CN118005332A - Novel fiber cover plate and preparation method - Google Patents
Novel fiber cover plate and preparation method Download PDFInfo
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- CN118005332A CN118005332A CN202410423933.5A CN202410423933A CN118005332A CN 118005332 A CN118005332 A CN 118005332A CN 202410423933 A CN202410423933 A CN 202410423933A CN 118005332 A CN118005332 A CN 118005332A
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- fiber cover
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- 239000000835 fiber Substances 0.000 title claims abstract description 86
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000004743 Polypropylene Substances 0.000 claims abstract description 43
- -1 polypropylene Polymers 0.000 claims abstract description 43
- 229920001155 polypropylene Polymers 0.000 claims abstract description 43
- RGHHSNMVTDWUBI-UHFFFAOYSA-N 4-hydroxybenzaldehyde Chemical compound OC1=CC=C(C=O)C=C1 RGHHSNMVTDWUBI-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000004568 cement Substances 0.000 claims abstract description 28
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 22
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 18
- IRQWEODKXLDORP-UHFFFAOYSA-N 4-ethenylbenzoic acid Chemical compound OC(=O)C1=CC=C(C=C)C=C1 IRQWEODKXLDORP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 13
- PUVAFTRIIUSGLK-UHFFFAOYSA-M trimethyl(oxiran-2-ylmethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CC1CO1 PUVAFTRIIUSGLK-UHFFFAOYSA-M 0.000 claims abstract description 12
- 229920001661 Chitosan Polymers 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 47
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 21
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 14
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 14
- 238000010992 reflux Methods 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000011083 cement mortar Substances 0.000 claims description 8
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 7
- 229960000583 acetic acid Drugs 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 7
- 239000012362 glacial acetic acid Substances 0.000 claims description 7
- 239000003456 ion exchange resin Substances 0.000 claims description 7
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 7
- 238000004090 dissolution Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- DCNHVBSAFCNMBK-UHFFFAOYSA-N naphthalene-1-sulfonic acid;hydrate Chemical compound O.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 DCNHVBSAFCNMBK-UHFFFAOYSA-N 0.000 claims description 2
- 229920005646 polycarboxylate Polymers 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 4
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 7
- 239000004566 building material Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 24
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000009863 impact test Methods 0.000 description 7
- 238000010998 test method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0625—Polyalkenes, e.g. polyethylene
- C04B16/0633—Polypropylene
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention relates to the technical field of building materials, and discloses a novel fiber cover plate and a preparation method thereof, wherein the material comprises the following components: 1000-1500 parts of cement, 200-300 parts of silicon powder, 600-1000 parts of machine-made sand, 20-40 parts of modified polypropylene fiber, 15-30 parts of water reducer, 300-500 parts of water, basalt fiber net and basalt fiber rib. The modified polypropylene fiber is prepared by melting and modifying polypropylene by using products prepared from p-hydroxybenzaldehyde, 2, 3-epoxypropyl trimethyl ammonium chloride, chitosan and 4-vinyl benzoic acid, so that the modified polypropylene fiber is obtained, stronger mechanical properties are provided, the bearing capacity of a fiber cover plate is enhanced, and meanwhile, some active groups on the modified polypropylene fiber have certain antibacterial and corrosion resistance properties and certain adaptability to various complex environments. The invention has strong bearing capacity and impact resistance, can adapt to working environment with higher strength, has stronger antibacterial capacity and prolongs the service life under complex working environment.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a novel fiber cover plate and a preparation method thereof.
Background
Cement fiber cover plates are a common type of building material, covers with trenches, protection of equipment, and the like. The cement fiber cover plate is prepared by adding aggregate into cement, is a cement prefabricated member, and can be made into the shapes of columns, pipes and the like, thereby meeting the requirements of different functions. Many fiber cover plates are arranged on the market, the products are different, the application environments are different, but the bearing capacity of some products is limited, so that accidents occur in the use process, and therefore, the fiber cover plate with high bearing capacity, high impact resistance and corrosion resistance is designed, and the application prospect is very wide.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a novel fiber cover plate and a preparation method thereof.
(II) technical scheme
The novel material for the fiber cover plate material comprises the following components:
1000-1500 parts of cement, 200-300 parts of silicon powder, 600-1000 parts of machine-made sand, 20-40 parts of modified polypropylene fiber, 15-30 parts of water reducer, 300-500 parts of water, basalt fiber net and basalt fiber rib; the water-cement ratio of the fiber cover plate material is 0.2-0.3; the fiber cover plate material comprises the following components in parts by weight.
Preferably, the single cover plate material of the fiber cover plate comprises the following components in percentage by weight:
Cement 9.02 kg, silica powder 2.05 kg, machine-made sand 6.56 kg, modified polypropylene fiber 0.246 kg, water reducer 0.205 kg, water 2.701 kg, basalt fiber net 1 sheet, basalt fiber reinforcing steel (2.25 m) 3.
Preferably, the preparation method of the modified polypropylene fiber comprises the following steps:
(1) Adding p-hydroxybenzaldehyde into ethanol, stirring and dissolving for later use; adding 2, 3-epoxypropyl trimethyl ammonium chloride into isopropanol solution, stirring and dissolving, adding into p-hydroxybenzaldehyde solution, continuously stirring at 60-80 ℃, reacting for 2-8 hours, decompressing and evaporating the solution to remove the solvent, and washing with water to be neutral to obtain an intermediate 1;
(2) Adding chitosan into glacial acetic acid solution with mass fraction of 8-16%, stirring for dissolution, adding intermediate 1, heating in water bath to reflux, stirring for reaction for 5-20 h, and reflux-extracting with ethanol by a Soxhlet extractor for 10-30 h to obtain intermediate 2;
(3) Adding 4-vinylbenzoic acid into an ethanol solution, continuously stirring until the 4-vinylbenzoic acid is dissolved, adding an intermediate 2 and a catalyst strong acid ion exchange resin, heating to reflux, continuously stirring for reacting for 8-20 hours, and evaporating a solvent under reduced pressure to obtain an intermediate 3;
(4) And (3) crushing the polypropylene, the intermediate 3 and the dicumyl peroxide by a crusher, uniformly mixing, and then passing through a single screw extruder, wherein the temperature of the first area is 160-180 ℃, the temperature of the second area is 190-200 ℃, the screw rotating speed is 60-80 r/min, and obtaining the modified polypropylene fiber after water cooling, traction, granulating and drying of the extruded body.
Preferably, in the step (1), the mass ratio of the p-hydroxybenzaldehyde to the 2, 3-epoxypropyl trimethyl ammonium chloride is 1:0.3-0.6.
Preferably, in the step (2), the mass ratio of the intermediate 1 to the chitosan is 1:0.4-0.8.
Preferably, in the step (3), the mass ratio of the intermediate 2 to the 4-vinyl benzoic acid is 1:0.3-0.8.
Preferably, in the step (4), the mass ratio of the polypropylene to the intermediate 3 to the dicumyl peroxide is 1:0.3-0.6:0.01-0.03.
Preferably, the water reducer is one of a polycarboxylate water reducer, a naphthalene sulfonate water reducer and an HSB aliphatic water reducer.
Preferably, the preparation method of the fiber cover plate comprises the following steps: weighing according to parts by weight, mixing cement, silica powder and machine-made sand, adding water after uniformly stirring, continuously stirring, adding modified polypropylene fiber and a water reducing agent, and uniformly stirring to prepare cement mortar; binding basalt fiber ribs together on the same plane, paving basalt fiber nets, putting into a mold, pouring cement mortar into the mold, vibrating uniformly, standing and solidifying to obtain the fiber cover plate.
(III) beneficial technical effects
The novel material for the fiber cover plate material comprises the following components: 1000-1500 parts of cement, 200-300 parts of silicon powder, 600-1000 parts of machine-made sand, 20-40 parts of modified polypropylene fiber, 15-30 parts of water reducer, 300-500 parts of water, basalt fiber net and basalt fiber rib.
The modified polypropylene fiber is prepared by performing ring opening reaction on p-hydroxybenzaldehyde and 2, 3-epoxypropyl trimethyl ammonium chloride, then performing elimination reaction on the p-hydroxybenzaldehyde and the 2, 3-epoxypropyl trimethyl ammonium chloride, and esterifying the p-hydroxybenzaldehyde and the 4-vinylbenzoic acid, and melting and modifying the polypropylene to obtain the modified polypropylene fiber. The modified polypropylene fiber can provide stronger mechanical property, enhance the bearing capacity of the fiber cover plate, and simultaneously have certain antibacterial and corrosion-resistant properties for some active groups on the fiber cover plate and certain adaptability to various complex environments.
The invention has strong bearing capacity and impact resistance, can adapt to working environment with higher strength, has stronger antibacterial capacity and prolongs the service life under complex working environment. The preparation process is simple, and the market application value is high.
Drawings
Fig. 1 is a fiber cover sheet view.
Fig. 2 is a schematic plan view of a fiber cover plate. The appearance is cuboid, the appearance is grey brown, and grooves with the length of 30 cm and the width of about 1 cm are formed in two sides of the middle.
Fig. 3 is a diagram of a cover plate design load test.
Fig. 4 is a graph of a microcomputer controlled tooth shear tester breaking load test.
FIG. 5 is a load-displacement plot of a deformation 2mm load test.
FIG. 6 is a load-displacement plot of a 20mm deformation load test.
Fig. 7 is a load-displacement diagram of a limit load test.
Fig. 8 is a steel ball impact test chart.
Fig. 9 is a graph of the test procedure for continuously piling up 140Kg weights after the steel ball impact test 8 times (without breaking).
Fig. 10 is a graph of the course of the adult test after 8 ball impact tests (unbroken) with a 140Kg weight and 140Kg continued to be piled.
Detailed Description
Example 1
The preparation method of the modified polypropylene fiber comprises the following steps:
(1) Adding 10 kg p-hydroxybenzaldehyde into 50L ethanol, stirring and dissolving for later use; 3 kg of 2, 3-epoxypropyl trimethyl ammonium chloride is added into 10L isopropanol solution, stirred and dissolved, added into p-hydroxybenzaldehyde solution, continuously stirred at 60 ℃, reacted 2 h, the solution is decompressed and distilled to remove solvent, and water is washed to be neutral, thus obtaining an intermediate 1.
(2) Adding 5 kg chitosan into 50L mass percent of glacial acetic acid solution with the mass percent of 8%, stirring for dissolution, adding the intermediate 1, heating in a water bath to reflux, stirring for reaction 5 h, and reflux-extracting 10h by using ethanol through a Soxhlet extractor to obtain the intermediate 2.
(3) Adding 5 kg of 4-vinylbenzoic acid into 20L ethanol solution, continuously stirring until the solution is dissolved, adding the intermediate 2 and the catalyst strong acid ion exchange resin, heating to reflux, continuously stirring for reaction 8h, and evaporating the solvent under reduced pressure to obtain the intermediate 3.
(4) Crushing 50 kg polypropylene, an intermediate 3 and 0.5 kg dicumyl peroxide by a crusher, uniformly mixing, passing through a single screw extruder, carrying out water cooling, traction, granulating and drying on the extrudate at the temperature of 160 ℃ in a first area and 190 ℃ in a second area, and the screw speed of 60 r/min to obtain the modified polypropylene fiber.
Example 2
The preparation method of the modified polypropylene fiber comprises the following steps:
(1) Adding 50 kg p-hydroxybenzaldehyde into 200L ethanol, stirring and dissolving for later use; 30 kg of 2, 3-epoxypropyl trimethyl ammonium chloride is added into 100L isopropanol solution, stirred and dissolved, added into p-hydroxybenzaldehyde solution, continuously stirred at 80 ℃, reacted for 8h, the solution is decompressed and distilled to remove solvent, and water is washed to be neutral, thus obtaining an intermediate 1.
(2) Adding 30 kg chitosan into 180: 180L mass fraction 16% glacial acetic acid solution, stirring for dissolving, adding intermediate 1, heating in water bath to reflux, stirring for reacting 20: 20 h, reflux extracting 30: 30 h with ethanol by using a Soxhlet extractor, and obtaining intermediate 2.
(3) Adding 20 kg of 4-vinylbenzoic acid into 100L ethanol solution, continuously stirring until the solution is dissolved, adding the intermediate 2 and the catalyst strong acid ion exchange resin, heating to reflux, continuously stirring for reacting 20 h, and evaporating the solvent under reduced pressure to obtain the intermediate 3.
(4) Crushing 120 kg polypropylene, an intermediate 3 and 1.5 kg dicumyl peroxide by a crusher, uniformly mixing, passing through a single screw extruder, carrying out water cooling, traction, granulating and drying on the extruded body at the temperature of 180 ℃ in a first area and 200 ℃ in a second area, and the screw speed of 60-80 r/min to obtain the modified polypropylene fiber.
Example 3
The preparation method of the modified polypropylene fiber comprises the following steps:
(1) Adding 10 kg p-hydroxybenzaldehyde into 80L ethanol, stirring and dissolving for later use; 10 kg of 2, 3-epoxypropyl trimethyl ammonium chloride is added into 30L isopropanol solution, stirred and dissolved, added into p-hydroxybenzaldehyde solution, continuously stirred at 65 ℃, reacted for 4h, the solution is decompressed, distilled to remove solvent, and washed with water to be neutral, thus obtaining an intermediate 1.
(2) Adding 10 kg chitosan into 60L mass percent 10% glacial acetic acid solution, stirring for dissolution, adding the intermediate 1, heating in water bath to reflux, stirring for reaction 10 h, and reflux-extracting 15 h with ethanol by a Soxhlet extractor to obtain the intermediate 2.
(3) 8 Kg of 4-vinylbenzoic acid is added into 40L ethanol solution, stirred continuously until the solution is dissolved, intermediate 2 and catalyst strong acid ion exchange resin are added, heated to reflux, stirred continuously for reaction 10h, and the solvent is distilled off under reduced pressure to obtain intermediate 3.
(4) Crushing 60kg polypropylene, an intermediate 3 and 0.8 kg dicumyl peroxide by a crusher, uniformly mixing, passing through a single screw extruder, carrying out water cooling, traction, granulating and drying on the extrudate at the temperature of 165 ℃ in a first area and 190 ℃ in a second area, and the screw speed of 66 r/min to obtain the modified polypropylene fiber.
Example 4
The preparation method of the modified polypropylene fiber comprises the following steps:
(1) Adding 30 kg p-hydroxybenzaldehyde into 100L ethanol, stirring and dissolving for later use; 20 kg of 2, 3-epoxypropyl trimethyl ammonium chloride is added into 40L isopropanol solution, stirred and dissolved, added into p-hydroxybenzaldehyde solution, continuously stirred at 70 ℃, reacted for 5h, the solution is decompressed, distilled to remove solvent, and washed with water to be neutral, thus obtaining the intermediate 1.
(2) Adding 20 kg chitosan into 100L mass percent 12% glacial acetic acid solution, stirring for dissolution, adding the intermediate 1, heating in water bath to reflux, stirring for reaction 12 h, and reflux-extracting 20 h with ethanol by a Soxhlet extractor to obtain the intermediate 2.
(3) Adding 5-20 kg of 4-vinylbenzoic acid into 20-100L ethanol solution, continuously stirring until the solution is dissolved, adding the intermediate 2 and the catalyst strong acid ion exchange resin, heating until the solution is refluxed, continuously stirring and reacting for 8-20 h, and evaporating the solvent under reduced pressure to obtain the intermediate 3.
(4) Crushing 80 kg polypropylene, an intermediate 3 and 1 kg dicumyl peroxide by a crusher, uniformly mixing, passing through a single screw extruder, carrying out water cooling, traction, granulating and drying on the extrudate at the temperature of 170 ℃ in a first region and 195 ℃ in a second region and the screw speed of 75 r/min to obtain the modified polypropylene fiber.
Example 5
The preparation method of the modified polypropylene fiber comprises the following steps:
(1) Adding 40 kg p-hydroxybenzaldehyde into 150L ethanol, stirring and dissolving for later use; 25 kg of 2, 3-epoxypropyl trimethyl ammonium chloride is added into 80L isopropanol solution, stirred and dissolved, added into p-hydroxybenzaldehyde solution, continuously stirred at 75 ℃, reacted for 6h, the solution is decompressed, distilled to remove solvent, and washed with water to be neutral, thus obtaining the intermediate 1.
(2) Adding 25 kg chitosan into 150-L mass percent 15% glacial acetic acid solution, stirring for dissolution, adding the intermediate 1, heating in water bath to reflux, stirring for reaction 16-h, and reflux-extracting 25-h with ethanol by a Soxhlet extractor to obtain the intermediate 2.
(3) 18 Kg of 4-vinylbenzoic acid is added into 90L ethanol solution, stirred continuously until the solution is dissolved, intermediate 2 and catalyst strong acid ion exchange resin are added, heated to reflux, stirred continuously for reaction 18 h, and the solvent is distilled off under reduced pressure to obtain intermediate 3.
(4) 100 Kg polypropylene, an intermediate 3 and 1.2 kg dicumyl peroxide are crushed by a crusher, uniformly mixed and then pass through a single screw extruder, the temperature of the first area is 180 ℃, the temperature of the second area is 190 ℃, the screw rotation speed is 70 r/min, and the extruded body is subjected to water cooling, traction, granulating and drying to obtain the modified polypropylene fiber.
Example 6
The preparation method of the fiber cover plate comprises the following steps:
Mixing 9.02 kg cement, 2.05 kg silica powder and 6.56 kg machine-made sand, uniformly stirring, adding 2.701 kg water, continuously stirring, adding 0.246 kg modified polypropylene fiber and 0.205 kg water reducer, uniformly stirring, and preparing cement mortar; 3 basalt fiber ribs of 2.25 m are bundled together on the same plane, 1 basalt fiber net is paved, the basalt fiber net is put into a mould, cement mortar is poured into the mould, vibration is uniform, standing and solidification are carried out, and a fiber cover plate is obtained, as shown in figure 1.
Comparative example 1
Mixing 9.02 kg cement, 2.05 kg silica powder and 6.56 kg machine-made sand, uniformly stirring, adding 2.701 kg water, continuously stirring, adding 0.246 kg polypropylene fiber and 0.205 kg water reducer, uniformly stirring, and preparing cement mortar; 3 basalt fiber ribs of 2.25 m are bundled together on the same plane, 1 basalt fiber net is paved, the basalt fiber net is put into a mould, cement mortar is poured into the mould, and the fiber cover plate is obtained after uniform oscillation, standing and solidification.
Performance test:
1. weight and size measurement of fiber cover plate (as shown in FIG. 2)
Table 1 statistics for measuring appearance and size of fiber cover plate
2. Load bearing test
(1) Design load test
The test and detection method of the bearing capacity test is that the cement fiber cover plate is placed on a horizontal plane, the two sides of the cement fiber cover plate are simply supported, the net span is 65 cm, the cement fiber cover plate is overhead by more than 5 cm, weights are loaded in stages at the center of the cement fiber cover plate, and the vertical deformation condition of the centers of the two sides of the cement fiber cover plate is observed. And a mode of uniformly distributing loads by weight simulation is adopted, the designed load is loaded by 3.5 KN/m 2 by 0.78 by 0.49=1338N, the weight is controlled to be 140 Kg, and the vertical deformation is controlled to be not more than 2 mm. The detection results are as follows:
table 2 fiber cover design bearing test results (steam curing 4 d)
Conclusion of the test: and (5) qualified. The test procedure is shown in figure 3.
(2) Breaking load test
The load at failure should be no less than 2 times the design load (i.e., 280 Kg by weight) and the vertical deformation should be no less than 20 mm.
The method comprises the steps of placing the cement fiber cover plate horizontally, supporting with simple supports at two sides, enabling the net span to be 65 cm, enabling the cement fiber cover plate to be overhead to be 5 to cm or higher, and carrying out uniform-speed loading test on the center of the cement fiber cover plate by using a microcomputer-controlled pressure shear tester, wherein the loading rate is 10 mm/min. And (3) detecting: in the uniform loading process of the microcomputer control pressure shear testing machine, the load is 1.06 kN when the cement fiber cover plate deforms 2mm, the load is 2.91 kN when the cement fiber cover plate deforms 20 mm, and the limit load is 5.36 kN when the limit deformation 45 mm. (none of the above data contains the mass of the pad and support anchor, 48 Kg total mass of pad and support anchor during the test). (remark: test sample steam curing 4 d.)
Conclusion of the test: and (5) qualified. The test procedure is shown in fig. 4, and the test results are shown in fig. 5, 6 and 7.
(3) Steel ball impact test
The steel ball impact test detection method is that the cement fiber cover plate is placed horizontally, two sides are simply supported, the net span is 65 cm, and the cement fiber cover plate is impacted for 8 times according to the free falling of a 5 Kg steel ball from the 1.5 m height without breaking control. And (3) detecting: the steel ball is not broken after 8 times of impact, but the impact point is slightly dented, and no transverse through crack exists. The steel ball can still bear 140 Kg stacking load without breaking after 8 times of impact tests, and the weight of the adult is increased by about 70 Kg respectively without breaking.
Table 3 steel ball impact test results (steam curing 4 d)
Conclusion of the test: and (5) qualified. The test procedure is shown in figures 8, 9 and 10.
3. Antibacterial, limit fracture test
Performance tests were performed between fibrous cover sheets prepared using the modified polypropylene fibers prepared in examples 1-5 and comparative example 1.
Antibacterial test: the fibrous cover sheets of examples 1-5 and comparative example 1 were placed in a dark and moist place and after two weeks were observed for mold formation.
Limit fracture test: the longitudinal force was applied to the fibrous cover sheets of examples 1-5 and comparative example 1 and the pressure at which the first crack was generated was measured.
Table 4 test results
Conclusion of the test: the antibacterial properties of examples 1-5 were more excellent and the modified polypropylene fibers provided a stronger load-bearing capacity.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A novel fiber cover plate, characterized in that: the material of the fiber cover plate material comprises the following components:
1000-1500 parts of cement, 200-300 parts of silicon powder, 600-1000 parts of machine-made sand, 20-40 parts of modified polypropylene fiber, 15-30 parts of water reducer, 300-500 parts of water, basalt fiber net and basalt fiber rib; the water-cement ratio of the fiber cover plate material is 0.2-0.3; the fiber cover plate material comprises the following components in parts by weight.
2. A novel fiber cover plate according to claim 1, wherein: the single cover plate material of the fiber cover plate comprises the following components in percentage by weight:
Cement 9.02 kg, silica powder 2.05 kg, machine-made sand 6.56 kg, modified polypropylene fiber 0.246 kg, water reducer 0.205 kg, water 2.701 kg, basalt fiber net 1 sheet, basalt fiber reinforcing steel (2.25 m) 3.
3. The method for preparing the novel fiber cover plate according to claim 1, wherein the method comprises the following steps: the preparation method of the modified polypropylene fiber comprises the following steps:
(1) Adding p-hydroxybenzaldehyde into ethanol, stirring and dissolving for later use; adding 2, 3-epoxypropyl trimethyl ammonium chloride into isopropanol solution, stirring and dissolving, adding into p-hydroxybenzaldehyde solution, continuously stirring at 60-80 ℃, reacting for 2-8 hours, decompressing and evaporating the solution to remove the solvent, and washing with water to be neutral to obtain an intermediate 1;
(2) Adding chitosan into glacial acetic acid solution with mass fraction of 8-16%, stirring for dissolution, adding intermediate 1, heating in water bath to reflux, stirring for reaction for 5-20 h, and reflux-extracting with ethanol by a Soxhlet extractor for 10-30 h to obtain intermediate 2;
(3) Adding 4-vinylbenzoic acid into an ethanol solution, continuously stirring until the 4-vinylbenzoic acid is dissolved, adding an intermediate 2 and a catalyst strong acid ion exchange resin, heating to reflux, continuously stirring for reacting for 8-20 hours, and evaporating a solvent under reduced pressure to obtain an intermediate 3;
(4) And (3) crushing the polypropylene, the intermediate 3 and the dicumyl peroxide by a crusher, uniformly mixing, and then passing through a single screw extruder, wherein the temperature of the first area is 160-180 ℃, the temperature of the second area is 190-200 ℃, the screw rotating speed is 60-80 r/min, and obtaining the modified polypropylene fiber after water cooling, traction, granulating and drying of the extruded body.
4. A method of making a new fiber cover sheet in accordance with claim 3 wherein: in the step (1), the mass ratio of the p-hydroxybenzaldehyde to the 2, 3-epoxypropyl trimethyl ammonium chloride is 1:0.3-0.6.
5. A method of making a new fiber cover sheet in accordance with claim 3 wherein: and (3) in the step (2), the mass ratio of the intermediate 1 to the chitosan is 1:0.4-0.8.
6. A method of making a new fiber cover sheet in accordance with claim 3 wherein: the mass ratio of the intermediate 2 to the 4-vinyl benzoic acid in the step (3) is 1:0.3-0.8.
7. A method of making a new fiber cover sheet in accordance with claim 3 wherein: in the step (4), the mass ratio of the polypropylene to the intermediate 3 to the dicumyl peroxide is 1:0.3-0.6:0.01-0.03.
8. A novel fiber cover plate according to claim 1, wherein: the water reducer is one of a polycarboxylate water reducer, a naphthalene sulfonate water reducer and an HSB aliphatic water reducer.
9. The method for preparing the novel fiber cover plate according to claim 1, wherein the method comprises the following steps: the preparation method of the fiber cover plate comprises the following steps: weighing according to parts by weight, mixing cement, silica powder and machine-made sand, adding water after uniformly stirring, continuously stirring, adding modified polypropylene fiber and a water reducing agent, and uniformly stirring to prepare cement mortar; binding basalt fiber ribs together on the same plane, paving basalt fiber nets, putting into a mold, pouring cement mortar into the mold, vibrating uniformly, standing and solidifying to obtain the fiber cover plate.
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