CN107746481A - A kind of NR latex/clay organic aerogel composite and preparation method thereof - Google Patents
A kind of NR latex/clay organic aerogel composite and preparation method thereof Download PDFInfo
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- CN107746481A CN107746481A CN201710872624.6A CN201710872624A CN107746481A CN 107746481 A CN107746481 A CN 107746481A CN 201710872624 A CN201710872624 A CN 201710872624A CN 107746481 A CN107746481 A CN 107746481A
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- latex
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- aerogel composite
- organic aerogel
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
- C08L7/02—Latex
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of NR latex/clay organic aerogel composite and preparation method thereof, by the way that NR latex/clay water slurry is carried out into liquid-nitrogen freeze drying, make NR latex/clay organic aerogel composite presoma, then adopt water-dispersible vulcanizing agent to be crosslinked it as crosslinking agent, aeroge is made.Compared with existing organic foam heat-barrier material, material of the present invention has the advantages that low-density, lower thermal conductivity, high porosity, high intensity；Material Applicable temperature of the present invention is wide and the occasion of high-strength characteristic is required to heat-barrier material, is the preferable heat-barrier material for building Decoration Industry.
Description
Technical field
The present invention relates to a kind of organic aerogel composite and preparation method thereof, more particularly, to a kind of NR latex/viscous
Native organic aerogel composite and preparation method thereof.
Background technology
Aeroge is mutually to be coalesced to form nanoporous network structure by colloidal particle or high-polymer molecular, and in hole
A kind of high dispersive solid-state material full of gaseous state decentralized medium, because it has, density is low, specific surface area is big, porosity is high, thermal conductivity
Rate is low and the outstanding feature such as low-resistivity, in insulation, sound insulation, environmental protection, catalysis, absorption and high-performance capacitor etc. with wide
Application prospect, aeroge is a kind of lightweight, porous, amorphous solid material, and particle size is between 1-100nm
Typical nano material, its porosity are up to 99.8%, the minimum reachable 3kgm of density-3, specific surface area is in 1000m2·g-1With
On, thermal conductivity is very low, and room temperature in vacuo thermal conductivity can be with as little as 0.001wm-1·K-1.It is considered as that heat-proof quality is most excellent
Solid-state material, right and wrong are often with the high-performance insulation material for having application prospect.
That the application study of heat-barrier material aspect is most at present is inorganic oxide (such as SiO2、Al2O3) aeroge and using nothing
The composite of machine fiber or inorganic porous carrier as reinforcement, although inorganic material has higher heat resistance, such as
Aerosil forms secondary spherical particle in the form of chain pearl by the Si-O-Si keys of weak compliance and is interconnected to form
Three-dimensional net structure, this structure cause aeroge to be easily broken off crushing under external force, and structure collapses, pliability is poor, should
With difficulty, itself there is great fragility, and preparation process can inevitably crack inorganic oxides disclosed at present
Thing aeroge and ceramic fibre or porous carrier reinforcement, have that dust is big, has stimulation, material body solid to skin and respiratory tract
The shortcomings of bulk thermal conductivities are higher, so as to which the massive material for being widely used in heat-insulated field can not be prepared.
The problem of existing for prior art, the present invention provide a kind of NR latex/clay soil clay soil silica aerogel composite, and this is organic
Aeroge it is blockiness it is good, have that loose structure, specific surface area are high, pliability is good, thermal conductivity is low, translucency is adjustable, be low inward turning
Turn the characteristics of C-S keys of potential barrier are cross-linked to form three-dimensional net structure.The conventional drying means of organogel is supercritical drying at present
It is dry, as manufactured carbon aerogels method therefor and CN101146674A manufacture graphene crosslinkings in Chinese patent CN102092708A
Type organic aerogel method is all supercritical drying, and supercritical drying can make the network structure that aeroge remains intact, will not
Cave in rupture, the characteristics of sample structure finally given is good, light, and pore structure is excellent.But drying equipment is expensive, preparation flow length,
It is unfavorable for mass producing；Freeze-drying is also known as lyophilization.Sample will be contained to be chilled to below freezing point, make freeze forming, so
The drying means to be distilled afterwards under high vacuum, good skeleton structure can be kept when drying, manufacturing process is relatively easy, cost
It is relatively low.Admittedly choosing freeze-drying prepares organic aerogel.
The content of the invention
Good it is an object of the invention to provide a kind of heat-proof quality, construction usage safety and environmental protection, preparation cost is low, existing height
Compressive strength has NR latex/clay organic aerogel composite of lower thermal conductivity and preparation method thereof again.
Further aim of the present invention be to provide it is a kind of simple to equipment requirement, production operation safety, technique it is simple and
NR latex/clay organic aerogel composite of efficiency high and preparation method thereof.
The purpose of the present invention is achieved through the following technical solutions：A kind of NR latex/clay organic aerogel composite wood
Material, the material dissipate the mixed of vulcanizing agent by the moisture of the NR latex containing 2.5wt%-10wt%, 10wt% clay and 2wt%
Heshui suspension carries out liquid-nitrogen freeze drying, then be prepared by 90 DEG C of heating 1h.
The average grain diameter of described NR latex is 100nm, solid content 60%, and clay is sodium-based montmorillonite, average grain diameter
For 12nm.
The condition of described liquid-nitrogen freeze drying is 25 DEG C, pressure 10bar of temperature, 4 days time.
The solid content that described moisture dissipates vulcanizing agent is 5%, by sulphur, Vulcanization accelerator TMTD, zinc oxide and hydroxylated cellulose
Sodium forms, part by weight 5: 1: 1: 2.
Further aim of the present invention is achieved through the following technical solutions, and it comprises the following steps：
Step 1：Clay is weighed, sodium-based montmorillonite clay is scattered in deionized water, it is uniformly mixing to obtain clay water and hangs
Floating solution.
Step 2：NR latex is added into solution and moisture dissipates vulcanizing agent, stirring 20min makes NR latex uniformly be scattered in
In clay water aaerosol solution, NR latex/clay water slurry is obtained；
Step 3：Suspension is transferred to cylinder polystyrene bottle, being placed in liquid-nitrogen freeze drying machine makes it freeze immediately, connects
The upper drying 4 days, pressure 10bar in the freeze dryer of 25 DEG C of temperature,；
Step 4：Step 3 is obtained into sample, 90 DEG C of heating 1h, obtains NR latex/clay organic aerogel composite.
Embodiment：
A kind of NR latex/clay organic aerogel composite and preparation method thereof, comprises the following steps：
Step 1：The sodium-based montmorillonite clay that average grain diameter is 12nm is weighed by certain part by weight, clay is distributed to
In deionized water, 10wt% clay water aaerosol solution is uniformly mixing to obtain；
Step 2：It is 100nm that 2.5wt%-10wt% average grain diameters are added into suspension, and solid content is 60% NR glue
Breast, the moisture for being subsequently added into 2wt% dissipate vulcanizing agent, and moisture dissipates vulcanizing agent by sulphur of the part by weight for 5: 1: 1: 2, accelerator
TMTD, zinc oxide and hydroxy cellulose sodium composition, solid content 5wt%, stirring 20min make NR latex uniformly be scattered in clay
In aqueous suspension solution, NR latex/clay water slurry is obtained；
Step 3：Suspension is transferred to cylinder polystyrene bottle, being placed in liquid-nitrogen freeze drying machine makes it freeze immediately, connects
The upper drying 4 days in the freeze dryer of 25 DEG C of temperature, pressure 10bar；
Step 4：Step 3 is obtained into sample, 90 DEG C of heating 1h, obtains NR latex/clay organic aerogel composite.
Now by following examples, the invention will be further described.
Embodiment 1
Step 1：The sodium-based montmorillonite clay that average grain diameter is 12nm is weighed in the ratio of certain part by weight, clay is added and gone
In ionized water, 10wt% clay water aaerosol solution is uniformly mixing to obtain,
Step 2：The moisture of NR latex and 2wt% that 2.5wt% is added into suspension dissipates vulcanizing agent, and wherein NR latex is flat
Equal particle diameter be 100nm, solid content 60%, and the solid content of the scattered vulcanizing agent of moisture is 5wt%, the sulphur contained, Vulcanization accelerator TMTD,
Zinc oxide, hydroxy cellulose sodium part by weight are 5: 1: 1: 2, and stirring 20min makes NR latex uniformly be scattered in clay aqueous suspension
In solution, NR latex/clay water slurry is obtained；
Step 3：Suspension is transferred to cylinder polystyrene bottle, being placed in liquid-nitrogen freeze drying machine makes it freeze immediately, then exists
The upper drying for the freeze dryer that 25 DEG C of temperature 4 days, pressure 10bar,；Obtain NR latex/clay organic aerogel composite forerunner
Body；
Step 4：Step 3 is obtained into sample, 90 DEG C of heating 1h, prepares NR latex/clay organic aerogel composite.Obtain
NR latex/clay organic aerogel composite performance it is as shown in table 1.
Embodiment 2
The method that embodiment 1 is repeated by each component content specified, but NR latex/clay aqueous suspension described in step 2
NR latex contents are 5wt% in liquid.Obtained NR latex/clay organic aerogel composite performance is as shown in table 1.
Embodiment 3
The method that embodiment 1 is repeated by each component content specified, but NR latex/clay aqueous suspension described in step 2
NR latex contents are 7.5wt% in liquid.Obtained NR latex/clay organic aerogel composite performance is as shown in table 1.
Embodiment 4
The method that embodiment 1 is repeated by each component content specified, but NR latex/clay aqueous suspension described in step 2
NR latex contents are 10wt% in liquid.Obtained NR latex/clay organic aerogel composite performance is as shown in table 1.
Comparative example 1
The method that embodiment 1 is repeated by each component content specified, but glued in the clay water slurry described in step 1
Native content is 5wt%.Obtained NR latex/clay organic aerogel composite performance is as shown in table 1.
Comparative example 2
The method that embodiment 1 is repeated by each component content specified, but it is 5bar that pressure is freezed in step 3.Obtained NR
Latex/clay organic aerogel composite performance is as shown in table 1.
Table 1
The invention provides a kind of low-density, lower thermal conductivity, high porosity, high intensity NR latex/clay organic aerogel
Composite and preparation method thereof.
Claims (5)
- A kind of 1. NR latex/clay organic aerogel composite, it is characterised in that：The material is by containing 2.5wt%- The mixing water slurry progress liquid nitrogen frozen that the moisture of 10wt% NR latex, 10wt% clay and 2wt% dissipates vulcanizing agent is done It is dry, then be prepared by 90 DEG C of heating 1h.
- 2. NR latex/clay organic aerogel composite according to claim 1, it is characterised in that：Described NR glue The average grain diameter of breast is 100nm, solid content 60%, and clay is sodium-based montmorillonite, average grain diameter 12nm.
- 3. NR latex/clay organic aerogel composite according to claim 1, it is characterised in that：Liquid nitrogen frozen is done Dry condition is 25 DEG C, pressure 10bar of temperature, 4 days time.
- 4. NR latex/clay organic aerogel composite according to claim 1, it is characterised in that：Described moisture The solid content for dissipating vulcanizing agent is 5%, is made up of sulphur, Vulcanization accelerator TMTD, zinc oxide and hydroxy cellulose sodium, part by weight 5: 1∶1∶2。
- 5. a kind of preparation method of NR latex/clay organic aerogel composite, it is characterised in that comprise the following steps：Step 1：Clay is weighed, sodium-based montmorillonite clay is scattered in deionized water, it is molten to be uniformly mixing to obtain clay aqueous suspension Liquid；Step 2：NR latex is added into solution and moisture dissipates vulcanizing agent, stirring 20min makes NR latex uniformly be scattered in clay In aqueous suspension solution, NR latex/clay water slurry is obtained；Step 3：Suspension is transferred to cylinder polystyrene bottle, liquid-nitrogen freeze drying machine is placed in and freezes, then in 25 DEG C of temperature Freeze dryer upper drying 4 days, pressure 10bar,；Step 4：Step 3 is obtained into sample, 90 DEG C of heating 1h, obtains NR latex/clay organic aerogel composite.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115181322A (en) * | 2022-07-15 | 2022-10-14 | 武汉工程大学 | Sodium alginate/montmorillonite/natural latex aerogel and preparation method and application thereof |
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| CN1821289A (en) * | 2006-01-18 | 2006-08-23 | 暨南大学 | Method for preparing nano montmorillonite modified natural emulsion medical product |
| CN102153794A (en) * | 2011-02-21 | 2011-08-17 | 华南理工大学 | Method for preparing polymer/clay nano-composite |
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| CN103599734A (en) * | 2013-11-22 | 2014-02-26 | 中国工程物理研究院核物理与化学研究所 | Aerogel material and preparation method thereof |
| CN106947198A (en) * | 2017-04-17 | 2017-07-14 | 中国工程物理研究院核物理与化学研究所 | A kind of aerogel material and preparation method thereof |
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2017
- 2017-09-16 CN CN201710872624.6A patent/CN107746481A/en active Pending
Patent Citations (5)
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| CN1821289A (en) * | 2006-01-18 | 2006-08-23 | 暨南大学 | Method for preparing nano montmorillonite modified natural emulsion medical product |
| CN102153794A (en) * | 2011-02-21 | 2011-08-17 | 华南理工大学 | Method for preparing polymer/clay nano-composite |
| CN103589005A (en) * | 2013-10-17 | 2014-02-19 | 中科纳达控股有限公司 | Preparation method of illite/montmorillonite mixed-layer clay/natural rubber compounded rubber |
| CN103599734A (en) * | 2013-11-22 | 2014-02-26 | 中国工程物理研究院核物理与化学研究所 | Aerogel material and preparation method thereof |
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| TASSAWUTH POJANAVARAPHAN等: "Prevulcanized natural rubber latex/clay aerogel nanocomposites", 《EUROPEAN POLYMER JOURNAL》 * |
| TASSAWUTH POJANAVARAPHAN等: "Solution Cross-Linked Natural Rubber (NR)/Clay Aerogel Composites", 《MACROMOLECULES》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115181322A (en) * | 2022-07-15 | 2022-10-14 | 武汉工程大学 | Sodium alginate/montmorillonite/natural latex aerogel and preparation method and application thereof |
| CN115181322B (en) * | 2022-07-15 | 2023-09-22 | 武汉工程大学 | Sodium alginate/montmorillonite/natural latex aerogel and preparation method and application thereof |
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