CN110643114A - Polypropylene-sludge composite material for producing building template and method thereof - Google Patents

Polypropylene-sludge composite material for producing building template and method thereof Download PDF

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CN110643114A
CN110643114A CN201910963049.XA CN201910963049A CN110643114A CN 110643114 A CN110643114 A CN 110643114A CN 201910963049 A CN201910963049 A CN 201910963049A CN 110643114 A CN110643114 A CN 110643114A
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parts
sludge
polypropylene
stirring
composite material
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盛嘉伟
张俭
严俊
孙青�
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Wenzhou Institute Of Science And Technology Zhejiang University Of Technology
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Wenzhou Institute Of Science And Technology Zhejiang University Of Technology
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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
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/005—Additives being defined by their particle size in general
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • 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
    • 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
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • 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
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
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Abstract

The invention provides a polypropylene-sludge composite material for producing building templates, which is prepared from the following raw materials in parts by weight: 15-35 parts of polypropylene, 40-65 parts of sludge, 5-25 parts of wood powder, 0.5-1 part of rutile titanium dioxide, 0.5-1 part of talcum powder, 1-5 parts of epoxidized soybean oil, 0.05-0.2 part of nucleating agent, 0.1-0.5 part of impact modifier, 1-5 parts of chlorinated paraffin, 0.1-0.5 part of dispersant, 0.1-0.5 part of aluminate, 0.1-0.3 part of antioxidant, 0.1-0.5 part of anti-ultraviolet absorbent and 1-5 parts of paraffin. The advantages are that: the mechanical, tensile strength, elastic modulus, impact resistance, aging resistance and thermal properties of the inorganic filler and polypropylene composite material are improved, and the service cycle of the inorganic filler and polypropylene composite material is prolonged.

Description

Polypropylene-sludge composite material for producing building template and method thereof
Technical Field
The invention relates to the field of stable resource and harmless utilization of sludge generated by urban sewage treatment plants, in particular to a novel polypropylene-sludge environment-friendly reinforced composite material prepared by using sludge as a main filler and a preparation method thereof.
Background
With the gradual improvement of the economic culture level, the measures of the Chinese society for environmental protection are rapidly strengthened, and various effective environmental protection policies such as 'refuse to foreign garbage', 'five water co-treatment' and the like are continuously proposed and implemented. The green environmental protection concepts of energy conservation, consumption reduction and the like gradually enter the daily production and life of people, and the protection of the ecological environment and the efficient utilization of natural resources are hot spots and difficult problems in the front of scientific researchers.
At present, a large amount of sludge is generated in municipal sewage treatment plants, the traditional and simplest method of sludge treatment is direct landfill, but the landfill treatment mode not only occupies a large amount of land resources, but also has potential environmental pollution risks, mainly, harmful substances in the buried sludge are likely to permeate into the ground, and migratable heavy metal elements are released to the ecological environment to cause harm to the ecological environment and physical and psychological health of people. Experiments show that the main chemical compositions of the sludge comprise CaO and SiO2、Al2O3And Fe2O3And the like. The chemical composition of the sludge is basically similar to that of the alumino-silica clay mineral in terms of the composition of the sludge and the attribution of materials. Therefore, under the background that the natural resources such as calcium carbonate and clay are increasingly limited in mining and gradually depleted in resources but the demand of the natural resources is continuously increased, the sludge is used as a supplement or even a substitute material of the calcium carbonate and clay materials and used for preparing composite materials such as building templates, outdoor decorative profiles, wire and cable sheath materials, non-woven fabrics and the like, and the sludge can generate huge environmental protection and economic values and is an effective way for really realizing resource utilization of the sludge.
On the premise of vigorously building 'non-waste cities' in China, all the links of 'source reduction, intelligent classification, green treatment, efficient conversion, deep processing, ecological balance' and the like of solid wastes are actively involved, so that the work is necessary and urgent, and the green stabilization treatment and the efficient resource treatment of sludge of different sources and types are urgently needed to be developed.
Disclosure of Invention
The invention provides a polypropylene-sludge composite material for producing building templates and a method thereof, which are prepared by adopting sludge, polypropylene and various auxiliaries aiming at the current situation of treatment of harmful solid wastes such as sludge and the like in China.
The purpose of the invention is realized by the following scheme: a polypropylene-sludge composite material for producing building templates is prepared from the following raw materials in parts by weight:
15-35 parts of polypropylene;
40-65 parts of sludge;
5-25 parts of wood powder;
0.5-1 part of rutile titanium dioxide;
0.5-1 part of talcum powder;
1-5 parts of epoxidized soybean oil;
0.05 to 0.2 portion of nucleating agent;
0.1-0.5 part of impact modifier;
1-5 parts of chlorinated paraffin;
0.1-0.5 part of dispersant;
0.1 to 0.5 portion of aluminate ester;
0.1 to 0.3 portion of antioxidant;
0.1-0.5 part of anti-ultraviolet absorbent;
1-5 parts of paraffin.
Further, the following raw materials in parts by weight are preferred:
15-25 parts of polypropylene;
40-50 parts of sludge;
10-15 parts of wood powder;
0.5-1 part of rutile titanium dioxide;
0.5-1 part of talcum powder;
3-5 parts of epoxidized soybean oil;
0.08 to 0.1 portion of nucleating agent;
0.1-0.2 part of impact modifier;
3-5 parts of chlorinated paraffin;
0.3-0.5 part of dispersant;
0.3 to 0.5 portion of aluminate ester;
0.1-0.2 part of antioxidant;
0.1-0.2 part of anti-ultraviolet absorbent;
3-5 parts of paraffin.
Further, the sludge in the raw materials is sludge of a municipal sewage treatment plant.
Further, the dispersant in the raw material is stearate, including but not limited to sodium stearate, calcium stearate, zinc stearate.
Furthermore, the particle size range of the rutile titanium dioxide and the talcum powder in the raw materials is 1000-1500 meshes.
Furthermore, the grain size of the wood flour in the raw material is 80-400 meshes.
A method of making a composite material, the method comprising the steps of:
(1) pretreatment of inorganic filler and organic carrier:
1-1, drying and deodorizing the sludge at 300-450 ℃, and removing water and organic matters after the drying treatment lasts for 2 hours; mechanically crushing the dried sludge;
1-2, performing high-stirring mixing and modification in the first stage: stirring and mixing the dried and crushed sludge fine powder, the talcum powder, the wood powder and the rutile type titanium dioxide at a high speed according to a set dosage ratio to uniformly mix all the materials; high stirring in the second stage: after the temperature of the grinding system reaches 100 ℃, high stirring is continued for 10-20 min, and the water in the mixed powder is fully removed; and (3) high stirring in the third stage: adding a certain amount of aluminate and stearic acid into the materials, and stirring for 10-15 min to obtain uniformly mixed modified filler powder A;
1-3, first stage: carrying out high-stirring preheating on polypropylene to remove adsorbed water on the surface; and a second stage: after the temperature of the grinding system reaches 100 ℃, continuously stirring the materials for 10-20 min; and a third stage: adding epoxidized soybean oil, a nucleating agent, chlorinated paraffin and paraffin according to a set dosage ratio, and stirring the mixed material for 10-30 min to obtain an organic carrier mixed material B;
(2) mixing the modified inorganic mixed filler powder A prepared in the step (1) with an organic carrier mixed material B, quantitatively adding an impact modifier, an antioxidant and an ultraviolet-resistant absorbent, and carrying out high-stirring mixing for 20-60 min to obtain a mixed material C;
(3) and transferring the mixed material C into a double-screw device for melting, plasticizing, extruding and granulating to obtain the composite material.
A method for producing a composite material, wherein in said step (1) 1-1: the grain size of the crushed sludge is 1200-1500 meshes.
A method for preparing a composite material, wherein in the step (1) 1-2: the oil absorption value of the modified filler powder A is lower than 35 ml BOP/100 g powder A.
The invention has the beneficial effects that:
1. the composite material is prepared by taking a large amount of sludge generated by a sewage treatment plant as the inorganic filler, so that the environment-friendly treatment and resource utilization of the sludge are realized, and the composite material has good economic and social benefits;
2. compared with the traditional calcium carbonate composite material, the composite material prepared by adopting the sludge as the main filler has the advantages that the bending strength, the tensile strength, the elastic modulus, the impact resistance, the aging resistance, the thermal property and the like are greatly improved;
3. the composite material is prepared by adopting sludge as a main filler and polypropylene PP as an organic carrier, effectively slows down or obstructs the release of harmful elements in the ecological environment, and is a novel functional and environment-friendly material.
Detailed Description
The invention is further illustrated by the following specific examples:
example 1, the polypropylene-sludge composite material for producing building templates of the present invention is prepared from the following raw materials in parts by weight:
15-35 parts of polypropylene;
40-65 parts of sludge;
5-25 parts of wood powder;
0.5-1 part of rutile titanium dioxide;
0.5-1 part of talcum powder;
1-5 parts of epoxidized soybean oil;
0.05 to 0.2 portion of nucleating agent;
0.1-0.5 part of impact modifier;
1-5 parts of chlorinated paraffin;
0.1-0.5 part of dispersant;
0.1 to 0.5 portion of aluminate ester;
0.1 to 0.3 portion of antioxidant;
0.1-0.5 part of anti-ultraviolet absorbent;
1-5 parts of paraffin.
The polypropylene-sludge composite material for producing building templates is prepared by preferably selecting the following raw materials in parts by weight:
15-25 parts of polypropylene;
40-50 parts of sludge;
10-15 parts of wood powder;
0.5-1 part of rutile titanium dioxide;
0.5-1 part of talcum powder;
3-5 parts of epoxidized soybean oil;
0.08 to 0.1 portion of nucleating agent;
0.1-0.2 part of impact modifier;
3-5 parts of chlorinated paraffin;
0.3-0.5 part of dispersant;
0.3 to 0.5 portion of aluminate ester;
0.1-0.2 part of antioxidant;
0.1-0.2 part of anti-ultraviolet absorbent;
3-5 parts of paraffin.
The composite polypropylene-sludge material for producing building template is prepared with sludge from city sewage treating plant and sludge in the particle size range of 1200-1500 mesh after grinding.
A polypropylene-sludge composite material for producing building templates is prepared from stearate including but not limited to sodium stearate, calcium stearate and zinc stearate as disperser.
The composite polypropylene-sludge material for producing building template has rutile-type titania and talcum powder in the grain size range of 1000-1500 mesh.
The polypropylene-sludge composite material for producing building template has wood powder of 80-400 mesh size.
A method of making a composite material, the method comprising the steps of:
(1) pretreatment of inorganic filler and organic carrier:
1-1, drying and deodorizing the sludge at 300-450 ℃, and removing water and organic matters after the drying treatment lasts for 2 hours; mechanically crushing the dried sludge;
1-2, performing high-stirring mixing and modification in the first stage: stirring and mixing the dried and crushed sludge fine powder, the talcum powder, the wood powder and the rutile type titanium dioxide at a high speed according to a set dosage ratio to uniformly mix all the materials; high stirring in the second stage: after the temperature of the grinding system reaches 100 ℃, high stirring is continued for 10-20 min, and the water in the mixed powder is fully removed; and (3) high stirring in the third stage: adding a certain amount of aluminate and stearic acid into the materials, and stirring for 10-15 min to obtain uniformly mixed modified filler powder A;
1-3, first stage: carrying out high-stirring preheating on polypropylene to remove adsorbed water on the surface; and a second stage: after the temperature of the grinding system reaches 100 ℃, continuously stirring the materials for 10-20 min; and a third stage: adding epoxidized soybean oil, a nucleating agent, chlorinated paraffin and paraffin according to a set dosage ratio, and stirring the mixed material for 10-30 min to obtain an organic carrier mixed material B;
(2) mixing the modified inorganic mixed filler powder A prepared in the step (1) with an organic carrier mixed material B, quantitatively adding an impact modifier, an antioxidant and an ultraviolet-resistant absorbent, and carrying out high-stirring mixing for 20-60 min to obtain a mixed material C;
(3) and transferring the mixed material C into a double-screw device for melting, plasticizing, extruding and granulating to obtain the composite material.
A method for preparing a composite material, wherein in the step (1) 1-2: the oil absorption value of the modified filler powder A is lower than 35 ml BOP/100 g powder A.
Embodiment 2 a polypropylene-sludge composite material for producing a building template, which is prepared from the following raw materials in parts by weight:
35 parts of polypropylene;
40 parts of sludge of a sewage treatment plant, and the particle size is 1200 meshes;
10 parts of wood powder with the particle size of 100 meshes;
0.8 part of rutile titanium dioxide, and the grain size is 1250 meshes;
0.8 part of talcum powder with the grain size of 1250 meshes;
2 parts of epoxidized soybean oil;
0.05 part of nucleating agent;
0.1 part of impact modifier;
2 parts of chlorinated paraffin;
0.1 part of calcium stearate;
0.1 part of aluminate;
0.1 part of antioxidant;
0.1 part of anti-ultraviolet absorbent;
and 2 parts of paraffin.
A method of making a composite material, the method comprising the steps of:
(1) pretreatment of inorganic filler and organic carrier:
1-1, drying and deodorizing the sludge at 300-450 ℃, and removing water and organic matters after the drying treatment lasts for 2 hours; mechanically crushing the dried sludge;
1-2, performing high-stirring mixing and modification in the first stage: stirring and mixing the dried and crushed sludge fine powder, the talcum powder, the wood powder and the rutile type titanium dioxide at a high speed according to a set dosage ratio to uniformly mix all the materials; high stirring in the second stage: after the temperature of the grinding system reaches 100 ℃, high stirring is continued for 10-20 min, and the water in the mixed powder is fully removed; and (3) high stirring in the third stage: adding a certain amount of aluminate and stearic acid into the materials, and stirring for 10-15 min to obtain uniformly mixed modified filler powder A;
1-3, first stage: carrying out high-stirring preheating on polypropylene to remove adsorbed water on the surface; and a second stage: after the temperature of the grinding system reaches 100 ℃, continuously stirring the materials for 10-20 min; and a third stage: adding epoxidized soybean oil, a nucleating agent, chlorinated paraffin and paraffin according to a set dosage ratio, and stirring the mixed material for 10-30 min to obtain an organic carrier mixed material B;
(2) mixing the modified inorganic mixed filler powder A prepared in the step (1) with an organic carrier mixed material B, quantitatively adding an impact modifier, an antioxidant and an ultraviolet-resistant absorbent, and carrying out high-stirring mixing for 20-60 min to obtain a mixed material C;
(3) and transferring the mixed material C to double-screw-single-screw equipment for melting, mixing, extruding and granulating to obtain the polypropylene-sludge environment-friendly reinforced composite material.
The oil absorption value of the modified filler powder A is 32 ml BOP/100 g powder A.
Example 3 a polypropylene-sludge composite for the production of building forms, prepared with the following raw materials in parts by weight:
25 parts of polypropylene;
30 parts of sludge of a sewage treatment plant, and the particle size is 1500 meshes;
15 parts of wood powder with the particle size of 200 meshes;
0.5 part of rutile titanium dioxide, and the particle size is 1500 meshes;
1 part of talcum powder with the particle size of 1500 meshes;
5 parts of epoxidized soybean oil;
0.1 part of nucleating agent;
0.3 part of impact modifier;
5 parts of chlorinated paraffin;
0.5 part of sodium stearate;
0.5 part of aluminate;
0.1 part of antioxidant;
0.1 part of anti-ultraviolet absorbent;
5 parts of paraffin.
A method of making a composite material, the method comprising the steps of:
(1) pretreatment of inorganic filler and organic carrier:
1-1, drying and deodorizing the sludge at 300-450 ℃, and removing water and organic matters after the drying time is 2 hours; mechanically crushing the dried sludge;
1-2, performing high-stirring mixing and modification in the first stage: stirring and mixing the dried and crushed sludge fine powder, the talcum powder, the wood powder and the rutile type titanium dioxide at a high speed according to a set dosage ratio to uniformly mix all the materials; high stirring in the second stage: after the temperature of the grinding system reaches 100 ℃, high stirring is continued for 10-20 min, and the water in the mixed powder is fully removed; and (3) high stirring in the third stage: adding a certain amount of aluminate and stearic acid into the materials, and stirring for 10-15 min to obtain uniformly mixed modified filler powder A;
1-3, first stage: carrying out high-stirring preheating on polypropylene to remove adsorbed water on the surface; and a second stage: after the temperature of the grinding system reaches 100 ℃, continuously stirring the materials for 10-20 min; and a third stage: adding epoxidized soybean oil, a nucleating agent, chlorinated paraffin and paraffin according to a set dosage ratio, and stirring the mixed material for 10-30 min to obtain an organic carrier mixed material B;
(2) mixing the modified inorganic mixed filler powder A prepared in the step (1) with an organic carrier mixed material B, quantitatively adding an impact modifier, an antioxidant and an ultraviolet-resistant absorbent, and carrying out high-stirring mixing for 20-60 min to obtain a mixed material C;
(3) and transferring the mixed material C to double-screw-single-screw equipment for melting, mixing, extruding and granulating to obtain the polypropylene-sludge environment-friendly reinforced composite material.
The oil absorption value of the modified filler powder A is 30 ml BOP/100 g powder A.
Example 4, a polypropylene-sludge based composite material for the preparation of building templates, the composite material being prepared by optimizing the following raw materials in parts by weight:
20 parts of polypropylene;
45 parts of electroplating plant sludge with the particle size of 1200 meshes;
8 parts of wood powder with the particle size of 200 meshes;
1 part of rutile titanium dioxide, and the particle size is 1500 meshes;
1 part of talcum powder with the particle size of 1000 meshes;
4 parts of epoxidized soybean oil;
0.1 part of nucleating agent;
0.2 part of impact modifier;
4 parts of chlorinated paraffin;
0.5 part of zinc stearate;
0.5 part of aluminate;
0.1 part of antioxidant;
0.1 part of anti-ultraviolet absorbent;
5 parts of paraffin.
A method of making a composite material, the method comprising the steps of:
(1) pretreatment of inorganic filler and organic carrier:
1-1, drying and deodorizing the sludge at 300-450 ℃, and removing water and organic matters after the drying time is 2 hours; mechanically crushing the dried sludge;
1-2, performing high-stirring mixing and modification in the first stage: stirring and mixing the dried and crushed sludge fine powder, the talcum powder, the wood powder, the rutile type titanium dioxide and the shell powder at a high speed according to a set dosage ratio to uniformly mix the materials; high stirring in the second stage: after the temperature of the grinding system reaches 100 ℃, high stirring is continued for 10-20 min, and the water in the mixed powder is fully removed; and (3) high stirring in the third stage: adding a certain amount of aluminate and stearic acid into the materials, and stirring for 10-15 min to obtain uniformly mixed modified filler powder A;
1-3, first stage: carrying out high-stirring preheating on polypropylene to remove adsorbed water on the surface; and a second stage: after the temperature of the grinding system reaches 100 ℃, continuously stirring the materials for 10-20 min; and a third stage: adding epoxidized soybean oil, a nucleating agent, chlorinated paraffin and paraffin according to a set dosage ratio, and stirring the mixed material for 10-30 min to obtain an organic carrier mixed material B;
(2) mixing the modified inorganic mixed filler powder A prepared in the step (1) with an organic carrier mixed material B, quantitatively adding an impact modifier, an antioxidant and an ultraviolet-resistant absorbent, and carrying out high-stirring mixing for 20-60 min to obtain a mixed material C;
(3) and transferring the mixed material C to double-screw-single-screw equipment for melting, mixing, extruding and granulating to obtain the polypropylene-sludge environment-friendly reinforced composite material.
The oil absorption value of the modified filler powder A is 32 ml BOP/100 g powder A.
Example 5 a polypropylene-sludge composite for the production of building templates, prepared with the following raw materials in parts by weight:
30 parts of polypropylene;
55 parts of sludge of a sewage treatment plant, wherein the particle size is 1200 meshes;
25 parts of wood powder with the particle size of 80 meshes;
1 part of rutile titanium dioxide, and the particle size is 1000 meshes;
0.5 part of talcum powder with the grain size of 1500 meshes;
4 parts of epoxidized soybean oil;
0.06 part of nucleating agent;
0.3 part of impact modifier;
5 parts of chlorinated paraffin;
0.5 part of calcium stearate;
0.5 part of aluminate;
0.1 part of antioxidant;
0.1 part of anti-ultraviolet absorbent;
4 parts of paraffin.
A method of making a composite material, the method comprising the steps of:
(1) pretreatment of inorganic filler and organic carrier:
1-1, drying and deodorizing the sludge at 300-450 ℃, and removing water and organic matters after the drying time is 2 hours; mechanically crushing the dried sludge;
1-2, performing high-stirring mixing and modification in the first stage: stirring and mixing the dried and crushed sludge fine powder, the talcum powder, the wood powder and the rutile type titanium dioxide at a high speed according to a set dosage ratio to uniformly mix all the materials; high stirring in the second stage: after the temperature of the grinding system reaches 100 ℃, high stirring is continued for 10-20 min, and the water in the mixed powder is fully removed; and (3) high stirring in the third stage: adding a certain amount of aluminate and stearic acid into the materials, and stirring for 10-15 min to obtain uniformly mixed modified filler powder A;
1-3, first stage: carrying out high-stirring preheating on polypropylene to remove adsorbed water on the surface; and a second stage: after the temperature of the grinding system reaches 100 ℃, continuously stirring the materials for 10-20 min; and a third stage: adding epoxidized soybean oil, a nucleating agent, chlorinated paraffin and paraffin according to a set dosage ratio, and stirring the mixed material for 10-30 min to obtain an organic carrier mixed material B;
(2) mixing the modified inorganic mixed filler powder A prepared in the step (1) with an organic carrier mixed material B, quantitatively adding an impact modifier, an antioxidant and an ultraviolet-resistant absorbent, and carrying out high-stirring mixing for 20-60 min to obtain a mixed material C;
(3) and transferring the mixed material C to double-screw-single-screw equipment for melting, mixing, extruding and granulating to obtain the polypropylene-sludge environment-friendly reinforced composite material.
The oil absorption value of the modified filler powder A is 34 ml BOP/100 g powder A.
Example 6 a polypropylene-sludge composite for the production of building templates, prepared with the following raw materials in parts by weight:
35 parts of polypropylene;
45 parts of electroplating plant sludge with the particle size of 1200 meshes;
5 parts of wood powder with the particle size of 200 meshes;
0.5 part of rutile titanium dioxide, and the particle size is 1500 meshes;
0.5 part of talcum powder with the grain size of 1500 meshes;
5 parts of epoxidized soybean oil;
0.2 part of nucleating agent;
0.1 part of impact modifier;
5 parts of chlorinated paraffin;
0.5 part of sodium stearate;
0.5 part of aluminate;
0.1 part of antioxidant;
0.1 part of anti-ultraviolet absorbent;
5 parts of paraffin.
A method of making a composite material, the method comprising the steps of:
(1) pretreatment of inorganic filler and organic carrier:
1-1, drying and deodorizing the sludge at 300-450 ℃, and removing water and organic matters after the drying time is 2 hours; mechanically crushing the dried sludge;
1-2, performing high-stirring mixing and modification in the first stage: stirring and mixing the dried and crushed sludge fine powder, the talcum powder, the wood powder and the rutile type titanium dioxide at a high speed according to a set dosage ratio to uniformly mix all the materials; high stirring in the second stage: after the temperature of the grinding system reaches 100 ℃, high stirring is continued for 10-20 min, and the water in the mixed powder is fully removed; and (3) high stirring in the third stage: adding a certain amount of aluminate and stearic acid into the materials, and stirring for 10-15 min to obtain uniformly mixed modified filler powder A;
1-3, first stage: carrying out high-stirring preheating on polypropylene to remove adsorbed water on the surface; and a second stage: after the temperature of the grinding system reaches 100 ℃, continuously stirring the materials for 10-20 min; and a third stage: adding epoxidized soybean oil, a nucleating agent, chlorinated paraffin and paraffin according to a set dosage ratio, and stirring the mixed material for 10-30 min to obtain an organic carrier mixed material B;
(2) mixing the modified inorganic mixed filler powder A prepared in the step (1) with an organic carrier mixed material B, quantitatively adding an impact modifier, an antioxidant and an ultraviolet-resistant absorbent, and carrying out high-stirring mixing for 20-60 min to obtain a mixed material C;
(3) and transferring the mixed material C to double-screw-single-screw equipment for melting, mixing, extruding and granulating to obtain the polypropylene-sludge environment-friendly reinforced composite material.
The oil absorption value of the modified filler powder A is 28 ml BOP/100 g powder A.
TABLE 1 Components and proportions of high Strength sheets prepared in examples 2-6
Example 2 Example 3 Example 4 Example 5 Example 6
Polypropylene 35 25 20 30 35
Sludge treatment 40 30 45 55 45
Wood flour 5 15 8 25 5
Rutile titanium dioxide 0.6 0.5 1 1 0.5
Talcum powder 0.5 1 1 0.5 0.5
Epoxidized soybean oil 2 5 4 4 5
Nucleating agent 0.05 0.1 0.1 0.06 0.2
Impact modifier 0.1 0.3 0.2 0.3 0.1
Chlorinated paraffin 2 5 4 5 5
Dispersing agent 0.1 0.5 0.5 0.5 0.5
Aluminate ester 0.1 0.5 0.5 0.5 0.5
Antioxidant agent 0.1 0.1 0.1 0.1 0.1
Ultraviolet-resistant absorberCollecting agent 0.1 0.1 0.1 0.1 0.1
Paraffin wax 2 5 5 4 5
Tensile properties test experiment:
and (3) performing hot press molding on the composite material prepared in the embodiment by a tablet press, preparing a standard detection sample strip according to a national standard GB/T1040-2006 plastic tensile test, and detecting the mechanical property of the sample strip. Meanwhile, the same standard test sample strip is prepared from the commercially available polypropylene sheet material, and the mechanical properties of the sample strip are tested. The test results are shown in table 2.
TABLE 2 results of the assay of examples 2-6 and comparative samples
Sample name Tensile Strength (MPa) Elongation at Break (%) Modulus of elasticity (MPa)
Comparative example 28.20 3.90 3300
Example 2 35.22 4.35 3437
Example 3 29.53 4.11 3651
Example 4 30.41 4.20 3629
Example 5 30.09 4.37 3880
Example 6 35.80 4.42 3644
As can be seen from the tensile property test results of the samples of the examples and the comparative examples in Table 2, the tensile properties of the examples are obviously superior to those of the comparative examples. The excellent mechanical property and the recycling performance of the composite raw material particles for preparing the sludge-based polypropylene building template are realized by the following technical scheme:
compared with a single polypropylene raw material or a traditional wood-plastic or plastic building template taking the wood powder as a main filler, the composite reinforcing material has the characteristics of obviously enhancing the mechanical mechanics of a terminal product and prolonging the service cycle of the terminal product.
Heavy metal leaching detection experiment:
in the above embodiment, the leaching test of heavy metals shows that lead (Pb) is less than 0.5 mg/L, chromium (Cr) is less than 0.2 mg/L, copper (Cu) is less than 0.4 mg/L, and cadmium (Cd) is less than 0.1 mg/L. Therefore, the leaching amount of the heavy metal in the invention is obviously lower than the national limit standard of the corresponding element.
The invention takes sludge generated by urban sewage treatment plants as a main filler, takes polypropylene as an organic carrier, and realizes the compounding of modified sludge powder and the organic carrier polypropylene through a high-stirring-double-screw plasticizing-single-screw extrusion granulation combined technology, so that a filler system, an inorganic filler, the organic carrier and the like are more uniformly and fully bonded.
According to the invention, from the viewpoints of resource utilization of sludge, environmental protection and economical and economic utilization of organic polymers, sludge is innovatively used as a main inorganic raw material, a one-dimensional tubular or fibrous composite filler is used for reinforcing the sludge, polypropylene is used as an organic carrier, granulation is performed through a high-efficiency high-stirring-double-screw plasticizing-single-screw extrusion combined process, composite raw material particles are applied to preparation of related building templates, and the mechanical, aging-resistant, thermal and other performance requirements of the terminal building templates on the products are met.
Although the present invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and various changes in form and details may be made within the scope of the appended claims.

Claims (9)

1. A polypropylene (PP) -sludge composite material for producing building templates is characterized in that: the feed is prepared from the following raw materials in parts by weight:
15-35 parts of polypropylene;
40-65 parts of sludge;
5-25 parts of wood powder;
0.5-1 part of rutile titanium dioxide;
0.5-1 part of talcum powder;
1-5 parts of epoxidized soybean oil;
0.05 to 0.2 portion of nucleating agent;
0.1-0.5 part of impact modifier;
1-5 parts of chlorinated paraffin;
0.1-0.5 part of dispersant;
0.1 to 0.5 portion of aluminate ester;
0.1 to 0.3 portion of antioxidant;
0.1-0.5 part of anti-ultraviolet absorbent;
1-5 parts of paraffin.
2. The polypropylene-sludge composite material for producing building templates as claimed in claim 1, wherein: the following raw materials in parts by weight are preferred:
15-25 parts of polypropylene;
40-50 parts of sludge;
10-15 parts of wood powder;
0.5-1 part of rutile titanium dioxide;
0.5-1 part of talcum powder;
3-5 parts of epoxidized soybean oil;
0.08 to 0.1 portion of nucleating agent;
0.1-0.2 part of impact modifier;
3-5 parts of chlorinated paraffin;
0.3-0.5 part of dispersant;
0.3 to 0.5 portion of aluminate ester;
0.1-0.2 part of antioxidant;
0.1-0.2 part of anti-ultraviolet absorbent;
3-5 parts of paraffin.
3. The polypropylene-sludge composite material for producing building templates as claimed in claim 1, wherein: the sludge in the raw materials is sludge of a municipal sewage treatment plant, and the particle size range of the sludge is as follows: the particle size range is 1200-1500 meshes.
4. The polypropylene-sludge composite material for producing building templates as claimed in claim 1, wherein: the dispersant in the raw materials is stearate, including but not limited to sodium stearate, calcium stearate and zinc stearate.
5. The polypropylene-sludge composite material for producing building templates as claimed in claim 1, wherein: the particle size range of the rutile titanium dioxide and the talcum powder in the raw materials is 1000-1500 meshes.
6. The polypropylene-sludge composite material for producing building templates as claimed in claim 1, wherein: the grain size range of the wood powder in the raw material is80-400 meshes.
7. A method of preparing a composite material as claimed in claim 1, comprising the steps of:
(1) pretreatment of inorganic filler and organic carrier:
1-1, drying and deodorizing the sludge at 300-450 ℃, and removing water and organic matters after the drying treatment lasts for 2 hours; mechanically crushing the dried sludge;
1-2, performing high-stirring mixing and modification in the first stage: stirring and mixing the dried and crushed sludge fine powder, the talcum powder, the wood powder and the rutile type titanium dioxide at a high speed according to a set dosage ratio to uniformly mix all the materials; high stirring in the second stage: after the temperature of the grinding system reaches 100 ℃, high stirring is continued for 10-20 min, and the water in the mixed powder is fully removed; and (3) high stirring in the third stage: adding a certain amount of aluminate and stearic acid into the materials, and stirring for 10-15 min to obtain uniformly mixed modified filler powder A;
1-3, first stage: carrying out high-stirring preheating on polypropylene to remove adsorbed water on the surface; and a second stage: after the temperature of the grinding system reaches 100 ℃, continuously stirring the materials for 10-20 min; and a third stage: adding epoxidized soybean oil, a nucleating agent, chlorinated paraffin and paraffin according to a set dosage ratio, and stirring the mixed material for 10-30 min to obtain an organic carrier mixed material B;
(2) mixing the modified inorganic mixed filler powder A prepared in the step (1) with an organic carrier mixed material B, quantitatively adding an impact modifier, an antioxidant and an ultraviolet-resistant absorbent, and carrying out high-stirring mixing for 20-60 min to obtain a mixed material C;
(3) and transferring the mixed material C into a double-screw device for melting, plasticizing, extruding and granulating to obtain the composite material.
8. A method of making a composite material according to claim 7, wherein:
in the step (1) 1-1: the grain size of the crushed sludge is 1200-1500 meshes.
9. A method of making a composite material according to claim 7, wherein:
in the step (1) 1-2: the oil absorption value of the modified filler powder A is lower than 35 ml BOP/100 g powder A.
CN201910963049.XA 2019-10-11 2019-10-11 Polypropylene-sludge composite material for producing building template and method thereof Pending CN110643114A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104893339A (en) * 2015-06-12 2015-09-09 汪新民 Wood-plastic composite and preparation method thereof
CN108440832A (en) * 2018-02-05 2018-08-24 青岛国恩科技股份有限公司 A kind of automotive trim PP composite material and preparation method thereof
CN109912905A (en) * 2019-03-26 2019-06-21 浙江工业大学温州科学技术研究院 A kind of compound material particle preparing sludge capital construction building mould and its method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104893339A (en) * 2015-06-12 2015-09-09 汪新民 Wood-plastic composite and preparation method thereof
CN108440832A (en) * 2018-02-05 2018-08-24 青岛国恩科技股份有限公司 A kind of automotive trim PP composite material and preparation method thereof
CN109912905A (en) * 2019-03-26 2019-06-21 浙江工业大学温州科学技术研究院 A kind of compound material particle preparing sludge capital construction building mould and its method

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Application publication date: 20200103