CN111763446B - Strippable hydrogel for removing surface pollutants - Google Patents

Strippable hydrogel for removing surface pollutants Download PDF

Info

Publication number
CN111763446B
CN111763446B CN202010630656.7A CN202010630656A CN111763446B CN 111763446 B CN111763446 B CN 111763446B CN 202010630656 A CN202010630656 A CN 202010630656A CN 111763446 B CN111763446 B CN 111763446B
Authority
CN
China
Prior art keywords
solution
hydrogel
pollutants
hydrogel film
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010630656.7A
Other languages
Chinese (zh)
Other versions
CN111763446A (en
Inventor
曹美文
姚明宇
沈阳
位强
田蓓
杜洪龙
张宇欣
丁榛
王生杰
夏永清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Petroleum East China
Original Assignee
China University of Petroleum East China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China University of Petroleum East China filed Critical China University of Petroleum East China
Priority to CN202010630656.7A priority Critical patent/CN111763446B/en
Publication of CN111763446A publication Critical patent/CN111763446A/en
Application granted granted Critical
Publication of CN111763446B publication Critical patent/CN111763446B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D105/00—Coating compositions based on polysaccharides or on their derivatives, not provided for in groups C09D101/00 or C09D103/00
    • C09D105/04—Alginic acid; Derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0014—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by incorporation in a layer which is removed with the contaminants
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/20—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for coatings strippable as coherent films, e.g. temporary coatings strippable as coherent films
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic

Abstract

The invention discloses a preparation method and application of hydrogel for removing pollutants on the surface of a base material, and belongs to the field of environmental protection. Coating Sodium Alginate (SA) water solution with concentration of 1-4 wt% on the surface of the contaminated substrate, and uniformly spraying calcium chloride (CaCl) with concentration of 1-4 wt% on the surface2) A solution to promote crosslinking of the SA component to form a hydrogel film. The surface contaminants can enter the hydrogel film by means of dissolution, adsorption and the like, and then the hydrogel film is peeled off from the surface, so that the effective removal of the contaminants on the surface of the substrate is realized. Meanwhile, active adsorption components such as Graphene Oxide (GO) or Ethylene Diamine Tetraacetic Acid (EDTA) and the like can be added into the SA solution to be mixed to prepare a uniformly dispersed thick solution, and then the surface of the thick solution is coated and CaCl is sprayed2The solution is induced to form a hydrogel film, and the removal effect of the hydrogel film on pollutants is improved by utilizing the strong adsorption effect provided by GO or EDTA.

Description

Strippable hydrogel for removing surface pollutants
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to preparation of a strippable hydrogel and application of the strippable hydrogel in surface pollutant removal. Coating Sodium Alginate (SA) water solution with concentration of 1-4 wt% on the surface of the contaminated substrate, and uniformly spraying calcium chloride (CaCl) with concentration of 1-4 wt% on the surface2) A solution to promote crosslinking of the SA component to form a hydrogel film. The surface pollutant can be dissolved and adsorbedAnd the like into the hydrogel film, and then peeling the hydrogel film from the surface, can effectively remove contaminants from the substrate surface. Meanwhile, active adsorption components such as Graphene Oxide (GO) or Ethylene Diamine Tetraacetic Acid (EDTA) and the like can be added into the SA solution to improve the removal effect of the hydrogel film on pollutants. The process utilizes the hydrophilicity of the SA and the complexing action, the hydrogen bond action, the electrostatic action, the pi-pi action and the like of the active adsorption component and the pollutants on the surface of the base material to dissolve and adsorb the pollutants, and then the hydrogel film is stripped from the surface of the base material, so that the pollutants on the surface of the base material can be conveniently and efficiently removed.
Background
In the last 80 th century, strippable coatings have been developed rapidly and their practical use has become more and more widespread. First, the strippable coatings can be used for instrument equipment protection, protecting surfaces from scratches, bruises, abrasions, and the like during shipping, storage, and assembly. Secondly, in the process of storing the equipment and instruments, the surfaces of the equipment and instruments are easily corroded by microorganisms, oil stains, moisture and the like, so that the surfaces are chemically corroded, the performance is reduced, even the equipment and instruments are failed to be discarded, and the strippable coating can play a good protection role. Furthermore, in hospitals, laboratories, pharmaceutical factories, nuclear facilities and the like, there are many contaminations on the surfaces of instruments and devices caused by the deposition of harmful substances, which are potential threats to practitioners. However, for various reasons, these surfaces are often not cleaned with large amounts of solution, resulting in difficult cleaning and time and labor consuming decontamination. For example, for precision electronic equipment, the removal of surface contaminants is a difficult problem, and the equipment is affected by improper methods and even damaged. Therefore, for such surface contamination, it is of great importance to develop a convenient and efficient decontamination method.
At present, various methods for treating pollutants on the surface of an object exist, but most methods have small application range and higher cost, and are not suitable for large-scale application. The adsorption method is an effective pollutant treatment method and is widely used for treating pollutants in water, but the research on removing the pollutants on the surface of an object is less, and the method is mainly limited by the preparation of a suitable strippable surface adsorption film.
The invention mainly provides a preparation method and application of a strippable surface decontamination hydrogel. The method comprises coating SA solution or SA mixed solution added with active adsorption component GO or EDTA on the surface, and spraying CaCl on the surface2The solution induces the cross-linking of SA molecules to form a hydrogel film in situ, and the hydrogel film is peeled from the surface of the substrate after the surface pollutants are dissolved and adsorbed in the hydrogel film, so that the convenient and efficient removal of the pollutants on the surface of the substrate is realized.
The invention has the following outstanding advantages: (1) the materials used in the invention are environment-friendly and nontoxic, and have high safety; (2) the invention coats the surface to form a film in a solution mode, the fluidity of the solution enables the surface shape to have self-adaptability, and the invention can well cover the uneven surface to form a hydrogel film which is tightly attached; (3) the invention has the outstanding advantages of fast film forming, easy stripping and low cost; (4) the invention utilizes the hydrophilicity of SA and the interaction of active adsorption components and surface pollutants to dissolve and adsorb the pollutants, concentrates the pollutants on the surface of an object into hydrogel under the action similar to 'enrichment', and has good decontamination effect; (5) the hydrogel film can be completely stripped from the surface and collected in a centralized manner, so that the next step of unified treatment of pollutants is facilitated. In conclusion, the invention can realize quick decontamination, has the characteristics of strong adaptability, small harm to the environment and the like, and is a novel material with wide application prospect.
Disclosure of Invention
The invention provides a preparation method of a strippable hydrogel and application thereof in removing surface pollutants, which comprises the following steps:
(1) preparing an SA solution or an SA thick solution added with an active adsorption component GO or EDTA, wherein the concentrations of various components in the prepared solution are respectively as follows: GO is 0.1-1.5 mg/mL (or EDTA is 1-25 mg/mL), and sodium alginate is 1-4 wt%.
(2) Coating the solution on the surface of a polluted substrate, and spraying the prepared CaCl with a certain concentration (1-4 wt%) (in parts by weight)2Solution, forming a peelable film, drying after film formationThe contaminants on the surface of the substrate can be removed by drying and stripping.
Preferably, the GO in the step (1) has a concentration of 0.2-1.0 mg/mL, an EDTA concentration of 5-15 mg/mL and an SA concentration of 2-3 wt%, and GO is uniformly dispersed by using vortex ultrasound.
Preferably, CaCl is used in the step (2)2The concentration of the solution is 2-3 wt%.
Preferably, in the step (2), the GO (or EDTA)/SA mixed thick solution is coated on the surface of the substrate, and then CaCl is added2The solution is sprayed on the surface of the coating to form a film.
Preferably, the film in the step (2) is peeled after being dried.
The strippable decontamination hydrogel is used for removing pollutants on the surface of a base material and has high removal efficiency. Compared with the prior art, the invention has the following advantages: (1) the invention has the characteristics of high film forming speed, easy peeling, good decontamination effect and the like; (2) the material used by the invention is safe, nontoxic and environment-friendly; (3) the method for removing the pollutants on the surface of the base material has simple process, strong operability and high efficiency; (4) the invention coats the surface to form a film in a solution mode, the fluidity of the solution enables the surface shape to have self-adaptability, and the polluted surface can be uniformly coated, so that the surface can be well jointed without depending on the shape of a substrate; (5) the invention has universality and can treat organic matter pollution, radioactive nuclide and heavy metal ion pollution on the surfaces of plastics, glass, metal materials and the like. .
Drawings
FIG. 1 is a standard curve of rhodamine B in example 1 of the present invention.
FIG. 2 is a UV absorption spectrum of the concentration of rhodamine B on the substrate surface in example 1 of the present invention.
FIG. 3 shows the peeling of the peelable films prepared on the surfaces of different substrates in example 1 of the present invention
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
(1) preparing 50.0mg/L rhodamine B standard stock solution.
(2) Drawing a rhodamine B standard curve: preparing a standard solution of rhodamine B with the concentration of 0, 1, 2, 4, 6, 10, 12, 15 and 25mg/L, measuring the absorbance of the standard solution at 554nm by using an ultraviolet spectrophotometer, and drawing a standard curve.
(3) 15mL of rhodamine B solution with the concentration of 50.0mg/L is accurately sucked into the culture dish by a pipette gun, and the rhodamine B solution is poured into a plastic culture dish to be dried to simulate pollutants on the surface of the substrate.
(4) Uniformly coating a 3 wt% SA solution doped with 1mg/mL GO in a culture dish with pollutants on the surface, and spraying 3 wt% CaCl2The solution is placed on the GO/SA mixed solution, and is kept stand for 12 hours after film formation.
(5) And (3) after drying, removing the film, putting 5mL of pure water into a plastic culture dish, dissolving the unadsorbed rhodamine B in the culture dish, measuring the light absorption value at 554nm by using an ultraviolet spectrophotometer, and calculating the adsorption quantity according to the previously measured rhodamine B standard curve.
Through detection, when the total content of rhodamine in a plastic culture dish is 750mg, after the rhodamine B is treated by using the strippable coating, the residual amount of rhodamine B on the surface of the base material is 3.9715mg, and the adsorption efficiency reaches 99.471%.
Example 2:
(1) preparing 50.0mg/L methylene blue standard stock solution.
(2) Drawing a methylene blue standard curve: preparing a standard solution of methylene blue with the concentration of 0, 1, 2, 3, 6, 8 and 10mg/L, measuring the absorbance of the standard solution at 664nm by using an ultraviolet spectrophotometer, and drawing a standard curve.
(3) 15mL of methylene blue solution with a concentration of 50.0mg/L was accurately pipetted into a petri dish using a pipette, and poured into a plastic petri dish to dry, simulating contaminants on the surface of the substrate.
(4) Uniformly coating a 3 wt% SA solution doped with 1mg/mL GO in a culture dish with pollutants on the surface, and spraying 3 wt% CaCl2The solution is placed on the GO/SA mixed solution, and is kept stand for 12 hours after film formation.
(5) And (3) removing the film after drying, putting 5mL of pure water into a plastic culture dish, dissolving methylene blue which is not adsorbed in the culture dish, measuring the light absorption value of the culture dish at 664nm by using an ultraviolet spectrophotometer, and calculating the adsorption quantity according to the previously measured methylene blue standard curve.
(6) Through detection, when the total content of methylene blue in a plastic culture dish is 750mg, the residual amount of the methylene blue on the surface of the base material is 1.1428mg after the treatment by using the strippable coating, and the adsorption efficiency reaches 99.848%.
Example 3:
(1) preparing 50.0mg/L of malachite green standard stock solution.
(2) And (3) drawing a malachite green standard curve: preparing a standard solution of malachite green with the concentrations of 0, 1, 2.5, 5, 7.5 and 10mg/L, measuring the absorbance at 619nm by using an ultraviolet spectrophotometer, and drawing a standard curve.
(3) 15mL of malachite green solution with a concentration of 50.0mg/L is precisely sucked into the culture dish by a pipette, and the solution is poured into a plastic culture dish to be dried to simulate pollutants on the surface of the substrate.
(4) Uniformly coating a 3 wt% SA solution doped with 1mg/mL GO in a culture dish with pollutants on the surface, and spraying 3 wt% CaCl2The solution is placed on the GO/SA mixed solution, and is kept stand for 12 hours after film formation.
(5) And (3) removing the film after drying, putting 5ml of pure water into a plastic culture dish, dissolving the malachite green which is not adsorbed in the culture dish, measuring the absorbance value at 619nm by using an ultraviolet spectrophotometer, and calculating the adsorption quantity according to the malachite green standard curve measured before.
(6) Through detection, when the total content of the malachite green in the plastic culture dish is 750mg, the residual amount of the malachite green on the surface of the base material is 8.1351mg after the treatment by the strippable coating, and the adsorption efficiency reaches 98.915%.
Example 4:
(1) preparing 1.0g/mL standard stock solution of the strontium ion mimic nuclide.
(2) The cover glass is cleaned by an ultrasonic cleaning machine and dried by nitrogen.
(3) Accurately sucking 50 μ L of 1.0g/mL strontium ion mimic nuclide solution onto a cover glass with a pipette, placing the cover glass into a culture dish, drying the mimic solution, and simulating pollutants on the surface of the substrate
(4) Uniformly coating a 3 wt% SA solution doped with 10mg/mL EDTA on a cover glass with pollutants on the surface, and spraying 3 wt% CaCl2The solution was placed on the EDTA/SA mixed solution, and left to stand for 12 hours after film formation.
(5) And after drying, removing the film, putting the cover glass into a beaker filled with ultrapure water, performing ultrasonic treatment to dissolve the unadsorbed mimic nuclide in the water, measuring the concentration of strontium in the water by using atomic absorption spectroscopy, and calculating the adsorption quantity.
(6) Through detection, when the total content of the strontium ion mimic nuclide in the cover glass is 0.05mg, the residual amount of the strontium ion mimic nuclide on the surface of the base material is 0.00013mg after treatment by using the strippable coating, and the adsorption efficiency reaches 99.55%.

Claims (2)

1. A method for removing contaminants from a surface of a substrate, comprising the steps of:
(1) preparing a sodium alginate thick solution added with an active adsorption component GO, wherein the prepared thick solution comprises the following components in concentration: 3 wt% of sodium alginate and 1mg/mL of GO;
(2) coating the thick solution on the surface of a polluted substrate, and then uniformly spraying 3 wt% of CaCl on the surface2The solution is used for inducing in-situ crosslinking of sodium alginate to convert the solution into a hydrogel film, and the hydrogel is cured stably and surface pollutants are dissolved and adsorbed;
(3) and after drying, the hydrogel film is taken off from the surface of the base material, so that the pollutants on the surface of the base material can be conveniently removed.
2. A method for removing contaminants from the surface of a substrate according to claim 1, wherein the contaminants are heavy metal ions, organic contaminants.
CN202010630656.7A 2020-07-03 2020-07-03 Strippable hydrogel for removing surface pollutants Active CN111763446B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010630656.7A CN111763446B (en) 2020-07-03 2020-07-03 Strippable hydrogel for removing surface pollutants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010630656.7A CN111763446B (en) 2020-07-03 2020-07-03 Strippable hydrogel for removing surface pollutants

Publications (2)

Publication Number Publication Date
CN111763446A CN111763446A (en) 2020-10-13
CN111763446B true CN111763446B (en) 2022-02-11

Family

ID=72723657

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010630656.7A Active CN111763446B (en) 2020-07-03 2020-07-03 Strippable hydrogel for removing surface pollutants

Country Status (1)

Country Link
CN (1) CN111763446B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113234362B (en) * 2021-04-26 2022-04-15 青岛职业技术学院 Photosensitive antifouling coating based on alginate gel-sol and preparation method and application thereof
CN113292745B (en) * 2021-06-22 2023-04-11 华中科技大学同济医学院附属同济医院 Sodium alginate hydrogel, preparation method thereof and hydrogel biological scaffold with sodium alginate hydrogel
CN113351187B (en) * 2021-06-23 2022-04-26 中南林业科技大学 Heavy metal ion imprinted hydrogel ball and preparation method and application thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6790840B1 (en) * 1999-11-26 2004-09-14 The Regents Of The University Of Michigan Reversibly cross-linked hydrogels
CN101394942A (en) * 2006-02-28 2009-03-25 细胞生物工程有限公司 Polymer composition and method for removing contaminates from a substrate
CN110052173A (en) * 2019-04-04 2019-07-26 天津工业大学 A kind of preparation method for introducing bubble and improving the hydrogel filter membrane of flux

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3046918B2 (en) * 1994-10-17 2000-05-29 クレオール株式会社 How to clean painted surfaces
CN107694529A (en) * 2017-10-30 2018-02-16 天津市金鳞水处理科技有限公司 A kind of preparation method of heavy metal ion and organic dyestuff Adsorption type composite aquogel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6790840B1 (en) * 1999-11-26 2004-09-14 The Regents Of The University Of Michigan Reversibly cross-linked hydrogels
CN101394942A (en) * 2006-02-28 2009-03-25 细胞生物工程有限公司 Polymer composition and method for removing contaminates from a substrate
CN110052173A (en) * 2019-04-04 2019-07-26 天津工业大学 A kind of preparation method for introducing bubble and improving the hydrogel filter membrane of flux

Also Published As

Publication number Publication date
CN111763446A (en) 2020-10-13

Similar Documents

Publication Publication Date Title
CN111763446B (en) Strippable hydrogel for removing surface pollutants
JP3490446B2 (en) Fluid and method for removing contaminants from surfaces
CN111909558B (en) Polyvinyl alcohol-based strippable membrane detergent and preparation method and use method thereof
KR20030033988A (en) Method and Apparatus for Removing Organic Films
CN104437052A (en) Chemical laboratory waste gas treating method and chemical laboratory waste gas treating device
CN113045984A (en) Quick-drying high-strength strippable film for radioactive surface decontamination and preparation method thereof
CN100459057C (en) Cleaning method of crystal column surface
CN112251142B (en) Development and application of multifunctional polymer-based surface cleaning antiskid technology
Kohli Applications of Strippable Coatings for Removal of Surface Contaminants
Rao et al. Surface decontamination studies using polyvinyl acetate based strippable polymer
CN107385927A (en) Photocatalysis graphene fiber
CN102989715A (en) Treatment method for dark ultraviolet optical film substrate
KR101821034B1 (en) A method of stripping photoresist
Marcotte et al. Monitoring of lead arsenic and mercury in the indoor air and settled dust in the Natural History Museum of Rouen (France)
KR20080111268A (en) Cleaning solution composition and cleaning method using the same
CN1338757A (en) Film for removing surficial radioactivity pollution and process for preparing its filming agent
CN109750305A (en) A kind of aluminum-shell battery shell decontamination rust remover and the preparation method and application thereof
JP2018153761A (en) Dioxin removal method
CN114085676B (en) Radioactive contaminated soil cleaning agent composition, cleaning agent, preparation method and application thereof
CN108130226A (en) Cleaning solution of high-power semiconductor laser module optical window and preparation method thereof, polytetrafluoroethylene (PTFE) fixture and cleaning
CN109719081A (en) A kind of cleaning method of devitrified glass
Kohli Strippable coatings for removal of surface contaminants
US20170342277A1 (en) Removable smart sequestration coatings for hazardous metals
Sasala et al. Environmentally responsible production, use and disposition of Cd-Bearing PV modules
JP2013096959A (en) Radioactive decontamination method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant