CN113667311B - Polypropylene reinforced material for operation console - Google Patents
Polypropylene reinforced material for operation console Download PDFInfo
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- CN113667311B CN113667311B CN202110850191.0A CN202110850191A CN113667311B CN 113667311 B CN113667311 B CN 113667311B CN 202110850191 A CN202110850191 A CN 202110850191A CN 113667311 B CN113667311 B CN 113667311B
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L87/00—Compositions of unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
- C08L87/005—Block or graft polymers not provided for in groups C08L1/00 - C08L85/04
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
- C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
- C08G77/395—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing phosphorus
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
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- C08K2003/2241—Titanium dioxide
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Abstract
The invention relates to the technical field of preparation of operating table raw materials, and discloses a polypropylene reinforcing material for an operating table, aiming at the problem of poor compatibility among components of the existing mixture containing a polypropylene matrix material, wherein the raw materials of the polypropylene reinforcing material comprise the following components in parts by weight: 70-80 parts of high-deformation friction-resistant group grafted polypropylene; 20-25 parts of talcum powder grafted glass fiber; 5-8 parts of a toughening agent; 2-4 parts of a coloring agent; 0.5-1.5 parts of lubricant. According to the invention, wear-resistant flame-retardant high-deformation friction-resistant groups are introduced into a polypropylene molecular chain, talcum powder is grafted on glass fiber, and styrene-butadiene is added to increase the compatibility among polypropylene reinforced material components, so that the overall dispersibility and connecting force of the polypropylene reinforced material are improved, and the requirements of high flame retardance, wear resistance, impact resistance and high strength of an operating platform are met.
Description
Technical Field
The invention relates to the technical field of preparation of operating table raw materials, in particular to a polypropylene reinforced material for an operating table.
Background
The operation panel is also called a control panel, is widely used in the industries of energy, electric power, communication, traffic, government, finance, security protection, aviation and the like, and can not be separated from the operation panel as long as the display equipment is in a place with a large number of display equipment. Polypropylene (PP) meets the basic requirements of being a raw material of an operation table by virtue of its excellent physical properties and processability, such as light specific gravity, low price, good mechanical properties, good heat resistance, etc. In the existing operation table, PP is mostly used as a main raw material, but the polypropylene has poor wear resistance, poor mechanical property and large shrinkage rate and does not have flame retardant property, so that inorganic powder and other wear-resistant fillers and flame retardants and other auxiliaries are required to be added into the polypropylene when the raw materials are compounded, so that the wear resistance, the mechanical property and the flame retardance of the polypropylene material are improved, and the use requirement of the operation table is met. For example, patent No. cn201811122706.x, the patent name "a high-strength wear-resistant modified polypropylene material", includes the following raw materials in parts by weight: 200 parts of wear-resistant modified polypropylene base material, 15-26 parts of nano silicon dioxide-sisal fiber composite wear-resistant filler, 36-50 parts of ethylene propylene diene monomer dispersion liquid, 6-16 parts of multi-walled carbon nanotube-montmorillonite composite reinforced filler and 4-7 parts of PP flame-retardant master batch.
The defects of the prior art are that the components and the polypropylene base material are physically mixed, the compatibility among the components is poor, the connecting force is insufficient, and the problem of easy agglomeration is also brought, so that the mechanical property of the base material cannot be effectively improved.
Disclosure of Invention
The invention provides a polypropylene reinforced material for an operation table, aiming at overcoming the problem of poor compatibility among components of the existing mixture containing a polypropylene matrix material.
In order to achieve the purpose, the invention adopts the following technical scheme:
the polypropylene reinforced material for the operating table comprises the following raw materials in parts by weight:
the high-deformation friction-resistant group grafted polypropylene is prepared by grafting a high-deformation friction-resistant group onto polypropylene, and has the excellent performance of polypropylene, and also has strong friction resistance, deformation resistance and crack propagation capacity; according to the invention, the talcum powder is grafted to the glass fiber, so that the strong tensile resistance of the glass fiber is maintained, meanwhile, the talcum powder is loaded around the glass fiber, the impact resistance of the high-deformation friction-resistant group grafted polypropylene base material is further enhanced, the contact area between the glass fiber and the base material is increased, and both titanium dioxide and the talcum powder have the functions of rolling balls, so that the double friction resistance and toughening function are realized; in addition, styrene-butadiene is added to reduce the brittleness of the base material, and linear molecular chains of the styrene-butadiene can freely stretch and cover the peripheries of the high-deformation friction-resistant group grafted polypropylene and the talcum powder grafted glass fiber, so that the styrene-butadiene rubber can play a good role in compatibility, coating and fixing the high-deformation friction-resistant group grafted polypropylene and the talcum powder grafted glass fiber. Finally, the operation table prepared from the polypropylene reinforced material has high strength, high impact resistance, wear resistance and flame retardance.
Preferably, the preparation process of the high deformation friction-resistant group grafted polypropylene is as follows:
(1) mixing methacryloxypropyltriethoxysilane, ethanol and concentrated hydrochloric acid according to a mass ratio of 2-2.5: 3-4: 0.6-0.8, adding the mixture into water with the volume 4-5 times of that of the mixture, reacting for 18-22h at the temperature of 50-56 ℃, and filtering and cleaning the product to obtain methacryloxypropyl polysilsesquioxane;
(2) adding methacryloxypropyl polysilsesquioxane and triallyl phosphate into acetone, stirring uniformly, adding N, N-dimethylaniline, heating to 88-92 ℃, stirring for reacting for 1.8-2.2h, and removing the acetone to obtain the flame-retardant modified methacryloxypropyl polysilsesquioxane;
(3) dispersing acetic acid in an isopropanol aqueous solution with the mass concentration of 45-55%, adjusting the pH value to 5-6.5, dropwise adding n-butyl titanate, stirring and hydrolyzing for 1.5-2h after dropwise adding, adding flame-retardant modified methacryloxypropyl polysilsesquioxane, aging for 10-12h after uniformly stirring, washing, drying for 20-22h at the temperature of 100-;
(4) adding polypropylene, graft modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide and diisopropyl peroxydicarbonate into hexane, stirring for 2-2.5h, heating to 86-90 ℃ under the protection of nitrogen, reacting for 6-8h, and drying to obtain the high-deformation friction-resistant group grafted polypropylene.
The specific reaction mechanism of each step in the high-deformation friction-resistant group grafted polypropylene is as follows: in the step (1), methacryloxypropyl triethoxysilane is subjected to hydrolytic condensation reaction to prepare cage polysilsesquioxane with eight apex angles connected with methacryloxypropyl groups, the cage structure has strong elasticity and impact resistance, an inorganic core consisting of silica frameworks formed by alternately connecting inorganic cores Si-O can inhibit the chain motion of polymer molecules to endow the material with good thermal stability, mechanical property and flame retardance, the methacryloxypropyl groups contain acyloxy groups, carbon-carbon double bonds and alkyl groups, and the alkyl groups can enhance the hydrophobic property of the member; in the step (2), carbon-carbon double bonds in triallyl phosphate and carbon-carbon double bonds on methacryloxypropyl polysilsesquioxane are subjected to addition polymerization reaction, phosphate groups are introduced to form the flame-retardant modified methacryloxypropyl polysilsesquioxane with enhanced phosphorus-silicon synergistic flame-retardant effect, and a plurality of carbon-carbon double bonds capable of participating in the next reaction are also introduced; in the step (3), the hydrolysis reaction of n-butyl titanate under an acidic condition is carried out, nano titanium dioxide is loaded on polysilsesquioxane, composite particles formed by compounding titanium dioxide and flame-retardant modified methacryloxypropyl polysilsesquioxane have strong toughening and impact resisting effects, the overall wear resistance of the material is improved, and the anti-aging effect is strong; in the step (4), the polypropylene molecular chain is grafted with double bonds on triallyl phosphate to form high-deformation friction-resistant group grafted polypropylene.
Preferably, in the step (2), methacryloxypropylpolysilsesquioxane, triallyl phosphate, acetone and N, N-dimethylaniline are added in a ratio of 1.5 to 2 g: 2-2.4 g: 35-40 mL: 0.3-0.5 g.
Preferably, the addition ratio of the 45-55% isopropanol aqueous solution, the tetrabutyl titanate and the flame-retardant modified methacryloxypropylpolysilsesquioxane is 45-50 mL: 3-3.5 g: 10-12 g.
Preferably, in the step (4), the adding ratio of the polypropylene, the nano titanium dioxide-loaded graft modified methacryloxypropylpolysilsesquioxane, the diisopropyl peroxydicarbonate and the hexane is 8.2-8.6 g: 2.5-3 g: 0.15-0.3 g: 30-35 mL.
Preferably, the preparation process of the talcum powder grafted glass fiber comprises the following steps:
a. placing the dried talcum powder into absolute ethyl alcohol, stirring for 0.8-1h, heating to 55-60 ℃, dropwise adding a surface treating agent accounting for 45-50% of the weight of the talcum powder, stirring for 1.5-1.8h, washing with ethanol and distilled water under the action of vacuum filtration, and drying for 3-3.5h at 65-70 ℃ to obtain surface modified talcum powder;
b. weighing the surface modified talcum powder prepared in the step a, adding the surface modifying talcum powder into acetone, adding the surface treating agent, fully stirring for 0.5-0.8h, carrying out ultrasonic dispersion for 1-1.4h at the frequency of 60-70kHz to obtain uniform dispersion liquid, weighing glass fibers, adding the glass fibers into the uniform dispersion liquid, fully stirring for 0.6-0.8h, filtering, and drying at the temperature of 75-80 ℃ for 2.4-2.8h to obtain the talcum powder grafted glass fibers.
The talcum powder is grafted to the glass fiber, so that on one hand, the reinforcing materials can be integrated, the combination between the materials is tighter, the contact area and the reinforcing dimensionality of the glass fiber and the rest of the added base materials are increased, and the two material strength reinforcing modes of fiber reinforcement and particle reinforcement are effectively combined.
Preferably, in step a, the surface treatment agent is: adding vinyl tributyrinoxime silane and long-chain fatty alcohol-polyoxyethylene ether surfactant into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain the product, wherein the addition ratio of the vinyl tributyrinoxime silane, the long-chain fatty alcohol-polyoxyethylene ether and the absolute ethyl alcohol is 4.5-5 g: 1 g: 10-11 mL.
Preferably, in the step b, the adding proportion of the surface modified talcum powder, the acetone, the surface treating agent and the glass fiber is 0.8-1.2 g: 4.8-5.2 mL: 0.5-0.6 g: 3.5-4 g.
Preferably, the toughening agent is styrene-butadiene.
Preferably, in the step (5), the lubricant is at least one selected from the group consisting of natural paraffin, polyethylene wax and ethylene bis stearamide.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, a high-deformation friction-resistant group is grafted to polypropylene, so that the polypropylene has strong deformation resistance and crack propagation capacity, an inorganic core consisting of silica frameworks in Si-O alternate connection with the inorganic core can inhibit the chain motion of polymer molecules to endow the material with good thermal stability, mechanical property and flame retardance, and a phosphate group is combined to form an enhanced phosphorus-silicon synergistic flame retardant effect;
(2) the nano titanium dioxide is loaded on the polysilsesquioxane in the high-deformation friction-resistant group, so that the overall wear-resistant performance of the material is improved, the material has strong toughening and impact-resistant effects, and the material also has strong anti-aging effect;
(3) the talcum powder is grafted to the glass fiber, so that the tensile strength of the glass fiber is maintained, meanwhile, the talcum powder is loaded around the glass fiber, the strength enhancement modes of fiber enhancement and particle enhancement are effectively combined, the impact resistance of the high-deformation friction-resistant group grafted polypropylene base material is further enhanced, and the contact area of the high-deformation friction-resistant group grafted polypropylene base material and the base material is increased;
(4) the brittleness of the matrix material is reduced by adding styrene-butadiene, linear molecular chains of the styrene-butadiene copolymer can freely stretch and cover the peripheries of the high-deformation friction-resistant group grafted polypropylene and the talcum powder grafted glass fiber, and the styrene-butadiene copolymer can play a good role in compatibility, coating and fixing of the high-deformation friction-resistant group grafted polypropylene and the talcum powder grafted glass fiber.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
General examples
The polypropylene reinforced material for the operating table comprises the following raw materials in parts by weight:
the preparation process of the high-deformation friction-resistant group grafted polypropylene comprises the following steps:
(1) mixing methacryloxypropyltriethoxysilane, ethanol and concentrated hydrochloric acid according to a mass ratio of 2-2.5: 3-4: 0.6-0.8, adding the mixture into water with the volume 4-5 times of that of the mixture, reacting for 18-22h at the temperature of 50-56 ℃, and filtering and cleaning the product to obtain methacryloxypropyl polysilsesquioxane;
(2) adding methacryloxypropyl polysilsesquioxane and triallyl phosphate into acetone, uniformly stirring, adding N, N-dimethylaniline, heating to 88-92 ℃, stirring for reacting for 1.8-2.2h, removing the acetone to obtain the flame-retardant modified methacryloxypropyl polysilsesquioxane, wherein the adding proportion of the methacryloxypropyl polysilsesquioxane, the triallyl phosphate, the acetone and the N, N-dimethylaniline is 1.5-2 g: 2-2.4 g: 35-40 mL: 0.3-0.5 g;
(3) dispersing acetic acid in an isopropanol aqueous solution with the mass concentration of 45-55%, adjusting the pH value to 5-6.5, dropwise adding n-butyl titanate, stirring and hydrolyzing for 1.5-2h after dropwise adding, adding flame-retardant modified methacryloxypropyl polysilsesquioxane, aging for 10-12h after uniformly stirring, washing, drying for 20-22h at the temperature of 100 ℃ and 105 ℃, and obtaining the graft modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide, wherein the adding proportion of the 45-55% isopropanol aqueous solution, the n-butyl titanate and the flame-retardant modified methacryloxypropyl polysilsesquioxane is 45-50 mL: 3-3.5 g: 10-12 g;
(4) adding polypropylene, nano titanium dioxide-loaded graft modified methacryloxypropyl polysilsesquioxane and diisopropyl peroxydicarbonate into hexane, stirring for 2-2.5h, heating to 86-90 ℃ under the protection of nitrogen, reacting for 6-8h, and drying to obtain the high-deformation friction-resistant group grafted polypropylene, wherein the addition ratio of the polypropylene, the nano titanium dioxide-loaded graft modified methacryloxypropyl polysilsesquioxane, the diisopropyl peroxydicarbonate to the hexane is 8.2-8.6 g: 2.5-3 g: 0.15-0.3 g: 30-35 mL.
Wherein, the preparation process of the talcum powder grafted glass fiber comprises the following steps:
a. placing the dried talcum powder into absolute ethyl alcohol, stirring for 0.8-1h, heating to 55-60 ℃, dropwise adding a surface treating agent accounting for 45-50% of the weight of the talcum powder, stirring for 1.5-1.8h, washing with ethanol and distilled water under the action of vacuum filtration, and drying for 3-3.5h at 65-70 ℃ to obtain surface modified talcum powder;
the surface treating agent is: adding vinyl tributyrinoxime silane and long-chain fatty alcohol-polyoxyethylene ether surfactant into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain the product, wherein the addition ratio of the vinyl tributyrinoxime silane, the long-chain fatty alcohol-polyoxyethylene ether and the absolute ethyl alcohol is 4.5-5 g: 1 g: 10-11 mL;
b. weighing the surface modified talcum powder prepared in the step a, adding the surface modifying talcum powder into acetone, adding the surface treating agent, fully stirring for 0.5-0.8h, carrying out ultrasonic dispersion for 1-1.4h at the frequency of 60-70kHz to obtain uniform dispersion liquid, weighing glass fibers, adding the glass fibers into the uniform dispersion liquid, fully stirring for 0.6-0.8h, filtering, drying for 2.4-2.8h at the temperature of 75-80 ℃ to obtain talcum powder grafted glass fibers, wherein the adding proportion of the surface modified talcum powder, the acetone, the surface treating agent and the glass fibers is 0.8-1.2 g: 4.8-5.2 mL: 0.5-0.6 g: 3.5-4 g.
The lubricant is at least one selected from natural paraffin, polyethylene wax and ethylene bis stearamide.
Example 1
The polypropylene reinforced material for the operating table comprises the following raw materials in parts by weight:
the preparation process of the high-deformation friction-resistant group grafted polypropylene comprises the following steps:
(1) mixing methacryloxypropyltriethoxysilane, ethanol and concentrated hydrochloric acid according to a mass ratio of 2.2: 3.5: 0.7, adding the mixture into water with the volume 4.5 times that of the mixture, reacting for 20 hours at 53 ℃, and filtering and cleaning the product to obtain methacryloxypropyl polysilsesquioxane;
(2) adding methacryloxypropyl polysilsesquioxane and triallyl phosphate into acetone, uniformly stirring, adding N, N-dimethylaniline, heating to 90 ℃, stirring for reacting for 2 hours, removing the acetone to obtain the flame-retardant modified methacryloxypropyl polysilsesquioxane, wherein the adding proportion of the methacryloxypropyl polysilsesquioxane, the triallyl phosphate, the acetone and the N, N-dimethylaniline is 1.8 g: 2.2 g: 38mL of: 0.4 g;
(3) dispersing acetic acid in an isopropanol aqueous solution with the mass concentration of 45-55%, adjusting the pH value to 5.8, dropwise adding n-butyl titanate, stirring and hydrolyzing for 1.8h after dropwise adding, adding flame-retardant modified methacryloxypropyl polysilsesquioxane, aging for 11h and washing after uniformly stirring, drying for 21h at 102 ℃, and obtaining the grafted modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide after drying, wherein the adding proportion of the 50% isopropanol aqueous solution, the n-butyl titanate and the flame-retardant modified methacryloxypropyl polysilsesquioxane is 48 mL: 3.2 g: 11g of a reaction solution;
(4) adding polypropylene, graft modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide and diisopropyl peroxydicarbonate into hexane, stirring for 2.3h, heating to 88 ℃ under the protection of nitrogen for reaction for 7h, and drying to obtain the high-deformation friction-resistant group grafted polypropylene, wherein the addition ratio of the polypropylene, the graft modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide, the diisopropyl peroxydicarbonate to the hexane is 8.4 g: 2.8 g: 0.22 g: 33 mL.
Wherein, the preparation process of the talcum powder grafted glass fiber comprises the following steps:
a. placing the dried talcum powder into absolute ethyl alcohol, stirring for 0.9h, heating to 58 ℃, dropwise adding a surface treating agent accounting for 48% of the mass of the talcum powder, stirring for 1.65h, washing with ethanol and distilled water under the action of vacuum filtration, and drying at 68 ℃ for 3.2h to obtain surface modified talcum powder;
the surface treating agent is: adding vinyl tributyrinoxime silane and long-chain fatty alcohol-polyoxyethylene ether surfactant into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain the product, wherein the addition ratio of the vinyl tributyrinoxime silane, the long-chain fatty alcohol-polyoxyethylene ether and the absolute ethyl alcohol is 4.8 g: 1 g: 10.5 mL;
b. weighing the surface modified talcum powder prepared in the step a, adding the surface modifying talcum powder into acetone, adding the surface modifying agent, fully stirring for 0.65h, ultrasonically dispersing for 1.2h at the frequency of 65kHz to obtain uniform dispersion liquid, weighing glass fiber, adding the glass fiber into the uniform dispersion liquid, fully stirring for 0.7h, filtering, drying at the temperature of 78 ℃ for 2.6h to obtain talcum powder grafted glass fiber, wherein the adding proportion of the surface modified talcum powder, the acetone, the surface modifying agent and the glass fiber is 1 g: 5mL of: 0.55 g: 3.8 g.
Example 2
The polypropylene reinforced material for the operating table comprises the following raw materials in parts by weight:
the preparation process of the high-deformation friction-resistant group grafted polypropylene comprises the following steps:
(1) mixing methacryloxypropyltriethoxysilane, ethanol and concentrated hydrochloric acid according to a mass ratio of 2: 3: 0.6, adding the mixture into water with the volume 4 times that of the mixture, reacting for 18 hours at the temperature of 50 ℃, and filtering and cleaning the product to obtain methacryloxypropyl polysilsesquioxane;
(2) adding methacryloxypropyl polysilsesquioxane and triallyl phosphate into acetone, uniformly stirring, adding N, N-dimethylaniline, heating to 88 ℃, stirring and reacting for 1.8h, removing the acetone to obtain the flame-retardant modified methacryloxypropyl polysilsesquioxane, wherein the adding proportion of the methacryloxypropyl polysilsesquioxane, the triallyl phosphate, the acetone and the N, N-dimethylaniline is 1.5 g: 2 g: 35mL of: 0.3 g;
(3) dispersing acetic acid in an isopropanol aqueous solution with the mass concentration of 45%, adjusting the pH value to be 5, dropwise adding n-butyl titanate, stirring and hydrolyzing for 1.5h after dropwise adding, adding flame-retardant modified methacryloxypropyl polysilsesquioxane, aging for 10h after uniformly stirring, washing, drying for 20h at 100 ℃, and drying to obtain the grafted modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide, wherein the adding proportion of the 45% isopropanol aqueous solution, the 45% n-butyl titanate and the flame-retardant modified methacryloxypropyl polysilsesquioxane is 45 mL: 3 g: 10g of a mixture;
(4) adding polypropylene, nano titanium dioxide-loaded graft modified methacryloxypropyl polysilsesquioxane and diisopropyl peroxydicarbonate into hexane, stirring for 2 hours, heating to 86 ℃ under the protection of nitrogen for reaction for 6 hours, and drying to obtain the high-deformation friction-resistant group grafted polypropylene, wherein the addition ratio of the polypropylene to the nano titanium dioxide-loaded graft modified methacryloxypropyl polysilsesquioxane to the diisopropyl peroxydicarbonate to the hexane is 8.2 g: 2.5 g: 0.15 g: 30 mL.
Wherein the preparation process of the talcum powder grafted glass fiber comprises the following steps:
a. placing the dried talcum powder into absolute ethyl alcohol, stirring for 0.8h, heating to 55 ℃, dropwise adding a surface treating agent accounting for 45% of the mass of the talcum powder, stirring for 1.5h, washing with ethanol and distilled water under the action of vacuum filtration, and drying for 3h at 65 ℃ to obtain surface modified talcum powder;
the surface treating agent is: adding vinyl tributyrinoxime silane and long-chain fatty alcohol-polyoxyethylene ether surfactant into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain the product, wherein the addition ratio of the vinyl tributyrinoxime silane, the long-chain fatty alcohol-polyoxyethylene ether and the absolute ethyl alcohol is 4.5 g: 1 g: 10 mL;
b. weighing the surface modified talcum powder prepared in the step a, adding the surface modified talcum powder into acetone, adding the surface treating agent, fully stirring for 0.5h, performing ultrasonic dispersion for 1h at the frequency of 60kHz to obtain uniform dispersion liquid, weighing glass fiber, adding the glass fiber into the uniform dispersion liquid, fully stirring for 0.6h, filtering, drying at the temperature of 75 ℃ for 2.4h to obtain talcum powder grafted glass fiber, wherein the adding proportion of the surface modified talcum powder, the acetone, the surface treating agent and the glass fiber is 0.8 g: 4.8 mL: 0.5 g: 3.5 g.
Example 3
The polypropylene reinforced material for the operating table comprises the following raw materials in parts by weight:
the preparation process of the high-deformation friction-resistant group grafted polypropylene comprises the following steps:
(1) mixing methacryloxypropyltriethoxysilane, ethanol and concentrated hydrochloric acid according to a mass ratio of 2.5: 4: 0.8, adding the mixture into water with the volume 5 times that of the mixture, reacting for 22 hours at 56 ℃, filtering and cleaning the product to obtain methacryloxypropyl polysilsesquioxane;
(2) adding methacryloxypropyl polysilsesquioxane and triallyl phosphate into acetone, uniformly stirring, adding N, N-dimethylaniline, heating to 92 ℃, stirring and reacting for 2.2 hours, removing the acetone to obtain the flame-retardant modified methacryloxypropyl polysilsesquioxane, wherein the adding proportion of the methacryloxypropyl polysilsesquioxane, the triallyl phosphate, the acetone and the N, N-dimethylaniline is 2 g: 2.4 g: 40mL of: 0.5 g;
(3) dispersing acetic acid in an isopropanol aqueous solution with the mass concentration of 55%, adjusting the pH value to 6.5, dropwise adding n-butyl titanate, stirring and hydrolyzing for 2 hours after dropwise adding, adding flame-retardant modified methacryloxypropyl polysilsesquioxane, aging for 12 hours after uniformly stirring, washing, drying for 22 hours at 105 ℃, and drying to obtain the grafted modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide, wherein the adding proportion of the 55% isopropanol aqueous solution, the n-butyl titanate and the flame-retardant modified methacryloxypropyl polysilsesquioxane is 50 mL: 3.5 g: 12g of a mixture;
(4) adding polypropylene, graft modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide and diisopropyl peroxydicarbonate into hexane, stirring for 2.5 hours, heating to 90 ℃ under the protection of nitrogen for reacting for 8 hours, and drying to obtain the high-deformation friction-resistant group grafted polypropylene, wherein the addition ratio of the polypropylene, the graft modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide, the diisopropyl peroxydicarbonate to the hexane is 8.6 g: 3 g: 0.3 g: 35 mL.
Wherein, the preparation process of the talcum powder grafted glass fiber comprises the following steps:
a. placing the dried talcum powder into absolute ethyl alcohol, stirring for 1h, heating to 60 ℃, dropwise adding a surface treating agent accounting for 50% of the weight of the talcum powder, stirring for 1.8h, washing with ethanol and distilled water under the action of vacuum filtration, and drying at 70 ℃ for 3.5h to obtain surface modified talcum powder;
the surface treating agent is: adding vinyl tributyrinoxime silane and long-chain fatty alcohol-polyoxyethylene ether surfactant into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain the product, wherein the addition ratio of the vinyl tributyrinoxime silane, the long-chain fatty alcohol-polyoxyethylene ether and the absolute ethyl alcohol is 5 g: 1 g: 11 mL;
b. weighing the surface modified talcum powder prepared in the step a, adding the surface modified talcum powder into acetone, adding the surface treating agent, fully stirring for 0.8h, ultrasonically dispersing for 1.4h at the frequency of 70kHz to obtain uniform dispersion liquid, weighing glass fiber, adding the glass fiber into the uniform dispersion liquid, fully stirring for 0.8h, filtering, drying at the temperature of 80 ℃ for 2.8h to obtain talcum powder grafted glass fiber, wherein the adding proportion of the surface modified talcum powder, the acetone, the surface treating agent and the glass fiber is 1.2 g: 5.2 mL: 0.6 g: 4g of the total weight.
Comparative example 1 (different from example 1 in that polypropylene is not grafted with a high-deformation friction-resistant group, and is directly mixed) a polypropylene reinforcing material for a console, which comprises the following components in parts by weight:
the preparation method of the nano titanium dioxide supported graft modified methacryloxypropyl polysilsesquioxane is the same as that of the nano titanium dioxide supported graft modified methacryloxypropyl polysilsesquioxane in example 1.
Comparative example 2
The difference from example 1 is that titanium dioxide is not supported on the high-deformation friction-resistant group, and the rest of the preparation steps and the addition amount are the same as those of example 1.
Comparative example 3 (different from example 1 in that talc powder was not grafted to glass fiber, and was instead directly mixed.)
The polypropylene reinforced material for the operating table comprises the following raw materials in parts by weight:
comparative example 4 (different from example 1 in that talc powder-grafted glass fibers were replaced with equal amounts of glass fibers.) a bench polypropylene reinforcement, the raw materials of which comprise the following components in parts by weight:
comparative example 5 (different from example 1 in that no toughening agent styrene-butadiene was added.)
The polypropylene reinforced material for the operating table comprises the following raw materials in parts by weight:
the polypropylene materials of the above examples and comparative examples were pelletized by: stirring the added components at the rotating speed of 150-.
The obtained modified polypropylene master batch was used to prepare a sample bar to test its properties, and the results are shown in Table 1.
Wherein, the tensile property is tested according to the method in GB/T1040.1-2018;
the bending property is tested according to the method in GB/T9341-2008;
the impact performance is tested according to the method in GB/T1843-2008;
the quality abrasion is tested according to GB/T3960-2016 method for testing the sliding friction abrasion of plastics.
Table 1: and (4) testing the performance of the polypropylene reinforced material in each project.
And (4) conclusion: from examples 1 to 3, it can be seen that the polypropylene reinforced material for the operation table prepared only within the ranges of the additive components and the process parameters of the present invention has excellent tensile, bending and impact resistances, and also has strong heat resistance, flame retardancy, wear resistance, and water and oil repellency.
The difference between the comparative example 1 and the example 1 is that the polypropylene which is not grafted with the high deformation and friction-resistant groups is directly mixed, so that the connecting force and the compatibility between the polypropylene and the polypropylene which is not grafted with the high deformation and friction-resistant groups are reduced, and the overall mechanical property and other corresponding properties of a final product are further reduced; the difference between the comparative example 2 and the example 1 is that the titanium dioxide is not loaded on the high deformation friction-resistant group, which results in the reduction of the reinforcing effect, the wear resistance and the antifouling performance of the whole material. The difference between the comparative example 3 and the example 1 is that the talc powder is not grafted with the glass fiber, and the talc powder and the glass fiber are directly mixed, so that the integrity of the talc powder and the glass fiber is reduced, the binding capacity is poor, and the overall performance of the final material is reduced; the difference between comparative example 4 and example 1 is that the talc powder non-grafted glass fiber is replaced by the same amount of glass fiber, so that a multiple reinforcing effect cannot be formed, the combination degree of the glass fiber and other added components is reduced, and the wear resistance is greatly reduced; the difference between the comparative example 5 and the example 1 is that the toughening agent styrene-butadiene is not added, so that the compatibility and the bonding degree of each added component are greatly reduced, and finally, the comprehensive performance of the material is remarkably reduced and is even far lower than that of other groups.
As can be seen from the data of examples 1 to 3 and comparative examples 1 to 5, only the embodiments within the scope of the claims of the present invention can satisfy the above requirements in all respects, and an optimum embodiment can be obtained, and a polypropylene reinforced material for a console with optimum performance can be obtained. The change of the mixture ratio, the replacement/addition/subtraction of raw materials or the change of the feeding sequence can bring corresponding negative effects.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The polypropylene reinforced material for the operating table is characterized by comprising the following raw materials in parts by weight:
70-80 parts of high-deformation friction-resistant group grafted polypropylene;
20-25 parts of talcum powder grafted glass fiber;
5-8 parts of a toughening agent;
2-4 parts of a coloring agent;
0.5-1.5 parts of a lubricant;
the preparation process of the high-deformation friction-resistant group grafted polypropylene comprises the following steps:
(1) mixing methacryloxypropyltriethoxysilane, ethanol and concentrated hydrochloric acid according to a mass ratio of 2-2.5: 3-4: 0.6-0.8, adding the mixture into water with the volume 4-5 times of that of the mixture, reacting for 18-22h at the temperature of 50-56 ℃, and filtering and cleaning the product to obtain methacryloxypropyl polysilsesquioxane;
(2) adding methacryloxypropyl polysilsesquioxane and triallyl phosphate into acetone, uniformly stirring, adding N, N-dimethylaniline, heating to 88-92 ℃, stirring for reacting for 1.8-2.2h, and removing acetone to obtain the flame-retardant modified methacryloxypropyl polysilsesquioxane;
(3) dispersing acetic acid in an isopropanol aqueous solution with the mass concentration of 45-55%, adjusting the pH value to 5-6.5, dropwise adding n-butyl titanate, stirring and hydrolyzing for 1.5-2h after dropwise adding, adding flame-retardant modified methacryloxypropyl polysilsesquioxane, aging for 10-12h after uniformly stirring, washing, drying for 20-22h at the temperature of 100-;
(4) adding polypropylene, graft modified methacryloxypropyl polysilsesquioxane loaded with nano titanium dioxide and diisopropyl peroxydicarbonate into hexane, stirring for 2-2.5h, heating to 86-90 ℃ under the protection of nitrogen, reacting for 6-8h, and drying to obtain the high-deformation friction-resistant group grafted polypropylene;
the toughening agent is styrene-butadiene.
2. The polypropylene reinforced material for benchmarks as claimed in claim 1, wherein in step (2), methacryloxypropylpolysilsesquioxane, triallyl phosphate, acetone and N, N-dimethylaniline are added in a ratio of 1.5 to 2 g: 2-2.4 g: 35-40 mL: 0.3-0.5 g.
3. The reinforced polypropylene material for benchmarks as claimed in claim 1, wherein in step (3), 45-55% aqueous isopropanol solution, n-butyl titanate and flame-retardant modified methacryloxypropyl polysilsesquioxane are added in a proportion of 45-50 mL: 3-3.5 g: 10-12 g.
4. The polypropylene reinforced material for benchmarks as claimed in claim 1, wherein in step (4), the addition ratio of polypropylene, nano-titania-supported graft-modified methacryloxypropylpolysilsesquioxane, diisopropyl peroxydicarbonate and hexane is 8.2-8.6 g: 2.5-3 g: 0.15-0.3 g: 30-35 mL.
5. The polypropylene reinforced material for the operation table as claimed in claim 1, wherein the talc powder grafted glass fiber is prepared by the following steps:
a. placing the dried talcum powder into absolute ethyl alcohol, stirring for 0.8-1h, heating to 55-60 ℃, dropwise adding a surface treating agent accounting for 45-50% of the weight of the talcum powder, stirring for 1.5-1.8h, washing with ethanol and distilled water under the action of vacuum filtration, and drying for 3-3.5h at 65-70 ℃ to obtain surface modified talcum powder;
b. weighing the surface modified talcum powder prepared in the step a, adding the surface modifying talcum powder into acetone, adding the surface treating agent, fully stirring for 0.5-0.8h, carrying out ultrasonic dispersion for 1-1.4h at the frequency of 60-70kHz to obtain uniform dispersion liquid, weighing glass fibers, adding the glass fibers into the uniform dispersion liquid, fully stirring for 0.6-0.8h, filtering, and drying at the temperature of 75-80 ℃ for 2.4-2.8h to obtain the talcum powder grafted glass fibers.
6. The polypropylene reinforced material for the operation table as claimed in claim 5, wherein in the step a, the surface treatment agent is: adding vinyl tributyrinoxime silane and long-chain fatty alcohol-polyoxyethylene ether surfactant into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain the product, wherein the addition ratio of the vinyl tributyrinoxime silane, the long-chain fatty alcohol-polyoxyethylene ether and the absolute ethyl alcohol is 4.5-5 g: 1 g: 10-11 mL.
7. The polypropylene reinforced material for the operation table as recited in claim 5, wherein in the step b, the surface modified talc powder, the acetone, the surface treatment agent and the glass fiber are added in a ratio of 0.8 to 1.2 g: 4.8-5.2 mL: 0.5-0.6 g: 3.5-4 g.
8. The polypropylene reinforced material for a workbench according to claim 1, wherein the lubricant is at least one selected from natural paraffin, polyethylene wax and ethylene bis stearamide.
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