CN107324286A - A kind of method of stable dispersion metal oxide nanoparticles in aqueous phase - Google Patents
A kind of method of stable dispersion metal oxide nanoparticles in aqueous phase Download PDFInfo
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- CN107324286A CN107324286A CN201710439122.4A CN201710439122A CN107324286A CN 107324286 A CN107324286 A CN 107324286A CN 201710439122 A CN201710439122 A CN 201710439122A CN 107324286 A CN107324286 A CN 107324286A
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- metal oxide
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/14—Methods for preparing oxides or hydroxides in general
- C01B13/145—After-treatment of oxides or hydroxides, e.g. pulverising, drying, decreasing the acidity
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Abstract
The invention belongs to nano material chemical industry, field of food application, and in particular to a kind of method of stable dispersion metal oxide nanoparticles in aqueous phase.The present invention carrys out dispersing metal oxides nano particle by using nano-cellulose as dispersing aid, method is easy to operate, with low cost and green non-pollution, its metal oxide nanoparticles dispersion liquid good dispersion prepared, stability are high, follow-up use and storage for a long time beneficial to dispersion liquid, the service efficiency of metal oxide nanoparticles is improved, and further widens its application field.
Description
Technical field
The invention belongs to nano material chemical industry, field of food application, and in particular in a kind of aqueous phase stable dispersion gold
Belong to the method for oxide nano particles.
Background technology
Nano material due to characteristics such as nanometer size effect, skin effect, quantum size effects, with special mechanics,
Electricity, magnetic, optical property and chemism.Metal oxide nanoparticles are the nano materials that a class has extensive use,
There is wide application value and prospect in fields such as chemical industry, electronics, food, biology, medical science.
As titanium dioxide nanoparticle has a most valuable optical property, very high chemical stability, heat endurance, nothing
Toxicity, Superhydrophilic, non-migratory, are widely used in automotive field, anti-ultraviolet material, weaving, photocatalysis catalyst, sun-proof
Frost, coating, paper industry etc.；Nano zine oxide can be used for ultraviolet light masking material in fields such as weaving, coating, antiseptic, glimmering
Luminescent material, catalysis material etc.；Nanometer tungsten oxide also has in terms of discoloration, sensing, photocatalysis and is widely applied and grinds very much
Study carefully；Vanadium oxide nanoparticle is applied in chemical industry synthesis and desulfurization again as new catalyst；Nano-nickel oxide is same in catalytic field
And electronic applications have great application prospect.
In the final application of metal oxide nanoparticles, application of the good dispersity of particle closer to reality
State, therefore its is well dispersed and stable dispersion liquid has extensive use.But be due to nano particle specific surface area it is larger,
Surface can be high, simultaneously because intermolecular force between particle, nano particle is easily reunited.Therefore good dispersion property is prepared
And stable metal oxide nanoparticles dispersion liquid, it can effectively solve the problem that it easily reunites in application and draws hydraulic performance decline, receive
The problems such as meter Xiao Ying plays insufficient.
When the metal oxide nanoparticles of current chemical industry and field of food are applied, typically using organic solvent, You Jihuo
Inorganic dispersion aids, surfactant carry out surface modification to metal oxide nanoparticles, carry out dispersing metal oxides and receive
Rice grain.But it is difficult to there is cleaning, and cost is high, the deficiency such as, stability irritant to human body is poor.
Nano-cellulose (CNF) and its derivative in recent years, because its draw ratio is high, specific surface area is big, mechanical strength
Height, is once used to strengthen composite as green packing material.In addition with applying in terms of electric thin field
Research report (such as polyaniline, CNT, graphene are the conducting film of matrix).
The content of the invention
There is problem or deficiency for above-mentioned, for the scattered cleaning of solution metal oxide nanoparticles is difficult, cost is high, divide
Dissipate stability difference and to human body it is irritant the problem of, the invention provides stable dispersion metal oxide nano in a kind of aqueous phase
The method of particle.
Comprise the following steps that：
Step 1：Nano-cellulose is weighed, deionized water is added, stirs and evenly mixs；It is subsequently placed on centrifuge, 1000~
2~5min is centrifuged under conditions of 3000 turns/min, it is 0.2%~1% point to configure nano-cellulose mass percentage content
Dispersion liquid, it is standby；
Step 2：Metal oxide nanoparticles are weighed, deionized water is added, then stirs, tentatively disperseed
0.5wt%~2wt% metal oxide nanoparticles aqueous dispersions；
Step 3：Nano-cellulose aqueous dispersions made from step 1 are added into preliminary dispersed metal oxidation made from step 2
In thing aqueous dispersions, proportion≤1 of CNF and metal oxide nanoparticles:5, CNF whole mixed liquor mass ratio >=
0.2wt%, then mechanical agitation is well mixed, obtains well dispersed and stable metal oxide dispersion.
Nano-cellulose source is wood pulp, cotton, sisal hemp or bacterium in above-mentioned steps 1.
A diameter of 4~10nm of nano-cellulose in above-mentioned steps 1, length is 1000~3000nm.
Metal oxide nanoparticles are titanium dioxide, tungstic acid, nickel oxide, vanadium oxide or oxidation in above-mentioned steps 2
Zinc nanoparticles.
The size of metal oxide nanoparticles is 5~100nm in above-mentioned steps 2.
The present invention to form mutually exclusive electric double layer between nano material by CNF addition and obvious steric hindrance is imitated
Should, so that metal oxide nanoparticles can be stably dispersed in water.Nano-cellulose itself carries-COO-Na+Base
Group, when nanofiber dispersion is in water, due to the ionization of carboxyl, makes the repulsive interaction of formation electric double layer between fiber, makes
Obtaining CNF can stably be dispersed in water, and this helps dispersion effect to provide the foundation for CNF's.The surface of CNF fibers has amphiphilic
Property, it can form hydrophobic interaction with hydrophobic material, so CNF can be together with dewatering nano material be adsorbed onto.By
There is larger draw ratio in CNF, and be made up of in microstructure the crystalline region and amorphous area of cellulose, cause to exist on fiber and permitted
The weakness of many mechanics so that easily common tangle occurs fiber itself for bending and other nano materials.Eventually through churned mechanically
Mixed liquor is uniformly dispersed by mode.
The present invention is due to using nanofiber usually dispersing metal oxides nano particle, and its dispersion effect is well and stably
Property it is high, technological operation is simple, and easy scale, environmental protection is nontoxic, has in the application aspect of chemical industry and food great
Value and significance.
In summary, the present invention has preparation method easy to operate, with low cost and green non-pollution, its metal prepared
Oxide nano particles dispersion liquid good dispersion, stability are high, follow-up use and storage for a long time beneficial to dispersion liquid, improve
The service efficiency of metal oxide nanoparticles, and further widen its application field.
Brief description of the drawings
Fig. 1 is the nanoparticulate dispersion comparison diagram in kind of non-bonus point powder, addition SDS and embodiment；
Fig. 2 is that the nanoparticulate dispersion of non-bonus point powder, addition SDS and embodiment places the state vs in kind after 6h
Figure.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail.
Step 1：A diameter of 4~10nm is weighed, length is 1000~3000nm nano-cellulose 0.3g, deionized water
50g, is put into the beaker that capacity is 100ml.Magnetic stir bar is added, closing beaker mouthful is positioned on magnetic stirrer and started
Stirring.Stir speed (S.S.) is 800 turns/min, and mixing time is 10min.It is subsequently placed on centrifuge, in 3000 turns/min condition
Lower centrifugation 2min, configures the dispersion liquid that nanofiber cellulose content is 0.3wt%, standby；
Step 2：Titania nanoparticles 1g, deionized water 50g that granular size is 5~100nm are weighed, is added to
In 100ml beakers, it is assembled on homogenizer and is stirred, stir speed (S.S.) is 1000 turns/min, and mixing time is 10min,
The titanium dioxide water-dispersion liquid tentatively disperseed；
Step 3：50ml nano-cellulose aqueous dispersions are added to 50ml preliminary dispersing metal oxides aqueous dispersions
In, the mechanical agitation 15min under conditions of 1200 turns/min obtains metal oxide dispersion, as depicted in figs. 1 and 2.
The titanium dioxide metal oxide nanoparticles dispersion phase that the present embodiment is prepared is compared under equal conditions,
It is not added with dispersant and adds the dispersion liquid that lauryl sodium sulfate (SDS) dispersant is obtained, dispersiveness is more preferably (such as Fig. 1 institutes
Show)；Stability is higher (as shown in Figure 2).In summary, the present invention can obtain good dispersion and long-time stable is without sedimentation
Metal oxide nanoparticles suspension liquid of aqueous phase.
Claims (5)
1. the method for stable dispersion metal oxide nanoparticles, is comprised the following steps that in a kind of aqueous phase：
Step 1：Nano-cellulose CNF is weighed, ionized water is added, stirs and evenly mixs；It is subsequently placed on centrifuge, 1000~3000
Turn/min under conditions of centrifuge 2~5min, configure nano-cellulose mass percentage content be 0.2%~1% dispersion liquid,
It is standby；
Step 2：Metal oxide nanoparticles are weighed, ionized water is added, then stirs, tentatively disperseed
0.5wt%~2wt% metal oxide nanoparticles aqueous dispersions；
Step 3：Nano-cellulose aqueous dispersions made from step 1 are added into preliminary dispersing metal oxides water made from step 2
In dispersion liquid, proportion≤1 of CNF and metal oxide nanoparticles:5, CNF whole mixed liquor mass ratio >=0.2wt%,
Then mechanical agitation is well mixed, and obtains the metal oxide nanoparticles dispersion liquid of stable dispersion in aqueous phase.
2. the method for stable dispersion metal oxide nanoparticles in aqueous phase as claimed in claim 1, it is characterised in that：The step
Nano-cellulose source is wood pulp, cotton, sisal hemp or bacterium in rapid 1.
3. the method for stable dispersion metal oxide nanoparticles in aqueous phase as claimed in claim 1, it is characterised in that：The step
A diameter of 4~10nm of nano-cellulose in rapid 1, length is 1000~3000nm.
4. the method for stable dispersion metal oxide nanoparticles in aqueous phase as claimed in claim 1, it is characterised in that：The step
Metal oxide nanoparticles are titanium dioxide, tungstic acid, nickel oxide, vanadium oxide or Zinc oxide nanoparticle in rapid 2.
5. the method for stable dispersion metal oxide nanoparticles in aqueous phase as claimed in claim 1, it is characterised in that：The step
The size of metal oxide nanoparticles is 5~100nm in rapid 2.
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| CN201710439122.4A CN107324286A (en) | 2017-06-12 | 2017-06-12 | A kind of method of stable dispersion metal oxide nanoparticles in aqueous phase |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107936433A (en) * | 2017-11-23 | 2018-04-20 | 苏州甫众塑胶有限公司 | A kind of preparation method that light-scattering material is blended |
| CN107955363A (en) * | 2017-12-06 | 2018-04-24 | 陕西科技大学 | A kind of method of ZnO@NCC compound particles modification biological base water polyurethane lotion and products thereof |
| CN114405304A (en) * | 2022-02-17 | 2022-04-29 | 河北科技大学 | Composition for dispersing nickel oxide in organic solvent and dispersing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1863498A (en) * | 2003-09-18 | 2006-11-15 | Fmc有限公司 | Method for dispersing metal oxides |
| CN103318945A (en) * | 2013-07-11 | 2013-09-25 | 苏州大学 | Preparation method of colloidal solution of nano-ZnO |
| CN103693674A (en) * | 2013-11-27 | 2014-04-02 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of nanometer zinc oxide composite dispersion liquid |
-
2017
- 2017-06-12 CN CN201710439122.4A patent/CN107324286A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1863498A (en) * | 2003-09-18 | 2006-11-15 | Fmc有限公司 | Method for dispersing metal oxides |
| CN103318945A (en) * | 2013-07-11 | 2013-09-25 | 苏州大学 | Preparation method of colloidal solution of nano-ZnO |
| CN103693674A (en) * | 2013-11-27 | 2014-04-02 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of nanometer zinc oxide composite dispersion liquid |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107936433A (en) * | 2017-11-23 | 2018-04-20 | 苏州甫众塑胶有限公司 | A kind of preparation method that light-scattering material is blended |
| CN107955363A (en) * | 2017-12-06 | 2018-04-24 | 陕西科技大学 | A kind of method of ZnO@NCC compound particles modification biological base water polyurethane lotion and products thereof |
| CN107955363B (en) * | 2017-12-06 | 2020-10-16 | 陕西科技大学 | Method for modifying bio-based aqueous polyurethane emulsion by ZnO/NCC nano composite particles and product thereof |
| CN114405304A (en) * | 2022-02-17 | 2022-04-29 | 河北科技大学 | Composition for dispersing nickel oxide in organic solvent and dispersing method |
| CN114405304B (en) * | 2022-02-17 | 2023-08-08 | 河北科技大学 | Composition for dispersing nickel oxide in organic solvent and dispersing method |
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