CN108975794B - Clay/sodium alginate composite aerogel flame-retardant material and preparation method thereof - Google Patents
Clay/sodium alginate composite aerogel flame-retardant material and preparation method thereof Download PDFInfo
- Publication number
- CN108975794B CN108975794B CN201811054063.XA CN201811054063A CN108975794B CN 108975794 B CN108975794 B CN 108975794B CN 201811054063 A CN201811054063 A CN 201811054063A CN 108975794 B CN108975794 B CN 108975794B
- Authority
- CN
- China
- Prior art keywords
- clay
- sodium alginate
- retardant
- flame
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/001—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing unburned clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
Abstract
The invention relates to the field of clay deep processing, and discloses a clay/sodium alginate composite aerogel flame retardant material and a preparation method thereof, wherein the flame retardant material comprises the following components in percentage by mass: clay: calcium carbonate: sodium alginate: gluconolactone = 100: 1-5: 5: 1.75. the clay is used as a raw material, sodium alginate is used for improving the mechanical property of the aerogel, an isopropanol-water mixed solvent is used, and the obtained hydrogel is obtained by freezing, isopropanol solvent replacement and normal pressure drying. The composite aerogel has the pore diameter mainly distributed at 5nm, the porosity of 98.8 percent and the apparent density of 0.03-0.06 g-cm‑3The thermal conductivity is 0.020-0.032W/(mk). The heat-insulating flame-retardant material has excellent flame-retardant property, good mechanical property, short process period, low solvent consumption and low production cost, meets the requirements of ecological environment protection, and has good application prospect in the field of flame-retardant and heat-insulating materials of buildings.
Description
Technical Field
The invention relates to the field of clay deep processing, in particular to a clay/sodium alginate composite aerogel flame-retardant heat-insulating material and a preparation process thereof.
Background
Aerogel is taken as a super thermal insulation material which is raised in recent years, and the thermal conductivity coefficient is far lower than that of common thermal insulation foam. The clay/polymer composite aerogel serving as a new third-generation material has great potential in future heat insulation materials due to the excellent properties of inorganic and organic aerogels, such as abundant sources, degradability and biocompatibility.
The research on preparing the flame-retardant and heat-insulating aerogel material by using clay as a raw material is widely concerned by researchers in recent years. Wang et al reported that 20-40wt% furfuryl alcohol was mixed with 10wt% nano inorganic mineral bentonite slurry 1:1 and prepared by freeze-drying to give a density of 0.117-0.179 g/cm3Compounding aerogel materials. The composite aerogels have low flammability and do not burn significantly for more than nearly 20 seconds when subjected to a gas flame (Wang T, Sun H, Long J, et al. ACS Sustainable Chemistry)&Engineering2016, 4 (5), 2601-2605.). Zhao et al reported that a density of 0.118g/cm was prepared by freeze-drying using 5wt% bentonite, 5wt% PVA and 2wt% porcine or fish gelatin3And (3) compounding the aerogel. The Limiting Oxygen Index (LOI) of the obtained aerogel can reach 28.5 percent at most (Wang Y T, ZHao H Bo, Degracia K et al& Interfaces, 2017, 9, 42258-42265）。
Compared with the traditional supercritical drying technology, the current environment-friendly freeze drying technology is the most common drying method for preparing the clay/high-molecular polymer composite aerogel. However, freeze drying still requires relatively low temperature, a certain pressure range and high equipment investment, and the application of the clay/high-molecular polymer composite aerogel in building flame retardation and heat insulation is limited. The normal pressure drying technology adopts conventional normal pressure equipment, has low equipment investment, can run without high pressure condition and a specific reactor, is easy to realize large-scale production, and is particularly suitable for producing aerogel materials special for building heat preservation. However, there is a disadvantage in that the aerogel is liable to collapse due to capillary pressure during the drying process.
In order to prevent aerogel collapse caused by normal pressure drying of wet gel, technical means such as multiple wet gel solvent replacement, surface modification and support body increase are adopted to reduce the phenomenon of aerogel collapse. For example, the chinese invention patent (application No. 201410025590.3) discloses a method for preparing silica aerogel under normal pressure, which comprises subjecting to solvent exchange and surface modification for several times, and drying under normal pressure to obtain aerogel. Li et al (Li Y, Tanna VA, Carter K R, et al. nanocellulose aqueous impregnated by Frozen Tofu. ACS Sustainable chem. Eng. 2017, 5, 6387-6391.) were Inspired by the preparation of Frozen Tofu for food, the mechanical stress of cellulose gel was increased by using freezing technique, the gel was replaced by 2-propanol solvent and finally the whole cellulose aerogel was successfully prepared by the atmospheric drying method.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a clay/sodium alginate composite aerogel flame-retardant heat-insulating material and a preparation method thereof.
The technical scheme is as follows: the invention provides a clay/sodium alginate composite aerogel flame-retardant and heat-insulating material which comprises the following components in percentage by mass: clay: calcium carbonate: sodium alginate: gluconolactone = 100: 1-5: 5: 1.75.
the invention also provides a preparation method of the clay/sodium alginate composite aerogel flame-retardant and heat-insulating material, which comprises the following steps: (1) preparing clay into 2wt% clay slurry by using deionized water, adding a proper amount of calcium carbonate into the clay slurry, pulping and dispersing for 10-30 min, and continuously adding a proper amount of 2wt% sodium alginate solution, pulping and dispersing for 10-30 min to obtain mixed slurry; (2) slowly injecting the mixed slurry obtained in the step (1) into glucolactone at the speed of 3-5 ml/min, standing and aging for 6-12 hours to obtain hydrogel; (3) transferring the hydrogel obtained in the step (2) into an isopropanol-water mixed solvent to be soaked for 3-4 hours to obtain alcohol gel; (4) freezing the alcogel obtained in the step (3) to obtain clay/sodium alginate composite cryogel; (5) putting the clay/sodium alginate composite gel obtained in the step (4) into isopropanol for thawing, and then replacing for 6-12 hours with the isopropanol to obtain a modified gel; (6) and (5) putting the modified gel obtained in the step (5) into an atmospheric drying oven to carry out atmospheric drying for 10-12 h at 50-70 ℃ to obtain the clay/sodium alginate flame-retardant heat-insulating aerogel.
Preferably, in the step (1), the calcium carbonate is added in an amount of 1wt% to 5wt% of the mass of the clay.
Preferably, in the step (1), the sodium alginate is added in an amount of 5wt% of the mass of the clay.
Preferably, in the step (2), the mass ratio of the sodium alginate to the gluconolactone is 2: 0.7.
Preferably, in the step (3), the concentration of the isopropanol-water mixed solvent is 15% to 25%.
Preferably, in the step (4), the temperature of the freezing treatment is-80 ℃ to-196 ℃, and the treatment time is 5min to 15 min.
Preferably, in the step (5), the addition amount of the isopropanol is 10-15 ml more than the volume of the clay/sodium alginate composite cryogel.
Preferably, the clay is a fibrous or lamellar clay which is sufficiently dissociated, preferably bentonite, attapulgite, sepiolite or saponite.
Has the advantages that: the invention uses clay which is widely existed in the nature and has higher flame retardance as a raw material, adopts sodium alginate to improve the mechanical property of the aerogel, adopts an isopropanol-water mixed solvent, and obtains the aerogel with ultralow density (the range is 0.025 g/cm) by freezing, isopropanol solvent replacement and normal pressure drying3~0.058g/cm3) The flame-retardant heat-insulating material has good mechanical property, low thermal conductivity (the range is 0.020-0.032W/(mk)), excellent flame-retardant property (the flame-retardant heat-insulating material can bear gas flame and can not burn for more than 300 seconds), and good application prospect in the fields of flame-retardant heat-insulating materials of buildings and the like.
The invention has the advantages that:
1. the natural polymer sodium alginate constructs a framework structure of the aerogel, the clay and the sodium alginate both have good hydrophilicity and good compatibility, and the combination of the clay and the sodium alginate endows the aerogel with good mechanical properties and rich ideal pore structures;
2. the natural mineral clay has good flame retardance and provides a material basis for preparing flame-retardant and heat-insulating materials.
3. The clay-based flame-retardant heat-insulating aerogel prepared by the normal-pressure drying technology provided by the invention has the advantages of short preparation period (2 days), low solvent consumption and low production cost, and has good application prospect in the field of flame-retardant heat-insulating materials of buildings.
Drawings
FIG. 1 is a photograph of a comparative experiment of flammability of EPS foamed polystyrene board and attapulgite/sodium alginate composite aerogel flame-retardant and heat-insulating material.
FIG. 2 is a SEM microstructure diagram before and after combustion of the attapulgite/sodium alginate composite aerogel flame-retardant heat-insulating material.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Embodiment 1:
the embodiment provides an attapulgite/sodium alginate composite aerogel flame-retardant heat-insulating material which comprises the following components in percentage by mass: attapulgite clay: calcium carbonate: sodium alginate: gluconolactone = 100: 1: 5: 1.75.
the preparation method of the attapulgite/sodium alginate composite aerogel flame-retardant heat-insulating material comprises the following steps: (1) pulverizing attapulgite to 200 mesh, adding deionized water to obtain 2wt% slurry, pulping at 10000rpm for 30min, and centrifuging to remove non-attapulgite impurities. Reconfiguring the attapulgite from which impurities are removed into 2wt% of attapulgite slurry, adding 1wt% of light calcium carbonate based on the mass of the attapulgite, fully pulping and dispersing for 15min at 10000rpm, adding 2wt% of sodium alginate solution, and continuously pulping and dispersing for 30min at 10000rpm to obtain mixed slurry; wherein the addition amount of the sodium alginate is 5wt% of the mass of the attapulgite. (2) Slowly injecting the mixed slurry into the gluconolactone at the speed of 4ml/min for gelling for 12h to obtain hydrogel; wherein the mass ratio of the sodium alginate to the gluconolactone is 2: 0.7. (3) Placing the hydrogel in a 20% isopropanol-water mixed solvent, and shaking on a shaking table for 3h to obtain an alcohol gel; the temperature of the shaker was controlled at 40 ℃ and the speed was 120 rpm/min. (4) Freezing the alcogel at-196 deg.C for 10min to obtain attapulgite/sodium alginate composite cryogel (b)5) And (3) soaking the attapulgite/sodium alginate composite gel in isopropanol to thaw for 6h to obtain the modified gel. (6) Drying the modified gel in a drying oven at 60 ℃ under normal pressure for 10h to obtain the attapulgite/sodium alginate composite aerogel flame-retardant heat-insulating material; the density of the heat insulation material is 0.035g/cm3Thermal conductivity of 0.023 W.m-1·K-1And the flame is not obvious, and the burning time is more than 300 seconds.
FIG. 1 is a photograph of a comparative experiment of flammability of EPS foamed polystyrene board and attapulgite/sodium alginate composite aerogel flame-retardant and heat-insulating material. It can be seen from FIG. 1 that the EPS foam polystyrene board is ignited instantly and burns out within 6 seconds. The composite aerogel adopted can not be ignited by open fire, only has partial carbonization phenomenon, and has no obvious smoke.
FIG. 2 is a SEM microstructure diagram before and after combustion of the attapulgite/sodium alginate composite aerogel flame-retardant heat-insulating material. As can be seen from FIG. 2, before and after the composite aerogel is combusted in the small fire experiment, the gaps among the particles become larger, but the internal structure does not change obviously. This demonstrates that the interaction between the attapulgite/sodium alginate system forms a structure that prevents the transfer of heat and flammable volatiles.
Embodiment 2:
the embodiment provides a sepiolite/sodium alginate composite aerogel flame-retardant heat-insulating material which comprises the following components in percentage by mass: sepiolite: calcium carbonate: sodium alginate: gluconolactone = 100: 1: 5: 1.75.
the preparation method of the sepiolite/sodium alginate composite aerogel flame-retardant heat-insulating material comprises the following steps: (1) pulverizing sepiolite to 200 mesh, adding deionized water to obtain 2wt% slurry, pulping at 10000rpm for 30min, and centrifuging to remove non-sepiolite impurity. Reconfiguring the sepiolite with impurities removed into 2wt% of sepiolite slurry, adding light calcium carbonate with the mass of 3wt% of sepiolite, fully pulping and dispersing for 10min at 10000rpm, adding 2wt% of sodium alginate solution, and continuously pulping and dispersing for 30min at 10000rpm to obtain mixed slurry; wherein the adding amount of the sodium alginate is 15wt% of the sepiolite. (2) Slowly injecting the mixed slurry into the gluconolactone at the speed of 5ml/min for gelling for 10h to obtain hydrogel; wherein the seaweed isThe mass ratio of the sodium to the gluconolactone is 2: 0.7. (3) Placing the hydrogel in a 15% isopropanol-water mixed solvent, and shaking on a shaking table for 2h to obtain an alcohol gel; the temperature of the shaker was controlled at 40 ℃ and the speed was 120 rpm/min. (4) Freezing the alcogel at-80 ℃ for 15min to obtain sepiolite/sodium alginate composite cryogel, and (5) soaking the sepiolite/sodium alginate composite cryogel in isopropanol to thaw for 8h to obtain the modified gel. (6) Drying the modified gel in a drying oven at 65 ℃ under normal pressure for 11h to obtain the sepiolite/sodium alginate composite aerogel flame-retardant heat-insulating material; the density of the heat insulating material is 0.060g/cm3Thermal conductivity of 0.029 W.m-1·K-1And the flame is not obvious, and the burning time is more than 300 seconds.
Embodiment 3:
the embodiment provides an attapulgite/sodium alginate composite aerogel flame-retardant heat-insulating material which comprises the following components in percentage by mass: attapulgite clay: calcium carbonate: sodium alginate: gluconolactone = 100: 1: 5: 1.75.
the preparation method of the attapulgite/sodium alginate composite aerogel flame-retardant heat-insulating material comprises the following steps: (1) pulverizing attapulgite to 200 mesh, adding deionized water to obtain 2wt% slurry, pulping at 10000rpm for 25min, and centrifuging to remove non-attapulgite impurities. Reconfiguring the attapulgite from which impurities are removed into 2wt% of attapulgite slurry, adding light calcium carbonate with the mass of 5wt% of the attapulgite, fully pulping and dispersing for 15min at 10000rpm, adding 2wt% of sodium alginate solution, and continuously pulping and dispersing for 30min at 10000rpm to obtain mixed slurry; wherein the addition amount of the sodium alginate is 3wt% of the mass of the attapulgite. (2) Slowly injecting the mixed slurry into the gluconolactone at the speed of 4ml/min for gelling for 8h to obtain hydrogel; wherein the mass ratio of the sodium alginate to the gluconolactone is 2: 0.7. (3) Placing the hydrogel in a 15% isopropanol-water mixed solvent, and shaking on a shaking table for 3h to obtain an alcohol gel; the temperature of the shaker was controlled at 40 ℃ and the speed was 120 rpm/min. (4) Freezing the alcogel at-196 ℃ for 6min to obtain attapulgite/sodium alginate composite cryogel, and (5) soaking the attapulgite/sodium alginate composite cryogel in isopropanol to thaw for 8h to obtain the modified gel. (6) The modified gel is put into a drying oven to be dried for 12 hours under the normal pressure at the temperature of 70 ℃, and the attapulgite/sodium alginate composite aerogel flame retardant is obtainedA thermal insulation material; the density of the heat insulating material is 0.025g/cm3Thermal conductivity of 0.020 W.m-1·K-1And the flame is not obvious, and the burning time is more than 300 seconds.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (9)
1. The preparation method of the clay/sodium alginate composite aerogel flame-retardant heat-insulating material is characterized by comprising the following components in percentage by mass: clay: calcium carbonate: sodium alginate: gluconolactone = 100: 1-5: 5: 1.75, the preparation method comprises the following steps:
(1) preparing clay into 2wt% clay slurry by using deionized water, adding a proper amount of calcium carbonate into the clay slurry, pulping and dispersing for 10-30 min, and continuously adding a proper amount of 2wt% sodium alginate solution, pulping and dispersing for 10-30 min to obtain mixed slurry;
(2) slowly injecting the mixed slurry obtained in the step (1) into glucolactone at the speed of 3-5 ml/min, standing and aging for 6-12 hours to obtain hydrogel;
(3) transferring the hydrogel obtained in the step (2) into an isopropanol-water mixed solvent to be soaked for 3-4 hours to obtain alcohol gel;
(4) freezing the alcogel obtained in the step (3) to obtain clay/sodium alginate composite cryogel;
(5) putting the clay/sodium alginate composite gel obtained in the step (4) into isopropanol for thawing, and then replacing for 6-12 hours with the isopropanol to obtain a modified gel;
(6) and (3) putting the modified gel obtained in the step (5) into an atmospheric drying oven to carry out atmospheric drying for 10-12 h at 50-70 ℃ to obtain the clay/sodium alginate composite aerogel flame-retardant heat-insulation aerogel.
2. The preparation method of the clay/sodium alginate composite aerogel flame-retardant and heat-insulating material as claimed in claim 1, wherein in the step (1), the addition amount of the calcium carbonate is 1wt% -5 wt% of the mass of the clay.
3. The preparation method of the clay/sodium alginate composite aerogel flame-retardant and heat-insulating material as claimed in claim 1, wherein in the step (1), the addition amount of the sodium alginate is 5wt% of the mass of the clay.
4. The preparation method of the clay/sodium alginate composite aerogel flame-retardant and heat-insulating material as claimed in claim 1, wherein in the step (2), the mass ratio of sodium alginate to gluconolactone is 2: 0.7.
5. The preparation method of the clay/sodium alginate composite aerogel flame-retardant and heat-insulating material as claimed in claim 1, wherein in the step (3), the concentration of the isopropanol-water mixed solvent is 15% -25%.
6. The preparation method of the clay/sodium alginate composite aerogel flame-retardant and heat-insulating material as claimed in claim 1, wherein in the step (4), the temperature of the freezing treatment is-80 ℃ to-196 ℃, and the treatment time is 5min to 15 min.
7. The preparation method of the clay/sodium alginate composite aerogel flame-retardant and heat-insulating material as claimed in claim 1, wherein in the step (5), the addition amount of the isopropanol is 10-15 ml more than the volume of the clay/sodium alginate composite aerogel.
8. The preparation method of the clay/sodium alginate composite aerogel flame-retardant and heat-insulating material as claimed in any one of claims 1 to 7, wherein the clay is a fibrous or lamellar clay which is fully dissociated.
9. The preparation method of the clay/sodium alginate composite aerogel flame-retardant and heat-insulating material as claimed in claim 8, wherein the clay is bentonite, attapulgite, sepiolite or soapstone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054063.XA CN108975794B (en) | 2018-09-11 | 2018-09-11 | Clay/sodium alginate composite aerogel flame-retardant material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811054063.XA CN108975794B (en) | 2018-09-11 | 2018-09-11 | Clay/sodium alginate composite aerogel flame-retardant material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108975794A CN108975794A (en) | 2018-12-11 |
| CN108975794B true CN108975794B (en) | 2021-05-25 |
Family
ID=64545954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811054063.XA Active CN108975794B (en) | 2018-09-11 | 2018-09-11 | Clay/sodium alginate composite aerogel flame-retardant material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108975794B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111807800B (en) * | 2020-06-28 | 2022-04-19 | 北新集团建材股份有限公司 | Paper-surface gypsum board and preparation method thereof |
| CN113150363B (en) * | 2021-02-06 | 2022-05-20 | 苏州大学 | Porous aerogel and preparation method thereof |
| CN113292761B (en) * | 2021-05-27 | 2022-09-30 | 淮阴工学院 | Preparation method of heat-insulating flame-retardant composite aerogel foam |
| CN114292446B (en) * | 2021-12-27 | 2022-11-11 | 重庆大学 | Glucomannan composite flame-retardant aerogel and preparation method thereof |
| CN115651274B (en) * | 2022-10-31 | 2024-03-26 | 淮阴工学院 | Preparation method of clay-based composite hydrogel for solar seawater desalination |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105727889A (en) * | 2016-02-25 | 2016-07-06 | 淮阴工学院 | Method for preparing sodium alginate composite microspheres |
| CN106622156A (en) * | 2016-12-07 | 2017-05-10 | 天津市金鳞水处理科技有限公司 | Preparation method of composite hydrogel for adsorbing and detecting heavy metal ions |
| CN106732214A (en) * | 2016-12-28 | 2017-05-31 | 淮阴工学院 | A kind of hydrophobicity natural polymer/attapulgite composite aerogel and preparation method thereof |
| CN107365427A (en) * | 2017-03-21 | 2017-11-21 | 李阳阳 | A kind of method that Frozen-thawed cycled method prepares aeroge |
-
2018
- 2018-09-11 CN CN201811054063.XA patent/CN108975794B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105727889A (en) * | 2016-02-25 | 2016-07-06 | 淮阴工学院 | Method for preparing sodium alginate composite microspheres |
| CN106622156A (en) * | 2016-12-07 | 2017-05-10 | 天津市金鳞水处理科技有限公司 | Preparation method of composite hydrogel for adsorbing and detecting heavy metal ions |
| CN106732214A (en) * | 2016-12-28 | 2017-05-31 | 淮阴工学院 | A kind of hydrophobicity natural polymer/attapulgite composite aerogel and preparation method thereof |
| CN107365427A (en) * | 2017-03-21 | 2017-11-21 | 李阳阳 | A kind of method that Frozen-thawed cycled method prepares aeroge |
Non-Patent Citations (2)
| Title |
|---|
| Hong-Bing Chen等.Low flammability, foam-like materials based on ammonium alginate and sodium montmorillonite clay.《Polymer》.2012, * |
| Low flammability, foam-like materials based on ammonium alginate and sodium montmorillonite clay;Hong-Bing Chen等;《Polymer》;20121023;2.1Materials, 2.2Aerogel preparation，第5827页第2段 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108975794A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108975794B (en) | Clay/sodium alginate composite aerogel flame-retardant material and preparation method thereof | |
| CN102964625B (en) | Method for preparing hydrophobic block cellulose aerogel thermal insulation material | |
| CN104211367B (en) | Building thermal-insulation board and preparation method thereof | |
| CN103878847B (en) | A kind of difficult firebrand material and its preparation method and application | |
| CN109777138B (en) | Method for preparing fireproof flame-retardant, ultra-light and high-strength paper pulp foam by adopting wood fiber raw material | |
| CN108264372B (en) | High-strength low-heat-conductivity A-grade non-combustible aerogel foam and preparation and application thereof | |
| CN112662015B (en) | Flame-retardant nano-cellulose composite aerogel with oriented structure and preparation method thereof | |
| CN108329046B (en) | Preparation method of carbon aerogel heat insulation composite material | |
| CN106750550B (en) | A kind of fire retardant elastic nano-cellulose aerogel and preparation method thereof | |
| CN114835942B (en) | High-strength sodium alginate/lignin flame-retardant aerogel and preparation method and application thereof | |
| Zhao et al. | Superelastic, lightweight, and flame-retardant 3D fibrous sponge fabricated by one-step electrospinning for heat retention | |
| CN113292761B (en) | Preparation method of heat-insulating flame-retardant composite aerogel foam | |
| CN113234256A (en) | Preparation method of double-crosslinking flame-retardant composite aerogel | |
| CN114605696B (en) | Preparation method of silica/aramid nanofiber multifunctional composite heat-insulation aerogel | |
| CN113061287B (en) | Preparation method of flame-retardant wood-based composite aerogel | |
| CN113043405A (en) | Wood-based heat-insulating flame-retardant material and preparation method thereof | |
| CN103790248A (en) | Method for preparing building thermal insulation heat-resisting board | |
| CN115975251B (en) | Preparation method of heat-preservation and heat-insulation cellulose aerogel composite material | |
| CN113198397B (en) | Preparation method of fiber-type clay reinforced metal oxide block aerogel and application of fiber-type clay reinforced metal oxide block aerogel in preparation of hydrophobic heat-insulating flame-retardant material | |
| Zhang et al. | Flame retardant cellulose/polyvinyl alcohol/sodium alginate composite aerogels crosslinked by metal ions for flame resistance materials | |
| CN109867815B (en) | Method for preparing ultra-light high-elasticity, fireproof and waterproof paper pulp foam by adopting wood fiber raw material | |
| CN115557494A (en) | Conductive cellulose nano-alkene and preparation method and application thereof | |
| CN115260598A (en) | High-strength aerogel for heat insulation material and preparation method thereof | |
| CN108285631A (en) | Weather-resistance flame-retardant thermal insulation material and preparation method thereof is stablized in the light environmental protection of one kind | |
| CN110183779B (en) | Application of carboxymethyl cellulose cerium as flame retardant in high molecular polymer material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |