CN115216074A - Medical sanitary hydrophobic dustproof functional filling master batch and application thereof - Google Patents
Medical sanitary hydrophobic dustproof functional filling master batch and application thereof Download PDFInfo
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- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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Abstract
The invention discloses a medical sanitary hydrophobic dustproof functional filling master batch, which is prepared by mixing a plastic base material and nano functional powder with the average particle size of less than or equal to 20nm, and then adding an auxiliary agent for granulation, wherein the addition amount of the nano functional powder is 5-20wt% of the filling master batch, and the addition amount of the auxiliary agent is 0.2-0.5wt% of the filling master batch. The nano functional powder is modified silicon-fluorine nano powder with hydrophobic and dustproof functions, is prepared by a method combining dynamic synthesis and static synthesis, and is prepared after oxygen isolation and drying. The film sample prepared from the medical sanitary hydrophobic dustproof functional filling master batch has a hydrophobic angle of 123 degrees and an oleophobic angle of 91 degrees, and has important application value in the fields of medical sanitary packaging materials, medical device materials and the like.
Description
Technical Field
The invention relates to a medical sanitary hydrophobic dustproof functional filling master batch, and in addition, the invention also relates to application of the medical sanitary hydrophobic dustproof functional filling master batch.
Background
The application of the medical sanitary material usually requires high requirements for surface cleaning, and substances with low surface energy such as fluorine and silicon materials can not adhere and contaminate the surface of the material, so that the material can well play a role in dewatering and dust prevention. This class of materials has found wide application in many markets. The functional filler is applied to functional filling master batches and can be used for preparing various plastic materials with the functions of hydrophobicity and dust prevention. At present, the method has been partially applied and explored. Chinese patent CN109989128A discloses a nylon fiber, which is prepared by mixing modified nylon master batches with common nylon chips and carrying out melt spinning to obtain the fiber with low surface friction coefficient and improved hydrophobicity, and the functional components of the fiber are polydimethylsiloxane and cage-shaped semi-siloxane with branched chain having amino. Chinese patent CN109749101A discloses a hydrophobic polyethylene master batch, which reduces the water drop condensation phenomenon of the inner wall of a greenhouse film and improves the light transmittance by applying the hydrophobic master batch, wherein a hydrophobic agent mainly comprises vinyl acetate-ethylene copolymer and an auxiliary agent emulsion thereof. Chinese patent CN112126148A discloses a super-hydrophobic material, which is prepared by mixing expandable microspheres or a mixture of the expandable microspheres and silicon dioxide modified by perfluoroalkane acrylate polymer with ethylene-vinyl acetate copolymer to obtain composite master batch, and finally realizing the effects of antifouling, waterproof and antifogging of the material.
The low surface energy functional material can play an important role in the aspects of hydrophobic self-cleaning dust prevention and the like, and the main research and development direction is that how to select a simple and stable material structure and put the material structure into practical application through a simple and efficient compound mode and a process flow. Too complex material structures and process conditions may not retain long-term advantages in market competition. Silica has a good advantage in this respect as a common material of matter. The organic combination of silicon dioxide and fluorine-containing silane is designed, and the hydrophobic and dustproof effects can be realized through simple, efficient and environment-friendly process treatment. This will drive its further marketable use. The material has important practical application value in the aspects of medical materials such as packaging bags, goggles, medical instruments, medical equipment and the like.
Disclosure of Invention
In view of the above-mentioned shortcomings in the prior art, according to embodiments of the present invention, it is desirable to provide a medical hygienic filling master batch with hydrophobic dustproof function, and to propose its use in medical packaging materials and medical device materials.
According to the embodiment, the medical sanitary hydrophobic dustproof function filling master batch provided by the invention is prepared by mixing a plastic base material and nano-function powder with the average particle size of less than or equal to 20nm, and then adding an auxiliary agent for granulation, wherein the addition amount of the nano-function powder is 5-20wt% of the filling master batch, and the addition amount of the auxiliary agent is 0.2-0.5wt% of the filling master batch, wherein: the plastic substrate is selected from polyethylene, polypropylene, polyvinyl chloride, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate, polystyrene and polycarbonate;
the nano functional powder is modified silicon-fluorine nano powder;
the auxiliary agent is a dispersant and an antioxidant, the addition amount of the dispersant is 0.1-0.2wt% of the filling master batch, and the addition amount of the antioxidant is 0.1-0.3wt% of the filling master batch; the dispersant is selected from hydroxyethyl ethylene bis stearamide, ethylene glycol polyoxyethylene ether and oleamide; the antioxidant is selected from the group consisting of pentaerythritol tetrakis- (dibutylhydroxyhydrocinnamate), dioctadecyl thiodipropionate, didodecyl thiodipropionate, dioctadecyl pentaerythritol diphosphite and tris (2, 4-di-tert-butylphenyl) phosphite.
According to an embodiment, the preparation process of the modified silicon fluoride nano powder in the medical sanitary hydrophobic dustproof functional filling master batch comprises the following steps:
(1) And (4) dynamic process. Putting 1 part by mass of silicon dioxide powder into a container containing 20-50 parts by mass of isopropanol, stirring and carrying out ultrasonic treatment for 3-6h, adding 0.5-2 parts by mass of polyethylene glycol, and putting the mixed solution into a high-speed rotating dispersing barrel containing zirconium balls for rolling ball milling for 3-5 days to obtain a powder dispersion liquid.
(2) A static process. Adding 0.5-1 part by mass of fluorosilane, 0.5-1 part by mass of siloxane and hydrochloric acid into the powder dispersion liquid, adjusting the pH to 4-6, stirring at constant temperature of 30-40 ℃, and performing ultrasonic treatment for 3-8h.
(3) Centrifugally separating the dispersion, repeatedly cleaning with ethanol for 3 times, and drying at 40-60 deg.C for 24-48 hr in oxygen-isolated manner to obtain modified silicon-fluorine nanopowder with average particle diameter of less than or equal to 20 nm.
Wherein, in the step (2), the fluorosilane is selected from perfluorooctyl triethoxysilane and heptadecafluorodecyl triethoxysilane; the siloxane is selected from the group consisting of methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, and gamma-aminopropyltriethoxysilane.
Namely, the hydrophobic dustproof nano functional powder is prepared by a dynamic and static process treatment and an oxygen isolation drying method.
The preparation process of the medical sanitary hydrophobic dustproof functional filling master batch is not special, and the medical sanitary hydrophobic dustproof functional filling master batch is prepared by blending and granulating modified silicon-fluorine nano powder with the average particle size of less than or equal to 20nm with a base material and an auxiliary agent, and can be widely applied to the fields of medical sanitary packaging materials, medical device materials and the like.
Compared with the prior art, the following embodiments and test examples prove that the medical sanitary hydrophobic dustproof functional filling master batch has the following advantages: the raw materials are simple and easy to obtain, the process flow is simple and convenient, and the environment is protected; the obtained master batch has strong applicability and can be widely applied to various plastic base materials; has good hydrophobic and dustproof effects.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. These examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure in any way whatsoever. After reading the description of the invention, one skilled in the art can make various changes and modifications to the invention, and such equivalent changes and modifications also fall into the scope of the invention defined by the claims.
The starting materials used in the following examples of the present invention are commercially available products unless otherwise specified.
Example 1
The modified silicon-fluorine nano powder is treated by the following processes:
adding 200g of silicon dioxide powder into 5L of isopropanol, stirring and carrying out ultrasonic treatment for 4 hours, adding 100g of polyethylene glycol, putting the mixed solution into a high-speed rotating dispersing barrel containing zirconium balls, and carrying out rolling ball milling for 4 days to obtain powder dispersion liquid.
(2) 100g of perfluorooctyl triethoxysilane and 120g of methyltriethoxysilane are added to the powder dispersion, the pH is adjusted to 5 with hydrochloric acid, and stirring and ultrasound are carried out at a constant temperature of 40 ℃ for 6 hours.
(3) Centrifugally separating the dispersion, repeatedly cleaning with ethanol for 3 times, and drying at 50 deg.C in the absence of oxygen for 24h to obtain modified silicon-fluorine nanopowder with average particle diameter of less than or equal to 20 nm.
200g of modified silicon fluoride nano powder, 800g of polyethylene terephthalate glycol plastic chips, 1.2g of ethylene glycol polyoxyethylene ether, 1g of pentaerythritol tetra- (dibutyl hydroxy hydrocinnamic acid) and 0.8g of tris (2, 4-di-tert-butylphenyl) phosphite. Adding into a plastic granulator under the condition of fully stirring to obtain the medical sanitary filling master batch.
Example 2
The modified silicon-fluorine nano powder is treated by the following processes:
adding 200g of silicon dioxide powder into 5L of isopropanol, stirring and carrying out ultrasonic treatment for 4 hours, adding 120g of polyethylene glycol, putting the mixed solution into a high-speed rotating dispersing barrel containing zirconium balls, and carrying out rolling ball milling for 5 days to obtain powder dispersion liquid.
(2) 100g of heptadecafluorodecyltriethoxysilane, 100g of vinyltrimethoxysilane and hydrochloric acid were added to the powder dispersion to adjust the pH to 4, and stirring and sonication were carried out at a constant temperature of 40 ℃ for 4 hours.
(3) Centrifugally separating the dispersion, repeatedly cleaning with ethanol for 3 times, and drying at 50 deg.C in the absence of oxygen for 24h to obtain modified silicon-fluorine nanopowder with average particle diameter of less than or equal to 20 nm.
200g of modified silicon-fluorine nano powder, 800g of polypropylene plastic slices, 1.2g of oleamide, 1.4g of pentaerythritol diphosphite dioctadecyl ester and 0.8g of thiodipropionic acid didodecanediol ester. Adding into a plastic granulator under the condition of fully stirring to obtain the medical sanitary filling master batch.
Example 3
The modified silicon-fluorine nano powder is treated by the following processes:
putting 200g of silicon dioxide powder into 5L of isopropanol, stirring and carrying out ultrasonic treatment for 5h, adding 140g of polyethylene glycol, putting the mixed solution into a high-speed rotating dispersing barrel containing zirconium balls, and carrying out rolling ball milling for 4 days to obtain powder dispersion liquid.
(2) 120g of perfluorooctyltriethoxysilane, 100g of methyltrimethoxysilane and hydrochloric acid were added to the powder dispersion to adjust the pH to 4, and stirring and sonication were carried out at a constant temperature of 40 ℃ for 4 hours.
(3) Centrifugally separating the dispersion, repeatedly cleaning with ethanol for 3 times, and drying at 50 deg.C in the absence of oxygen for 24h to obtain modified silicon-fluorine nanopowder with average particle diameter of less than or equal to 20 nm.
200g of modified silicon-fluorine nano powder, 800g of polyethylene plastic slice, 1.4g of hydroxyethyl ethylene bis stearamide, 1.3g of dioctadecyl thiodipropionate and 1g of tris (2, 4-di-tert-butylphenyl) phosphite. Adding into a plastic granulator under the condition of fully stirring to obtain the medical sanitary filling master batch.
Example 4
The modified silicon-fluorine nano powder is treated by the following processes:
adding 200g of silicon dioxide powder into 5L of isopropanol, stirring and carrying out ultrasonic treatment for 5 hours, adding 120g of polyethylene glycol, putting the mixed solution into a high-speed rotating dispersing barrel containing zirconium balls, and carrying out rolling ball milling for 5 days to obtain powder dispersion liquid.
(2) 100g of perfluorooctyl triethoxysilane, 120g of gamma-aminopropyltriethoxysilane and hydrochloric acid are added to the powder dispersion liquid to adjust the pH to 4, and stirring and ultrasonic processing are carried out at a constant temperature of 40 ℃ for 4 hours.
(3) Centrifugally separating the dispersion, repeatedly cleaning with ethanol for 3 times, and drying at 50 deg.C in the absence of oxygen for 24h to obtain modified silicon-fluorine nanopowder with average particle diameter of less than or equal to 20 nm.
200g of modified silicon-fluorine nano powder, 800g of polybutylene terephthalate plastic slice, 1.4g of oleamide, 1.2g of ditridecyl thiodipropionate and 0.9g of dioctadecyl pentaerythritol diphosphite. Adding into a plastic granulator under the condition of fully stirring to obtain the medical sanitary filling master batch.
Example 5
The modified silicon-fluorine nano powder is treated by the following processes:
adding 200g of silicon dioxide powder into 5L of isopropanol, stirring and carrying out ultrasonic treatment for 5h, adding 100g of polyethylene glycol, putting the mixed solution into a high-speed rotating dispersing barrel containing zirconium balls, and carrying out rolling ball milling for 4 days to obtain powder dispersion liquid.
(2) 100g of perfluorooctyl triethoxysilane and 120g of methyltriethoxysilane are added to the powder dispersion, the pH is adjusted to 5 with hydrochloric acid, and stirring and ultrasonic treatment are carried out at a constant temperature of 40 ℃ for 4 hours.
(3) Centrifugally separating the dispersion, repeatedly cleaning with ethanol for 3 times, and drying at 50 deg.C in the absence of oxygen for 24h to obtain modified silicon-fluorine nanopowder with average particle diameter of less than or equal to 20 nm.
200g of modified silicon-fluorine nano powder, 800g of polycarbonate plastic slice, 1.2g of hydroxyethyl ethylene bis stearamide, 1.2g of ditridecyl thiodipropionate and 0.8g of dioctadecyl pentaerythritol diphosphite. Adding into a plastic granulator under the condition of fully stirring to obtain the medical sanitary filling master batch.
Test examples
The medical sanitary filling master batch prepared in each embodiment is blended and extruded with the corresponding base material master batch according to the mass ratio of 5%, a film with the thickness of 50 mu m is prepared by adopting a biaxial stretching process, and the hydrophobic and oleophobic properties of the film are tested. The test results are shown in table 1. It can be seen that the drainage angle can be 123 °, the oil drainage angle can be 91 °; the sample has very low surface energy, which is beneficial to exerting the hydrophobic and dustproof effect and keeping the surface dry and clean. The medical sanitary filling master batch prepared by the invention has good hydrophobic and dustproof performance, the process conditions adopted during preparation are simple, convenient, efficient, green and environment-friendly, the applicability is wide, and the medical sanitary filling master batch has important practical application value in the aspects of medical materials such as packaging bags, goggles, medical instruments, medical equipment and the like.
TABLE 1 results of property measurements of samples prepared in examples
Claims (4)
1. The medical sanitary hydrophobic dustproof filling master batch is characterized in that the filling master batch is prepared by mixing a plastic base material and nano functional powder with the average grain diameter of less than or equal to 20nm, adding an auxiliary agent and granulating, wherein the adding amount of the nano functional powder is 5-20wt% of the filling master batch, the adding amount of the auxiliary agent is 0.2-0.5wt% of the filling master batch,
the plastic substrate is selected from polyethylene, polypropylene, polyvinyl chloride, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate, polystyrene and polycarbonate;
the nano functional powder is modified silicon-fluorine nano powder;
the auxiliary agent is a dispersant and an antioxidant, the addition amount of the dispersant is 0.1-0.2wt% of the filling master batch, and the addition amount of the antioxidant is 0.1-0.3wt% of the filling master batch; the dispersant is selected from hydroxyethyl ethylene bis stearamide, ethylene glycol polyoxyethylene ether and oleamide; the antioxidant is selected from the group consisting of pentaerythritol tetrakis- (dibutylhydroxyhydrocinnamate), dioctadecyl thiodipropionate, didodecyl thiodipropionate, dioctadecyl pentaerythritol diphosphite and tris (2, 4-di-tert-butylphenyl) phosphite.
2. The medical sanitary hydrophobic dustproof filling master batch according to claim 1, wherein the preparation process of the modified silicon-fluorine nano powder comprises the following steps:
(1) Dynamic process: putting 1 part by mass of silicon dioxide powder into a container containing 20-50 parts by mass of isopropanol, stirring and carrying out ultrasonic treatment for 3-6 hours, adding 0.5-2 parts by mass of polyethylene glycol, and putting the mixed solution into a high-speed rotating dispersion barrel containing zirconium balls for rolling ball milling for 3-5 days to obtain a powder dispersion liquid;
(2) Static process: adding 0.5-1 part by mass of fluorosilane and 0.5-1 part by mass of siloxane into the powder dispersion liquid, adjusting the pH to 4-6 with hydrochloric acid, stirring at constant temperature of 30-40 ℃, and performing ultrasonic treatment for 3-8 hours;
(3) Centrifugally separating the dispersion, repeatedly cleaning with ethanol for 3 times, and drying at 40-60 deg.C for 24-48 hr in oxygen-isolated manner to obtain modified silicon-fluorine nanopowder with average particle diameter of less than or equal to 20 nm.
3. The hydrophobic dust-proof filling master batch for medical use according to claim 2, wherein in the step (2), the fluorosilane is selected from the group consisting of perfluorooctyltriethoxysilane and heptadecafluorodecyltriethoxysilane; the siloxane is selected from the group consisting of methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, and gamma-aminopropyltriethoxysilane.
4. Use of the hydrophobic dustproof filling master batch for medical hygiene according to any one of claims 1 to 3 in medical packaging materials and medical device materials.
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| CN107987317A (en) * | 2017-12-22 | 2018-05-04 | 北京化工大学 | A kind of preparation method of uvioresistant powder, master batch and PET uvioresistant function fibers |
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