CN114381066A - Super-hydrophilic polypropylene composite material and preparation method thereof - Google Patents
Super-hydrophilic polypropylene composite material and preparation method thereof Download PDFInfo
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 128
- -1 polypropylene Polymers 0.000 title claims abstract description 121
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 115
- 239000002131 composite material Substances 0.000 title claims abstract description 79
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims abstract description 43
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 43
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 43
- 229920002261 Corn starch Polymers 0.000 claims abstract description 37
- 239000008120 corn starch Substances 0.000 claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 33
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims abstract description 26
- 229920001971 elastomer Polymers 0.000 claims abstract description 25
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 10
- 229930195729 fatty acid Natural products 0.000 claims description 10
- 239000000194 fatty acid Substances 0.000 claims description 10
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 9
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 7
- 229920000570 polyether Polymers 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- WLXGQMVCYPUOLM-UHFFFAOYSA-N 1-hydroxyethanesulfonic acid Chemical compound CC(O)S(O)(=O)=O WLXGQMVCYPUOLM-UHFFFAOYSA-N 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 4
- 125000005313 fatty acid group Chemical group 0.000 claims description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 239000011347 resin Substances 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 18
- 238000010521 absorption reaction Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 10
- 238000001514 detection method Methods 0.000 description 5
- 230000002195 synergetic effect Effects 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002715 modification method Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a super-hydrophilic polypropylene composite material and a preparation method thereof, and relates to the technical field of polymer composite materials. The super-hydrophilic polypropylene composite material comprises, by mass, 24-60% of polypropylene, 10-20% of thermoplastic polyurethane rubber, 10-15% of corn starch, 10-15% of aluminum hydroxide, 5-10% of maleic anhydride grafted polypropylene, 3-10% of a hydrophilic agent and 1-3% of a dispersing agent. The super-hydrophilic polypropylene composite material can greatly reduce the water contact angle of the super-hydrophilic polypropylene composite material, thereby effectively improving the hydrophilic performance of the super-hydrophilic polypropylene composite material and solving the problem of poor hydrophilic performance of the existing polypropylene resin.
Description
Technical Field
The invention relates to the technical field of polymer composite materials, in particular to a super-hydrophilic polypropylene composite material and a preparation method thereof.
Background
Polypropylene is called PP for short, is a general plastic with excellent performance and wide application, and has wide application in the industries of packaging, electrical appliances, chemical industry, household appliances and the like, and various products such as films, fibers, non-manufactured cloth, sheets and the like which take polypropylene as a raw material are widely applied in life and industrial production, but the application of polypropylene materials in the industrial fields of textile, building and the like is limited to a great extent due to weak polarity, low surface energy and poor hydrophilic capability of polypropylene. If the hydrophilic performance of the polypropylene is improved, the dyeing performance of the polypropylene can be enhanced in the textile field, and the comfort of clothes and accessories is enhanced; in the industrial field, the bonding force between the concrete and the concrete can be enhanced to improve the comprehensive mechanical property of the concrete. Therefore, the method has very important and profound significance for improving the hydrophilic performance of the polypropylene.
The contact angle between polypropylene resin and water is generally 100-110 degrees, the polypropylene resin belongs to a hydrophobic material, the conventional polypropylene hydrophilic modification methods generally comprise methods such as blending, plasma surface treatment, plasma polymerization, radiation crosslinking, surface grafting and the like, but all have various defects, and the hydrophilic performance of the polypropylene is difficult to greatly improve.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a super-hydrophilic polypropylene composite material which can greatly reduce the water contact angle of the super-hydrophilic polypropylene composite material, thereby effectively improving the hydrophilic performance of the super-hydrophilic polypropylene composite material and solving the problem of poor hydrophilic ability of the existing polypropylene resin.
The invention also aims to provide a preparation method of the super-hydrophilic polypropylene composite material, which is simple and easy to realize industrial production.
In order to achieve the purpose, the invention adopts the following technical scheme:
the super-hydrophilic polypropylene composite material comprises, by mass, 24-60% of polypropylene, 10-20% of thermoplastic polyurethane rubber, 10-15% of corn starch, 10-15% of aluminum hydroxide, 5-10% of maleic anhydride grafted polypropylene, 3-10% of a hydrophilic agent, 1-3% of one or more of an antioxidant 1010, an antioxidant 168, PE wax, PP wax and erucamide.
Further, the hydrophilic agent is fatty acid hydroxyethane sulfonate.
Further, the dispersant is any one or combination of more of PE wax, erucamide, PP wax and stearic acid.
Further, the melt flow rate of the polypropylene is 20-30 g/10 min.
Further, the particle size of the aluminum hydroxide is 2000-5000 meshes.
Further, the grafting rate of the maleic anhydride grafted polypropylene is 0.8-2.0%.
Further, the thermoplastic polyurethane rubber is a polyether type thermoplastic polyurethane rubber classified by molecular structure.
Further, the super-hydrophilic polypropylene composite material also comprises 1-3% of other auxiliary agents in percentage by mass.
The preparation method of the super-hydrophilic polypropylene composite material is used for preparing the super-hydrophilic polypropylene composite material, and the super-hydrophilic polypropylene composite material is obtained by uniformly mixing the raw materials according to a formula and then extruding and granulating at the temperature of 180-230 ℃.
The invention has the beneficial effects that: according to the super-hydrophilic polypropylene composite material, the hydrophilic agent, the aluminum hydroxide, the corn starch, the maleic anhydride grafted polypropylene and the thermoplastic polyurethane rubber are added into the polypropylene, and the components have synergistic effect, so that the surface energy of the material is improved together, the polarity of the material is improved, and the hydrophilic performance of the polypropylene composite material is greatly improved. The surfaces of the hydrophilic agent, the aluminum hydroxide and the corn starch have hydroxyl groups with strong water absorption capacity, the hydrophilic agent, the aluminum hydroxide and the corn starch are good in compatibility and can play a complementary role by adding, thermoplastic polyurethane rubber (TPU for short) is good in compatibility with polypropylene, and meanwhile, the surface of the TPU has the hydroxyl groups with strong hygroscopicity, so that the hydrophilic agent, the aluminum hydroxide, the corn starch and the polypropylene have good water absorption performance, and can play a bridge role, so that the hydrophilic agent, the aluminum hydroxide, the corn starch and the polypropylene can be firmly bound together, and the water property of the super-hydrophilic polypropylene composite material is improved; meanwhile, the addition of the maleic anhydride grafted polypropylene (PP-g-MAH for short) can effectively improve the compatibility of each component, so that the hygroscopicity of the maleic anhydride grafted polypropylene can be more long-term and effective.
Detailed Description
The technical solution of the present invention will be further described with reference to the following embodiments.
The super-hydrophilic polypropylene composite material comprises, by mass, 24-60% of polypropylene, 10-20% of thermoplastic polyurethane rubber, 10-15% of corn starch, 10-15% of aluminum hydroxide, 5-10% of maleic anhydride grafted polypropylene, 3-10% of a hydrophilic agent, 1-3% of one or more of an antioxidant 1010, an antioxidant 168, PE wax, PP wax and erucamide.
Because polypropylene has weak polarity and poor hydrophilic capability, the application of polypropylene materials in the industrial fields of textile, building and the like is limited to a great extent, and the hydrophilic performance of polypropylene is difficult to greatly improve by the current polypropylene hydrophilic modification method.
In order to solve the problems, the technical scheme provides the super-hydrophilic polypropylene composite material, and the hydrophilic agent, the aluminum hydroxide, the corn starch, the maleic anhydride grafted polypropylene and the thermoplastic polyurethane rubber are added into the polypropylene, so that the surface energy of the material is jointly improved and the polarity of the material is improved under the synergistic action of the components, and the hydrophilic performance of the polypropylene composite material is greatly improved. The surfaces of the hydrophilic agent, the aluminum hydroxide and the corn starch have hydroxyl groups with strong water absorption capacity, the hydrophilic agent, the aluminum hydroxide and the corn starch are good in compatibility and can play a complementary role by adding, thermoplastic polyurethane rubber (TPU for short) is good in compatibility with polypropylene, and meanwhile, the surface of the TPU has the hydroxyl groups with strong hygroscopicity, so that the hydrophilic agent, the aluminum hydroxide, the corn starch and the polypropylene have good water absorption performance, and can play a bridge role, so that the hydrophilic agent, the aluminum hydroxide, the corn starch and the polypropylene can be firmly bound together, and the water property of the super-hydrophilic polypropylene composite material is improved; meanwhile, the addition of the maleic anhydride grafted polypropylene (PP-g-MAH for short) can effectively improve the compatibility of each component, so that the hygroscopicity of the maleic anhydride grafted polypropylene can be more long-term and effective.
Specifically, 10-20% of thermoplastic polyurethane rubber (TPU) is added in the technical scheme, wherein the TPU is thermoplastic polyurethane rubber formed by mutually combining a hard polyurethane segment reacted with isocyanate and a soft polyester or polyether segment in a blocking manner. The monomer of the TPU contains polyalcohol which has strong hydrophilicity, and the molecular structure of the TPU contains a plurality of hydrophilic groups, so that the TPU has strong hydrophilicity, and in addition, the TPU contains a rubber section which can have good compatibility with polypropylene. Therefore, the super-hydrophilic polypropylene composite material with the technical scheme is added with the TPU, so that the hydrophilic performance of the material can be well improved, and the toughness and the ductility of the material can be increased.
According to the technical scheme, 10-15% of corn starch is added into the super-hydrophilic polypropylene composite material, and the corn starch contains a large amount of hydroxyl, so that the corn starch has very strong hydrophilic performance, the surface energy of the material can be greatly reduced, the hydrophilicity of the material is improved, and in addition, the corn starch belongs to a degradable material and can play a good role in protecting the environment. According to the technical scheme, 10% -15% of aluminum hydroxide is added to the super-hydrophilic polypropylene composite material, the aluminum hydroxide is an inorganic substance and has a chemical formula of Al (OH)3, the surfaces of the aluminum hydroxide are all hydroxyl groups, so that the surface activity is very strong, the surface energy of the super-hydrophilic polypropylene composite material can be well reduced, the hydrophilicity of the super-hydrophilic polypropylene composite material is increased, and in addition, the shrinkage rate of the material can be well reduced and the rigidity and the strength of the material are increased by taking the aluminum hydroxide and the corn starch as filling materials.
According to the technical scheme, 5% -15% of maleic anhydride grafted polypropylene (PP-g-MAH) is added into the super-hydrophilic polypropylene composite material, one end of the PP-g-MAH is a PP group which can be completely compatible with polypropylene, and the other end of the PP-g-MAH is maleic anhydride with extremely high activity, so that the hydrophilicity of the super-hydrophilic polypropylene composite material can be increased, and the maleic anhydride can be well fused with hydroxyl groups in corn starch, aluminum hydroxide, TPU and a hydrophilic agent, so that a good bridge effect is achieved among the corn starch, the aluminum hydroxide, the TPU, the hydrophilic agent and the polypropylene, all the components can be tightly bound together, the compatibility among the components is greatly improved, the overall performance of the super-hydrophilic polypropylene composite material is improved, and the long-acting property of water absorption of the super-hydrophilic polypropylene composite material is guaranteed.
The super-hydrophilic polypropylene composite material of the technical scheme is also added with 1-3% of one or more of antioxidants 1010 and 168, PE wax, PP wax and erucamide, so that the corn starch and aluminum hydroxide can be effectively prevented from agglomerating, and the mechanical property of the super-hydrophilic polypropylene composite material is improved.
It is worth explaining that, in the formula range of the technical scheme, the hydrophilic performance of the super-hydrophilic polypropylene composite material is obviously increased along with the increase of the contents of the hydrophilic agent, the maleic anhydride grafted polypropylene, the TPU, the corn starch and the aluminum hydroxide, the surfaces of the hydrophilic agent, the aluminum hydroxide and the corn starch all have hydroxyl groups with strong water absorption capacity, the hydrophilic agent, the aluminum hydroxide and the corn starch have good compatibility, and the hydrophilic agent, the aluminum hydroxide and the corn starch can play a role of a bridge among the hydrophilic agent, the aluminum hydroxide, the corn starch and the polypropylene by being added together to play a complementary role, the TPU has good compatibility with the PP, and the surface has hydroxyl groups with strong moisture absorption capacity, so that the TPU, the aluminum hydroxide, the corn starch and the polypropylene can be firmly bound together to improve the water absorption of the material, the compatibility of each component can be improved by adding the PP-g-MAH, the moisture absorption of the material can be more effective for a long time, and the synergistic addition effect exists among the components, the water contact angle of the super-hydrophilic polypropylene composite material can be greatly reduced, so that the hydrophilic performance of the super-hydrophilic polypropylene composite material is greatly improved.
Preferably, the corn starch in the technical scheme is of industrial grade, is not subjected to surface treatment, and has the advantage of good hygroscopicity.
Further illustratively, the hydrophilizing agent is a fatty acid hydroxyethane sulfonate.
It is worth to be demonstrated that the technical scheme adopts fatty acid hydroxyethane sulfonate as a hydrophilic agent, the fatty acid hydroxyethane sulfonate belongs to a surfactant, and the surface tension of the liquid can be remarkably reduced by adding the fatty acid hydroxyethane sulfonate into the super-hydrophilic polypropylene composite material. The molecular structure of the fatty acid hydroxyethane sulfonate consists of two parts, one end of the molecule is a nonpolar group, so that the fatty acid hydroxyethane sulfonate can have good compatibility with nonpolar polypropylene, the other end of the molecule is a polar hydrophilic group, so that the hydrophilic performance is very excellent, and the fatty acid hydroxyethane sulfonate is a mild anionic surfactant, has low water interfacial tension, good dispersing and solubilizing capabilities and excellent penetrating and wetting dispersing performances, and can greatly improve the hydrophilic performance of the super-hydrophilic polypropylene composite material.
Further illustratively, the dispersant is any one or a combination of more of PE wax, erucamide, PP wax, and stearic acid.
It is worth explaining that the dispersant in the technical scheme selects any one or a combination of more of PE wax, erucamide, PP wax and stearic acid, the dispersant has a good dispersing effect, inorganic fillers such as aluminum hydroxide and corn starch can be uniformly dispersed in the composite material, the water absorption performance of the super-hydrophilic polypropylene composite material can be obviously improved, and on the other hand, the dispersant has good compatibility with polypropylene and thermoplastic polyurethane rubber, and the long-term water absorption performance of the super-hydrophilic polypropylene composite material can be improved.
Further, the melt flow rate of the polypropylene is 20-30 g/10 min.
Specifically, the technical scheme selects the polypropylene with the melt flow rate of 20-30 g/10min, so that the dispersion is facilitated, and if the melt flow rate of the polypropylene is less than 20g/10min, the dispersion speed of the polypropylene is lower.
Further, the particle size of the aluminum hydroxide is 2000 to 5000 mesh.
It is worth to be noted that the particle size of the aluminum hydroxide in the technical scheme is 2000 meshes to 5000 meshes. The particle size is too small to be easy to agglomerate, and too large particle size has poor mechanical property, so that the particle size is changed into 2000-5000 meshes. If the mesh number of the aluminum hydroxide is less than 2000 meshes, the mechanical property of the composite material is greatly reduced, and the product is easy to crack; if the mesh number of the aluminum hydroxide is larger than 5000 meshes, the aluminum hydroxide particles are too fine and are easy to agglomerate.
Further, the grafting ratio of the maleic anhydride grafted polypropylene is 0.8-2.0%.
It is worth to say that the grafting rate of the maleic anhydride grafted polypropylene is 0.8-2.0%, and the effect is the best. When the maleic anhydride grafted polypropylene has more grafted maleic anhydride, the PP content in the maleic anhydride grafted polypropylene is lower, the binding effect of the maleic anhydride grafted polypropylene is influenced, and the performances are reduced; if the grafting rate of the maleic anhydride grafted polypropylene is less than 0.8%, the grafting rate is lower, so that the maleic anhydride grafted polypropylene has lower activity and poorer hydrophilicity.
Further, the thermoplastic polyurethane rubber is a polyether type thermoplastic polyurethane rubber classified by molecular structure.
Specifically, the thermoplastic polyurethane rubber in the technical scheme is polyether type thermoplastic polyurethane rubber, has the advantages of high moisture absorption speed and high water content, and compared with polyester type thermoplastic polyurethane rubber, the polyether type thermoplastic polyurethane rubber has better hydrolysis resistance, low temperature resistance and bending resistance, and can more effectively improve the hydrophilicity of the super-hydrophilic polypropylene composite material.
Further, the super-hydrophilic polypropylene composite material also comprises 1-3% of other auxiliary agents by mass percent.
The preparation method of the super-hydrophilic polypropylene composite material is used for preparing the super-hydrophilic polypropylene composite material, and the super-hydrophilic polypropylene composite material is obtained by uniformly mixing the raw materials according to a formula and then extruding and granulating at the temperature of 180-230 ℃.
Specifically, the preparation method of the super-hydrophilic polypropylene composite material comprises the following steps: the raw materials are uniformly mixed according to a formula, added into a double-screw extruder from a first section of a cylinder feeding section of the double-screw extruder, and extruded and granulated at a rotating speed of 180-500 rpm and a temperature of 180-230 ℃ to obtain the super-hydrophilic polypropylene composite material, wherein the length-diameter ratio of the double-screw extruder is 32-68.
The technical scheme of the invention is further illustrated by combining specific examples and comparative examples.
Examples 1 to 5
The super-hydrophilic polypropylene composite material comprises, by mass, 24-60% of polypropylene, 10-20% of thermoplastic polyurethane rubber, 10-15% of corn starch, 10-15% of aluminum hydroxide, 5-10% of maleic anhydride grafted polypropylene, 3-10% of a hydrophilic agent, 1-3% of a dispersing agent and 1-3% of other additives. Wherein the hydrophilic agent is fatty acid hydroxyethane sulfonate; the dispersant consists of erucamide and PP wax; the melt flow rate of the polypropylene is 25g/10 min; the grain size of the aluminum hydroxide is 4000 meshes; the thermoplastic polyurethane rubber is polyether type thermoplastic polyurethane rubber; the grafting ratio of the maleic anhydride grafted polypropylene was 0.8%.
The preparation method of the super-hydrophilic polypropylene composite material comprises the following steps of uniformly mixing the raw materials according to the formula shown in the following table 1, adding the raw materials into a double-screw extruder from a first section cylinder feeding section of the double-screw extruder, and extruding and granulating at the rotating speed of 300 revolutions per minute and the temperature of 205 ℃ to obtain the super-hydrophilic polypropylene composite material, wherein the length-diameter ratio of the double-screw extruder is 48.
Comparative examples 1 to 3
Specifically, the preparation methods of the superhydrophilic polypropylene composite materials of comparative examples 1-3 are basically the same as those of example 1, and the difference is that the formulation ratios of the superhydrophilic polypropylene composite materials are different.
Specifically, the formulations of the superhydrophilic polypropylene composites of examples 1-5 and comparative examples 1-3 are shown in table 1 below.
TABLE 1 formulations of examples 1-5 and comparative examples 1-3
Specifically, the super-hydrophilic polypropylene composites prepared in examples 1 to 5 and comparative examples 1 to 3 were tested for tensile strength, elongation at break, flexural strength, flexural modulus, notched impact strength, melt index, water contact angle and density according to the test methods of table 2 below, and the test results are shown in table 2 below.
TABLE 2 test results of examples 1 to 5 and comparative examples 1 to 3
The detection results in table 2 show that the hydrophilic performance of the super-hydrophilic polypropylene composite material is obviously increased along with the increase of the contents of the hydrophilic agent, the maleic anhydride grafted polypropylene, the TPU, the corn starch and the aluminum hydroxide, and the surfaces of the hydrophilic agent, the aluminum hydroxide and the corn starch have hydroxyl groups with strong water absorption capacity, so that the hydrophilic agent, the aluminum hydroxide and the corn starch have good compatibility, and the hydrophilic agent, the aluminum hydroxide and the corn starch have a synergistic addition effect, so that the water contact angle of the composite material can be greatly reduced; from the detection result of the example 2, it can be seen that the mechanical property of the composite material is not greatly influenced with the decrease of the content of the hydrophilic agent, but the water contact angle is obviously increased; from the test results of example 3, it is seen that as the TPU decreases, the toughness and ductility of the composite material significantly decrease, but the strength increases and the water contact angle also significantly increases; the detection result of the embodiment 4 shows that as the addition amount of the maleic anhydride grafted polypropylene is reduced, the mechanical properties of the composite material are reduced, and the water contact angle is increased, so that the maleic anhydride grafted polypropylene can play a good compatible role in the components of the material; from the detection results of example 5, it is known that as the content of corn starch and aluminum hydroxide is reduced, the strength of the composite material is obviously reduced, the toughness is improved to some extent, and the water contact angle is also obviously improved; from the test results of comparative example 1, it is understood that the contact angle is very large, 108.1 ° although the strength is high, when polypropylene alone is used; according to the detection results of the embodiment 1 and the comparative example 2, with the increase of the dispersing agent, various properties of the composite material are obviously increased, so that the dispersing agent can effectively avoid the agglomeration of corn starch and aluminum hydroxide, and effectively improve the comprehensive properties of the composite material; from the test results of comparative example 3, it is understood that the effect of improving the hydrophilic property of polypropylene is not significant when only the hydrophilic agent and the TPU are added to the polypropylene.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. The super-hydrophilic polypropylene composite material is characterized by comprising, by mass, 24% -60% of polypropylene, 10% -20% of thermoplastic polyurethane rubber, 10% -15% of corn starch, 10% -15% of aluminum hydroxide, 5% -10% of maleic anhydride grafted polypropylene, 3% -10% of a hydrophilic agent and 1% -3% of a dispersing agent.
2. The superhydrophilic polypropylene composite of claim 1, wherein the hydrophilic agent is a fatty acid hydroxyethane sulfonate.
3. The superhydrophilic polypropylene composite of claim 1, wherein the dispersant is any one or a combination of PE wax, erucamide, PP wax, and stearic acid.
4. The superhydrophilic polypropylene composite of claim 1, wherein the polypropylene has a melt flow rate of 20-30 g/10 min.
5. The superhydrophilic polypropylene composite of claim 1, wherein the particle size of the aluminum hydroxide is 2000-5000 mesh.
6. The superhydrophilic polypropylene composite of claim 1, wherein the maleic anhydride grafted polypropylene has a grafting ratio of 0.8% to 2.0%.
7. The superhydrophilic polypropylene composite of claim 1, wherein the thermoplastic polyurethane rubber is a polyether type thermoplastic polyurethane rubber classified by molecular structure.
8. The superhydrophilic polypropylene composite of claim 1, further comprising 1-3% by mass of one or more of antioxidants 1010 and 168, PE wax, PP wax, erucamide.
9. A preparation method of a super-hydrophilic polypropylene composite material is characterized by being used for preparing the super-hydrophilic polypropylene composite material according to any one of claims 1 to 8, uniformly mixing the raw materials according to a formula, and then extruding and granulating at the temperature of 180-230 ℃ to obtain the super-hydrophilic polypropylene composite material.
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