CN110882678A - Preparation method of modified waste hydrophobic fiber oil absorption material - Google Patents
Preparation method of modified waste hydrophobic fiber oil absorption material Download PDFInfo
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 70
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
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- 239000003431 cross linking reagent Substances 0.000 claims abstract description 15
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- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 239000010893 paper waste Substances 0.000 claims description 9
- 239000000376 reactant Substances 0.000 claims description 9
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- 239000002994 raw material Substances 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
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- 239000013078 crystal Substances 0.000 claims description 6
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- 235000019441 ethanol Nutrition 0.000 claims description 6
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- -1 polysiloxane Polymers 0.000 claims description 5
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 4
- MHABMANUFPZXEB-UHFFFAOYSA-N O-demethyl-aloesaponarin I Natural products O=C1C2=CC=CC(O)=C2C(=O)C2=C1C=C(O)C(C(O)=O)=C2C MHABMANUFPZXEB-UHFFFAOYSA-N 0.000 claims description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 229960000583 acetic acid Drugs 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
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- 239000001913 cellulose Substances 0.000 claims description 3
- 239000012362 glacial acetic acid Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims 2
- 230000002745 absorbent Effects 0.000 claims 2
- 230000014759 maintenance of location Effects 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 14
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 5
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- 238000010276 construction Methods 0.000 abstract description 3
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- 239000010779 crude oil Substances 0.000 description 6
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- 239000000312 peanut oil Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
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- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
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- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Substances OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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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
- 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
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
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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
- 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
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
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- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a preparation method of a modified waste hydrophobic fiber oil absorption material, which specifically comprises the following steps: the method comprises the steps of pretreatment of waste fiber materials, surface treatment of the waste fiber materials, hydrophobic modification of the surfaces of the waste fiber materials and the like. The method can expose more activated hydroxyl groups to the waste fibers through pretreatment of the waste fiber material, and the polymerization degree of the material is not obviously changed before and after the treatment, so that the material has better mechanical property after being formed, and the requirement in practical application is met; the waste fiber material is subjected to surface treatment, the waste fiber is subjected to surface rough structure construction by using tetraethoxysilane, a cross-linking agent is added to improve the cross-linking density, more three-dimensional network structures are formed and the specific surface area is improved, and finally, the surface of the waste fiber material is subjected to hydrophobic modification, and OTS-absolute ethyl alcohol modified solution is used for forming more attachment points on the surface of the fiber, so that the oil absorption and oil retention capacity of the waste fiber can be greatly improved.
Description
Technical Field
The invention relates to a preparation method of an oil absorption material, and particularly relates to a preparation method of a modified waste hydrophobic fiber oil absorption material.
Background
In recent years, domestic oil pollutes atmosphere and water more and more seriously, waste oil leaks into water environment, water quality is deteriorated, aquatic organisms and marine feeding birds die, and even offshore fishery, aquaculture industry, tourism industry and the like are threatened, so that development of high-efficiency oil absorption materials becomes a focus of attention of people. The oil absorbing material can be generally classified into inorganic materials, organic synthetic materials and natural polymer materials. Inorganic materials such as activated carbon, expanded graphite, silica, organically modified clay and the like are rarely used at present due to low oil absorption rate and difficult recovery; organic synthetic materials comprise polypropylene, polyurethane foam, acrylate and olefin oil-absorbing resin and the like, which have good lipophilicity and oil-absorbing efficiency, but have the defects of high cost, low oil-absorbing rate and the like, so that the application of the organic synthetic materials is limited; the research on the waste high polymer materials such as waste paper, waste sweater, waste cotton clothes and other porous materials gradually becomes a focus due to high oil absorption rate, wide sources and low price.
Chinese patent publication No. CN103360571A discloses a method for preparing a high oil absorption material based on waste plant fibers, which prepares a high-performance oil absorption/retention material by modifying waste cotton fibers, and the method adopts a grafting reaction to prepare a cellulose-TDI oil absorption material and a cellulose-TDI-ethylene glycol oil absorption material, and the prepared oil absorption material has the characteristics of high oil absorption multiple, high oil absorption rate, good oil-water selectivity, high oil retention rate and the like. The obtained novel material can absorb oil with different properties, can be used for environmental protection, and can also be applied to other fields such as agriculture, pharmaceutical industry, fine chemical industry and the like. However, the method has a narrow application range, is only suitable for waste cotton fibers, is not suitable for other waste fiber materials such as waste paper, waste fur clothing and the like, has high requirements on reaction conditions in a grafting reaction, greatly influences the final performance of products on the grafting quantity of actual products, has poor stability of the products, and is not suitable for large-scale production and application.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation method of a modified waste hydrophobic fiber oil absorption material, which has a wide application range, improves the oil absorption and retention capacity of waste fibers by constructing the surface rough structure of the waste fibers and modifying the low surface energy, and has high oil absorption rate and strong oil retention capacity.
In order to realize the technical scheme, the invention provides a preparation method of a modified waste hydrophobic fiber oil absorption material, which specifically comprises the following steps:
s1, pretreatment of the waste fiber material: crushing the waste fiber material by using a crusher, screening to obtain crystal grains with proper size, putting 2g of the fiber crystal grain material into a 200mL beaker, adding 100mL of ethylenediamine solution with the mass concentration of 50-60% for treatment for 3-5h, then washing with deionized water to be neutral, drying to constant weight, adding the dried cellulose into 96mL of DMAC, adding 8g of anhydrous LiCl at 100 ℃, stirring for 2h, putting into a 60 ℃ oven, and drying to constant weight to obtain the pretreated waste fiber material for later use;
s2, surface treatment of waste fiber materials: taking 2g of the waste fiber material obtained after the treatment in the step S1, adding the waste fiber material into a four-neck flask, adding 45mL of absolute ethyl alcohol, 5mL of deionized water, 5g of urea and 10mL of silicic acid with the molar concentration of 6mmol/L into the four-neck flask, stirring for 10-30min at normal temperature, adding 50mL of tetraethyl orthosilicate with the mass concentration of 10% into the four-neck flask, reacting for 1h, then putting reactants into a sealed container, adding a cross-linking agent to ensure that the mass concentration of the cross-linking agent in a raw material system is 1-5%, transferring the reactants to a forced convection oven to react for 9 hours at 80 ℃, centrifuging, washing with alcohol, and drying the reactants in the oven at 60 ℃ to constant weight to obtain the surface treatment waste fiber material;
s3, performing hydrophobic modification on the surface of the waste fiber material: and (2) magnetically stirring for 4 hours at the normal temperature in an OTS ethanol aqueous solution at the rotating speed of 400rpm, dropwise adding 0.05ml of glacial acetic acid to prepare an OTS-absolute ethanol modified solution with the concentration of 1%, soaking the waste fiber material subjected to surface treatment in the step S2 in the modified solution for 2 hours, fishing out the waste fiber material by using a wire gauze, washing the waste fiber material for 3 times by using absolute ethanol, and drying the waste fiber material in a 60 ℃ oven to constant weight to obtain the modified waste fiber material.
Preferably, the waste fiber is one or more of waste paper, waste sweater and waste pure cotton clothes.
Preferably, the crosslinking agent in step S2 is one of polymethacrylhydroxamosiloxane, vinyl polysiloxane, or divinylbenzene.
The preparation method of the modified waste hydrophobic fiber oil absorption material provided by the invention has the beneficial effects that:
1. the method can expose more activated hydroxyl groups to the waste fibers through pretreatment of the waste fiber material, and the polymerization degree of the material is not obviously changed before and after the treatment, so that the material has better mechanical property after being formed, and the requirement in practical application is met; the waste fiber material is subjected to surface treatment, the waste fiber is subjected to surface rough structure construction by using tetraethoxysilane, a cross-linking agent is added to improve the cross-linking density, more three-dimensional network structures are formed and the specific surface area is improved, and finally, the surface of the waste fiber material is subjected to hydrophobic modification, and OTS-absolute ethyl alcohol modified solution is used for forming more attachment points on the surface of the fiber, so that the oil absorption and oil retention capacity of the waste fiber can be greatly improved.
2. The method has wide adaptability, is suitable for various waste fibers such as waste paper, waste sweater, waste pure cotton clothes and the like, has wide source, low cost, environmental protection and resource saving, effectively treats the domestic waste, has no secondary pollution, does not contain toxic and harmful organic synthetic compounds, and is suitable for large-scale industrial popularization.
3. According to the invention, the oil absorption and retention capacity of the waste fibers is improved by constructing the surface rough structure of the waste fibers and modifying the low surface energy, and the waste fibers have high oil absorption rate and good oil retention performance while being subjected to hydrophobic modification, and are used in places such as land, water, factory production workshops and the like.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
The detection and characterization method of the waste fiber oil absorption material prepared in the specific embodiment of the invention is as follows:
1. and (4) testing the oil absorption multiplying power, the water absorption multiplying power and the oil holding rate of the product.
The oil and clean water were each charged into 500mL dry glass beakers. Putting a container made of 30-mesh polypropylene net filled with an oil absorption material into beakers filled with oil products or water at 25 ℃, and respectively adsorbing for 5 mins. The container was taken out with tweezers, placed on a stainless steel screen, drained for 5min, weighed, and subjected to a blank test while repeating the average value three times.
The calculation formula of the oil absorption multiplying power and the water absorption multiplying power is as follows:
q ═ m3-m2-m 1/m 1 formula (1);
in formula (1): q is the oil absorption multiplying power or the water absorption multiplying power (g/g); m1 is the mass (g) of the dry oil absorbing material; m2 is the mass (g) of the container; m3 is the mass (g) of the oil absorbing material or the oil absorbing material after absorbing water and the container.
2. And (3) measuring the oil holding rate of the natural organic oil absorption material:
the sample is weighed after oil absorption test, placed in a 500mL beaker filled with 300mL of water, vibrated for 10min, taken out, drained for 5min and removed. At this point, the beaker contains water and oil that the sample is washed out during shaking. And pouring the oil-water mixture in the beaker into a separating funnel, standing for layering, discharging the lower layer water in the separating funnel, and weighing to obtain the quality of the flushed oil. Further, the oil content in the sample after shaking was known. The specific calculation formula is as follows:
h (m3-m2-m1-m4)/(m3-m2-m1) formula (2)
In formula (2): h is the oil holdup; m1 is the weight (g) of the dry oil absorbing material; m2 is the mass (g) of the container; m3 is the mass (g) of the oil absorbing material and the container after oil absorption; m4 represents the mass (g) of oil which the sample was shaken out of water.
Specific examples of the process of the present invention are given below.
Comparative example
The method comprises the steps of measuring unmodified waste pure cotton clothes, waste fur clothes and waste paper and a commercially available high-molecular polypropylene oil absorption material (oil absorption material with better oil absorption effect at present on the market) produced by Suzhou Hirland environmental protection science and technology Limited company, and measuring the oil absorption multiplying power and the oil holding rate of the material in various oils and water as follows
Table 1 shows:
TABLE 1
Example 1:
referring to fig. 1, a preparation method of a modified waste hydrophobic fiber oil absorption material specifically comprises the following steps:
s1, pretreatment of the waste fiber material: crushing waste pure cotton clothes by using a crusher, sieving, obtaining crystal grains with proper size by using a standard sieve with 20 meshes, putting 2g of fiber crystal grain material into a 200mL beaker, adding 100mL of ethylenediamine solution with the mass concentration of 50% for treatment for 3h, then washing with deionized water to be neutral, putting into a 50 ℃ oven for drying to be constant weight, adding dried cellulose into 96mL of DMAC (dimethylacetamide solution), adding 8g of anhydrous LiCl at 100 ℃, stirring for 2h, putting into a 60 ℃ oven for drying to be constant weight, obtaining pretreated waste fiber material, and reserving for pretreatment of the waste fiber material, wherein the purpose of pretreatment of the waste fiber material is as follows: more activated hydroxyl groups are exposed from the waste fibers, and the polymerization degree of the material is not obviously changed before and after treatment, so that the material has better mechanical property after being formed, and the requirement in practical application is met;
s2, surface treatment of waste fiber materials: taking 2g of waste fiber material obtained after the treatment of the step S1, adding the waste fiber material into a four-neck flask, adding 45mL of absolute ethyl alcohol, 5mL of deionized water, 5g of urea and 10mL of silicic acid with the molar concentration of 6mmol/L into the four-neck flask, stirring for 20min at normal temperature, adding 50mL of tetraethyl orthosilicate with the mass concentration of 10% into the four-neck flask, reacting for 1h, then putting reactants into a sealed container, adding a polymethacryloxime siloxane cross-linking agent, controlling the mass concentration of the polymethacryloxime siloxane cross-linking agent in a raw material system to be 3%, transferring the reactants to a forced convection oven to react for 9 hours at 80 ℃, centrifuging, washing with alcohol, drying the reactants in the oven at 60 ℃ to constant weight to obtain a surface treatment waste fiber material, wherein the surface treatment purpose of the waste fiber material is that: the waste fibers are subjected to surface rough structure construction by utilizing ethyl orthosilicate, and a cross-linking agent is added to improve cross-linking density, so that more three-dimensional network structures are formed, the specific surface area is improved, and subsequent hydrophobic modification is facilitated;
s3, performing hydrophobic modification on the surface of the waste fiber material: and (2) magnetically stirring for 4 hours at the normal temperature in an OTS ethanol aqueous solution at the rotating speed of 400rpm, dropwise adding 0.05ml of glacial acetic acid to prepare an OTS-absolute ethanol modified solution with the concentration of 1%, soaking the waste fiber material subjected to surface treatment in the step S2 in the modified solution for 2 hours, fishing out the waste fiber material by using a wire netting, cleaning the waste fiber material by using absolute ethanol for 3 times, drying the cleaned waste fiber material in a 60 ℃ oven to constant weight to obtain a modified waste fiber material, and performing hydrophobic modification on the surface of the waste fiber material to form more attachment points on the surface of the fiber by using the OTS-absolute ethanol modified solution, so that the oil absorption and oil retention capacity of the waste fiber can be greatly improved.
The oil absorption multiplying power and the oil holding rate of the waste fiber oil absorption material prepared in the embodiment in various oils and water are measured and shown in table 2:
TABLE 2
| Type of oil | Oil absorption multiplying power (g/g) | Oil holdup (%) |
| Crude oil | 23.8 | 92.4 |
| Diesel oil | 21.9 | 91.5 |
| Lubricating oil | 22.4 | 90.4 |
| Peanut oil | 21.2 | 93.2 |
Comparing the data in table 1 and table 2, it can be seen that the oil absorption multiplying power of the waste fiber oil absorption material prepared in this embodiment to oil basically reaches more than 20g/g, and the oil retention rate is more than 90%, and compared with the data in comparative example 1, the oil absorption multiplying power and the oil retention rate of the oil absorption material prepared by the method are superior to those of the oil absorption material products on the market at present.
Example 2
The concentration of the ethylenediamine is changed from 50 percent to 60 percent, the treatment time is changed from 3h to 5h, and the rest technical characteristics are the same as those of the embodiment 1
The oil absorption multiplying power and the oil holding rate of the waste fiber oil absorption material prepared in the embodiment in various oils and water are measured and shown in table 3:
TABLE 3
| Type of oil | Oil absorption multiplying power (g/g) | Oil holdup (%) |
| Crude oil | 22.8 | 96.4 |
| Diesel oil | 21.9 | 95.5 |
| Lubricating oil | 20.4 | 97.1 |
| Peanut oil | 21.2 | 96.5 |
As can be seen from Table 3, the oil absorption multiplying power of the waste fiber oil absorption material prepared in the embodiment on oil basically reaches more than 20g/g, and the oil retention rate is more than 95%. The method has the advantages that the ethylenediamine is used as a key factor for pretreating the waste fiber material, the concentration and the treatment time have certain influence on exposing more activated hydroxyl groups, the ethylenediamine concentration and the treatment time on the waste fiber are properly increased, more activated hydroxyl groups can be exposed, the oil absorption rate and the oil holding rate of a final product can be increased, but the ethylenediamine concentration is not too high, otherwise, the polymerization degree of the material can be reduced, and the mechanical property of the material after molding is reduced.
Example 3:
the difference from step S2 in example 1 is that the mass concentration of the polymethacryloxime siloxane crosslinking agent in the raw material system is controlled from 3% to 5%, the other technical features are the same as those in example 1,
the following table 4 shows the measurement of the oil absorption multiplying power and oil retention of the waste fiber oil absorption material prepared in this example in various oils and water:
TABLE 4
| Type of oil | Oil absorption multiplying power (g/g) | Oil holdup (%) |
| Crude oil | 21.8 | 98.4 |
| Diesel oil | 19.9 | 97.5 |
| Lubricating oil | 19.4 | 97.4 |
| Peanut oil | 21.2 | 96.2 |
As can be seen from table 4, the waste fiber oil-absorbing material prepared in this example has a slightly decreased oil-absorbing capacity to oil, but the oil-holding rate is significantly increased, compared to example 1.
Example 4:
the difference from step S2 of example 1 is that no cross-linking agent is added in this example, and the technical characteristics are the same as in example 1, and the oil absorption multiplying power and oil holding rate of the waste fiber oil absorption material prepared in this example in various oils and water are measured as shown in table 5:
TABLE 5
| Type of oil | Oil absorption multiplying power (g/g) | Oil holdup (%) |
| Crude oil | 21.8 | 72.4 |
| Diesel oil | 19.9 | 76.5 |
| Lubricating oil | 19.4 | 80.4 |
| Peanut oil | 21.2 | 77.2 |
Comparing the data in tables 2, 4 and 5, it can be seen that the waste fiber oil absorption material prepared in this embodiment has little change in oil absorption rate, but the oil retention rate is reduced more significantly without adding a cross-linking agent, and is reduced by more than 15% on average, so that the cross-linking agent as an important substance in the method can improve the cross-linking density, form more three-dimensional network structures, improve the specific surface area, and further greatly improve the oil retention rate.
Example 5
The raw material of the waste fiber material was changed to waste sweater, the rest steps were the same as in example 1, and the oil absorption multiplying power and oil retention of the waste fiber oil-absorbing material prepared in this example in various oils and water were measured as shown in table 6:
TABLE 6
| Type of oil | Oil absorption multiplying power (g/g) | Oil holdup (%) |
| Crude oil | 20.2 | 90.3 |
| Diesel oil | 19.4 | 89.1 |
| Lubricating oil | 19.2 | 89.3 |
| Peanut oil | 18.5 | 87.6 |
Comparing the data in table 1 and table 6, it can be seen that the method has a better modification effect on the waste fibers of the waste fur garment as the raw material, and the oil absorption multiplying power and the oil holding rate of the modified material are greatly increased compared with the unmodified waste fur garment.
Example 6
The raw material of the waste fiber material was changed to waste paper, the rest of the steps were the same as in example 1, and the oil absorption multiplying power and oil holding rate of the waste fiber oil-absorbing material prepared in this example in various oils and water were measured as shown in table 7:
TABLE 7
| Type of oil | Oil absorption multiplying power (g/g) | Oil holdup (%) |
| Crude oil | 18.6 | 88.4 |
| Diesel oil | 19.3 | 89.6 |
| Lubricating oil | 18.8 | 89.2 |
| Peanut oil | 18.1 | 87.6 |
Comparing the data in table 1 and table 7, it can be seen that the method has better modification effect on waste fiber using waste paper as raw material, and compared with unmodified waste paper, the modified material has greatly increased oil absorption rate and oil retention rate.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.
Claims (3)
1. A preparation method of a modified waste hydrophobic fiber oil absorption material is characterized by comprising the following steps:
s1, pretreatment of the waste fiber material: crushing the waste fiber material by using a crusher, screening to obtain crystal grains with proper size, putting 2g of the fiber crystal grain material into a 200mL beaker, adding 100mL of ethylenediamine solution with the mass concentration of 50-60% for treatment for 3-5h, then washing with deionized water to be neutral, putting into a 50 ℃ oven for drying to constant weight, adding the dried cellulose into 96mL of DMAC, adding 8g of anhydrous LiCl at 100 ℃, stirring for 2h, and putting into a 60 ℃ oven for drying to constant weight to obtain the pretreated waste fiber material for later use;
s2, surface treatment of waste fiber materials: taking 2g of the waste fiber material obtained after the treatment in the step S1, adding the waste fiber material into a four-neck flask, adding 45mL of absolute ethyl alcohol, 5mL of deionized water, 5g of urea and 10mL of silicic acid with the molar concentration of 6mmol/L into the four-neck flask, stirring for 10-30min at normal temperature, adding 50mL of tetraethyl orthosilicate with the mass concentration of 10% into the four-neck flask, reacting for 1h, then putting reactants into a sealed container, adding a cross-linking agent to ensure that the mass concentration of the cross-linking agent in a raw material system is 1-5%, transferring the reactants to a forced convection oven to react for 9 hours at 80 ℃, centrifuging, washing with alcohol, and drying the reactants in the oven at 60 ℃ to constant weight to obtain the surface treatment waste fiber material;
s3, performing hydrophobic modification on the surface of the waste fiber material: and (2) magnetically stirring for 4 hours at the normal temperature in an OTS ethanol aqueous solution at the rotating speed of 400rpm, dropwise adding 0.05ml of glacial acetic acid to prepare an OTS-absolute ethanol modified solution with the concentration of 1%, soaking the waste fiber material subjected to surface treatment in the step S2 in the modified solution for 2 hours, fishing out the waste fiber material by using a wire gauze, washing the waste fiber material for 3 times by using absolute ethanol, and drying the waste fiber material in a 60 ℃ oven to constant weight to obtain the modified waste fiber material.
2. The preparation method of the modified waste hydrophobic fiber oil absorbent material as claimed in claim 1, wherein the preparation method comprises the following steps: the waste fiber is one or more of waste paper, waste sweater and waste pure cotton clothes.
3. The preparation method of the modified waste hydrophobic fiber oil absorbent material as claimed in claim 1, wherein the preparation method comprises the following steps: in the step S2, the cross-linking agent is one of polymethacrylhydroxamosiloxane, vinyl polysiloxane, or divinylbenzene.
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| CN112028271A (en) * | 2020-06-06 | 2020-12-04 | 兰州资源环境职业技术学院 | Kitchen waste oil-water separation and kitchen wastewater treatment method |
| CN114507983A (en) * | 2022-01-29 | 2022-05-17 | 上海电机学院 | Reinforced porous fiber oil absorption material and preparation method thereof |
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Application publication date: 20200317 |