CN104479173B - Halloysite nanotube and hydrotalcite compound and preparation method thereof - Google Patents
Halloysite nanotube and hydrotalcite compound and preparation method thereof Download PDFInfo
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- CN104479173B CN104479173B CN201410734292.1A CN201410734292A CN104479173B CN 104479173 B CN104479173 B CN 104479173B CN 201410734292 A CN201410734292 A CN 201410734292A CN 104479173 B CN104479173 B CN 104479173B
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Abstract
The invention relates to a halloysite nanotube and hydrotalcite compound and a preparation method of the halloysite nanotube and hydrotalcite compound. The compound is composed of two inorganic nano materials, namely halloysite nanotube and hydrotalcite, wherein the hydrotalcite grows on the surface of the halloysite nanotube in situ, and is in a flake structure. The preparation method specifically comprises the following steps: 1) dissolving a soluble magnesium salt and a soluble aluminum salt into deionized water, and stirring and mixing evenly at a room temperature; 2) adding the halloysite nanotube to the mixed salt liquid prepared from the step 1), and then ultrasonically dispersing to form a uniform liquid; 3) slowly adding a liquid prepared from sodium hydroxide and sodium carbonate to the liquid prepared from the step 2) in an intense agitation state, and putting into a drying oven after adding is ended, and standing and crystallizing for a certain period of time; and 4) filtering, washing and drying the sediments, and grinding to obtain the compound. The compound can be used as fire retardants of thermoplastic and thermosetting polymer materials, heat stabilizers of PVC-based high polymer materials and chlorine-resistant additives of polyurethane elastic fibers.
Description
Technical field
The invention belongs to inorganic non-metallic class technical field of function materials, more particularly to a kind of halloysite nanotubes brucite
Complex and preparation method thereof.
Background technology
Halloysite nanotubes (Halloysite Nanotubes, HNTs) are double-deck 1:1 type aluminosilicate (Al2Si2O5
(OH)4·nH2O), batched and formed by the alumina octahedral of internal layer and the silicon-oxy tetrahedron lattice mismatch of outer layer, with hollow nano
There is water of crystallization in tubular structure, its interlayer, be a kind of nanoclay material.Natural halloysite nanotubes, in China, reserves are rich
Richness, it is cheap and easy to get.In field of high polymer material processing, halloysite nanotubes can significantly improve the mechanicalness of macromolecular material
Can, a kind of method that such as Chinese patent 100348655C discloses halloysite nanotubes for preparing polymer composites adds
Plus halloysite nanotubes can significantly improve the mechanical property of polymer.In flame retardance of polymer field, halloysite nanotubes show
Good research and development and application prospect, such as Chinese patent 102153744A discloses a kind of halloysite nanotubes strengthens flame retardant type
The preparation method of anionic polymerization nylon, the patent is modified by halloysite nanotubes to anionic polymerization nylon, not only
Filling potentiation can be played, and fire-retardant effect can also be played.
Brucite also known as layered bi-metal oxide (Layered Double Hydroxide, LDH), are a kind of aniones
Type inorganic lamellar material, by positively charged layers of metal hydroxides plate and the anion and structural water molecule structure that are filled in interlayer
Into.Natural hydrotalcite (Mg6Al(OH)16CO3·4H2O) be magnalium composite hydroxide, exist in nature it is less, mainly by people
Work synthesizes.Brucite has various excellent performances：(1) fire resistance of polymer is improved：Such as Chinese patent 102617979A
A kind of Intercalation hydrotalcite fire retardant and preparation method thereof is disclosed, the fire retardant belongs to organic/inorganic composite, can be significantly improved
The intensity and fire resistance of macromolecular material；(2) heat stability of macromolecular material is improved：Such as Chinese patent 102531036B is public
A kind of PVC magnesium zinc-aluminium ternary houghite heat stabilizers and preparation method thereof are opened, it is thermally-stabilised that the product is used as polrvinyl chloride
Agent shows excellent heat stability；(3) chlorine-resistant property of polyurethaness elastic fiber is improved：Such as Chinese patent 101139751B
Disclose a kind of chlorine resistant polyurethaneurea elastic fiber and preparation method thereof, the patent by add the inorganic chlorine-resistant agent of hydrotalcite come
Improve the chlorine resistance and uniformity of polyurethaneurea elastic fiber.
Halloysite nanotubes (HNTs) and brucite (LDH) in polymer modification existing more theoretical research and
Production application, and the two is prepared inorganic/inorganic composite and not yet had been reported that by the way that chemical mode is compound.The invention provides
A kind of preparation method of halloysite nanotubes hydrotalcite complex, innovation with halloysite nanotubes cheap and easy to get as substrate,
Brucite growth in situ, using halloysite nanotubes and the synergism of brucite, is effectively solved in the surface of halloysite nanotubes
Thermoplasticity of having determined and the fire-retardant of thermosetting family macromolecule material, the heat stability of PVC based high molecular materials and polyurethaness elasticity
The technical problems such as the chlorine resistance of fiber.Additionally, preparation method involved in the present invention also have it is simple to operate, mild condition etc. is excellent
Point.
The content of the invention
Technical problem：It is an object of the invention to solve the deficiencies in the prior art, there is provided a kind of halloysite nanotubes neatly
, used as substrate, brucite growth in situ is in the table of halloysite nanotubes for the preparation method of stone complex, wherein halloysite nanotubes
Face, in the form of sheets structure.The two can effectively improve the resistance of thermoplasticity and thermosetting family macromolecule material by playing synergism
The technical problems such as the chlorine-resistant property of combustion performance, the thermal stability of PVC based high molecular materials and polyurethaness elastic fiber.
Technical scheme：A kind of halloysite nanotubes hydrotalcite complex that the present invention is provided and preparation method thereof, its feature
It is to include two kinds of inorganic components of halloysite nanotubes and brucite, wherein described brucite is assembled in halloysite nanotubes table
Face, in the form of sheets structure.
A kind of halloysite nanotubes hydrotalcite complex that the present invention is provided and preparation method thereof, the preparation method includes
Following several steps：
1) magnesium salt and aluminium salt of solubility are dissolved in deionized water, are uniformly mixed under room temperature；
2) to step 1) obtained by mixing salt solution in add halloysite nanotubes, then ultrasonic disperse forms uniform molten
Liquid；
3) under strong stirring state, to step 2) obtained by solution in be slowly added to by sodium hydroxide and sodium carbonate group
Into solution, addition terminate after, be placed on static crystallization certain hour in baking oven；
4) precipitate is filtered, is washed, be dried, complex is obtained after grinding；
In preparation method of the present invention, step 1) described in the concentration of soluble magnesium salt be 0.02～1.5mol/L, magnesium from
Sub is 2～4 with aluminum ions mol ratio:1.
In preparation method of the present invention, step 2) described in halloysite nanotubes be in long tubular structure, halloysite nanotubes
It is 1 with deionized water quality ratio:1000～1:50.
In preparation method of the present invention, step 3) described in sodium hydroxide and sodium carbonate composition solution in, sodium hydroxide
Concentration be 0.05～4mol/L, the concentration of sodium carbonate is 0.005～0.6mol/L.
In preparation method of the present invention, step 3) described in static crystallization temperature be 60～100 DEG C, crystallization time is 8～
24h。
Beneficial effect：The present invention has the advantage that and effect compared with current material：
(1) using the larger specific surface area of natural halloysite nanotubes and surface elecrtonegativity, with halloysite nanotubes as base
Body, with laminated structure growth in situ in the surface of halloysite nanotubes, wherein brucite is combined brucite with halloysite nanotubes
It is firmly difficult for drop-off.
(2) halloysite nanotubes hydrotalcite complex has the performance of halloysite nanotubes and brucite concurrently, and the two plays association
Same-action, can serve as fire retardant, heat stabilizer and resistance to chlorine additive.
Description of the drawings：
Fig. 1 prepares schematic diagram for halloysite nanotubes hydrotalcite complex.
Fig. 2 is the XRD spectra of halloysite nanotubes hydrotalcite complex prepared by embodiment 1.
Specific embodiment
Describe the present invention in detail with example below, but these examples must not be interpreted as going up the limit to the present invention in all senses
System.
Embodiment 1：
(1) MgCl is taken2·6H2O (0.004mol) and AlCl3·6H2O (0.002mol) is dissolved in 200ml deionized waters,
It is uniformly mixed under room temperature, wherein the concentration of soluble magnesium salt is 0.02mol/L, and the concentration of aluminum soluble salt is 0.01mol/
L；
(2) 0.2g halloysite nanotubes are added in above-mentioned mixing salt solution, wherein halloysite nanotubes and deionization
The mass ratio of water is 1:1000, after ultrasonic disperse 60min, form homogeneous solution；
(3) by 0.012mol NaOH and 0.001mol Na2CO3In being dissolved in 200ml deionized waters, then in strong stirring
Under state, be slowly dropped to step 2) prepared by mixed solution in；1h is persistently stirred after completion of dropwise addition, then by its
Static crystallization 24h at 60 DEG C；
(4) above-mentioned precipitate is filtered, washing is dried, complex is obtained after grinding, wherein magnalium mol ratio is 2:1.
Embodiment 2：
(1) MgCl is taken2·6H2O (0.06mol) and AlCl3·6H2O (0.02mol) is dissolved in 120ml deionized waters, room
It is uniformly mixed under temperature, wherein the concentration of soluble magnesium salt is 0.5mol/L, and the concentration of aluminum soluble salt is 0.167mol/L；
(2) 1.2g halloysite nanotubes are added in above-mentioned mixing salt solution, wherein halloysite nanotubes and deionization
The mass ratio of water is 1:100, after ultrasonic disperse 80min, form homogeneous solution；
(3) by 0.16mol NaOH and 0.01mol Na2CO3In being dissolved in 120ml deionized waters, then in strong stirring shape
Under state, be slowly dropped to step 2) prepared by mixed solution in；1.5h is persistently stirred after completion of dropwise addition, then by its
Static crystallization 12h at 80 DEG C；
(4) above-mentioned precipitate is filtered, washing is dried, complex is obtained after grinding, wherein magnalium mol ratio is 3:1.
Embodiment 3：
(1) MgCl is taken2·6H2O (0.15mol) and AlCl3·6H2O (0.0375mol) is dissolved in 100ml deionized waters,
It is uniformly mixed under room temperature, wherein the concentration of soluble magnesium salt is 1.5mol/L, and the concentration of aluminum soluble salt is 0.375mol/
L；
(2) 2g halloysite nanotubes are added in above-mentioned mixing salt solution, wherein halloysite nanotubes and deionized water
Mass ratio be 1:50, after ultrasonic disperse 100min, form homogeneous solution；
(3) by 0.375mol NaOH and 0.01875mol Na2CO3In being dissolved in 100ml deionized waters, then stir in strength
Under mixing state, be slowly dropped to step 2) prepared by mixed solution in；2h is persistently stirred after completion of dropwise addition, then by it
Static crystallization 8h at 100 DEG C；
(4) above-mentioned precipitate is filtered, washing is dried, complex is obtained after grinding, wherein magnalium mol ratio is 4:1.
Claims (2)
1. a kind of halloysite nanotubes hydrotalcite complex, it is characterised in that the complex includes halloysite nanotubes and brucite
Two kinds of inorganic components, wherein described brucite in the form of sheets structure is assembled in halloysite nanotubes surface.
2. a kind of preparation method of halloysite nanotubes hydrotalcite complex according to claim 1, it is characterised in that institute
Stating preparation method includes following several steps：
1) magnesium salt and aluminium salt of solubility are dissolved in deionized water, are uniformly mixed under room temperature, mixing salt solution is obtained；
2) to step 1) obtained by mixing salt solution in add halloysite nanotubes, then ultrasonic disperse formed homogeneous solution；
3) under strong stirring state, to step 2) obtained by solution in be slowly added to what is be made up of sodium hydroxide and sodium carbonate
Solution, after addition terminates, is placed on static crystallization in baking oven；
4) precipitate is filtered, is washed, be dried, halloysite nanotubes hydrotalcite complex is obtained after grinding；
Wherein, step 1) described in soluble magnesium salt concentration be 0.02～1.5mol/L, magnesium ion and aluminum ions mol ratio
For 2～4:1；
Step 2) described in halloysite nanotubes be in long tubular structure, halloysite nanotubes and deionized water quality ratio are 1:
1000～1:50；
Step 3) described in sodium hydroxide and sodium carbonate composition solution in, the concentration of sodium hydroxide is 0.05～4mol/L, carbon
The concentration of sour sodium is 0.005～0.6mol/L；Described oven temperature is 60～100 DEG C, and static crystallization time is 8～24h.
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| CN106751144A (en) * | 2016-11-29 | 2017-05-31 | 广东联塑科技实业有限公司 | A kind of drainpipe environment-friendlyflame-retardant flame-retardant polyvinyl chloride composition and preparation method thereof |
| CN108018617B (en) * | 2017-12-06 | 2020-06-23 | 杭州皮克新材料科技有限公司 | Preparation method of moisture-absorbing antistatic polyester |
| CN111153420B (en) * | 2020-01-14 | 2021-04-06 | 北京化工大学 | Magnesium-aluminum hydrotalcite nanotube and preparation method thereof |
| CN112886029B (en) * | 2021-01-12 | 2022-05-17 | 深圳清华大学研究院 | Preparation and application of bifunctional oxygen electrocatalyst with hollow carbon nanotube as carrier |
| CN115382521B (en) * | 2022-08-05 | 2023-09-29 | 浙江工业大学 | Halloysite-based hydrotalcite-like composite material and preparation method and application thereof |
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| CN101066526A (en) * | 2007-04-20 | 2007-11-07 | 北京化工大学 | Heterostructure material of hydrotalcite and carbon nanotube and its prepn process |
| CN101314132A (en) * | 2008-07-04 | 2008-12-03 | 北京化工大学 | Carbon nano-tube composite material and uses for photocatalysis degradation |
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| CN101066526A (en) * | 2007-04-20 | 2007-11-07 | 北京化工大学 | Heterostructure material of hydrotalcite and carbon nanotube and its prepn process |
| CN101314132A (en) * | 2008-07-04 | 2008-12-03 | 北京化工大学 | Carbon nano-tube composite material and uses for photocatalysis degradation |
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| 埃洛石纳米管的应用研究现状;马智，等;《化学进展》;20120331;第24卷(第2/3期);275-283 * |
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Address after: No. 1788, Dongshan Economic Development Zone, Ruian, Wenzhou, Zhejiang Patentee after: Huafeng Chemical Co.,Ltd. Address before: No. 1788, Dongshan Economic Development Zone, Ruian, Wenzhou, Zhejiang Patentee before: ZHEJIANG HUAFENG SPANDEX Co.,Ltd. |