CN104710647A - Preparation method of super-hydrophobic cellulose aerogel and application of super-hydrophobic cellulose aerogel in oil stain treatment - Google Patents
Preparation method of super-hydrophobic cellulose aerogel and application of super-hydrophobic cellulose aerogel in oil stain treatment Download PDFInfo
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Abstract
The invention discloses a preparation method of a super-hydrophobic cellulose aerogel and application of the super-hydrophobic cellulose aerogel in oil stain treatment. The light-weight porous cellulose aerogel material is prepared from abundant, renewable and degradable cellulose by using an alkali solution (comprising NaOH solution and NaOH/urea solution) as a solvent system. The minimum density can reach 0.0196 g/cm<3>, and the porosity can reach 99%. Compared with the commercial oil-adsorbing felt material, the cellulose aerogel material has higher adsorbing rate and excellent reusability. The hydrophobic modification method can obtain the super-hydrophobic effect in a quick, effective and energy-saving way, and can implement oil stain collection, oil-water separation and the like in a quick and economical way.
Description
Technical field
The present invention relates to field of functional materials, also belong to natural polymer field, chemistry, field of environment engineering.Particularly relate to a kind of superhydrophobic fibers element preparation method of aerogel and the application in oily waste treatment thereof.
Background technology
Along with going from bad to worse of physical environment, the daily life that serious threat is arrived, people also recognize the importance of environmental improvement gradually.Particularly for developing country, economic growth fast consumes bulk petroleum equal energy source for driving source, but most of energy is but at the cost of the environment in transport and use procedure, brings serious challenge to the diversity of the Sustainable development of the mankind and the whole ecosystem.As the greasy dirt leakage accidents such as Gulfian crude oil leakage, Qingdao Harbour Oil spills in 2008 take place frequently, bring devastating disaster to local environment; But the trend that this type of event does not reduce, accident treatment work is difficult poor efficiency also.For China, in the last few years along with the shortage of the energy, exploitation submarine oil had risen to national strategy security arrangement.Offshore drilling platforms is flourish like the mushrooms after rain especially, but around nearly sight platform, the crude oil of leakage wafts toward ocean everywhere along with wave ocean current etc. moves, and because its refractory organics is easy to form accumulation, has directly cut off benthic breathing.Also may be gathered on shoreline simultaneously, destroy local environment.Moreover, growing along with population, sanitary sewage total amount especially exponentially type increase.These waste water not only contaminate environment, wherein having greatly can also recycling, as trench wet goods, helps prior art can be cracked into the higher Aviation Fuel of fuel value by reclaiming to relend.
But address these problems at present and be faced with a technical barrier, how easy, effective, economic that be exactly the useful component in these greasy dirts leaked of recovery and sanitary wastewater, do not bring secondary pollution to environment simultaneously.Current main processing ways adopts the sorbing material of hydrophobic oleophilic oil be separated from water by these organic pollutants and collect, then reused by prior art.But this type of sorbing material current be faced with poor efficiency, absorption multiplying power low, cause secondary pollution, the problem such as can not to reuse.As common commercial oil sorbent mat material, its maximum adsorption multiplying power only has 10gg
-1left and right, is difficult to meet the process of large-area greasy dirt leakage accident.And itself material is polypropylene material, be petrochemical materials, be difficult to degraded at occurring in nature, can secondary pollution be brought.Therefore find a kind of environmental protection, study hotspot that clean and effective, greasy dirt sorbing material that Financial cost is low have become numerous scientific research personnel.
As the sorbing material of greasy dirt absorption, its use properties generally investigates five indexs and absorption property, reusability, hydrophobic performance, Financial cost and Environmental costs.The sorbing material that current report after deliberation compares environmental protection comprises, distortion carbon fiber, carbon nanotube, cellulose nano-fibrous, the aerogels such as graphene oxide, its absorption multiplying power is not from tens to hundred times etc., but wherein major part is all carbonaceous material, as with carbon nanotube, the porous aerogel that Graphene etc. are prepared for raw material, its absorption multiplying power is high, reusability is good, have super-hydrophobic, oleophilic properties, be easy to realize greasy dirt be separated and collect, but it is evident that the cost of these materials is too expensive, the laboratory study stage can only be rested on, can not produce in a large number, be difficult to obtain commercial applications.Except this type of carbonaceous aerogel is often used as except greasy dirt sorbing material, waste paper fibre and derivatived cellulose etc. are also often used as sorbing material, but this type of material be faced with absorption multiplying power not high, reuse rate variance and need through defects such as hydrophobic oleophilic oil modifications, and face the problems such as weak effect, cycle be long equally about the hydrophobic oleophilic oil modification of this type of material at present.
Mierocrystalline cellulose is the natural polymer that nature enriches the most, is widely used in the fields such as weaving, food, building.Because it has the characteristic such as environmental protection, renewable degradable, it is made to become important raw and processed materials in investigation of materials gradually.But the defects such as absorption multiplying power is low, repetition poor practicability that the cellulosic sorbing material of current research exists.And due to the easy water-absorbent of natural polysaccharide, the aerogel material of preparation can not realize oily water separation.And current hydrophobically modified method is mainly sol-gel method, the hydrolysis method and pickling process etc. of properties-correcting agent with organosilane.These methods destroy the original structure of modified substrate on the one hand, and modification efficiency is low in addition simultaneously, the cycle long and there is the problems such as a large amount of waste properties-correcting agent.
Summary of the invention
The object of this invention is to provide the greasy dirt sorbing material that economic environmental protection possesses again the characteristics such as high absorption multiplying power, reusable and super-hydrophobic oleophylic simultaneously, can the superhydrophobic fibers element aerogel of the problem such as process greasy dirt leakage of more simple and effective, economic environmental protection.
To achieve these goals, technical scheme of the present invention is: the preparation method providing a kind of superhydrophobic fibers element aerogel, comprises the following steps:
(1) cellosolve preparation:
With NaOH alkali systems for cellosolve system, to be made up of 7-14wt.%NaOH, 81-92wt.% aqueous solution or 6-8wt.%NaOH, 10-14wt.% urea, the 73wt.%-83wt.% aqueous solution form; The solvent of configuration is placed in-10 DEG C ~-20 DEG C precooling 10 ~ 30min;
(2) preparation of cellulose solution
Added to by 1%-5wt.% Mierocrystalline cellulose in the cellosolve that step (1) prepares, mechanical stirring obtains uniform cellulose solution;
(3) preparation of cellulose aquagel
In the cellulose solution of step (2), drip precipitation agent, obtain cellulose aquagel; Finally wash away residual solvent with distilled water again, pure cellulose aquagel can be obtained; Wherein, precipitation agent comprises 3wt.%-25wt.%H
2sO
4solution, dehydrated alcohol, acetic acid, methyl alcohol, acetone one wherein;
(4) preparation of cellulose aerogels
Cellulose aquagel freezing at low temperatures formation Mierocrystalline cellulose frozen glue prepared by step (3), then obtain cellulose aerogels through lyophilize; Wherein lyophilize temperature-60 DEG C ~-80 DEG C, pressure is less than or equal to 15Pa;
(5) cold plasma hydrophobically modified
Cellulose aerogels step (4) obtained to be anhydrated point 60 DEG C of bakings, adopts cold plasma modified equipment to carry out hydrophobically modified to it; Cellulose aerogels is placed on specimen holder, vacuumizes, when vacuum tightness touches the bottom, properties-correcting agent medium is filled in reactor; When vacuum tightness reaches a constant value, plasma power is adjusted to required value, build-up of luminance, regulates matching box until reflective power is minimum, at the power of 60-250w with under the time of 1-15min after electric discharge, super-hydrophobicity cellulose aerogels can be obtained; Wherein properties-correcting agent mainly selects organosilane, comprises trimethylchlorosilane, METHYL TRICHLORO SILANE, perfluor silane, methyltrimethoxy silane, dimethyl silanol or trialkoxy silane wherein a kind of.
Described properties-correcting agent preferentially selects trimethylchlorosilane.
Described cellulosic material selects cotton linters cellulose, bacteria cellulose, bagasse cellulose, pulp fibers element or resin fibre is plain and waste paper fibre etc.Cellulosic material selects M η≤1.2 × 10 especially
5mierocrystalline cellulose.
Another object of the present invention is to the application of super-hydrophobicity cellulose aerogels in sea pollution by oil leakage process, sewer oil recycling and other oily water separation field oily waste treatment.
Cellulose aerogels prepared by the present invention has the characteristic such as lightweight, porous, is illustrated in figure 1 the variation relation that the density of cellulose aerogels material of the present invention and porosity increase along with cellulose concentration.See that superhydrophobic fibers element aerogel density that the present invention prepares is at 0.0196-0.0680g/cm
-3between, porosity is greater than 95%, reaches as high as 99%.This characteristic provides large quantity space cellulose aerogels material is had consumption that high absorption multiplying power in turn saves unit fiber element raw material simultaneously on the one hand.
Cellulose aerogels material prepared by the present invention has superhydrophobic characteristic and hydrophobic modification techniques is easy, quick.Be illustrated in figure 2 the water contact angle of 3wt.% cellulose aerogels material and cold plasma modified power relation.In modified device resolving range, by cold-island effect, take organosilane as properties-correcting agent, cellulose aerogels material just can obtain superhydrophobic characteristic at short period (2min).On the one hand because organosilane chemistry activity is higher, silane free radical can hydroxy combining fast and on cellulose chain; On the other hand, compared to other properties-correcting agent as CCl
4, CF
4deng, organosilane-modifiedly provide more hydrophobic groupings.As trimethylchlorosilane, three hydrophobic meth just can be adhered in a hydroxyl modification site, substantially increase hydrophobically modified effect.
Cellulose aerogels oil product absorption multiplying power prepared by the present invention is at 15-40gg
-1between, compared to commercial oil sorbent mat material, its absorption multiplying power exceeds more than 2 times, and the cellulose aerogels material namely prepared by the present invention has better absorption property.As shown in Figure 3, be the absorption property to multi-solvents before and after 3wt.% cellulose aerogels material modification, after showing hydrophobically modified, the oil product absorption property of material is not a greater impact.
Cellulose aerogels material prepared by the present invention has excellent repeat performance.In order to investigate its repeat performance, we have employed ethanol as absorption object, as shown in Figure 4, for the absorption multiplying power of 3wt.% cellulose aerogels material considerable change does not occur after absorption-dry 15 times, illustrate that cellulose aerogels material of the present invention has excellent repeat performance.Meanwhile, by operations such as washing, solvent exchanges, excellent repeat performance is obtained to the adsorbate that other dissolve in ethanol.Trace it to its cause and can ascribe the internal structural characteristic of cellulose aerogels material to, be illustrated in figure 5 the scanning electron microscope collection of illustrative plates of 3wt.% cellulose aerogels material, visible cellulose aerogels material of the present invention is loose knit shape three-dimensional net structure, and the long cellulosic fibers of intersection is that aerogel material provides better elasticity and compression performance.
The present invention compares with existing preparation method with current material, has as follows a little:
1, starting material of the present invention are all green, non-toxic product.And Mierocrystalline cellulose is as the one of natural polysaccharide, and there is the features such as wide material sources, renewable, easy degraded.Superhydrophobic fibers element aerogel material compound current social Developing mainstream prepared by the present invention is described, simultaneously because the over-all properties of its excellence makes it have wide application prospect.
2, preparation method of the present invention and method of modifying simple, required product can be obtained fast.Simultaneously in preparation and modifying process without poisonous or other pollutant emissions, energy-conserving and environment-protective, the chemical aim of composite green.
3, the cellulose aerogels prepared by the present invention has higher absorption multiplying power and the repeat performance of excellence compared to commercial asphalt felt.Compared to the carbonaceous aerogel such as carbon nanotube, graphene oxide of bibliographical information, there is low cost, fast and the advantage such as environmental protection.It take polypropylene as the poor efficiency of representative, the commercial asphalt felt of secondary pollution that the cellulose aerogels material illustrating prepared by the present invention can replace current completely.
4, compared to other hydrophobically modified methods, designed by the present invention is that the Plasma modification method of properties-correcting agent has the advantages such as quick, efficient and energy-conservation with organosilane, and the hydrophobic modification techniques 3min that is less than consuming time, modified effect reaches super-hydrophobic standard.Be harmless modification simultaneously, internal structure and the absorption property of cellulose aerogels material can not be destroyed.
Accompanying drawing explanation
Fig. 1 is the variation relation that the density of cellulose aerogels material and porosity increase along with cellulose concentration;
Fig. 2 is water contact angle and the modification time relation of cellulose aerogels material;
Fig. 3 is the absorption multiplying power to different solvents before and after cellulose aerogels material modification;
Fig. 4 is the repeat performance of cellulose aerogels material;
Fig. 5 is the SEM collection of illustrative plates of cellulose aerogels material;
Embodiment
Embodiment 1
1, by after the rinse repeatedly of cotton linters cellulose distilled water, dehydrated alcohol, fully drying, the Mierocrystalline cellulose getting mass percent 3% joins (NaOH massfraction 7% in the NaOH/ urea/aqueous solution of-18 DEG C of precooling 20min, the massfraction 12% of urea, quality percentage ratio 78%).Stir 10min at 750r/min and obtain cellulose solution.Again cellulose solution is transferred to die needed in.
2, the 17wt.%H will configured
2sO
4solution, along in mould inner wall instillation cellulose solution, dropwises rear static 6h, treats complete gel, obtain cellulose aquagel.Re-use distilled water repetitive scrubbing, the salt that removing is residual, pure cellulose aquagel can be obtained.
3, cellulose aquagel will be obtained at-18 DEG C of freezing 24h, and obtain Mierocrystalline cellulose frozen glue, then through lyophilize, obtain cellulose aerogels.Wherein cryodesiccated temperature is-65 DEG C, and pressure is 10Pa.
4, prepared cellulose aerogels be placed on cold plasma modified equipment sample frame, vacuumize, when vacuum tightness touches the bottom, regulating piston, is filled into trimethylchlorosilane in reactor; When vacuum tightness reaches a constant value (100Pa), plasma power is adjusted to required value (100w), build-up of luminance, regulate matching box until reflective power is minimum, at the power of regulation with after discharging under the time (3min), super-hydrophobicity cellulose aerogels can be obtained.
5, result shows: prepared aerogel density is 0.0417gcm
-3, porosity is 97.3%.Water contact angle is 156 °, greasy dirt absorption multiplying power 16gg
-1, repeat performance is greater than 15 times.
Embodiment 2
1, by after plain for resin fibre distilled water, dehydrated alcohol rinse repeatedly, fully drying, the Mierocrystalline cellulose getting mass percent 2% joins (NaOH massfraction 7% in the NaOH/ urea/aqueous solution of-18 DEG C of precoolings, the massfraction 12% of urea, quality percentage ratio 79%).Stir 10min at 750r/min and obtain cellulose solution.Again cellulose solution is transferred to die needed in.
2, dehydrated alcohol is instilled in cellulose solution along mould inner wall, dropwise rear static 6h, treat complete gel, obtain cellulose aquagel.Re-use distilled water repetitive scrubbing, the salt that removing is residual, pure cellulose aquagel can be obtained.
3, cellulose aquagel will be obtained at-18 DEG C of freezing 24h, and obtain Mierocrystalline cellulose frozen glue, then through lyophilize, obtain cellulose aerogels.Wherein cryodesiccated temperature is-80 DEG C, and pressure is 1Pa.
4, prepared cellulose aerogels be placed on cold plasma modified equipment sample frame, vacuumize, when vacuum tightness touches the bottom, regulating piston, is filled into trimethylchlorosilane in reactor; When vacuum tightness reaches a constant value (100Pa), plasma power is adjusted to required value (100w), build-up of luminance, regulate matching box until reflective power is minimum, at the power of regulation with after discharging under the time (3min), super-hydrophobicity cellulose aerogels can be obtained.
5, result shows: prepared aerogel density is 0.0237gcm
-3, porosity is 98.5%.Water contact angle is 150 °, greasy dirt absorption multiplying power 24gg
-1, repeat performance is greater than 15 times.
Embodiment 3
1, by after plain for waste paper fibre distilled water, dehydrated alcohol rinse repeatedly, fully drying, the Mierocrystalline cellulose getting mass percent 3% joins (NaOH massfraction 8%, quality percentage ratio 89%) in the NaOH/ aqueous solution of-18 DEG C of precoolings.Stir 10min at 750r/min and obtain cellulose solution.Again cellulose solution is transferred to die needed in.
2, the 17wt.%H will configured
2sO
4solution, along in mould inner wall instillation cellulose solution, dropwises rear static 6h, treats complete gel, obtain cellulose aquagel.Re-use distilled water repetitive scrubbing, the salt that removing is residual, pure cellulose aquagel can be obtained.
3, cellulose aquagel will be obtained at-18 DEG C of freezing 24h, and obtain Mierocrystalline cellulose frozen glue, then through lyophilize, obtain cellulose aerogels.Wherein cryodesiccated temperature is-65 DEG C, and pressure is 10Pa.
4, prepared cellulose aerogels be placed on cold plasma modified equipment sample frame, vacuumize, when vacuum tightness touches the bottom, regulating piston, is filled into trimethylchlorosilane in reactor; When vacuum tightness reaches a constant value (100Pa), plasma power is adjusted to required value (100w), build-up of luminance, regulate matching box until reflective power is minimum, at the power of regulation with after discharging under the time (2min), super-hydrophobicity cellulose aerogels can be obtained.
5, result shows: prepared aerogel density is 0.02gcm
-3, porosity is 98.7%.Water contact angle is 149 °, greasy dirt absorption multiplying power 25gg
-1, repeat performance is greater than 15 times.
Embodiment 4
1, by after the rinse repeatedly of bacteria cellulose distilled water, dehydrated alcohol, fully drying, the Mierocrystalline cellulose getting mass percent 5% joins (NaOH massfraction 7% in the NaOH/ urea/aqueous solution of-18 DEG C of precoolings, the massfraction 10% of urea, quality percentage ratio 78%).Stir 10min at 750r/min and obtain cellulose solution.Again cellulose solution is transferred to die needed in.
2, methyl alcohol is instilled in cellulose solution along mould inner wall, dropwise rear static 10h, treat complete gel, obtain cellulose aquagel.Re-use distilled water repetitive scrubbing, the salt that removing is residual, pure cellulose aquagel can be obtained.
3, cellulose aquagel will be obtained at-18 DEG C of freezing 24h, and obtain Mierocrystalline cellulose frozen glue, then through lyophilize, obtain cellulose aerogels.Wherein cryodesiccated temperature is-80 DEG C, and pressure is 10Pa.
4, prepared cellulose aerogels be placed on cold plasma modified equipment sample frame, vacuumize, when vacuum tightness touches the bottom, regulating piston, is filled into METHYL TRICHLORO SILANE in reactor; When vacuum tightness reaches a constant value (100Pa), plasma power is adjusted to required value (250w), build-up of luminance, regulate matching box until reflective power is minimum, at the power of regulation with after discharging under the time (2min), super-hydrophobicity cellulose aerogels can be obtained.
5, result shows: prepared aerogel density is 0.065gcm
-3, porosity is 95.6%.Water contact angle is 161 °, greasy dirt absorption multiplying power 15gg
-1, repeat performance is greater than 15 times.
Embodiment 5
1, by after the rinse repeatedly of bagasse cellulose distilled water, dehydrated alcohol, fully drying, the Mierocrystalline cellulose getting mass percent 1% joins (NaOH massfraction 8% in the NaOH/ urea/aqueous solution of-18 DEG C of precoolings, the massfraction 14% of urea, quality percentage ratio 77%).Stir 10min at 750r/min and obtain cellulose solution.Again cellulose solution is transferred to die needed in.
2, by ketone oil mould inner wall instillation cellulose solution, dropwise rear static 3h, treat complete gel, obtain cellulose aquagel.Re-use distilled water repetitive scrubbing, the salt that removing is residual, pure cellulose aquagel can be obtained.
3, cellulose aquagel will be obtained at-18 DEG C of freezing 24h, and obtain Mierocrystalline cellulose frozen glue, then through lyophilize, obtain cellulose aerogels.Wherein cryodesiccated temperature is-60 DEG C, and pressure is 15Pa.
4, prepared cellulose aerogels be placed on cold plasma modified equipment sample frame, vacuumize, when vacuum tightness touches the bottom, regulating piston, is filled into METHYL TRICHLORO SILANE in reactor; When vacuum tightness reaches a constant value (100Pa), plasma power is adjusted to required value (60w), build-up of luminance, regulate matching box until reflective power is minimum, at the power of regulation with after discharging under the time (8min), super-hydrophobicity cellulose aerogels can be obtained.
5, result shows: prepared aerogel density is 0.015gcm
-3, porosity is 99%.Water contact angle is 146 °, greasy dirt absorption multiplying power 35gg
-1, repeat performance is greater than 15 times.
Embodiment 6
1, by after plain for pulp fibers distilled water, dehydrated alcohol rinse repeatedly, fully drying, the Mierocrystalline cellulose getting mass percent 5% joins (NaOH massfraction 9%, quality percentage ratio 86%) in the NaOH/ aqueous solution of-18 DEG C of precoolings.Stir 10min at 750r/min and obtain cellulose solution.Again cellulose solution is transferred to die needed in.
2, the 25wt.%H will configured
2sO
4solution, along in mould inner wall instillation cellulose solution, dropwises rear static 6h, treats complete gel, obtain cellulose aquagel.Re-use distilled water repetitive scrubbing, the salt that removing is residual, pure cellulose aquagel can be obtained.
3, cellulose aquagel will be obtained at-18 DEG C of freezing 24h, and obtain Mierocrystalline cellulose frozen glue, then through lyophilize, obtain cellulose aerogels.Wherein cryodesiccated temperature is-65 DEG C, and pressure is 15Pa.
4, prepared cellulose aerogels be placed on cold plasma modified equipment sample frame, vacuumize, when vacuum tightness touches the bottom, regulating piston, is filled into trimethylchlorosilane in reactor; When vacuum tightness reaches a constant value (100Pa), plasma power is adjusted to required value (100w), build-up of luminance, regulate matching box until reflective power is minimum, at the power of regulation with after discharging under the time (2min), super-hydrophobicity cellulose aerogels can be obtained.
5, result shows: prepared aerogel density is 0.071gcm
-3, porosity is 95.4%.Water contact angle is 158 °, greasy dirt absorption multiplying power 15gg
-1, repeat performance is greater than 15 times.
Above disclosedly be only preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (4)
1. a preparation method for superhydrophobic fibers element aerogel, is characterized in that comprising the following steps:
(1) cellosolve preparation:
With NaOH alkali systems for cellosolve system, to be made up of 7-14wt.%NaOH, 81-92wt.% aqueous solution or 6-8wt.%NaOH, 10-14wt.% urea, the 73wt.%-83wt.% aqueous solution form; The solvent of configuration is placed in-10 DEG C ~-20 DEG C precooling 10 ~ 30min;
(2) preparation of cellulose solution
Added to by 1%-5wt.% Mierocrystalline cellulose in the cellosolve that step (1) prepares, mechanical stirring obtains uniform cellulose solution;
(3) preparation of cellulose aquagel
Static 3-10h drip precipitation agent in the cellulose solution of step (2) after, treats complete gel, obtains cellulose aquagel; Finally wash away residual solvent with distilled water again, pure cellulose aquagel can be obtained; Wherein, precipitation agent comprises 3wt.%-25wt.%H
2sO
4solution, dehydrated alcohol, acetic acid, methyl alcohol, acetone one wherein;
(4) preparation of cellulose aerogels
Cellulose aquagel freezing at low temperatures formation Mierocrystalline cellulose frozen glue prepared by step (3), then obtain cellulose aerogels through lyophilize; Wherein lyophilize temperature-60 DEG C ~-80 DEG C, pressure is less than or equal to 15Pa;
(5) cold plasma hydrophobically modified
Cellulose aerogels step (4) obtained to be anhydrated point 60 DEG C of bakings, adopts cold plasma modified equipment to carry out hydrophobically modified to it; Cellulose aerogels is placed on specimen holder, vacuumizes, when vacuum tightness touches the bottom, properties-correcting agent medium is filled in reactor; When vacuum tightness reaches a constant value, plasma power is adjusted to required value, build-up of luminance, regulates matching box until reflective power is minimum, at the power of 60-250w with under the time of 1-15min after electric discharge, super-hydrophobicity cellulose aerogels can be obtained; Wherein properties-correcting agent mainly selects organosilane, comprises trimethylchlorosilane, METHYL TRICHLORO SILANE, perfluor silane, methyltrimethoxy silane, dimethyl silanol or trialkoxy silane wherein a kind of.
2. the preparation method of superhydrophobic fibers element aerogel as claimed in claim 1, is characterized in that: trimethylchlorosilane selected by described properties-correcting agent.
3. the preparation method of superhydrophobic fibers element aerogel as claimed in claim 1, is characterized in that: described cellulosic material selects M η≤1.2 × 10 especially
5mierocrystalline cellulose.
4. the application of super-hydrophobicity cellulose aerogels as claimed in claim 1 in sea pollution by oil leakage process, sewer oil recycling and other oily water separation field oily waste treatment.
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