize object above, present invention employs following technical proposal: as the method for modifying of the ramee of environment friendly composite material reinforcement, include following steps:
(1) ramee is cut to 300 × 300mm size, with concentrated base, ramee being carried out dipping pretreatment, soak time is 30min-150min, regulates pH to neutrality with distilled water wash, naturally dry under room temperature, obtain the ramee of preliminary treatment;
(2) nano silicon is placed in the ethanol water of Silane coupling reagent KH-570, magnetic agitation 20-30min, the ramee of preliminary treatment is immersed in above-mentioned solution, soak time is 45min-90min, take out after naturally drying under room temperature, dry further in an oven again, obtain the ramee of modification.
By such scheme, step (1) described ramee is the pure Boehmeria plain of 21S*21S/52*58/63 ＂.
By such scheme, the described concentrated alkali solution of step (1) adopts concentration to be the NaOH solution of 0.75-2.25mol/L.
By such scheme, step (1) the described dipping by lye time is 30-150min.
By such scheme, the described hydrochloric acid solution that solution is 0.5mol/L～2mol/L being used for regulating pH of step (1).
By such scheme, the 1%-7% that consumption is ramee quality of step (2) described silane coupler, the consumption of nano silicon is the 1%-10% of ramee quality.
By such scheme, step (2) described ethanol water is volume ratio is the mixed solution of ethanol and water of 3:1.
By such scheme, the described magnetic agitation speed of step (2) is 500rpm.
By such scheme, the drying temperature in step (2) described baking oven is 60 DEG C-80 DEG C, and the time is 2h-4h.
The reinforcement that the present invention is composite with modified ramee, prepares resin, adopts priming by vacuum (VARI) moulding process to prepare ramee and strengthens polymer matrix composites sheet material; Described resin formula mass ratio is: vinylite: firming agent: accelerator=100:0.35:0.03, and firming agent is methyl ethyl ketone peroxide, and accelerator is cobalt iso-octoate, and hardening time is 1h; The laying of described composite board is 10 layers, and board dimension is 300 × 300mm; The technological parameter of described VARI moulding process is: vacuum pressure-0.08Mpa.
The main component of the ramee of the present invention is cellulose, hemicellulose, pectin and lignin, and lignin has certain lipophile, and cellulose, owing to itself is with many hydroxyls, has strong hydrophilic. Nano silicon has hydrophilic due to small-size effect. Ramee removes one layer of colloid on surface after concentrated base processes, and presents loose structure, is conducive to the immersion of nanoparticle. Fiber surface roughening increases, and the compatibility between resin matrix improves, again through silane coupler, swelling ramee and nano silicon are processed, nano silicon is filled by physics and is connected on ramee in the way of chemical bonding, the hydrophobicity making ramee improves, improve the resin wellability to fiber, make composite materials property improve. The reinforcement that the present invention is composite with ramee, makes full use of the resourceful advantage of China's ramee, and economic and environment-friendly. Adopt the complex method of VARI molding, at room temperature solidify, easy and simple to handle, with low cost. After measured, utilize the composite that the method for the present invention prepares to have interface performance and the mechanical property of excellence, there is the using value of reality.
Present invention have the advantage that
(1) present invention is with natural fiber for raw material, and wide material sources are with low cost, environmental protection.
(2) preparation technology of the present invention is simple, at room temperature operates, reaction temperature and, it is simple to operation.
(3) method of modifying of the present invention improves the wellability between ramee and resin matrix, improves the interface compatibility of composite, improves the mechanical property of composite.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described in detail, but this explanation will not be construed as limiting the invention.
Comparative example 1:
(1) ramee is cut to 300 × 300mm size, by the NaOH solution of 1.25mol/L, ramee is carried out dipping pretreatment, soak time is 60min, regulates pH with the hydrochloric acid solution of 1mol/L and uses distilled water wash to neutrality, naturally dries under room temperature;
(2) by relative to ramee quality 5% Silane coupling reagent KH-570 be dissolved in the ethanol water of volume ratio 3:1, with vinegar acid for adjusting pH to 3-4, magnetic agitation 20-30min, ramee through dipping by lye is immersed in the ethanol water of coupling agent, soak time is 45min, washing, to neutrality, is dried naturally. Being positioned in baking oven and dry further, arranging temperature is 80 DEG C, and drying time is 2h, obtains the ramee modifiied;
(3) reinforcement being composite with the ramee processed, prepares resin, according to vinylite: firming agent: accelerator mass ratio is that 100:0.35:0.03 prepares resin, and hardening time is about 1h. Adopting priming by vacuum (VARI) moulding process to prepare ramee and strengthen polymer matrix composites, board dimension is 300 × 300mm, and thickness is 3-4mm.
Obtained composite is stretched and bending strength test, and hot strength is 87.3MPa; Bending strength is 111.7MPa; Experimental technique respectively refers to GB/T1447-2005 fibre reinforced plastics stretching test method and GB/T1449-2005 fibre reinforced plastics bend test method, and equipment is Rui Geer RGM-4030 microcomputer controlled electronic universal tester. Tensile sample specification is 250mm × 25mm, clamp distance is 100mm; Bend specimen specification is 80mm × 15mm, span is 60mm, stretches the loading velocity with bend test and is 2mm/min.
Comparative example 2:
(1) ramee is cut to 300 × 300mm size, by the NaOH solution of 0.75mol/L, ramee is carried out dipping pretreatment, soak time is 60min, regulates pH with the hydrochloric acid solution of 1mol/L and uses distilled water wash to neutrality, naturally dries under room temperature;
(2) by relative to ramee quality 5% Silane coupling reagent KH-570 be dissolved in the ethanol water of volume ratio 3:1, with vinegar acid for adjusting pH to 3-4, magnetic agitation 20-30min, ramee through dipping by lye is immersed in the ethanol water of coupling agent, soak time is 45min, washing, to neutrality, is dried naturally. Being positioned in baking oven and dry further, arranging temperature is 80 DEG C, and drying time is 2h, obtains the ramee modifiied;
(3) reinforcement being composite with the ramee processed, prepares resin, according to vinylite: firming agent: accelerator mass ratio is that 100:0.35:0.03 prepares resin, and hardening time is about 1h. Adopting priming by vacuum (VARI) moulding process to prepare ramee and strengthen polymer matrix composites, board dimension is 300 × 300mm, and thickness is 3-4mm.
Obtained composite is stretched and bending strength test, and hot strength is 101MPa; Bending strength is 130.2MPa; Test method is with example 1.
Comparative example 3:
(1) ramee is cut to 300 × 300mm size, by the NaOH solution of 0.75mol/L, ramee is carried out dipping pretreatment, soak time is 60min, regulates pH with the hydrochloric acid solution of 1mol/L and uses distilled water wash to neutrality, naturally dries under room temperature;
(2) by relative to ramee quality 3% Silane coupling reagent KH-570 be dissolved in the ethanol water of volume ratio 3:1, with vinegar acid for adjusting pH to 3-4, magnetic agitation 20-30min, ramee through dipping by lye is immersed in the ethanol water of coupling agent, soak time is 45min, washing, to neutrality, is dried naturally. Being positioned in baking oven and dry further, arranging temperature is 80 DEG C, and drying time is 2h, obtains the ramee modifiied;
(3) reinforcement being composite with the ramee processed, prepares resin, according to vinylite: firming agent: accelerator mass ratio is that 100:0.35:0.03 prepares resin, and hardening time is about 1h. Adopting priming by vacuum (VARI) moulding process to prepare ramee and strengthen polymer matrix composites, board dimension is 300 × 300mm, and thickness is 3-4mm.
Obtained composite is stretched and bending strength test, and hot strength is 94MPa; Bending strength is 128.1MPa; Test method is with example 1.
Embodiment 4:
(1) ramee is cut to 300 × 300mm size, by the NaOH solution of 0.75mol/L, ramee is carried out dipping pretreatment, soak time is 60min, regulates pH with the hydrochloric acid solution of 1mol/L and uses distilled water wash to neutrality, naturally dries under room temperature.
(2) by the ethanol water (volume ratio ethanol: water=3:1) of the Silane coupling reagent KH-570 being placed in 5% relative to the nano silicon of ramee quality 1%, with vinegar acid for adjusting pH to 3-4, magnetic agitation 20-30min, ramee through dipping by lye is immersed in the ethanol water of coupling agent, soak time is 45min, washing, to neutrality, is dried naturally. Being positioned in baking oven and dry further, arranging temperature is 80 DEG C, and drying time is 2h, obtains the ramee of Combined Treatment.
(3) reinforcement being composite with the ramee processed, prepares resin, according to vinylite: firming agent: accelerator mass ratio is that 100:0.35:0.03 prepares resin, and hardening time is about 1h. Adopting priming by vacuum (VARI) moulding process to prepare ramee and strengthen polymer matrix composites, board dimension is 300 × 300mm, and thickness is 3-4mm.
Obtained composite is stretched and bending strength test, and hot strength is 110.6MPa; Bending strength is 135.3MPa; Test method is with example 1.
Embodiment 5:
(1) ramee is cut to 300 × 300mm size, by the NaOH solution of 0.75mol/L, ramee is carried out dipping pretreatment, soak time is 60min, regulates pH with the hydrochloric acid solution of 1mol/L and uses distilled water wash to neutrality, naturally dries under room temperature.
(2) by the ethanol water (volume ratio ethanol: water=3:1) of the Silane coupling reagent KH-570 being placed in 5% relative to the nano silicon of ramee quality 2%, with vinegar acid for adjusting pH to 3-4, magnetic agitation 20-30min, ramee through dipping by lye is immersed in the ethanol water of coupling agent, soak time is 45min, washing, to neutrality, is dried naturally. Being positioned in baking oven and dry further, arranging temperature is 80 DEG C, and drying time is 2h, obtains the ramee of Combined Treatment.
(3) reinforcement being composite with the ramee processed, prepares resin, according to vinylite: firming agent: accelerator mass ratio is that 100:0.35:0.03 prepares resin, and hardening time is about 1h. Adopting priming by vacuum (VARI) moulding process to prepare ramee and strengthen polymer matrix composites, board dimension is 300 × 300mm, and thickness is 3-4mm.
Obtained composite is stretched and bending strength test, and hot strength is 123MPa; Bending strength is 140.8MPa; Test method is with example 1.
The foregoing is only the preferred embodiment of the present invention, be not limited to the present invention, for art technology, the present invention can have multiple change. In the technology of every present invention and principle, any amendment of making, equal replacement, improvement etc., should be included within protection scope of the present invention.
Claims (9)
1. it is used as the method for modifying of the ramee of environment friendly composite material reinforcement, includes following steps:
(1) ramee is cut to 300 × 300mm size, with concentrated base, ramee being carried out dipping pretreatment, soak time is 30min-150min, regulates pH to neutrality with distilled water wash, naturally dry under room temperature, obtain the ramee of preliminary treatment;
(2) nano silicon is placed in the ethanol water of Silane coupling reagent KH-570, magnetic agitation 20-30min, the ramee of preliminary treatment is immersed in above-mentioned solution, soak time is 45min-90min, take out after naturally drying under room temperature, dry further in an oven again, obtain the ramee of modification.
2. it is used as the method for modifying of the ramee of environment friendly composite material reinforcement according to claim 1, it is characterised in that step (1) described ramee is the pure Boehmeria plain of 21S*21S/52*58/63 ＂.
3. it is used as the method for modifying of the ramee of environment friendly composite material reinforcement according to claim 1, it is characterised in that the described concentrated alkali solution of step (1) adopts concentration to be the NaOH solution of 0.75-2.25mol/L.
4. it is used as the method for modifying of the ramee of environment friendly composite material reinforcement according to claim 1, it is characterised in that step (1) the described dipping by lye time is 30-150min.
5. it is used as the method for modifying of the ramee of environment friendly composite material reinforcement according to claim 1, it is characterised in that the described hydrochloric acid solution that solution is 0.5mol/L～2mol/L being used for regulating pH of step (1).
6. it is used as the method for modifying of the ramee of environment friendly composite material reinforcement according to claim 1, it is characterized in that, the 1%-7% that consumption is ramee quality of step (2) described silane coupler, the consumption of nano silicon is the 1%-10% of ramee quality.
7. it is used as the method for modifying of ramee of environment friendly composite material reinforcement according to claim 1, it is characterised in that step (2) described ethanol water is volume ratio is the ethanol mixed solution with water of 3:1.
8. it is used as the method for modifying of the ramee of environment friendly composite material reinforcement according to claim 1, it is characterised in that the described magnetic agitation speed of step (2) is 500rpm.
9. it is used as the method for modifying of the ramee of environment friendly composite material reinforcement according to claim 1, it is characterised in that the drying temperature in step (2) described baking oven is 60 DEG C-80 DEG C, and the time is 2h-4h.
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