CN115109342A - Polypropylene plastic and preparation method thereof - Google Patents
Polypropylene plastic and preparation method thereof Download PDFInfo
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- CN115109342A CN115109342A CN202210819726.2A CN202210819726A CN115109342A CN 115109342 A CN115109342 A CN 115109342A CN 202210819726 A CN202210819726 A CN 202210819726A CN 115109342 A CN115109342 A CN 115109342A
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- Prior art keywords
- polypropylene plastic
- parts
- polypropylene
- diatomite
- pdms
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- -1 Polypropylene Polymers 0.000 title claims abstract description 88
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 82
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 82
- 239000004033 plastic Substances 0.000 title claims abstract description 63
- 229920003023 plastic Polymers 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 41
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 41
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 24
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 18
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 229910052723 transition metal Inorganic materials 0.000 claims description 17
- 150000003624 transition metals Chemical class 0.000 claims description 17
- 239000005909 Kieselgur Substances 0.000 claims description 14
- 239000004599 antimicrobial Substances 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 11
- 239000004332 silver Substances 0.000 claims description 11
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- 239000011701 zinc Substances 0.000 claims description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000011737 fluorine Substances 0.000 claims description 8
- 229910052731 fluorine Inorganic materials 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- 229910021536 Zeolite Inorganic materials 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 239000002808 molecular sieve Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 239000010457 zeolite Substances 0.000 claims description 5
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 4
- 125000000524 functional group Chemical group 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims 4
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000004048 modification Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 10
- 239000000443 aerosol Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 230000000845 anti-microbial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002538 fungal effect Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 241000228245 Aspergillus niger Species 0.000 description 1
- 241000079253 Byssochlamys spectabilis Species 0.000 description 1
- 241000222122 Candida albicans Species 0.000 description 1
- 241001515917 Chaetomium globosum Species 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 241001136494 Talaromyces funiculosus Species 0.000 description 1
- 241000223261 Trichoderma viride Species 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000000843 anti-fungal effect Effects 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 229940095731 candida albicans Drugs 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/12—Adsorbed ingredients, e.g. ingredients on carriers
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/085—Copper
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
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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 relates to polypropylene plastic and a preparation method thereof. The polypropylene plastic comprises the following components in parts by weight: 85 to 94 parts of polypropylene resin, 1 to 5 parts of antibacterial agent and 5 to 10 parts of PDMS surface modified diatomite. The polypropylene plastic is added with the antibacterial agent, and the diatomite with the surface modified by Polydimethylsiloxane (PDMS) is blended and modified, so that the surface tension of the polypropylene plastic can be reduced, and the modified polypropylene plastic has excellent antibacterial and mildewproof effects.
Description
Technical Field
The invention relates to the field of polypropylene composite materials, in particular to polypropylene plastic and a preparation method thereof.
Background
Polypropylene is one of the most important general engineering plastics, and is widely applied to industries such as automobiles, household electrical appliances, kitchens and bathrooms, clothes, medical appliances, fiber products and the like due to the advantages of good mechanical property, excellent chemical corrosion resistance, low price and the like. However, after long-term use, harmful microorganisms such as bacteria and mold are easy to grow on the surface of the polypropylene plastic, so that safety and sanitation problems can be caused in the use process of consumers.
The antibacterial agent commonly used for the antibacterial modification of the polypropylene plastic is an inorganic antibacterial agent such as Ag ions and salt compounds thereof, an organic antibacterial agent, a natural antibacterial agent and the like, but the polypropylene antibacterial plastic can be polluted by aerosol such as dust, impurities, oil and the like existing in the air in long-term use, and meanwhile, bacteria killed on the surface can be deposited on the surface of the antibacterial material to generate bacterial plaque, so that the problems of efficiency reduction and attenuation of the antibacterial material are caused.
Therefore, it is desirable to provide a novel polypropylene plastic and a method for preparing the same.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides polypropylene plastic which not only has low surface tension, but also has excellent antibacterial and mildewproof effects.
In one aspect, the present invention provides a polypropylene plastic comprising, by weight of the polypropylene plastic:
(1) 85-94 parts of polypropylene resin;
(2) 1-5 parts of an antibacterial agent; and
(3) 5-10 parts of PDMS surface modified diatomite.
In an embodiment of the invention, the antimicrobial agent is a monatomic antimicrobial agent; the monatomic antibacterial material comprises a carrier and a transition metal, wherein the carrier is selected from one or more of titanium dioxide, diatomite, calcium carbonate, kaolin, alumina and zeolite molecular sieves, and the transition metal is selected from one or more of iron, cobalt, nickel, copper, zinc, silver and manganese; preferably, the transition metal is selected from one or more of copper, zinc and silver.
In an embodiment of the present invention, the polypropylene plastic further comprises, based on the weight of the polypropylene plastic:
(4)0.1 to 0.5 parts of stearate.
In an embodiment of the invention, the diatomaceous earth has a weight average particle size of from 5 to 30 microns.
In an embodiment of the invention, the polypropylene plastic is substantially free of any fluorine-containing compounds.
In another aspect, the present invention also provides a method for preparing the polypropylene plastic, the method comprising:
(1) providing a mixture comprising a polypropylene resin, an antimicrobial agent, diatomaceous earth, and a stearate;
(2) melt extruding the mixture to form a polypropylene plastic.
In an embodiment of the invention, the antimicrobial agent is a monatomic antimicrobial agent;
the monatomic antibacterial material comprises a carrier and a transition metal, wherein the carrier is selected from one or more of titanium dioxide, diatomite, calcium carbonate, kaolin, alumina and zeolite molecular sieves, and the transition metal is selected from one or more of iron, cobalt, nickel, copper, zinc, silver and manganese;
preferably, the transition metal is selected from one or more of copper, zinc and silver.
In an embodiment of the invention, the method further comprises: adding a silane coupling agent into the diatomite and mixing; then adding PDMS, and mixing to form PDMS surface modified diatomite;
preferably, the silane coupling agent is a silane coupling agent with amino functional groups.
In an embodiment of the invention, the diatomaceous earth has a weight average particle size of from 5 to 30 microns.
In an embodiment of the invention, the method does not include any step of adding a fluorine-containing compound.
In the invention, the surface tension of the polypropylene plastic can be reduced by adding the diatomite, especially the diatomite with the PDMS surface modified into the polypropylene resin by means of melt blending, thereby reducing and reducing dust, impurities and microorganisms adhered to the surface of the polypropylene plastic. Meanwhile, the diatomite with the PDMS surface modified can be cooperated with the monatomic antibacterial agent, so that the mildew-proof effect of the polypropylene plastic is further improved. Moreover, the diatomite surface-modified by the PDMS does not influence the antibacterial effect of the monoatomic antibacterial agent, has good antibacterial performance on Candida albicans, Escherichia coli and Staphylococcus aureus, and has the antibacterial rate of more than 99%. In the polypropylene material prepared by adopting the monoatomic metal antibacterial agent, the content of heavy metal is far lower than the minimum industrial standard, so that the application safety of the polypropylene plastic is greatly improved, and the polypropylene plastic has a wide application prospect.
Detailed Description
These and other features and advantages of the present invention will become apparent upon reading the following detailed description. It is to be understood that both the foregoing general description and the following detailed description are explanatory only and are not restrictive of aspects as claimed.
The various ranges disclosed herein are defined as lower and upper limits, with a given range being defined by a selection of one lower limit and one upper limit, with the selection of the lower limit and the upper limit defining the boundaries of the particular range. Ranges defined in this manner may or may not include the stated limits and may be arbitrarily combined, i.e., any lower limit may be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for a particular parameter, it is understood that ranges of 60-110 and 80-120 are also contemplated. Furthermore, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In this application, unless otherwise stated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, a numerical range of "0 to 5" indicates that all real numbers between "0 to 5" have been listed herein, and "0 to 5" is simply an abbreviated representation of the combination of these numbers. In addition, when a parameter is an integer of 2 or more, it is equivalent to disclose that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, or the like.
In the present application, all embodiments and preferred embodiments mentioned herein may be combined with each other to form new solutions, if not specifically stated. In the present application, all technical features mentioned herein as well as preferred features may be combined with each other to form new solutions, if not specified otherwise.
In the present application, the terms "include" and "comprise" as used herein mean open or closed unless otherwise specified. For example, the terms "comprising" and "comprises" may mean that other components not listed may also be included or included, or that only listed components may be included or included.
In the description herein, the term "or" is inclusive, unless otherwise specified. For example, the phrase "a or B" means "a, B, or both a and B. More specifically, either of the following conditions satisfies the condition "a or B": a is true (or present) and B is false (or not present); a is false (or not present) and B is true (or present); or both a and B are true (or present).
In the present invention, in order to reduce the surface pollution of the polypropylene plastic, the polypropylene plastic surface is generally required to have certain repellency to dust, impurities and various aerosols in the air, particularly water aerosol and oil aerosol. For this reason, the inventors have studied and found that by adding diatomaceous earth, particularly surface-modified diatomaceous earth of Polydimethylsiloxane (PDMS), to polypropylene resin in a melt-blending manner, the surface tension of polypropylene plastic can be greatly reduced, thereby reducing and decreasing the adhesion capability of dust, impurities and aerosol on the surface of polypropylene plastic. Meanwhile, the PDMS is environment-friendly and harmless to human bodies, so that the harm to the environment is reduced.
In the invention, the polypropylene plastic comprises, by weight, 85-94 parts, 88-94 parts, 90-94 parts, 92-94 parts, 85-92 parts, 88-92 parts, 90-92 parts, 85-90 parts, 88-90 parts or 85-88 parts of polypropylene resin. In the present invention, the polypropylene resin may be subjected to various modifications in advance, for example, chemical modifications (e.g., copolymerization modification, graft modification, crosslinking modification, etc.) and physical modifications (e.g., filling modification, blend modification, reinforcing modification, etc.).
In the invention, the polypropylene plastic comprises 1 to 5 parts, 1 to 4 parts, 1 to 3 parts, 1 to 2 parts, 2 to 5 parts, 2 to 4 parts, 2 to 3 parts, 3 to 5 parts, 3 to 4 parts or 4 to 5 parts of antibacterial agent by weight of the polypropylene plastic. In the present invention, the antibacterial agent may be an inorganic antibacterial agent, for example, a monoatomic antibacterial agent; the monatomic antibacterial material comprises a carrier and a transition metal, wherein the carrier is selected from one or more of titanium dioxide, diatomite, calcium carbonate, kaolin, alumina and zeolite molecular sieves, and the transition metal is selected from one or more of iron, cobalt, nickel, copper, zinc, silver and manganese; preferably, the transition metal is selected from one or more of copper, zinc and silver. In specific embodiments, the mass ratio of the transition metal of the monatomic antibacterial agent to the carrier is 1:10 to 1:100, 1:10 to 1:60, 1:10 to 1:20, 1:20 to 1:100, or 1:20 to 1: 60.
In the invention, the polypropylene plastic comprises, by weight, 5 to 10 parts, 5 to 9 parts, 5 to 8 parts, 5 to 7 parts, 5 to 6 parts, 6 to 10 parts, 6 to 9 parts, 6 to 8 parts, 6 to 7 parts, 7 to 10 parts, 7 to 9 parts, 7 to 8 parts, 8 to 10 parts, 8 to 9 parts, or 9 to 10 parts of diatomite. In the present invention, the diatomaceous earth may be selected from one or more of natural diatomaceous earth, inorganic modified diatomaceous earth, and organic modified diatomaceous earth. As a preferred embodiment of the present invention, the diatomaceous earth may be Polydimethylsiloxane (PDMS) surface-modified diatomaceous earth. In some embodiments, the diatomaceous earth of the present invention may have a weight average particle size of 5 to 30 microns, 5 to 25 microns, 5 to 20 microns, 5 to 15 microns, or 5 to 10 microns.
In the invention, the polypropylene plastic comprises 0.1 to 0.5 part, 0.1 to 0.4 part, 0.1 to 0.3 part, 0.1 to 0.2 part, 0.2 to 0.5 part, 0.2 to 0.4 part, 0.2 to 0.3 part, 0.3 to 0.5 part, 0.3 to 0.4 part or 0.4 to 0.5 part of stearate by weight of the polypropylene plastic. In the invention, the stearate is used as a dispersing agent to be melt-blended in the polypropylene resin so as to effectively disperse the raw materials of each substance, improve the uniformity of the material and fully reduce the surface tension of the polypropylene plastic. In some embodiments, the stearate is selected from a mixture of one or more of calcium stearate, magnesium stearate, and zinc stearate.
It is well known that fluorine atoms have an ultra-low surface tension, so that fluorine-containing compounds, such as PTFE (fluorosurfactant), are commonly used to control and improve the surface properties of polypropylene. However, it is gradually recognized that the fluorine-containing compound brings harmful substances in long-term production or use and is not friendly to the environment; the use of fluorine-containing compounds has now begun to be progressively limited and reduced. Thus, in some embodiments of the invention, the polypropylene plastic need not contain any fluorochemical.
The method for preparing the polypropylene plastic comprises the following steps: (1) providing a mixture comprising a polypropylene resin, an antimicrobial agent, diatomaceous earth and a stearate; (2) melt extruding the mixture to form a polypropylene plastic. On the one hand, the surface of the diatomite is modified by selecting PDMS, the modified diatomite is filled in the polypropylene plastic, the polypropylene composite material is ensured to have lower surface tension under the condition that the antibacterial agent exists, and meanwhile, the antibacterial effect of the polypropylene plastic is not influenced. On the other hand, inorganic antibacterial agents are safer and more durable than organic antibacterial agents. The inventor finds that: the silver ion antibacterial agent has better antibacterial effect in the polypropylene plastic, and the copper ion and zinc ion antibacterial agent has better mildew-proof effect in the polypropylene plastic. Therefore, the invention selects the specific type of antibacterial and mildewproof agent to ensure that the polypropylene antibacterial plastic has a lasting antibacterial and mildewproof effect.
In a specific embodiment, the preparation method of the polypropylene plastic mainly comprises the following steps: weighing the raw materials according to the proportion, mixing the polypropylene resin, the monatomic antibacterial agent, the PDMS modified diatomite and the stearate by a high-speed mixer at the rotating speed of 400-800 revolutions per minute (rpm) for 3-5 minutes, and performing melt extrusion, cooling and granulation on the mixed materials by a double-screw extruder to obtain the polypropylene composite material; the extrusion temperature is 80-220 ℃, and the rotation speed of the twin-screw extruder is 300-500 revolutions per minute (rpm).
In an embodiment of the invention, the method further comprises: adding a silane coupling agent into the diatomite and mixing; and wetting the diatomite by using a silane coupling agent, adding PDMS, and mixing to form the PDMS surface modified diatomite. In the present invention, the silane coupling agent is a silane coupling agent having an amino functional group. In a specific embodiment of the present invention, gamma-aminopropyltriethoxysilane (KH-550) may be used. In a specific embodiment, the diatomite and the silane coupling agent are added into a grinding machine for mixing, so that alcoholic hydroxyl groups in the silane coupling agent are sufficiently associated with adsorption hydrogen bonds on the surface of the diatomite, and the silane coupling agent is sufficiently grafted to the diatomite, so that the surface of the diatomite has an amino structure. And then adding PDMS with hydroxyl at the tail end, and continuing mixing to ensure that the PDMS is fully coated on the surface of the diatomite, so that the amino group on the diatomite and the hydroxyl on the PDMS form chemical bonding. Then, the mixture was dried in an oven to obtain diatomaceous earth with PDMS coated on the surface. Wherein, the diatomite comprises PDMS and a silane coupling agent which are 50 (5-10) and 1 in parts by weight.
By way of example, the PDMS surface-modified diatomaceous earth of the present invention is prepared as follows: the method comprises the steps of adding diatomite into a small-sized grinder, adding a silane coupling agent KH-550 into the diatomite in a weight ratio of 50:1, and mixing, wherein the rotation speed of the small-sized grinder is 600 revolutions per minute (rpm), and the mixing time is about 3-5 minutes. And then adding PDMS according to the weight ratio of 1:10 of PDMS to diatomite, continuously mixing for 3-5 minutes, taking out the mixed mixture, and drying in an oven, wherein the drying temperature of the oven is 105 ℃ and the drying time is 30-60 minutes, so as to obtain the diatomite with the surface modified by the PDMS coating and having low surface energy. In the present invention, the surface tension of the PDMS surface modified diatomaceous earth is less than or equal to 20.9 mN/m.
In an embodiment of the invention, the method does not comprise any step of actively adding a fluorine-containing compound.
Examples
The invention will be further illustrated with reference to the following specific examples.
The raw materials used in the examples of the present invention are commercially available as follows:
(1) polypropylene resin: EM248U, RiandBarcel industries, 2.16kg at 230 ℃ melt index MFR of 24g/10 min;
(2) a monoatomic antibacterial agent: particle size 4000 mesh, biborowa technologies ltd, wherein the carrier is diatomaceous earth, and the transition metal comprises copper, zinc and/or silver monoatomic atoms;
(3) PDMS: national chemical group chemical agents ltd, viscosity 5000 cp;
(4) silane coupling agent KH 550: gamma-aminopropyltriethoxysilane, caruncle cheng chemicals ltd;
(5) diatomite: particle size 600 mesh, national drug group chemical reagents ltd;
(6) stearate salt: zinc stearate, superfine, Hangzhou Tanjiang grease chemical Co.
Performance testing method used in embodiment of the invention
(1) Antibacterial property: QB/T2591-2003 antibacterial plastic-antibacterial performance test method and antibacterial effect.
(2) Mildew resistance: JIS Z2911:2018 appendix A mould proof test method for plastic products; wherein the test strains are Aspergillus niger, Penicillium funiculosum, Trichoderma viride, Chaetomium globosum and Paecilomyces variotii; rating standard:
level 0: no fungal growth was seen visually and under a microscope, and an area of inhibition was visible around the test sample, the width of which was recorded in mm;
level 1: no mold growth was observed visually, but mold growth was visible under a microscope;
stage 2: hypha growth can be obviously seen through visual inspection, and the area of the mildew growing on the sample cannot exceed 25% of the total area of the sample; and
and 3, level: hypha growth can be obviously seen through visual inspection, and the area of the long mold of the sample accounts for 25-50% of the total area of the sample.
(3) Surface tension: GB/T14216-.
The components of the polypropylene plastics of examples 1 to 3 and comparative examples 1 to 4 are shown in table 1 in parts by weight.
Table 1:
the preparation methods of examples 1 to 3 and comparative examples 1 to 4 include the following steps:
(1) preparation of PDMS surface modified diatomaceous Earth
Adding diatomite into a small-sized grinding machine, and mixing the diatomite and the small-sized grinding machine according to a weight ratio of 50: adding KH550 silane coupling agent into 1, mixing, rotating at 600rpm of a small grinder for 3-5 minutes, adding PDMS (polydimethylsiloxane), wherein the weight ratio of PDMS to diatomite is 10:1, continuously mixing for 3-5 minutes, taking out the mixed mixture, drying in an oven at 105 ℃ for 30-60 minutes to obtain the diatomite with low surface energy coated by PDMS on the surface.
(2) The polypropylene resin, the monoatomic antimicrobial agent, the PDMS surface-modified diatomaceous earth prepared in the above (1), and zinc stearate were weighed in parts by weight as described in table 1, and placed in a high-speed mixer to be mixed at a rotation speed of 600rpm for about 3 minutes, to obtain a mixed raw material.
(3) Feeding the mixed raw materials into a main feeding bin of a tightly meshed and co-rotating double-screw extruder, wherein the diameter of a screw of the extruder is 35mm, the length-diameter ratio L/D is 40, and the temperature of each subarea of a main machine cylinder from a feeding port to a machine head outlet is set as follows: 120 ℃, 180 ℃, 190 ℃, 210 ℃, 220 ℃, 200 ℃ and the rotation speed of a main machine is 400rpm, and the polypropylene plastic is obtained after the processes of melt extrusion, cooling, granulation, drying treatment and the like.
The polypropylene plastics prepared according to the table 1 are prepared into test samples according to the test methods and requirements, and the antibacterial performance, the mildew resistance and the surface tension are tested, and the test results are shown in the table 2.
Table 2: performance test results for Polypropylene plastics
As described above, by adding the PDMS surface-modified diatomaceous earth, examples 1 to 3 of the present invention can effectively reduce the surface tension of polypropylene plastic and prevent the adhesion of dust, aerosol, and microorganisms. Comparing example 3 with comparative examples 1 and 5, it can be seen that the PDMS surface modified diatomaceous earth and an antimicrobial (e.g., a monoatomic antimicrobial) can produce synergy in polypropylene plastics, providing better mold protection, achieving no fungal growth both visually and under a microscope. However, diatomaceous earth (unmodified) itself cannot produce a synergistic effect with an antibacterial agent, and cannot provide a better antifungal effect. In comparative examples 1 and 5, although no mold growth was visually observed, the mold growth was observed under a microscope.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications can be made by those skilled in the art after reading the contents of the present invention, and those equivalents also fall within the scope of the invention defined by the appended claims.
Claims (10)
1. A polypropylene plastic, comprising, in parts by weight of the polypropylene plastic:
(1) 85-94 parts of polypropylene resin;
(2) 1-5 parts of an antibacterial agent; and
(3) 5-10 parts of PDMS surface modified diatomite.
2. The polypropylene plastic of claim 1, wherein the antimicrobial agent is a monatomic antimicrobial agent;
the monatomic antibacterial material comprises a carrier and a transition metal, wherein the carrier is selected from one or more of titanium dioxide, diatomite, calcium carbonate, kaolin, alumina and zeolite molecular sieves, and the transition metal is selected from one or more of iron, cobalt, nickel, copper, zinc, silver and manganese;
preferably, the transition metal is selected from one or more of copper, zinc and silver.
3. The polypropylene plastic of claim 1, wherein the polypropylene plastic further comprises, by weight of the polypropylene plastic:
(4)0.1 to 0.5 parts of stearate.
4. The polypropylene plastic of claim 1, wherein the diatomaceous earth has a weight average particle size of 5-30 microns.
5. The polypropylene plastic according to claim 1, wherein the polypropylene plastic is free of any fluorine-containing compounds.
6. A method of making the polypropylene plastic of claim 1, comprising:
(1) providing a mixture comprising a polypropylene resin, an antimicrobial agent, and PDMS surface-modified diatomaceous earth;
(2) melt extruding the mixture to form a polypropylene plastic.
7. The method of claim 6, wherein the antimicrobial agent is a monatomic antimicrobial agent;
the monatomic antibacterial material comprises a carrier and a transition metal, wherein the carrier is selected from one or more of titanium dioxide, diatomite, calcium carbonate, kaolin, alumina and zeolite molecular sieves, and the transition metal is selected from one or more of iron, cobalt, nickel, copper, zinc, silver and manganese;
preferably, the transition metal is selected from one or more of copper, zinc and silver.
8. The method of claim 6, wherein the method further comprises: adding a silane coupling agent into diatomite and mixing; then adding PDMS, and mixing to form the PDMS surface modified diatomite;
preferably, the silane coupling agent is a silane coupling agent with amino functional groups.
9. The method of claim 6, wherein the diatomaceous earth has a weight average particle size of 5-30 microns.
10. The method of claim 6, wherein the method does not include any step of adding a fluorine-containing compound.
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