CN112011120B - Modified resin material for purifying domestic water and preparation method thereof - Google Patents
Modified resin material for purifying domestic water and preparation method thereof Download PDFInfo
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- CN112011120B CN112011120B CN201910459081.4A CN201910459081A CN112011120B CN 112011120 B CN112011120 B CN 112011120B CN 201910459081 A CN201910459081 A CN 201910459081A CN 112011120 B CN112011120 B CN 112011120B
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing compounds
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a modified resin material for purifying domestic water and a preparation method thereof, wherein the modified resin material comprises the following components in percentage by weight: 88 to 97.6 percent of polypropylene; 2-10% of a purification modifier; 0.2 to 1 percent of heat stabilizer; 0.2-1% of processing aid; according to the invention, the Zr (IV) -loaded divinylbenzene and vinylphenyl-N, N, N-trimethyl ammonium hydroxide polymer are prepared by utilizing the selective adsorption effect of Zr on fluorine, and are used as purification modifiers to modify the polypropylene material, so that the modified resin material which has high adsorption speed and strong adsorption capacity and is used for purifying domestic water is prepared, and the obtained modified resin material can be used for preparing products such as domestic water pipelines, containers and the like, so that the functionality of the polypropylene material is improved, and the application field and the additional value of the polypropylene material are increased.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a modified resin material for purifying domestic water and a preparation method thereof.
Background
As the important components of human body, water has become more and more important as people pay more attention to health and diseases, and the attention to water quality is particularly important. And the fluorine content in tap water is high due to the discharge of fertilizers and industrial wastes and the existence of a large amount of rock fluorine in parts of northern China. Excessive fluorine intake can cause fluorosis chronic diseases of the body, and affect bone and tooth health. The prior common technologies for removing fluorine in water include a precipitation method and an adsorption method, wherein the precipitation method needs a large amount of precipitator and the precipitate causes secondary pollution. The chemical adsorption method has relatively flexible adsorbent selectivity and is relatively environment-friendly, active carbon and aluminum ions are commonly used as the adsorbents at present, but the adsorbents have poor adsorption capacity and are not beneficial to being used in a long-term use environment, and the aluminum ion adsorbents have poor performance in neutral and alkaline water, so the aluminum ion adsorbents are not suitable for the field of purification of domestic water.
The invention uses anion exchange resin materials of divinyl benzene, vinyl phenyl-N, N, N-trimethyl ammonium hydroxide polymer and Zr (SO)4)2·4H2And carrying out O reaction to obtain the Zr (IV) -loaded purification modifier, and then carrying out melt blending with polypropylene to obtain the modified resin material for purifying the domestic water. The invention utilizes the selective adsorption effect of Zr on fluorine to obtain a modified resin material which can be used for preparing products such as water pipelines for daily life, containers and the like, improves the functionality of polypropylene materials and expands the application range of the polypropylene materials in the field of water quality purification.
Disclosure of Invention
The invention aims to provide a modified resin material for purifying domestic water and a preparation method thereof, which can effectively remove fluorine element in the domestic water by selectively adsorbing the fluorine element in the domestic water and solve the problems of high fluorine content, high treatment difficulty and non-ideal purification effect in the domestic water in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a modified resin material for purifying domestic water comprises the following components in percentage by weight:
88 to 97.6 percent of polypropylene;
2-10% of a purification modifier;
0.2 to 1 percent of heat stabilizer;
0.2-1% of processing aid;
wherein the purification modifier is a divinylbenzene and vinylphenyl-N, N, N-trimethyl ammonium hydroxide polymer loaded with Zr ions.
In a further scheme, the purification modifier is prepared by the following steps:
(1) reacting divinylbenzene with a polymer of vinylphenyl-N, N, N-trimethylammonium hydroxideAdding into distilled water at room temperature, stirring, dispersing, adding H2SO4Adjusting the pH to 1.5-2.0 to obtain a polymer dispersion;
(2) zr (SO)4)2·4H2Adding O into the polymer dispersion liquid, and carrying out ion exchange reaction under the stirring condition; then adding alkali liquor to adjust the pH value of the polymer dispersion liquid to 4-4.5, and continuously reacting for 4-8h at the temperature of 40-45 ℃ to obtain a crude product;
(3) and washing and drying the crude product by using an organic solvent to obtain the purification modifier.
In a further scheme, the polypropylene is at least one of copolymerized polypropylene and homopolymerized polypropylene, the heat stabilizer is at least one of phenols and phosphite heat stabilizers, and the processing aid is at least one of calcium stearate and zinc stearate.
Further, in the step (1), 1g of divinylbenzene and a polymer of vinylphenyl-N, N, N-trimethylammonium hydroxide are dispersed in 20 to 40mL of distilled water, and the H is2SO4The concentration of (b) is 1mol/L to 3 mol/L.
In a further scheme, the temperature of the ion exchange reaction in the step (2) is 22-30 ℃, and the time is 2-8 h.
Further, the divinylbenzene polymer with vinylphenyl-N, N, N-trimethylammoniumhydroxide and Zr (SO)4)2·4H2The mass ratio of O is 1 (1-2).
In the further scheme, the alkali liquor in the step (2) is NaOH solution or KOH solution, and the concentration of the alkali liquor is 0.5-1 mol/L.
In a further scheme, the organic solvent in the step (3) is ethanol or acetone.
Another object of the present invention is to provide a method for preparing the above modified resin material, which comprises the following steps: mixing the polypropylene, the purification modifier, the heat stabilizer and the processing aid according to the proportion, adding the mixture into a double-screw extruder, melting, mixing and dispersing at the temperature of 180-220 ℃, and extruding and granulating.
In a further scheme, the length-diameter ratio of the double-screw extruder is (36-40): 1.
Has the advantages that:
1. the invention uses the selective adsorption effect of Zr on fluorine, and proposes to use divinylbenzene loaded with Zr ions and vinyl phenyl-N, N, N-trimethyl ammonium hydroxide polymer as a purification modifier to modify a polypropylene material for the first time to prepare the modified resin material for purifying domestic water, and the obtained modified resin material can be used for preparing products such as domestic water pipelines, containers and the like, so that the functionality of the polypropylene material is improved, and the application field and the added value of the polypropylene material are increased.
2. The modified resin material for purifying domestic water prepared by the invention is used for removing fluorine by an adsorption method, and the divinylbenzene and the vinylphenyl-N, N, N-trimethyl ammonium hydroxide polymer have a large amount of polar groups, so that the defects of slow adsorption speed and poor adsorbability under neutral and alkaline conditions of the traditional fluorine adsorption material are overcome, and the modified resin material for purifying domestic water with high adsorption speed and strong adsorbability is prepared.
3. Zr (SO) in the invention4)2·4H2O can be ionized into [ ZrO (SO) when dissolved in water4)2·3H2O]2-And then carrying out anion exchange with the divinylbenzene and the vinylphenyl-N, N, N-trimethyl ammonium hydroxide polymer to obtain the Zr (IV) -loaded divinylbenzene and vinylphenyl-N, N, N-trimethyl ammonium hydroxide polymer material. And H is added in the preparation process2SO4Obtaining Zr-SO4Bond, can prevent [ ZrO (SO)4)2·3H2O]2-Agglomeration in water to make the reaction more complete, and then addition of OH generated by alkali-Ion substituted SO4 2-Ions and generation of ZrO2The precipitates are adsorbed on the surfaces of divinylbenzene and vinylphenyl-N, N, N-trimethylammoniumhydroxide polymers and may also contribute to the adsorption of fluorine.
Detailed Description
The present invention will be further described with reference to the following examples. It is to be understood that the embodiments described are only a few 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.
Example 1
Mixing 94% of copolymerized polypropylene, 5% of purification modifier, 0.5% of phenolic heat stabilizer 1010(Ciba SC) and 0.5% of processing aid calcium stearate in proportion, adding the mixture into a double-screw extruder with the length-diameter ratio of 38:1, and processing temperature of each section: the modified resin material for purifying the domestic water can be obtained by melt extrusion granulation under the conditions of 180 ℃ in the first zone, 180 ℃ in the second zone, 185 ℃ in the third zone, 185 ℃ in the fourth zone, 190 ℃ in the fifth zone, 190 ℃ in the sixth zone, 190 ℃ in the seventh zone, 190 ℃ in the eighth zone, 190 ℃ in the ninth zone and the screw rotation speed of 250 r/min.
Wherein the preparation process of the purification modifier is as follows:
200g of divinylbenzene and a polymer of vinylphenyl-N, N, N-trimethylammonium hydroxide are added to 6000mL of distilled water at room temperature and stirred for 18 hours, using a concentration of 2mol/LH2SO4Adjusting the pH of the solution to 1.8; adding 300g of Zr (SO)4)2·4H2Adding O into the solution, stirring and reacting for 5 hours at 25 ℃, adjusting the pH of the solution to 4.2 by using a NaOH solution with the concentration of 0.8mol/L, and continuing to react for 6 hours at 42 ℃; washing the product with ethanol, and drying to obtain the purification modifier.
Example 2
Mixing 90.4% of homopolymerized polypropylene, 8% of purification modifier, 0.8% of phenolic heat stabilizer 1076(Ciba SC) and 0.8% of processing aid calcium stearate in proportion, adding the mixture into a double-screw extruder with the length-diameter ratio of 36:1, and processing the mixture at each section: the modified resin material for purifying the domestic water can be obtained by melt extrusion granulation under the conditions of 190 ℃ in the first zone, 190 ℃ in the second zone, 190 ℃ in the third zone, 195 ℃ in the fourth zone, 195 ℃ in the fifth zone, 195 ℃ in the sixth zone, 200 ℃ in the seventh zone, 200 ℃ in the eighth zone, 200 ℃ in the ninth zone and the screw rotation speed of 250 r/min.
Wherein the preparation process of the purification modifier is as follows:
100g of divinylbenzene and a polymer of vinylphenyl-N, N, N-trimethylammonium hydroxide were added to 2500mL of distilled water at room temperature and stirred for 16 hours,with a concentration of 1.5mol/L H2SO4Adjusting the pH of the solution to 1.6; 180g of Zr (SO)4)2·4H2Adding O into the solution, stirring and reacting for 4 hours at the temperature of 28 ℃, adjusting the pH of the solution to 4.3 by using a KOH solution with the concentration of 0.6mol/L, and continuing to react for 5 hours at the temperature of 44 ℃; washing the product with ethanol, and drying to obtain the purification modifier.
Example 3
Mixing 45.2% of polypropylene copolymer, 50% of polypropylene homopolymer, 4% of purification modifier, 0.4% of phosphite ester heat stabilizer 168(Ciba SC) and 0.4% of processing aid zinc stearate in proportion, adding the mixture into a double-screw extruder with the length-diameter ratio of 40:1, and processing temperature of each section: the modified resin material for purifying the domestic water can be obtained by melt extrusion granulation under the conditions of 190 ℃ in the first zone, 190 ℃ in the second zone, 195 ℃ in the third zone, 195 ℃ in the fourth zone, 200 ℃ in the fifth zone, 200 ℃ in the sixth zone, 210 ℃ in the seventh zone, 210 ℃ in the eighth zone, 210 ℃ in the ninth zone and the screw rotation speed of 250 r/min.
Wherein the preparation process of the purification modifier is as follows:
300g of divinylbenzene and the polymer vinylphenyl-N, N, N-trimethylammonium hydroxide were added to 6600mL of distilled water at room temperature and stirred for 20 hours with a concentration of 2.5mol/L H2SO4Adjusting the pH of the solution to 1.7; adding 360g of Zr (SO)4)2·4H2Adding O into the solution, stirring and reacting for 7 hours at the temperature of 24 ℃, adjusting the pH of the solution to 4.4 by using a NaOH solution with the concentration of 0.9mol/L, and continuing to react for 7 hours at the temperature of 43 ℃; washing the product with ethanol, and drying to obtain the purification modifier.
Example 4
97.6 percent of copolymerized polypropylene, 2 percent of purification modifier, 0.1 percent of phosphite heat stabilizer 168(Ciba SC), 0.1 percent of phenol heat stabilizer 1010(Ciba SC) and 0.2 percent of processing aid calcium stearate are mixed according to the proportion and then added into a double-screw extruder with the length-diameter ratio of 36:1, the processing temperature of each section is as follows: the modified resin material for purifying the domestic water can be obtained by melt extrusion granulation under the conditions of 200 ℃ in the first zone, 200 ℃ in the second zone, 200 ℃ in the third zone, 210 ℃ in the fourth zone, 210 ℃ in the fifth zone, 210 ℃ in the sixth zone, 215 ℃ in the seventh zone, 215 ℃ in the eighth zone, 220 ℃ in the ninth zone and the screw rotation speed of 250 r/min.
Wherein the preparation process of the purification modifier is as follows:
100g of divinylbenzene and a polymer of vinylphenyl-N, N, N-trimethylammonium hydroxide were added to 2000mL of distilled water at room temperature and stirred for 10 hours with a concentration of 1mol/L H2SO4Adjusting the pH of the solution to 1.5; 100g of Zr (SO)4)2·4H2Adding O into the solution, stirring and reacting for 2 hours at the temperature of 22 ℃, adjusting the pH of the solution to 4 by using a NaOH solution with the concentration of 0.5mol/L, and continuing to react for 4 hours at the temperature of 40 ℃; washing the product with ethanol, and drying to obtain the purification modifier.
Example 5
88 percent of copolymerized polypropylene, 10 percent of purification modifier, 0.3 percent of phenolic heat stabilizer 1010(Ciba SC), 0.4 percent of phosphite heat stabilizer, 0.5 percent of processing aid calcium stearate and 0.5 percent of zinc stearate are mixed according to the proportion and then added into a double-screw extruder with the length-diameter ratio of 40:1, the processing temperature of each section is as follows: the modified resin material for purifying the domestic water can be obtained by melt extrusion granulation under the conditions of 200 ℃ in the first zone, 200 ℃ in the second zone, 200 ℃ in the third zone, 210 ℃ in the fourth zone, 210 ℃ in the fifth zone, 210 ℃ in the sixth zone, 215 ℃ in the seventh zone, 215 ℃ in the eighth zone, 220 ℃ in the ninth zone and the screw rotation speed of 250 r/min.
Wherein the preparation process of the purification modifier is as follows:
100g of divinylbenzene and a polymer of vinylphenyl-N, N, N-trimethylammonium hydroxide are added to 4000mL of distilled water at room temperature and stirred for 24 hours with a concentration of 3mol/L H2SO4Adjusting the pH of the solution to 2.0; 200g of Zr (SO)4)2·4H2Adding O into the solution, stirring and reacting for 8 hours at the temperature of 30 ℃, adjusting the pH of the solution to 4.5 by using a NaOH solution with the concentration of 1mol/L, and continuing to react for 8 hours at the temperature of 45 ℃; washing the product with ethanol, and drying to obtain the purification modifier.
And (4) analyzing results:
preparing the modified resin prepared in the above example into a square piece with the size of 40 × 1mm, placing the square piece into a fluorine ion solution with the concentration of 100mg/L, shaking the square piece for 4 hours at the temperature of 23 ℃, measuring the fluorine ion content in the fluorine ion solution after treatment, and calculating the removal rate; in addition, the results of the comparative tests on activated carbon are shown in the following table 1:
TABLE 1 experimental results of fluoride ion removal rate
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Activated carbon | |
| Fluoride ion removal Rate (%) | 73.4 | 68.9 | 76.1 | 66.3 | 83.6 | 23.8 |
As can be seen from the results in Table 1, the modified resin material for purifying domestic water prepared by the invention has better effect of removing fluorine ions in aqueous solution compared with the conventional adsorbents such as activated carbon.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications can be made to the embodiments and the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make modifications and alterations without departing from the scope of the present invention.
Claims (9)
1. A modified resin material for purifying domestic water, which is characterized in that: the composition comprises the following components in percentage by weight:
88 to 97.6 percent of polypropylene;
2-10% of a purification modifier;
0.2 to 1 percent of heat stabilizer;
0.2-1% of processing aid;
wherein the purifying modifier is a divinylbenzene and vinylphenyl-N, N, N-trimethyl ammonium hydroxide polymer loaded with Zr ions; the purification modifier is prepared by the following steps:
(1) adding divinyl benzene and vinyl phenyl-N, N, N-trimethyl ammonium hydroxide polymer into distilled water at room temperature, stirring for dispersion, adding H2SO4Adjusting the pH to 1.5-2.0 to obtain a polymer dispersion;
(2) zr (SO)4)2·4H2Adding O into the polymer dispersion liquid, and carrying out ion exchange reaction under the stirring condition; then adding alkali liquor to adjust the pH value of the polymer dispersion liquid to 4-4.5, and continuously reacting for 4-8h at the temperature of 40-45 ℃ to obtain a crude product;
(3) and washing and drying the crude product by using an organic solvent to obtain the purification modifier.
2. The modified resin material according to claim 1, characterized in that: the polypropylene is at least one of copolymerized polypropylene and homopolymerized polypropylene, the heat stabilizer is at least one of phenols and phosphite heat stabilizers, and the processing aid is at least one of calcium stearate and zinc stearate.
3. The modified resin material according to claim 1, characterized in that: in the step (1), 1g of divinylbenzene and a polymer of vinylphenyl-N, N, N-trimethylammonium hydroxide are dispersed in 20 to 40mL of distilled water, and the H2SO4The concentration of (b) is 1mol/L to 3 mol/L.
4. The modified resin material according to claim 1, characterized in that: the temperature of the ion exchange reaction in the step (2) is 22-30 ℃, and the time is 2-8 h.
5. The modified resin material according to claim 1, characterized in that: the divinylbenzene polymer with vinylphenyl-N, N, N-trimethylammoniumhydroxide and Zr (SO)4)2·4H2The mass ratio of O is 1 (1-2).
6. The modified resin material according to claim 1, characterized in that: and (3) in the step (2), the alkali liquor is NaOH solution or KOH solution, and the concentration of the alkali liquor is 0.5-1 mol/L.
7. The modified resin material according to claim 1, characterized in that: and (4) the organic solvent in the step (3) is ethanol or acetone.
8. A method for producing a modified resin material as defined in any one of claims 1 to 7, characterized in that: mixing the polypropylene, the purification modifier, the heat stabilizer and the processing aid according to the proportion, adding the mixture into a double-screw extruder, melting, mixing and dispersing at the temperature of 180-220 ℃, and extruding and granulating.
9. The method of claim 8, wherein: the length-diameter ratio of the double-screw extruder is (36-40) 1.
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