CN106279772B - A kind of method of halloysite nanotubes surface in situ growth silica preparation hydridization filler - Google Patents
A kind of method of halloysite nanotubes surface in situ growth silica preparation hydridization filler Download PDFInfo
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- CN106279772B CN106279772B CN201610740697.5A CN201610740697A CN106279772B CN 106279772 B CN106279772 B CN 106279772B CN 201610740697 A CN201610740697 A CN 201610740697A CN 106279772 B CN106279772 B CN 106279772B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/12—Adsorbed ingredients, e.g. ingredients on carriers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- C08K9/00—Use of pretreated ingredients
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Abstract
The invention discloses a kind of methods of halloysite nanotubes surface in situ growth silica preparation hydridization filler.Halloysite nanotubes are distributed in solvent by this method first, then addition ammonium hydroxide and catalyst, after ultrasonic disperse, then add silicon source monomer, it is stirred to react 1-10 hours, centrifugal filtration, washs under the conditions of 30-80 DEG C, supernatant liquor is outwelled, dries, obtains hydridization filler.Compared with halloysite nanotubes, the specific surface area of hydridization filler prepared by the present invention dramatically increases, after being added in polymer as filler, the silica on surface is not in fall off in the process of polymer composites, more polymer molecular chains can be adsorbed, significantly increase the effect of organic/inorganic interface cohesion, and the irregular surface of hydridization filler provides more active groups for the processing of further functional surface, has potential application in the preparation field of functionalization filler and high-performance composite materials.
Description
Technical field
The present invention relates to the preparation technical fields of novel hybride filler, and in particular to a kind of halloysite nanotubes surface in situ
Grow the method for silica preparation hydridization filler.
Background technique
With the continuous development of material science, there is high-performance and multi-functional hybrid material to cause researcher and engineering
The extensive concern of personnel.Common inorganic filler can be divided into one-dimensional rod-like filler (such as carbon nanotube, Ai Luo according to its geometry
Stone nanotube etc.), two-dimensional sheet filler (such as graphene, montmorillonite) and three-dimensional manometer particle (such as silicon dioxide granule),
And the geometry and structure of inorganic filler have a very big impact the final performance of composite material.Therefore, researcher at present
It begins trying to prepare novel hydridization filler, this kind of novel hydridization using two or more fillers with different geometries
Filler can be realized good reinforcement and toughening effect in a polymer matrix.
Halloysite nanotubes are a kind of one-dimensional natural tubular fillers having compared with high length-diameter ratio, are commonly added to polymer
Mechanical property, thermal stability and the flame retardant property of composite material are improved in matrix, and its is cheap, deposits extensively in nature
It is being easy to industrialize, furthermore halloysite nanotubes also have important application in medicament slow release film, super hydrophobic material field.
Silica is a kind of important light reinforced filling, and mechanical property and dynamic property to composite material have very big side
It helps.Hydridization filler using one-dimensional halloysite nanotubes and three-dimensional silicon dioxide granule preparation not only has certain major diameter
Than and its specific surface area significantly improves, and is enhanced with the interface cohesion of polymeric matrix, is that a kind of ideal nanometer is filled out
Material.But it yet there are no currently with the method for growth in situ in novel hybride filler prepared by halloysite nanotubes nonloaded silica
Report.
Growth in situ is to carry out sol gel reaction on the surface of halloysite nanotubes using silicon source monomer, passes through chemistry
Key one layer of irregular silica dioxide granule on the area load of halloysite nanotubes.This method is easy to operate, not multiple
Miscellaneous preparation and post-processing step, it is easy to accomplish industrialization, and between the halloysite nanotubes-SiO 2 hybrid filler prepared
It is to be keyed by chemistry, silica dioxide granule will not fall off from halloysite nanotubes in subsequent Polymer Processing, have
There is very big potential using value.
Summary of the invention
It is an object of the invention to the methods using easy growth in situ, in the Surface Creation nanometer of halloysite nanotubes
Silica prepares a kind of hydridization filler.In this hydridization filler, silica is grown in galapectite by chemical bond and receives
The surface of mitron avoids and generates the separation that falls off in subsequent Polymer Processing, and this hydridization filler has irregularly
Surface, compared with halloysite nanotubes, specific surface area improves significantly, be also remarkably reinforced with the interface cohesion of polymeric matrix,
There is very high practical value in the modified field of high-performance composite materials, in addition, the irregular titanium dioxide silicon grain on galapectite surface
The presence of son, provides more reactive groups for the preparation of multi-functional filler, also has in functional new packing application field
There is very high application prospect.
Hydridization filler of the present invention is to be coagulated using silicon source monomer in the suspension of halloysite nanotubes by colloidal sol
Glue method hydrolytic condensation grows silicon dioxide granule on halloysite nanotubes surface, and then obtains this hydridization filler.
The purpose of the present invention is achieved through the following technical solutions.
A kind of method of halloysite nanotubes surface in situ growth silica preparation hydridization filler, comprising the following steps:
Step 1: first halloysite nanotubes (HNTs) are distributed in solvent, ammonium hydroxide and catalyst, ultrasonic disperse are added
Afterwards, silicon source monomer is added, is stirred to react under the conditions of 30-80 DEG C 1-10 hours；
Step 2: washing removes supernatant liquor, and drying obtains hydridization filler by first step products therefrom centrifugal filtration.
Further, the solvent is water, ethyl alcohol, toluene, acetone, petroleum ether, ethyl acetate, dimethylbenzene and pentamethylene
One or both of mixed solvent.
Further, the catalyst is dibutyl tin dilaurate, Bis(lauroyloxy)dioctyltin and tetrabutyl phosphonium bromide
One or more of ammonium.
Further, the silicon source monomer is one of methyl orthosilicate, ethyl orthosilicate (TEOS) and sodium metasilicate.
Further, it is 3%-10% that the halloysite nanotubes, which are distributed to the solid content in solvent,.
Further, the additional amount of the ammonium hydroxide accounts for the 5%-15% of solvent volume.
Further, the additional amount of the catalyst is 0.1-1.5ml.
Further, the silicon source monomer accounts for the 50wt%-75 wt% of halloysite nanotubes.
Further, the number of the washing is 3-8 times.
Further, the condition of the drying is to dry 8-24h in 50-100 DEG C of vacuum drying oven.
Compared with prior art, hydridization filler prepared by the present invention has the advantage that and characteristic:
(1) hydridization filler surface of the invention is irregular, and specific surface area significantly improves, and can be formed more with polymeric matrix
Strong interface cohesion effect；And the silica of surface attachment provides more active groups, for further surface it is modified and
The preparation of functionalization filler provides the foundation.
(2) halloysite nanotubes are realized using halloysite nanotubes-SiO 2 hybrid filler prepared by growth in situ
With the chemical bonds of silicon dioxide granule, avoids and occur the de- of silicon dioxide granule in subsequent polymer processing
It falls, expands the application range of the hydridization filler.
(3) growth in situ is a kind of preparation method easy to operate, does not need complicated preparation process and post-processing step,
And hydridization filler to prepare raw material naturally occurring, it is low in cost, be conducive to realize in high-performance and multi-functional hybrid material field
Industrialization.
Detailed description of the invention
Fig. 1 is halloysite nanotubes-SiO 2 hybrid filler SEM figure.
Fig. 2 is halloysite nanotubes-SiO 2 hybrid filler TEM figure.
Fig. 3 is the hot weight curve of halloysite nanotubes, silica and hydridization filler.
Fig. 4 is galapectite and galapectite-SiO 2 hybrid filler infrared spectrum.
Fig. 5 is the impact property figure of unsaturated polyester composite.
Fig. 6 is with the schematic illustration of halloysite nanotubes and silicon source single silica acid ethyl ester preparation hydridization filler.
Specific embodiment
In order to better understand the present invention, further careful say has been done to the present invention below with reference to embodiment and attached drawing
It is bright, but the scope of protection of present invention is not limited only to the range of embodiment statement.
Embodiment 1
The 5g halloysite nanotubes purified are distributed in the dehydrated alcohol of 100ml 95%, and add the ammonia of 5ml 25wt%
Then 0.2ml dibutyl tin dilaurate is added dropwise in water, the ultrasonic disperse 20min at 30 DEG C, at 40 DEG C, stir 0.5 hour,
Then the ethyl orthosilicate of 2.5g is added dropwise, after being added dropwise, is stirred to react at 40 DEG C 3 hours, product is centrifugated and uses ethyl alcohol
Washing five times is put into 80 DEG C of vacuum drying ovens and dries 10 hours, obtains halloysite nanotubes-SiO 2 hybrid filler.Fig. 6 be with
The schematic illustration of halloysite nanotubes and silicon source single silica acid ethyl ester preparation hydridization filler.Fig. 1 is halloysite nanotubes-two
The SEM figure of silicon hybridization filler is aoxidized, Fig. 2 is halloysite nanotubes-SiO 2 hybrid filler TEM figure.It can from figure
Out, it grown one layer of irregular silicon dioxide granule on the surface of halloysite nanotubes, and there's almost no individual angstrom of Lip river
Stone nanotube and silicon dioxide granule, so the simple and mechanical mixing of not instead of the two, silicon dioxide granule pass through chemical bond
Successful growth is on the surface of halloysite nanotubes.
Embodiment 2
In 250 ml beakers, 15g halloysite nanotubes are added, then addition 150ml dehydrated alcohol, 5ml deionized water,
Then 0.5ml dibutyl tin dilaurate is added dropwise in the ammonium hydroxide of 10.5 ml, 25 wt%, ultrasonic disperse 0.5 hour at 30 DEG C,
And 10g methyl orthosilicate is added dropwise, it reacts 10 hours, after centrifuge separation, and is washed 8 times with dehydrated alcohol, at 60 DEG C at 30 DEG C
Vacuum drying oven is dried 24 hours, and halloysite nanotubes-SiO 2 hybrid filler is obtained.Fig. 3 is halloysite nanotubes, titanium dioxide
The hot weight curve of silicon and hydridization filler, the Thermogravimetric Data of the figure show the silica adhered on the surface of halloysite nanotubes
Particle is 35wt%, and compared with the halloysite nanotubes of higher weightlessness and the silica of lower weightlessness, the hydridization filler of preparation has
There is medium thermal stability.
Embodiment 3
In 500ml three-necked flask, 20g halloysite nanotubes are distributed to 237.5ml dehydrated alcohol, are then added
The ammonium hydroxide of 15ml25wt%, 12.5ml deionized water, 0.1ml tin dilaurate dioctyl tin, the ultrasonic disperse 20min at 30 DEG C will
12.5g ethyl orthosilicate is added drop-wise in suspension, is stirred to react at 60 DEG C 8 hours, centrifuge washing 5 times, then true at 100 DEG C
It is dried 8 hours in empty baking oven, obtains halloysite nanotubes-SiO 2 hybrid filler；Fig. 4 is galapectite and galapectite-titanium dioxide
The infrared spectrum of silicon hybridization filler, as can be seen from the figure compared with pure halloysite nanotubes, Si-O key stretching vibration peak from
1093 cm-1Become 1082 cm-1, there are apparent chemical shift, and 754 cm-1With 794 cm-1The ratio at peak and
1030 cm-1With 1082-1093 cm-1The ratio of appearance is substantially reduced, this, which is primarily due to surface, grown one layer of titanium dioxide
Silicon particle, for the aluminium hydroxyl inside halloysite nanotubes, the ratio of silicone hydroxyl is greatly improved.
Embodiment 4
3g halloysite nanotubes are distributed in the dehydrated alcohol of 100ml 95%, and add the ammonium hydroxide of 15ml 25wt%,
Then 1.5ml Bis(lauroyloxy)dioctyltin is added dropwise in 15 min of ultrasonic disperse at 30 DEG C, at 80 DEG C, stirring 1 hour, then
The sodium metasilicate of 2.25g is added dropwise into mixture, after being added dropwise, stirs 8 hours, after centrifuge separation, washs 3 with dehydrated alcohol
It is secondary, it is put into 80 DEG C of vacuum drying ovens and dries 12 hours, obtain halloysite nanotubes-SiO 2 hybrid filler.
Embodiment 5
By taking unsaturated polyester resin matrix as an example, 5g halloysite nanotubes-SiO 2 hybrid for will being prepared in embodiment 1
Filler and the pure halloysite nanotubes of 5g are respectively added in 100g unsaturated polyester resin, are prepared for unsaturated polyester (UP) composite wood
Material, and influence of the hydridization filler to composite impact performance has been probed into, Fig. 5 is strong about unsaturated polyester composite impact
The data of degree, it can be seen from the figure that surface is attached compared with the unsaturated polyester composite of pure halloysite nanotubes toughening
The hydridization filler of silica there is more excellent impact property.
Claims (8)
1. a kind of method of halloysite nanotubes surface in situ growth silica preparation hydridization filler, which is characterized in that including
Following steps:
Step 1: first halloysite nanotubes are distributed in solvent, ammonium hydroxide and catalyst are added, after ultrasonic disperse, add silicon
Source monomer is stirred to react 1-10 hours under the conditions of 30-80 DEG C；
Step 2: washing removes supernatant liquor, and drying obtains hydridization filler by first step products therefrom centrifugal filtration；
The catalyst be one of dibutyl tin dilaurate, Bis(lauroyloxy)dioctyltin and tetrabutylammonium bromide with
On；
The silicon source monomer accounts for the 50wt%-75 wt% of halloysite nanotubes.
2. a kind of side of halloysite nanotubes surface in situ growth silica preparation hydridization filler according to claim 1
Method, which is characterized in that the solvent is in water, ethyl alcohol, toluene, acetone, petroleum ether, ethyl acetate, dimethylbenzene and pentamethylene
One or two kinds of mixed solvents.
3. a kind of side of halloysite nanotubes surface in situ growth silica preparation hydridization filler according to claim 1
Method, which is characterized in that the silicon source monomer is one of methyl orthosilicate, ethyl orthosilicate and sodium metasilicate.
4. a kind of side of halloysite nanotubes surface in situ growth silica preparation hydridization filler according to claim 1
Method, which is characterized in that it is 3%-10% that the halloysite nanotubes, which are distributed to the solid content in solvent,.
5. a kind of side of halloysite nanotubes surface in situ growth silica preparation hydridization filler according to claim 1
Method, which is characterized in that the additional amount of the ammonium hydroxide accounts for the 5%-15% of solvent volume.
6. a kind of side of halloysite nanotubes surface in situ growth silica preparation hydridization filler according to claim 1
Method, which is characterized in that the additional amount of the catalyst is 0.1-1.5ml.
7. a kind of side of halloysite nanotubes surface in situ growth silica preparation hydridization filler according to claim 1
Method, which is characterized in that the number of the washing is 3-8 times.
8. a kind of side of halloysite nanotubes surface in situ growth silica preparation hydridization filler according to claim 1
Method, which is characterized in that the condition of the drying is to dry 8-24h in 50-100 DEG C of vacuum drying oven.
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| CN106894107B (en) * | 2017-03-06 | 2022-03-04 | 东华大学 | Polyphenylene sulfide/modified halloysite nanotube hybrid composite fiber and preparation method thereof |
| CN107189102B (en) * | 2017-06-27 | 2019-05-17 | 华南理工大学 | A kind of hydridization filler support type anti-aging agent and the preparation method and application thereof |
| CN114149662B (en) * | 2021-12-03 | 2023-04-18 | 广东鹏泰建设工程有限公司 | Building energy-saving sound-insulation material and preparation method and application thereof |
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