CN106519389A - A nanometer packaging material having a fresh keeping function and a preparing method thereof - Google Patents
A nanometer packaging material having a fresh keeping function and a preparing method thereof Download PDFInfo
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- 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
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- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2201/00—Properties
- C08L2201/14—Gas barrier composition
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- 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
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
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- C08L2207/066—LDPE (radical process)
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Abstract
A nanometer packaging material having a fresh keeping function and a preparing method thereof are provided. The material is prepared by steps of (1) mixing wollastonite and sepiolite, adding the mixture into a grinding machine, grinding the mixture, and sieving the ground mixture with a sieve having a size of 200 meshes to obtain a powder mixture, (2) adding nanometer silver powder, nanometer titanium dioxide, chitosan, low density polyethylene, an ethylene-vinyl alcohol copolymer, tea tree essential oil, vetiver essential oil, a silane coupling agent Si-602, N-(beta-aminoethyl)-gamma-aminopropyltrimethoxysilane, N,N'-ethylenebis(stearamide), oleamide, and an antioxidant 1076, adding the materials into a high-speed mixer and mixing the materials, (3) performing extrusion and granulation through a double screw extruder and (4) cooling and then performing blow moulding through a blowing machine. The nanometer packaging material has characteristics of good tensile strength, excellent fresh keeping functions, effective moisture retention, capability of insulating oxygen to reduce harms caused by oxidation, good antibacterial effects and a high bacteriostasis rate.
Description
Technical field
The present invention relates to packaging material field, and in particular to a kind of nano packaging material with preservation and its preparation
Method.
Background technology
Nano packaging material is exactly to apply nanotechnology, adopts nano compound packing material, so that packaging is with super
The one class packaging aggregation of function or unconventional characteristic.It is wrapped with other with the granule or crystal that dispersed phase size is 1-100nm
Package material is compound or addition is made, the nano compound packing material with nanoscale structures unit.By carrying out with other compositions
It is compound, the packaging material of different functionalities can be obtained, the packaging material with preservation are exactly one of which.Fruit and vegerable are fresh
To avoid, by aoxidizing iso-metamorphism harm, needing to protect which in transport storage, most long is exactly using tool
There are the packaging material of preservation, therefore, research and develop the packaging material with remarkable preservation fresh for extending
The storage phase of food has important effect, while having vast potential for future development.
The content of the invention
Technical problem to be solved：It is an object of the invention to provide a kind of nano packaging material with preservation, resists
Preferably, preservation is remarkable for Zhang Qiangdu, energy effectively moisturizing, while starvation, reduces the harm of oxidation, also has in addition very
Good antibacterial effect, bacteriostasis rate are high.
Technical scheme：A kind of nano packaging material with preservation, is prepared from weight portion by following component：Receive
Rice argentum powder 2-5 parts, nano titanium oxide 10-20 parts, chitosan 5-10 parts, wollastonite 0.2-0.5 parts, meerschaum 0.1-
0.3 part, Low Density Polyethylene 40-50 parts, ethylene-vinyl alcohol copolymer 10-20 parts, tea tree ethereal oil 0.2-0.4 parts, vetivert
Oily 0.2-0.5 parts, silane coupler Si-602 3-5 parts, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane 4-7 parts, second
Support bis-stearamides 1-2 part, oleamide 1-2 parts, antioxidant 1076 1-3 parts.
It is further preferred that a kind of described nano packaging material with preservation, by following component with weight portion
It is prepared from：Nanometer silver powder 3-4 parts, nano titanium oxide 12-18 parts, chitosan 6-9 parts, wollastonite 0.3-0.4 parts,
Meerschaum 0.15-0.25 parts, Low Density Polyethylene 42-48 parts, ethylene-vinyl alcohol copolymer 13-17 parts, tea tree ethereal oil 0.25-
0.35 part, cus-cus essential oil 0.3-0.4 part, silane coupler Si-602 3.5-4.5 parts, N- (β-aminoethyl)-γ-aminopropyl
Trimethoxy silane 5-6 parts, ethylene bis stearamide 1.3-1.8 parts, oleamide 1.2-1.7 parts, antioxidant 1076 1.5-
2.5 part.
The preparation method of the above-mentioned nano packaging material with preservation is comprised the following steps：
（1）Wollastonite and meerschaum are mixed, and 2-3 hours are ground in being put into grinder, are crossed 200 mesh sieves, obtain mixed powder；
（2）Add nanometer silver powder, nano titanium oxide, chitosan, Low Density Polyethylene, ethylene vinyl alcohol copolymer
Thing, tea tree ethereal oil, cus-cus essential oil, silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane, second
Support bis-stearamides, oleamide and antioxidant 1076, mix in being put into high-speed mixer under rotating speed 3000-4000r/min
3-5 minutes；
（3）Jing double screw extruders carry out extruding pelletization, and each area's temperature is followed successively by 150-160 DEG C, 160-180 DEG C, 180-200
DEG C, screw speed is 30-35r/min；
（4）Jing blow moulding machines blow molding after cooling, blown film temperature are 190-200 DEG C, and rotating speed is 40-50r/min.
It is further preferred that step（1）Middle milling time is 2.5 hours.
It is further preferred that step（2）Middle rotating speed is 3500r/min, and incorporation time is 4 minutes.
It is further preferred that step（3）Zhong Ge areas temperature is followed successively by 155 DEG C, 170 DEG C, 190 DEG C, and screw speed is 32-
34r/min。
It is further preferred that step（4）Middle blown film temperature is 195 DEG C, and rotating speed is 45r/min.
Beneficial effect：The nano packaging material with preservation of the present invention has preferable tensile strength, and highest can
Up to 25.68MPa, preservation is remarkable, and vapor transfer rate and oxygen permeating amount are only 0.94g/ (cm respectively224h) and 0.151cm3/(m2·
24h 0.1MPa), energy effectively moisturizing, while starvation, reduces the harm of oxidation, this material also has well in addition
Antibacterial effect, after 24 hours, which can reach 91.1% to colibacillary antibiotic rate, and bacteriostasis rate is high.
Specific embodiment
Embodiment 1
A kind of nano packaging material with preservation, is prepared from weight portion by following component：2 parts of nanometer silver powder, receive
10 parts of titanium dioxide of rice, 5 parts of chitosan, 0.2 part of wollastonite, 0.1 part of meerschaum, 40 parts of Low Density Polyethylene, ethylene-
10 parts of ethenol copolymer, 0.2 part of tea tree ethereal oil, 0.2 part of cus-cus essential oil, 3 parts of silane coupler Si-602, N- (β-ammonia second
Base) 4 parts of-γ-aminopropyltrimethoxysilane, 1 part of ethylene bis stearamide, 1 part of oleamide, 1 part of antioxidant 1076.
The preparation method of the above-mentioned nano packaging material with preservation is：
（1）Wollastonite and meerschaum are mixed, is ground 2 hours in being put into grinder, is crossed 200 mesh sieves, obtain mixed powder；
（2）Add nanometer silver powder, nano titanium oxide, chitosan, Low Density Polyethylene, ethylene vinyl alcohol copolymer
Thing, tea tree ethereal oil, cus-cus essential oil, silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane, second
Support bis-stearamides, oleamide and antioxidant 1076, mix 3 minutes in being put into high-speed mixer under rotating speed 3000r/min；
（3）Jing double screw extruders carry out extruding pelletization, and each area's temperature is followed successively by 150 DEG C, 160 DEG C, 180 DEG C, and screw speed is
30r/min；
（4）Jing blow moulding machines blow molding after cooling, blown film temperature are 190 DEG C, and rotating speed is 40r/min.
Embodiment 2
A kind of nano packaging material with preservation, is prepared from weight portion by following component：3 parts of nanometer silver powder, receive
12 parts of titanium dioxide of rice, 6 parts of chitosan, 0.3 part of wollastonite, 0.15 part of meerschaum, 42 parts of Low Density Polyethylene, second
13 parts of alkene-ethenol copolymer, 0.25 part of tea tree ethereal oil, 0.3 part of cus-cus essential oil, 3.5 parts of silane coupler Si-602, N-
5 parts of (β-aminoethyl)-γ-aminopropyltrimethoxysilane, 1.3 parts of ethylene bis stearamide, 1.2 parts of oleamide, antioxidant
1076 1.5 parts.
The preparation method of the above-mentioned nano packaging material with preservation is：
（1）Wollastonite and meerschaum are mixed, is ground 2.5 hours in being put into grinder, is crossed 200 mesh sieves, obtain mixed powder；
（2）Add nanometer silver powder, nano titanium oxide, chitosan, Low Density Polyethylene, ethylene vinyl alcohol copolymer
Thing, tea tree ethereal oil, cus-cus essential oil, silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane, second
Support bis-stearamides, oleamide and antioxidant 1076, mix 4 minutes in being put into high-speed mixer under rotating speed 3200r/min；
（3）Jing double screw extruders carry out extruding pelletization, and each area's temperature is followed successively by 155 DEG C, 165 DEG C, 185 DEG C, and screw speed is
32r/min；
（4）Jing blow moulding machines blow molding after cooling, blown film temperature are 195 DEG C, and rotating speed is 45r/min.
Embodiment 3
A kind of nano packaging material with preservation, is prepared from weight portion by following component：3.5 parts of nanometer silver powder,
15 parts of nano titanium oxide, 7.5 parts of chitosan, 0.35 part of wollastonite, 0.2 part of meerschaum, 45 parts of Low Density Polyethylene,
15 parts of ethylene-vinyl alcohol copolymer, tea tree ethereal oil 0.3,0.35 part of cus-cus essential oil, 4 parts of silane coupler Si-602, N- (β-
Aminoethyl) 5.5 parts of-γ-aminopropyltrimethoxysilane, 1.5 parts of ethylene bis stearamide, 1.5 parts of oleamide, antioxidant
1076 2 parts.
The preparation method of the above-mentioned nano packaging material with preservation is：
（1）Wollastonite and meerschaum are mixed, is ground 2.5 hours in being put into grinder, is crossed 200 mesh sieves, obtain mixed powder；
（2）Add nanometer silver powder, nano titanium oxide, chitosan, Low Density Polyethylene, ethylene vinyl alcohol copolymer
Thing, tea tree ethereal oil, cus-cus essential oil, silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane, second
Support bis-stearamides, oleamide and antioxidant 1076, mix 4 minutes in being put into high-speed mixer under rotating speed 3500r/min；
（3）Jing double screw extruders carry out extruding pelletization, and each area's temperature is followed successively by 155 DEG C, 170 DEG C, 190 DEG C, and screw speed is
33r/min；
（4）Jing blow moulding machines blow molding after cooling, blown film temperature are 195 DEG C, and rotating speed is 45r/min.
Embodiment 4
A kind of nano packaging material with preservation, is prepared from weight portion by following component：4 parts of nanometer silver powder, receive
18 parts of titanium dioxide of rice, 9 parts of chitosan, 0.4 part of wollastonite, 0.25 part of meerschaum, 48 parts of Low Density Polyethylene, second
17 parts of alkene-ethenol copolymer, 0.35 part of tea tree ethereal oil, 0.4 part of cus-cus essential oil, 4.5 parts of silane coupler Si-602, N-
6 parts of (β-aminoethyl)-γ-aminopropyltrimethoxysilane, 1.8 parts of ethylene bis stearamide, 1.7 parts of oleamide, antioxidant
1076 2.5 parts.
The preparation method of the above-mentioned nano packaging material with preservation is：
（1）Wollastonite and meerschaum are mixed, is ground 2.5 hours in being put into grinder, is crossed 200 mesh sieves, obtain mixed powder；
（2）Add nanometer silver powder, nano titanium oxide, chitosan, Low Density Polyethylene, ethylene vinyl alcohol copolymer
Thing, tea tree ethereal oil, cus-cus essential oil, silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane, second
Support bis-stearamides, oleamide and antioxidant 1076, mix 4 minutes in being put into high-speed mixer under rotating speed 3800r/min；
（3）Jing double screw extruders carry out extruding pelletization, and each area's temperature is followed successively by 155 DEG C, 175 DEG C, 195 DEG C, and screw speed is
34r/min；
（4）Jing blow moulding machines blow molding after cooling, blown film temperature are 195 DEG C, and rotating speed is 45r/min.
Embodiment 5
A kind of nano packaging material with preservation, is prepared from weight portion by following component：5 parts of nanometer silver powder, receive
20 parts of titanium dioxide of rice, 10 parts of chitosan, 0.5 part of wollastonite, 0.3 part of meerschaum, 50 parts of Low Density Polyethylene, second
20 parts of alkene-ethenol copolymer, 0.4 part of tea tree ethereal oil, 0.5 part of cus-cus essential oil, 5 parts of silane coupler Si-602, N- (β-
Aminoethyl) 7 parts of-γ-aminopropyltrimethoxysilane, 2 parts of ethylene bis stearamide, 2 parts of oleamide, antioxidant 1076 3
Part.
The preparation method of the above-mentioned nano packaging material with preservation is：
（1）Wollastonite and meerschaum are mixed, is ground 3 hours in being put into grinder, is crossed 200 mesh sieves, obtain mixed powder；
（2）Add nanometer silver powder, nano titanium oxide, chitosan, Low Density Polyethylene, ethylene vinyl alcohol copolymer
Thing, tea tree ethereal oil, cus-cus essential oil, silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane, second
Support bis-stearamides, oleamide and antioxidant 1076, mix 5 minutes in being put into high-speed mixer under rotating speed 4000r/min；
（3）Jing double screw extruders carry out extruding pelletization, and each area's temperature is followed successively by 160 DEG C, 180 DEG C, 200 DEG C, and screw speed is
35r/min；
（4）Jing blow moulding machines blow molding after cooling, blown film temperature are 200 DEG C, and rotating speed is 50r/min.
Comparative example 1
The present embodiment is not contain wollastonite and meerschaum with the difference of embodiment 1.Specifically：
A kind of nano packaging material with preservation, is prepared from weight portion by following component：2 parts of nanometer silver powder, receive
10 parts of titanium dioxide of rice, 5 parts of chitosan, 40 parts of Low Density Polyethylene, 10 parts of ethylene-vinyl alcohol copolymer, Camellia sinensis essence
0.2 part of oil, 0.2 part of cus-cus essential oil, 3 parts of silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyl trimethoxy silicon
4 parts of alkane, 1 part of ethylene bis stearamide, 1 part of oleamide, 1 part of antioxidant 1076.
The preparation method of the above-mentioned nano packaging material with preservation is：
（1）By nanometer silver powder, nano titanium oxide, chitosan, Low Density Polyethylene, ethylene-vinyl alcohol copolymer,
Tea tree ethereal oil, cus-cus essential oil, silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane, ethylene
Bis-stearamides, oleamide and antioxidant 1076 mix 3 minutes in being put into high-speed mixer under rotating speed 3000r/min；
（2）Jing double screw extruders carry out extruding pelletization, and each area's temperature is followed successively by 150 DEG C, 160 DEG C, 180 DEG C, and screw speed is
30r/min；
（3）Jing blow moulding machines blow molding after cooling, blown film temperature are 190 DEG C, and rotating speed is 40r/min.
Comparative example 2
The present embodiment is not contain tea tree ethereal oil and cus-cus essential oil with the difference of embodiment 1.Specifically：
A kind of nano packaging material with preservation, is prepared from weight portion by following component：2 parts of nanometer silver powder, receive
10 parts of titanium dioxide of rice, 5 parts of chitosan, 0.2 part of wollastonite, 0.1 part of meerschaum, 40 parts of Low Density Polyethylene, ethylene-
10 parts of ethenol copolymer, 3 parts of silane coupler Si-602,4 parts of N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane,
1 part of ethylene bis stearamide, 1 part of oleamide, 1 part of antioxidant 1076.
The preparation method of the above-mentioned nano packaging material with preservation is：
（1）Wollastonite and meerschaum are mixed, is ground 2 hours in being put into grinder, is crossed 200 mesh sieves, obtain mixed powder；
（2）Add nanometer silver powder, nano titanium oxide, chitosan, Low Density Polyethylene, ethylene vinyl alcohol copolymer
Thing, silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane, ethylene bis stearamide, Oleic acid acyl
Amine and antioxidant 1076, mix 3 minutes in being put into high-speed mixer under rotating speed 3000r/min；
（3）Jing double screw extruders carry out extruding pelletization, and each area's temperature is followed successively by 150 DEG C, 160 DEG C, 180 DEG C, and screw speed is
30r/min；
（4）Jing blow moulding machines blow molding after cooling, blown film temperature are 190 DEG C, and rotating speed is 40r/min.
The mechanical property and preservation index of the nano packaging material with preservation of the present invention see the table below, we
Can see, material of the present invention has preferable tensile strength, reach as high as 25.68MPa, preservation is remarkable, vapor transfer rate and
Oxygen permeating amount is only 0.94g/ (cm respectively224h) and 0.151cm3/(m224h 0.1MPa), can effectively moisturizing, with after
Anoxybiotic gas, reduces the harm of oxidation, and this material also has good antibacterial effect in addition, and after 24 hours, which is to colibacillary anti-
Bacterium rate can reach 91.1%, and bacteriostasis rate is high.
Table 1 has the mechanical property and preservation of the nano packaging material of preservation
| Name of product | Tensile strength（MPa） | Vapor transfer rate（g/(cm2·24h)） | Oxygen permeating amount（cm3/(m2·24h·0.1MPa)） | 24h antibiotic rates（%） |
| Embodiment 1 | 25.37 | 1.01 | 0.157 | 88.9 |
| Embodiment 2 | 25.43 | 0.99 | 0.155 | 89.4 |
| Embodiment 3 | 25.56 | 0.97 | 0.154 | 90.2 |
| Embodiment 4 | 25.68 | 0.94 | 0.151 | 91.1 |
| Embodiment 5 | 25.55 | 0.95 | 0.152 | 90.4 |
| Comparative example 1 | 23.56 | 1.09 | 0.165 | 88.9 |
| Comparative example 2 | 25.37 | 1.23 | 0.158 | 81.8 |
Note：In the measure of antibiotic rate, institute's antibacterial is escherichia coli.
Claims (7)
1. a kind of nano packaging material with preservation, it is characterised in that：It is prepared from weight portion by following component：Receive
Rice argentum powder 2-5 parts, nano titanium oxide 10-20 parts, chitosan 5-10 parts, wollastonite 0.2-0.5 parts, meerschaum 0.1-
0.3 part, Low Density Polyethylene 40-50 parts, ethylene-vinyl alcohol copolymer 10-20 parts, tea tree ethereal oil 0.2-0.4 parts, vetivert
Oily 0.2-0.5 parts, silane coupler Si-602 3-5 parts, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane 4-7 parts, second
Support bis-stearamides 1-2 part, oleamide 1-2 parts, antioxidant 1076 1-3 parts.
2. a kind of nano packaging material with preservation according to claim 1, it is characterised in that：By following component
It is prepared from weight portion：Nanometer silver powder 3-4 parts, nano titanium oxide 12-18 parts, chitosan 6-9 parts, wollastonite
0.3-0.4 parts, meerschaum 0.15-0.25 parts, Low Density Polyethylene 42-48 parts, ethylene-vinyl alcohol copolymer 13-17 parts, Camellia sinensis
Quintessence oil 0.25-0.35 parts, cus-cus essential oil 0.3-0.4 part, silane coupler Si-602 3.5-4.5 parts, N- (β-aminoethyl)-
γ-aminopropyltrimethoxysilane 5-6 parts, ethylene bis stearamide 1.3-1.8 parts, oleamide 1.2-1.7 parts, antioxidant
1076 1.5-2.5 parts.
3. the preparation method of a kind of nano packaging material with preservation described in any one of claim 1 to 2, its feature
It is：Comprise the following steps：
（1）Wollastonite and meerschaum are mixed, and 2-3 hours are ground in being put into grinder, are crossed 200 mesh sieves, obtain mixed powder；
（2）Add nanometer silver powder, nano titanium oxide, chitosan, Low Density Polyethylene, ethylene vinyl alcohol copolymer
Thing, tea tree ethereal oil, cus-cus essential oil, silane coupler Si-602, N- (β-aminoethyl)-γ-aminopropyltrimethoxysilane, second
Support bis-stearamides, oleamide and antioxidant 1076, mix in being put into high-speed mixer under rotating speed 3000-4000r/min
3-5 minutes；
（3）Jing double screw extruders carry out extruding pelletization, and each area's temperature is followed successively by 150-160 DEG C, 160-180 DEG C, 180-200
DEG C, screw speed is 30-35r/min；
（4）Jing blow moulding machines blow molding after cooling, blown film temperature are 190-200 DEG C, and rotating speed is 40-50r/min.
4. the preparation method of a kind of nano packaging material with preservation according to claim 3, it is characterised in that：
The step（1）Middle milling time is 2.5 hours.
5. the preparation method of a kind of nano packaging material with preservation according to claim 3, it is characterised in that：
The step（2）Middle rotating speed is 3500r/min, and incorporation time is 4 minutes.
6. the preparation method of a kind of nano packaging material with preservation according to claim 3, it is characterised in that：
The step（3）Zhong Ge areas temperature is followed successively by 155 DEG C, 170 DEG C, 190 DEG C, and screw speed is 32-34r/min.
7. the preparation method of a kind of nano packaging material with preservation according to claim 3, it is characterised in that：
The step（4）Middle blown film temperature is 195 DEG C, and rotating speed is 45r/min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107373287A (en) * | 2017-09-14 | 2017-11-24 | 陇南市朝华茶叶有限公司 | A kind of Longjing tea long-acting preservative and preparation method thereof |
| CN107513287A (en) * | 2017-08-23 | 2017-12-26 | 宁波华丰包装有限公司 | Antibacterial food freshness protection package |
| CN109401170A (en) * | 2018-10-31 | 2019-03-01 | 浙江卫斯敦环境科技有限公司 | A kind of nanometer food packaging material and preparation method thereof |
| US11850312B2 (en) | 2020-11-03 | 2023-12-26 | Imam Abdulrahman Bin Faisal University | Silver and titania-loaded polyethylene medical device film |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107373287A (en) * | 2017-09-14 | 2017-11-24 | 陇南市朝华茶叶有限公司 | A kind of Longjing tea long-acting preservative and preparation method thereof |
| CN109401170A (en) * | 2018-10-31 | 2019-03-01 | 浙江卫斯敦环境科技有限公司 | A kind of nanometer food packaging material and preparation method thereof |
| US11850312B2 (en) | 2020-11-03 | 2023-12-26 | Imam Abdulrahman Bin Faisal University | Silver and titania-loaded polyethylene medical device film |
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