CN111087655A - Self-repairing konjac glucomannan mobile phone tempered film and preparation method thereof - Google Patents
Self-repairing konjac glucomannan mobile phone tempered film and preparation method thereof Download PDFInfo
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- C08F214/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
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- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
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- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
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- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
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- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
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- C08J2327/00—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 at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—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 at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—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 at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- C08J2327/02—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 at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—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 at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/20—Homopolymers or copolymers of hexafluoropropene
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- C08J2335/00—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 at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Derivatives of such polymers
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Abstract
The invention relates to a self-repairing konjac glucomannan mobile phone toughened film and a preparation method thereof. The invention fully utilizes the characteristics of excellent plasticity, safety and biodegradability of the konjac glucomannan, and the prepared mobile phone toughened film has the advantages of good safety and high tensile strength, and has the advantages of simple preparation process, convenient material acquisition, low cost, degradability and the like, thereby being a green and environment-friendly product, and the safety and reliability of the product meet the requirements of national relevant standards. The nonmetal and non-glass mobile phone toughened film is prepared by utilizing the konjac glucomannan and the high molecular polymer, the service life and the safety of the mobile phone toughened film are greatly improved, and if the toughened film is broken, a consumer can slowly repair the mobile phone toughened film by self only irradiating the toughened film with an ultraviolet lamp or sunlight.
Description
Technical Field
The invention relates to a daily life entertainment product and a preparation method thereof, in particular to a self-repairing konjac glucomannan mobile phone toughened film and a preparation method thereof.
Background
At present, due to the continuous change of the demands of consumers, the screen of the smart phone becomes larger gradually, and meanwhile, the mobile phone toughened film inevitably generates damage and microcracks in the using process, and thus macroscopic cracks are caused to break. If we can repair the early damage of the toughened film, the method has important significance for eliminating potential safety hazards, enhancing the strength and toughness of the toughened film and prolonging the service life.
The self-repairing can automatically repair when an object is cracked or damaged just like the skin repairing capability of a human body. Energy is provided by heating, illumination and the like, and the repairing is realized by the action of film forming or crosslinking and the like. Based on the mechanism, self-repairing technology is applied in various fields. When the toughened film is broken, the self-repairing of materials in the toughened film is promoted by ultraviolet rays only through sunlight irradiation, and meanwhile, the self-repairing and healing of the mobile phone toughened film are assisted by the interaction of the polar extensible polymer and salt ions, so that the toughened film has great practical value while having innovativeness.
The use of chemical substances which are not beneficial to environmental protection causes much environmental pollution, the bioavailability is very low, the degradability is poor, the environmental burden is easy to cause, and the method is contrary to the current sustainable development concept, so that the method for preparing the mobile phone toughened film by utilizing the natural high-molecular polysaccharide has the characteristics of high bioavailability, strong degradability and the like, and has great significance.
The patent with the application number of 201711394210.3, namely 'a fall-resistant mobile phone toughened film' (application date: 2017.12.21), designs the fall-resistant mobile phone toughened film. The raw materials comprise disodium ethylene diamine tetraacetate, potassium dichromate, borax decahydrate, aluminum hydroxide, tetraethoxysilane, superfine PMMA powder, ferric oxide and the like. The formula of the toughened film gives consideration to the requirements of various manufacturing links on the glass performance in the glass production process and the requirements of users on the glass physical and chemical performance, and greatly reduces the absorption of glass on light heating and the like. However, the mobile phone toughened film of the invention has no self-repairing function, most of the used materials are chemical substances, a large amount of pollutants are not generated in the manufacturing process, and the recovery rate is low.
The patent with application number 201810224734.6, "a mobile phone toughened film glass material" (application date: 2018.03.19), designs a mobile phone toughened film material. The raw materials comprise: cyclopropene resin, silicon dioxide, silica gel, chlorinated polyethylene, ethylene, alumina, potassium permanganate, manganese dioxide, barium sulfate, aluminum oxide, calcium hexaluminate, sodium oxalate and the like. The toughened film avoids the problem that the mass is increased due to the fact that the screen is too large, and the mobile phone is light; the mechanical strength and the hardness of the screen glass are improved. However, the mobile phone toughened film has no self-repairing function, uses excessive chemical substances, and has low recovery rate and unsatisfactory flexibility.
Disclosure of Invention
The invention aims to provide a self-repairing konjac glucomannan mobile phone toughened film and a preparation method thereof. Meanwhile, the ductility of the mobile phone toughened film is enhanced by utilizing the interaction of the polar extensible polymer, and the self-repairing and healing of the mobile phone toughened film are assisted.
The invention discloses a preparation method of a self-repairing konjac glucomannan mobile phone toughened film, which is characterized by comprising the following preparation steps:
(1) preparing konjac glucomannan solution: according to the mass components, taking 14-18 parts of konjac glucomannan, dissolving in 500-700 parts of deionized water with the water temperature of 50-60 ℃, stirring for 1-2 hours by using a magnetic stirrer with the stirring speed of 300-400 r/min, and centrifugally degassing to obtain a konjac glucomannan solution for later use;
(2) preparation of polymer sol solution: adding 60-80 parts of acrylamide, 1-10 parts of ammonium persulfate, 4-12 parts of N, N' -methylene bisacrylamide and 60-80 parts of 3-propyl methacrylate sulfonate into 800-1200 parts of deionized water for dissolving, stirring for 10-20 min in an ice bath at the rotating speed of a magnetic stirrer of 400-500 r/min to obtain a polymer sol solution;
(3) preparation of extended copolymer: uniformly mixing 4-12 parts of vinylidene fluoride, 4-12 parts of hexafluoropropylene and 2-6 parts of carbonate to obtain an extended copolymer liquid;
(4) preparing a toughening film precursor liquid: uniformly mixing the konjac glucomannan solution obtained in the step (1), the polymer sol solution obtained in the step (2) and the extended copolymer solution obtained in the step (3), and then placing the mixture in a centrifuge with the speed of 3000-5000 r/min for degassing treatment for 30-50 min to obtain a toughened film precursor solution;
(5) pressing and forming a mobile phone tempering film: injecting the toughened film precursor liquid obtained in the step (4) into a mobile phone toughened film mold to enable the toughened film precursor liquid to be uniformly distributed, enabling the liquid level height to be 1.8-2.2 mm, placing the toughened film precursor liquid and the mold into an ultraviolet lamp chamber, radiating for 12-24 hours, and then taking out to obtain a formed mobile phone toughened film;
(6) detection, disinfection and packaging: and (5) detecting, disinfecting, sterilizing and packaging the mobile phone toughened film formed in the step (5), thus obtaining the self-repairing konjac glucomannan mobile phone toughened film finished product.
The invention has the following advantages: the preparation method of the self-repairing konjac glucomannan mobile phone toughened film fully utilizes the characteristics of excellent plasticity, safety and biodegradability of konjac glucomannan, and the prepared mobile phone toughened film has the advantages of good safety and high tensile strength, and has simple preparation process, rich raw materials and low cost. The product has the advantages of self-repairing and degradability, and is a green and environment-friendly product. The methacrylic acid 3-sulfonic acid propyl ester salt and polyacrylamide have charge effect and photoinitiation functions, and also have the characteristics of thickening, gelatinization, moisture absorption, adhesion and film forming property. The konjac glucomannan improves the stability and viscosity of the aqueous solution of the single polymer and increases the bioavailability. In addition, the addition of the vinylidene fluoride and the hexafluoropropylene in the raw materials enhances the ductility of the mobile phone toughened film, assists the self-repair of the toughened film and is beneficial to maintaining the shape of the toughened film. After the raw materials are mixed, the solution is irradiated by ultraviolet rays, and cross-linking reaction occurs between molecules, so that the performance of the product is greatly improved.
Compared with the commercially available mobile phone toughened film, the self-repaired konjac glucomannan mobile phone toughened film disclosed by the invention is of a non-metal and non-glass texture, the daily-used mobile phone toughened film is prepared by using konjac glucomannan and a high polymer, the service life and the safety of the mobile phone toughened film are greatly improved, and meanwhile, the self-repairing characteristic of the konjac glucomannan mobile phone toughened film is undoubtedly a good news for families, and once the toughened film is broken, a consumer can slowly repair the toughened film only by using an ultraviolet lamp or sunlight.
The results of the self-repairing konjac glucomannan mobile phone toughened film of the invention and the commercially available mobile phone toughened film are shown in table 1.
TABLE 1 comparison of self-healing Konjac glucomannan mobile phone toughened films with commercially available mobile phone toughened films
Detailed Description
In order to fully disclose the self-repairing konjac glucomannan mobile phone toughened film and the preparation method thereof, the following embodiment is combined for explanation.
Embodiment 1, a method for preparing a self-healing konjac glucomannan mobile phone tempered film, comprising the following steps:
(1) preparing konjac glucomannan solution: according to the mass components, 14 parts of konjac glucomannan are taken and dissolved in 500 parts of deionized water with the water temperature of 50 ℃, a magnetic stirrer with the stirring speed of 300 r/min is used for stirring for 1 hour, and centrifugal degassing is carried out for standby;
(2) preparation of polymer sol solution: adding 60 parts of acrylamide, 1 part of ammonium persulfate, 4 parts of N, N' -methylene bisacrylamide and 60 parts of 3-propyl methacrylate sulfonate into 800 parts of deionized water for dissolving, adjusting the rotating speed of a magnetic stirrer to 400 r/min, and stirring in an ice bath for 10min to obtain a polymer sol solution;
(3) preparation of extended copolymer: uniformly mixing 4 parts of vinylidene fluoride, 4 parts of hexafluoropropylene and 2 parts of carbonate to generate copolymerization reaction to obtain an extended copolymer liquid;
(4) preparing a toughening film precursor liquid: uniformly mixing the konjac glucomannan solution obtained in the step (1), the polymer sol solution obtained in the step (2) and the extended copolymer solution obtained in the step (3), and then placing the mixture in a centrifuge with the speed of 3000 r/min for degassing for 30min to obtain a toughened membrane precursor solution;
(5) pressing and forming a mobile phone tempering film: injecting the toughened film precursor liquid obtained in the step (4) into a mobile phone toughened film mold to ensure that the toughened film precursor liquid is uniformly distributed, the liquid level height is 1.8 mm, placing the toughened film precursor liquid and the mold in an ultraviolet lamp chamber, performing concentrated radiation for 12h, performing automatic chemical crosslinking forming, and then taking out to obtain a formed mobile phone toughened film;
(6) detection, disinfection and packaging: and (5) further sterilizing and packaging the mobile phone toughened film formed in the step (5), thus obtaining the self-repairing konjac glucomannan mobile phone toughened film finished product.
Embodiment 2, a method for preparing a self-healing konjac glucomannan mobile phone tempered film, comprising the following steps:
(1) preparing konjac glucomannan solution: according to the mass components, 16 parts of konjac glucomannan are taken and dissolved in 600 parts of deionized water with the water temperature of 55 ℃, a magnetic stirrer with the stirring speed of 350 r/min is used for stirring for 1.5 hours, and centrifugal degassing is carried out for standby;
(2) preparation of polymer sol solution: adding 70 parts of acrylamide, 5 parts of ammonium persulfate, 8 parts of N, N' -methylene bisacrylamide and 70 parts of methacrylic acid 3-sulfonic acid propyl ester salt into 1000 parts of deionized water for dissolution, and stirring for 15min in an ice bath at the rotating speed of a magnetic stirrer of 450 r/min to obtain a polymer sol solution;
(3) preparation of extended copolymer: uniformly mixing 8 parts of vinylidene fluoride, 8 parts of hexafluoropropylene and 4 parts of carbonate to generate copolymerization reaction to obtain an extended copolymer liquid;
(4) preparing a toughening film precursor liquid: uniformly mixing the konjac glucomannan solution obtained in the step (1), the polymer sol solution obtained in the step (2) and the extended copolymer solution obtained in the step (3), and then placing the mixture in a centrifugal machine at 4000 r/min for degassing treatment for 40min to obtain a toughened membrane precursor solution;
(5) pressing and forming a mobile phone tempering film: injecting the toughened film precursor liquid obtained in the step (4) into a mobile phone toughened film mold to ensure that the toughened film precursor liquid is uniformly distributed, the liquid level height is 2.0 mm, placing the toughened film precursor liquid and the mold in an ultraviolet lamp chamber, performing concentrated radiation for 18h, performing automatic chemical crosslinking forming, and then taking out to obtain a formed mobile phone toughened film;
(6) detection, disinfection and packaging: and (5) further sterilizing and packaging the mobile phone toughened film formed in the step (5), thus obtaining the self-repairing konjac glucomannan mobile phone toughened film finished product.
Embodiment 3, a method for preparing a self-healing konjac glucomannan mobile phone tempered film, comprising the following steps:
(1) preparing konjac glucomannan solution: according to the mass components, 18 parts of konjac glucomannan are taken and dissolved in 700 parts of deionized water with the water temperature of 60 ℃, a magnetic stirrer with the stirring speed of 400 r/min is used for stirring for 2 hours, and centrifugal degassing is carried out for standby;
(2) preparation of polymer sol solution: adding 80 parts of acrylamide, 10 parts of ammonium persulfate, 12 parts of N, N' -methylene bisacrylamide and 80 parts of 3-propyl methacrylate sulfonate into 1200 parts of deionized water for dissolution, and stirring for 20min in an ice bath at the rotating speed of a magnetic stirrer of 500 r/min to obtain a polymer sol solution;
(3) preparation of extended copolymer: uniformly mixing 12 parts of vinylidene fluoride, 12 parts of hexafluoropropylene and 6 parts of carbonate to generate copolymerization reaction to obtain an extended copolymer liquid;
(4) preparing a toughening film precursor liquid: uniformly mixing the konjac glucomannan solution obtained in the step (1), the polymer sol solution obtained in the step (2) and the extended copolymer solution obtained in the step (3), and then placing the mixture in a centrifugal machine with the speed of 5000 r/min for degassing treatment for 50min to obtain a toughened membrane precursor solution;
(5) pressing and forming a mobile phone tempering film: injecting the toughened film precursor liquid obtained in the step (4) into a mobile phone toughened film mold to ensure that the toughened film precursor liquid is uniformly distributed, the liquid level height is 2.2 mm, placing the toughened film precursor liquid and the mold in an ultraviolet lamp chamber, performing concentrated radiation for 24 hours, performing automatic chemical crosslinking forming, and then taking out to obtain a formed mobile phone toughened film;
(6) detection, disinfection and packaging: and (5) further sterilizing and packaging the mobile phone toughened film formed in the step (5), thus obtaining the self-repairing konjac glucomannan mobile phone toughened film finished product.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (5)
1. A preparation method of a self-repairing konjac glucomannan mobile phone toughened film is characterized by comprising the following preparation steps:
preparing konjac glucomannan solution: according to the mass components, taking 14-18 parts of konjac glucomannan, dissolving in 500-700 parts of deionized water with the water temperature of 50-60 ℃, stirring for 1-2 hours by using a magnetic stirrer, and centrifugally degassing to obtain a konjac glucomannan solution for later use;
preparation of polymer sol solution: adding 60-80 parts of acrylamide, 1-10 parts of ammonium persulfate, 4-12 parts of N, N' -methylene bisacrylamide and 60-80 parts of 3-propyl methacrylate sulfonate into 800-1200 parts of deionized water, dissolving, and stirring for 10-20 min in an ice bath by using a magnetic stirrer to obtain a polymer sol solution;
(3) preparation of extended copolymer: uniformly mixing 4-12 parts of vinylidene fluoride, 4-12 parts of hexafluoropropylene and 2-6 parts of carbonate to obtain an extended copolymer liquid;
(4) preparing a toughening film precursor liquid: uniformly mixing the konjac glucomannan solution obtained in the step (1), the polymer sol solution obtained in the step (2) and the extended copolymer solution obtained in the step (3), and then placing the mixture in a centrifuge for degassing treatment for 30-50 min to obtain a toughened film precursor solution;
(5) pressing and forming a mobile phone tempering film: injecting the toughened film precursor liquid obtained in the step (4) into a mobile phone toughened film mold to enable the toughened film precursor liquid to be uniformly distributed, enabling the liquid level height to be 1.8-2.2 mm, placing the toughened film precursor liquid and the mold into an ultraviolet lamp chamber, radiating for 12-24 hours, and then taking out to obtain a formed mobile phone toughened film;
(6) detection, disinfection and packaging: and (5) detecting, disinfecting, sterilizing and packaging the mobile phone toughened film formed in the step (5), thus obtaining the self-repairing konjac glucomannan mobile phone toughened film finished product.
2. The method for preparing the self-repairing konjac glucomannan mobile phone toughened film according to claim 1, wherein the stirring speed of the magnetic stirrer used in the step (1) is 300-400 r/min.
3. The method for preparing the self-repairing konjac glucomannan mobile phone toughened film according to claim 1, wherein the step (2) is carried out in an ice bath by using a magnetic stirrer, and the rotating speed of the magnetic stirrer is 400-500 r/min.
4. The preparation method of the self-repairing konjac glucomannan mobile phone toughened film according to claim 1, wherein the step (4) of degassing is carried out in a centrifuge, and the rotation speed of the centrifuge is 3000-5000 r/min.
5. A self-healing Konjac glucomannan cell phone toughened film prepared by any one of the methods of claims 1-4.
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