CN114762823A - Method for preparing oil-water separation adsorption material by modifying waste mask - Google Patents
Method for preparing oil-water separation adsorption material by modifying waste mask Download PDFInfo
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- CN114762823A CN114762823A CN202111046361.6A CN202111046361A CN114762823A CN 114762823 A CN114762823 A CN 114762823A CN 202111046361 A CN202111046361 A CN 202111046361A CN 114762823 A CN114762823 A CN 114762823A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000002699 waste material Substances 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000000926 separation method Methods 0.000 title claims abstract description 23
- 238000001179 sorption measurement Methods 0.000 title claims description 13
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 34
- 238000001035 drying Methods 0.000 claims abstract description 28
- 238000003756 stirring Methods 0.000 claims abstract description 16
- PYJJCSYBSYXGQQ-UHFFFAOYSA-N trichloro(octadecyl)silane Chemical compound CCCCCCCCCCCCCCCCCC[Si](Cl)(Cl)Cl PYJJCSYBSYXGQQ-UHFFFAOYSA-N 0.000 claims abstract description 15
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 11
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 238000002791 soaking Methods 0.000 claims abstract description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 7
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 7
- OVYTZAASVAZITK-UHFFFAOYSA-M sodium;ethanol;hydroxide Chemical compound [OH-].[Na+].CCO OVYTZAASVAZITK-UHFFFAOYSA-M 0.000 claims abstract description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 235000019441 ethanol Nutrition 0.000 claims 1
- 238000002715 modification method Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000001954 sterilising effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 25
- 235000019198 oils Nutrition 0.000 description 25
- 238000010521 absorption reaction Methods 0.000 description 22
- 239000010687 lubricating oil Substances 0.000 description 7
- 239000003549 soybean oil Substances 0.000 description 7
- 235000012424 soybean oil Nutrition 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000010724 circulating oil Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000002144 chemical decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- MPOKJOWFCMDRKP-UHFFFAOYSA-N gold;hydrate Chemical compound O.[Au] MPOKJOWFCMDRKP-UHFFFAOYSA-N 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
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- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000003305 oil spill Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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- 239000012744 reinforcing agent Substances 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/18—Liquid substances or solutions comprising solids or dissolved gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
- B01J20/3206—Organic carriers, supports or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3214—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the method for obtaining this coating or impregnating
- B01J20/3225—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the method for obtaining this coating or impregnating involving a post-treatment of the coated or impregnated product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
Abstract
The invention relates to the field of oil-water separation, in particular to a method for preparing an oil-water separation adsorbing material by modifying waste masks or industrial non-woven fabrics. The method comprises the following steps: sterilizing the waste mask and drying for later use; soaking the disinfected mask in a sodium hydroxide ethanol solution, and then washing and drying the mask; preparing a solution 1 containing tetraethoxysilane, normal butanol, deionized water and ammonia water; putting the dried mask into the solution 1, stirring and pre-modifying to obtain a pre-modified mask; preparing a solution 2 of octadecyl trichlorosilane; putting the pre-modified mask into the solution 2 and stirring to obtain a completely modified mask; and taking out the completely modified mask, and drying to obtain the adsorbing material for oil-water separation. The invention has the advantages of simple preparation process, lower cost, high reusability, realization of resource utilization of the waste mask and good environmental value. The method is not only suitable for disposing the waste mask, but also suitable for modifying industrial non-woven fabrics.
Description
The technical field is as follows:
the invention relates to the field of oil-water separation materials, in particular to a method for preparing an oil-water separation adsorbing material by modifying a waste mask or industrial non-woven fabric.
Background art:
masks are a type of sanitary article that can be used to protect the wearer and reduce the spread of respiratory pathogens. Particularly, after outbreak of new crown blight, masks are used in large quantities as an important means of avoiding infection. According to the statistics of gold water (disaster prevention exposition, 2021, 21 (03): 62-63), 1290 hundred million disposable masks are used and disposed every month in the world during the new crown epidemic period, thus seriously threatening the ecological environment. How to correctly treat a large amount of discarded masks generated during and after an epidemic situation is an important subject for resource utilization and is also an urgent requirement for protecting the ecological environment.
At present, the mask mainly comprises four recovery processing methods: firstly, the landfill degradation method utilizes the macromolecular material in the microbial degradation gauze mask in the soil, and the landfill degradation method consumes the cycle length, and the land demand is many, can cause secondary pollution to soil simultaneously. The other is a high-temperature burning method, the mask has high combustibility due to high carbon and hydrogen content, the heat energy generated by burning can be used for energy supply such as thermal power generation, and meanwhile, various toxic byproducts are generated to cause environmental pollution. Thirdly, a crushing recovery method, namely blending the components of the mask crushed into particles with other high polymer materials to generate a low-grade high polymer product for continuous utilization, wherein the patent CN 111516183A makes the mask body and the hanging rope of the waste mask into fragments to obtain mask fragments, the dried mask fragments, the coupling agent, the reinforcing agent, the antioxidant, the pigment and the antibacterial agent are subjected to banburying processing and then extrusion processing by adopting a banburying extruder, and the polypropylene composite material based on the waste mask is prepared after granulation. And fourthly, a chemical degradation method is adopted, the high molecular materials are converted into small molecular substances through chemical degradation, the small molecular substances are reprocessed to form new materials for utilization, and the process is complex and has high energy consumption.
With the increasing discharge of industrial oily wastewater and the frequent occurrence of oil spill, the treatment of oily wastewater has become a worldwide problem, and the search for suitable methods to solve the problem is urgent. The oily wastewater treatment technologies comprise air flotation, adsorption, flocculation, extraction and the like, but the technologies have the problems of large occupied area, high operation cost, secondary pollution, poor recovery capability and the like. As an effective oil-water separation technical means, the adsorption technology has the advantages of large material adsorption capacity, high adsorption rate, stable chemical property, reusability and the like. The patent CN 112980098A uniformly mixes POE, PP, antistatic agent and nucleating agent to prepare polyolefin foam, has the characteristics of high elasticity, antistatic property, oleophylic and hydrophobic property, high repeated utilization rate and the like, and has the adsorption capacity of 25g/g to diesel oil. Patent CN 112029142A mixes silica sol and silane coupling agent to prepare modified silica sol, modified silica sol is diluted and added with melamine sponge to obtain silica modified sponge, then the silica modified sponge is mixed with polytetrafluoroethylene emulsion and dimethylformamide and dried to obtain silica/polytetrafluoroethylene modified sponge with excellent oleophylic and hydrophobic properties, and the purification of floating oil on water surface is realized. Wenjunfeng et al (proceedings of elm academy of academic, 2020, 30 (06): 1-5) use nano zinc oxide and stearic acid modified non-woven fabric as adsorbing material, the modified non-woven fabric has better oil absorption and hydrophobic properties, stable oil absorption, high oil absorption multiplying power, can be recycled, and the adsorption to vegetable oil reaches 21.4g/g, thus being an ideal adsorbing material.
The mask and the industrial non-woven fabric are separation materials with a compact grid structure, which are prepared from high polymer materials by adopting a specific process, can be used for filtering and intercepting viruses and bacteria in the air, but no public report of preparing an oil-water separation material by modifying the mask is available at present. According to the invention, the waste mask is modified to obtain the adsorbing material with high oil absorption, so that the adsorbing material has good social, environmental and economic benefits.
The invention content is as follows:
at present, most of waste masks are treated as solid wastes, so that the resource utilization value is low, and the environmental benefit is not obvious. The invention utilizes the waste mask to prepare the oil absorption material, thereby realizing the value-added reutilization of the waste mask.
The purpose of the invention can be realized by the following technical scheme:
the method for preparing the oil-water separation adsorbing material by modifying the waste mask or the industrial non-woven fabric comprises the following steps:
(1) after the waste mask or the industrial non-woven fabric is disinfected, sterilized and cleaned, the waste mask or the industrial non-woven fabric is dried for standby;
(2) preparing a sodium hydroxide ethanol solution with a certain concentration;
(3) soaking the disinfected mask or industrial non-woven fabric into the solution obtained in the step (2), and washing and drying the mask or industrial non-woven fabric for later use;
(4) preparing ethyl orthosilicate, n-butanol and deionized water into a solution, then dropwise adding ammonia water, and stirring to obtain a clear transparent solution 1;
(5) putting the mask or the industrial non-woven fabric in the step (3) into the solution 1 in the step (4) to be stirred for pre-modification, then washing with deionized water, and drying to obtain a pre-modified mask or a pre-modified industrial non-woven fabric;
(6) dispersing octadecyl trichlorosilane into absolute ethyl alcohol (or solvents such as toluene and the like) to prepare a uniform solution 2 containing octadecyl trichlorosilane;
(7) and (3) immersing the dried pre-modified mask or pre-modified industrial non-woven fabric into the solution 2 obtained in the step (6) and stirring to obtain a completely modified mask or completely modified industrial non-woven fabric, washing with absolute ethyl alcohol and drying to obtain the oil-water separation adsorbing material.
Preferably, the mask or the industrial non-woven fabric obtained in the step (1) can be immersed in an absolute ethyl alcohol solution for ultrasonic treatment;
preferably, the sodium hydroxide ethanol solution in the step (2) has the sodium hydroxide mass fraction of 5-15%;
preferably, the soaking time in the step (3) is 12-24h, the drying time is 4-12h, and the drying temperature is 50-80 ℃;
preferably, the solution 1 in the step (4) is prepared by ethyl orthosilicate, n-butanol and distilled water according to the proportion of (1-3) to (1-6) to (1-12), ammonia water is dripped, and then the solution is stirred for 30min to 60 min;
preferably, in the step (5), the mask or the industrial non-woven fabric is stirred in the solution 1 for 4 to 6 hours at the temperature of between 20 and 30 ℃, the drying time is between 2 and 8 hours, and the drying temperature is between 50 and 80 ℃;
preferably, the volume ratio of the octadecyl trichlorosilane to the absolute ethyl alcohol in the step (6) is 5mL/L-25 mL/L;
preferably, the stirring time in the step (7) is 1.5-3h, the drying time is 1-3h, and the drying temperature is 40-80 ℃.
Compared with the prior mask disposal technology, the invention has the following characteristics:
(1) according to the invention, the oil-water separation adsorption material is prepared by modifying the mask, so that the high-efficiency and value-added recycling of the waste mask is realized, and the environmental risk caused by landfill or incineration treatment of the waste mask is reduced.
(2) The method for preparing the oil-water separation adsorbing material by modifying the waste masks is simple and easy to implement, and the selected additives are convenient and easy to obtain. The used equipment is common equipment in the field, the process period is short, the requirement on the process environment is low, the cost is low, and the method can be widely applied.
Description of the drawings:
FIG. 1 is a schematic view showing the principle of modification of the waste mask of the present invention.
Fig. 2 shows the effect of the circulating oil absorption performance of the mask intermediate layer prepared in example 1 of the present invention.
Fig. 3 is a scanning electron micrograph of an unmodified and a modified waste mask used in example 2 of the present invention. In the figure, a, c and e are respectively an unmodified middle layer, an inner layer and an outer layer of the mask, and b, d and f are respectively a modified middle layer, an inner layer and an outer layer of the mask.
The specific implementation mode is as follows:
the following examples are further illustrative of the present invention as an illustration of the technical content of the present invention, but the essence of the present invention is not limited to the following specific examples, and any simple variation of the preparation process is within the scope of the present invention as claimed.
Example 1:
(1) after the waste mask is disinfected, sterilized and cleaned, the mask is detached after being dried, and the middle layer of the mask is modified;
(2) preparing a sodium hydroxide ethanol solution with the mass fraction of sodium hydroxide of 8%;
(3) immersing the mask subjected to the disinfection treatment into the solution in the step (2), and drying for later use;
(4) preparing ethyl orthosilicate, n-butanol and deionized water into a solution according to the proportion of 1: 2: 4, then dropwise adding ammonia water, and stirring to obtain a clear transparent solution 1;
(5) putting the mask in the step (3) into the solution 1 in the step (4), stirring for pre-modification, washing with deionized water, and drying to obtain a pre-modified mask;
(6) dispersing octadecyltrichlorosilane into absolute ethyl alcohol (or solvents such as toluene) to prepare a uniform solution 2 containing octadecyltrichlorosilane, wherein the volume ratio of the octadecyltrichlorosilane to the solvents is 10 mL/L;
(7) and (4) immersing the dried pre-modified mask into the solution 2 obtained in the step (6), stirring to prepare a completely modified mask, washing with absolute ethyl alcohol, and drying to obtain the oil-water separation adsorbing material.
The oil absorption performance test of the modified mask of the present example was performed according to the following steps:
weighing the mask, soaking in a beaker filled with 50ml of oil (lubricating oil and soybean oil), soaking at normal temperature for 10min, suspending until no oil drops, weighing the mass after oil absorption by an electronic analytical balance, and calculating the initial oil absorption. Absorbing surface oil of the mask after the first oil absorption by using oil absorption paper, centrifuging for 2min, immersing in oil again, and repeating for 10 times to obtain the circulating oil absorption.
The oil absorption of the middle layer of the mask, which is not modified, on lubricating oil, soybean oil and engine oil is 14.63g/g, 11.94g/g and 17.03g/g, and the initial oil absorption of the middle layer of the mask, which is modified, on the lubricating oil, the soybean oil and the engine oil reaches 28.52g/g, 26.84g/g and 32.81 g/g; the modified middle layer of the mask has circulating oil absorption of about 25g/g, 21g/g and 28g/g for lubricating oil, soybean oil and engine oil, and has ideal effect and excellent circulating oil absorption performance.
Example 2:
(1) after the waste mask is disinfected, sterilized and cleaned, drying for later use;
(2) preparing a sodium hydroxide ethanol solution with the mass fraction of sodium hydroxide of 8%;
(3) immersing the mask subjected to the disinfection treatment into the solution in the step (2), and drying for later use;
(4) preparing ethyl orthosilicate, n-butanol and deionized water into a solution according to the proportion of 1: 2: 4, then dropwise adding ammonia water, and stirring to obtain a clear transparent solution 1;
(5) putting the mask in the step (3) into the solution 1 in the step (4), stirring for pre-modification, washing with deionized water, and drying to obtain a pre-modified mask;
(6) dispersing octadecyltrichlorosilane into absolute ethyl alcohol (or solvents such as toluene) to prepare a uniform solution 2 containing octadecyltrichlorosilane, wherein the volume ratio of the octadecyltrichlorosilane to the solvents is 20 mL/L;
(7) and (4) immersing the dried pre-modified mask into the solution 2 obtained in the step (6), stirring to prepare a completely modified mask, washing with absolute ethyl alcohol, and drying to obtain the oil-water separation adsorbing material.
The oil absorption performance test of the completely modified mask of the embodiment is carried out according to the following steps:
weighing the mask, soaking in a beaker filled with 50ml of oil (lubricating oil and soybean oil), soaking at normal temperature for 10min, suspending until no oil drops, weighing the mass after oil absorption by an electronic analytical balance, and calculating the oil absorption.
The oil absorption of the whole mask which is not modified on the lubricating oil and the soybean oil is 8.36g/g and 6.23 g/g, and the oil absorption of the whole mask which is modified on the lubricating oil and the soybean oil is 16.92g/g and 13.37 g/g.
Specific test results are shown in Table 1
TABLE 1 oil absorption Properties of modified masks in examples
Claims (6)
1. A method for preparing an oil-water separation adsorption material by modifying a waste mask or industrial non-woven fabric comprises the following steps:
(1) after the waste mask or the industrial non-woven fabric is disinfected, sterilized and cleaned, the waste mask or the industrial non-woven fabric is dried for standby;
(2) preparing a sodium hydroxide ethanol solution with a certain concentration;
(3) soaking the disinfected mask or industrial non-woven fabric into the solution obtained in the step (2), and washing and drying the mask or industrial non-woven fabric for later use;
(4) preparing ethyl orthosilicate, n-butanol and deionized water into a solution, then dropwise adding ammonia water, and stirring to obtain a clear transparent solution 1;
(5) putting the mask or the industrial non-woven fabric in the step (3) into the solution 1 in the step (4) to be stirred for pre-modification, washing with deionized water, and drying to obtain a pre-modified mask or a pre-modified industrial non-woven fabric;
(6) dispersing octadecyl trichlorosilane into absolute ethyl alcohol (or solvents such as toluene and the like) to prepare a uniform solution 2 containing octadecyl trichlorosilane;
(7) and (3) immersing the dried pre-modified mask or pre-modified industrial non-woven fabric into the solution 2 obtained in the step (6) and stirring to obtain a completely modified mask or completely modified industrial non-woven fabric, washing with absolute ethyl alcohol and drying to obtain the oil-water separation adsorbing material.
2. The method for preparing the oil-water separation adsorbing material by modifying the waste masks or the industrial non-woven fabrics according to claim 1, wherein the mass fraction of sodium hydroxide in the sodium hydroxide ethanol solution in the step (2) is 5-15%, and the waste masks or the industrial non-woven fabrics are soaked in the solution for 12-24 hours; the drying time is 4-12h, and the drying temperature is 50-80 ℃.
3. The method for preparing an oil-water separation adsorption material by modifying a waste mask or an industrial non-woven fabric according to claim 1, wherein the solution 1 in the step (4) is prepared by mixing ethyl orthosilicate, n-butanol and distilled water according to a ratio of (1-3) to (1-6) to (1-12), adding ammonia water dropwise, and stirring for 30-60 min.
4. The method for preparing the oil-water separation adsorbing material by modifying the waste mask or the industrial non-woven fabric according to claim 1, wherein the pre-modification method in the step (5) is to stir the mask or the industrial non-woven fabric in the solution 1 for 4 to 6 hours at the temperature of 20 to 30 ℃; the drying time is 2-8h, and the drying temperature is 50-80 ℃.
5. The method for preparing the oil-water separation adsorption material by modifying the waste masks or the industrial non-woven fabrics according to claim 1, wherein the volume ratio of the octadecyl trichlorosilane to the solvent in the step (6) for preparing the solution 2 of octadecyl trichlorosilane is 5mL/L to 25mL/L, and the solvent includes but is not limited to ethanol, toluene and the like.
6. The method for preparing the oil-water separation adsorption material by modifying the waste masks or the industrial non-woven fabrics in the step (7), wherein the stirring time of the pre-modified masks or the pre-modified industrial non-woven fabrics in the octadecyl trichlorosilane solution in the step (7) is 1.5 to 3 hours, the drying time is 1 to 3 hours, and the drying temperature is 40 to 80 ℃.
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