CN102584323A - Geopolymeric light porous material and preparation method thereof - Google Patents
Geopolymeric light porous material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a geopolymeric light porous material and a preparation method thereof. By using metakaolin, alumina and water glass as raw materials and using aluminum powder as a foaming agent, the porous material which uses a geopolymeric material as a framework and has good performance is prepared at a low temperature (between 40 and 100 DEG C). Through testing the performance of the porous materials, a result shows that the compressive strength of the porous material is between 1.67 and 10.86 Mpa, the apparent porosity of the porous material is between 35 percent to 80 percent, the volume density of the porous material is between 0.30g/cm3 and 1.24g/cm3, and the porous material can be resistant to a high temperature of 800 DEG C; through controlling the proportioning, the viscosity and reaction conditions of slurry, porous materials with different performance and different pore structures can be obtained. The preparation method has the advantages of simple process and low cost; and the light porous material is hopeful of being applied to the fields of thermal insulation materials, sound absorption materials, waste gas adsorbing materials, inorganic membrane materials, energy absorption materials, and the like.
Description
Technical field
The present invention relates to geology polymer material and preparation field thereof.It specifically is a kind of geopolymer light porous material and preparation method thereof.
Background technology
The geology polymeric materials is mainly alkali and excites geology polymeric gel material.The research of base geology polymeric materials is morning relatively, and the application of this type material can be traced back to ancient times, promptly with kaolin, scud or ls and salt lake composition Na
2CO
3, plant ash composition K
2CO
3And the mixture of silica, add water and mix and stir the back and produce highly basic NaOH or KOH, react with other component, generate the mineral association sticker and process rostone.Geopolymer is as a kind of inorganic polymeric aluminium-silica silicate material, because of its excellent performance has worldwide obtained broad research.Because its special inorganic polycondensation three-dimensional oxide network structure makes geology polymer material aspect numerous, have high-temperature behavior and the mechanical property higher than macromolecular material, cement, pottery and metal.Simultaneously, energy consumption and three wastes discharge amount that geopolymer prepares in the process are all very low, so it is environmentally friendly and can be recycled well, is a kind of " green material " of Sustainable development.
J. Davidovits proposes to this type alkali active material unification and names, and the title of confirming at that time is to gather aluminosilicate (Polysialate, Sialate are the abbreviations of silicon-oxo-aluminate).Should this title be that comparison is proper, embody the elementary composition of this type material clearly; Soon afterwards, he has adopted a more popular title " geopolymer (Geopolymer) " to refer to and gather aluminosilicate again in another piece USP; The professor Della.M.Roy of University of Pennsylvania has delivered the review article of " New strong cement materials:chemically bonded ceramics " by name on " Science " magazine in 1987.Article is contrast with cement, set forth the excellent properties of chemically bonded pottery (alkali activates and gathers aluminosilicate material) in detail, and its application prospect has been carried out optimistic prediction, further improved the enthusiasm that various countries fall over each other to study the geopolymer material.Subsequently, the geopolymer science has welcome its flourish period, and performance is constantly improved, and Application Areas is also constantly widened.At present; Many mechanisms that specialize in are arranged in the world as in the research work of being devoted to ground polymers material, like " Geopolymer Institute " and " the Waterways Experiment Station " of the U.S., Australian " the Geopolymer Alliance " etc. of France.Theory and the growth fast of applied research achievement about ground polymers science.
Domestic research to the artificial mineral polymer materials is started late.The unit that participates in geopolymer research mainly contains units such as Tsing-Hua University, China Mining University, Southeast China University, University of Science & Technology, Beijing, China University of Geosciences, Guangxi University.Mainly contain following achievement in application facet: the horse great writing of China University of Geosciences etc. utilizes potash feldspar tailings (potassium felspar sand 15.5%; Plagioclase 34.0%, quartz 38.0%, blotite 5.0%; Kaolinite 4.8%; Other accessory minerals 2.0%) be main raw material, the preparation geopolymer makes important progress, and the ultimate compression strength of laboratory sample reaches 19.4-24.9 MPa (solidifying 7-28 d).University of Science & Technology, Beijing utilizes Shoudu Iron and Steel Co slag and blast furnace slag to prepare the geology polymer material that main mechanical property meets 42.5 class g cement requirements, and preparation cost has only the former about 1/2.And be expected to develop the geopolymer that main mechanical property reaches 62.5 class g cement requirements.The Wang Feng of Xi'an building university etc. studies early stage mechanical property, extent of hydration, active A l and Si, the basicity etc. of NaOH alkali-activated slag geopolymer; The Jia Yihai of China Mining University etc. are the main source of silane agent with flyash; Prepared geology polymer material, through optimization of process conditions: excite back ageing 24-48h, solid-liquid mixes churning time 10-15min; In 60 1 80 ℃ of scopes after the water-filled boiler protection 24h time; Naturally place, the powder of preparation is worked for grey geology polymer materials ultimate compression strength can reach 27.2MPa, can reach 42.5MPa in 28 days.
Mostly stress the preparation method and the mechanical property of geopolymer in the above-mentioned research, all do not related to preparation method, performance and the application of porous material.Through retrieval, have only applicant of the present invention in patent of invention " a kind of novel clay soil polyporous materials and preparation method thereof (application number: 200910113874.7) " and " a kind of porous material of phosphate-based geopolymer and preparation method thereof (application number: 200910114099.7) ", to relate to the preparation of geopolymer porous material.
The present invention then is on the basis of " a kind of novel clay soil polyporous materials and preparation method thereof " patent, and through adding the aluminium powder whipping agent, the adjustment silica alumina ratio reduces blowing temperature and obtained the porous material that performance is more prone to control; The present invention has compared significantly different with aforementioned invention.The preparation method that the present invention proposes belongs to interpolation pore-forming material technology and prepares porous geology polymer material, particularly blowing temperature at 40-100 ℃, is significantly less than 150 ℃ the blowing temperature that proposes in the patent 200910113874.7.
Summary of the invention
The objective of the invention is to overcome the shortcoming that prior art exists, provide that a kind of cost is low, technology simple, the geopolymer porous material of nontoxic pollution-free, starting material wide material sources and preparation method thereof.
The technical scheme that the present invention solves the problems of the technologies described above is following:
1. geopolymer light porous material; After this material is made into slurry by pressed powder S and liquid phase L according to weight ratio 1:1; With the aluminium powder is whipping agent, and through foaming, maintenance was prepared from 4～8 hours under 40～100oC temperature condition, in the mould of definite shape; Wherein: the solid phase composite is counted by 100 parts of weight parts, 80～100 parts of metakaolins, 0～20 part in aluminum oxide or white lake; Liquid phase component composition is counted by 100 parts of weight parts, and 80～100 parts of water glass, water are 0～20 part; Aluminium powder is 0.05%～0.5% of a solid phase powder weight;
Above-mentioned metakaolin is that the kaolin after above kaolin raw ore powder of 200 orders or the process washing is calcined gained powder more than 2 hours in 600～900oC air; Above-mentioned aluminum oxide or white lake are that fineness is greater than 200 purpose technical grade powders; Above-mentioned aluminium powder is that granularity is greater than 400 purpose technical grade aluminium powders; Above-mentioned water glass is that modulus is 1.0～1.5 industrial sodium silicate or potash water glass;
The ultimate compression strength of above-mentioned porous material between 1.67～10.86Mpa, apparent porosity between 35%～80%, volume density is at 0.30g/cm
3～1.24g/cm
3Between, can anti-800
oThe high temperature of C.
2. the preparation method of a geopolymer light porous material is characterized in that, operation steps is following:
1) press 80～100 parts of metakaolins, 0～20 part in aluminum oxide or white lake stir in powder stirrer, obtain blended solid phase powder;
2) by weight: 80～100 parts of water glass, 0～20 part in water mixes, and obtains the mixing liquid phase;
3) just the blended solid phase powder of step 1) with step 2) mixing liquid mix mutually, obtain slurry;
4) the aluminium powder adding suitable quantity of water with solid phase powder weight 0.05%～0.5% is prepared into aluminium powder solution.The slurry and the aluminium powder solution of step 3) are mixed, inject mould then, maintenance 4～8h in 40oC～100oC thermostat container, acquisition void content are 35～80% hole, polymers Quito, ground material;
5) porous material after the demoulding obtains material requested through cutting processing.
It is simple to the invention provides a kind of technology, nontoxic pollution-free, and cost is low, and starting material spread all over the preparation method of porous material all over the world; This material is expected at lagging material, waste gas sorbing material, inorganic material film, and fields such as energy absorbing material are applied.
Beneficial effect of the present invention: not only technology is simple, nontoxic pollution-free, and cost is low, and starting material spread all over all over the world; And have preparation temperature low (40～100 ℃ of scopes), and the porous material void content of preparation is controlled, and apparent porosity can reach 80vol%, and ultimate compression strength is greater than 1.0MPa, the high temperature that ability is 800 ℃., this material directly prepares the goods of complicated shape because by slurry foaming preparation, can making it in different moulds, foam, and simple.
Embodiment
Below in conjunction with embodiment the present invention is done further description, but need to prove, embodiment does not constitute the restriction that the present invention is required protection domain.
Embodiment 1:
Proportioning raw materials: solid phase S component and umber (by 100 parts of weight) proportioning is following:
Metakaolin: 100 parts;
Aluminum oxide: 0 part;
Aluminium powder: be 0.5% of solid phase powder weight;
The umber of liquid phase L component and water (by 100 parts of weight) proportioning:
Water glass (modulus is 1.2): 90 parts;
Water: 10 parts.
Concrete preparation technology is following:
(1) solid phase S: with fineness is that calcining obtained metakaolin in 2 hours in the kaolin powder process 800oC air more than 200 orders;
(2) liquid phase L: commercial sodium water glass and NaOH are mixed, and the water glass that is adjusted to 1.2 moduluses is for use;
(3) solid phase S and liquid phase L are mixed with 1: 1 weight ratio, obtain slurry after stirring homogenize in 30 minutes;
(4) 0.5% aluminium powder of solid phase powder weight is added suitable quantity of water and be prepared into aluminium powder solution.Slurry and aluminium powder solution are mixed, inject irony property mould then, place 80 ℃ of left and right sides thermostat containers, the constant temperature foaming got final product the demoulding after 6 hours;
(5) the gained porous material is cut into test its mechanical property and pore structure after the shape of rule, its basic index is following: ultimate compression strength is 1.6MPa, and void content is about 80%.
Embodiment 2:
Proportioning raw materials: solid phase S component and umber (by 100 parts of weight) proportioning is following:
Metakaolin: 90 parts;
White lake: 10 parts;
Aluminium powder: be 0.25% of solid phase powder weight;
The umber of liquid phase L component and water (by 100 parts of weight) proportioning:
Water glass (modulus is 1.0): 80 parts;
Water: 20 parts.
Concrete preparation technology is following:
(1) solid phase S: with fineness is that calcining obtained metakaolin in 2 hours in the kaolin raw ore powder process 800oC air more than 200 orders; Mix aluminium powder and an amount of water for use;
(2) liquid phase L: it is for use that modulus is that 1.0 water glass and water mix in proportion the back;
(3) solid phase S and liquid L are mixed with the 1:1 weight ratio, obtain slurry after stirring homogenize in 30 minutes;
(4) 0.25% aluminium powder of solid phase powder weight is added suitable quantity of water and be prepared into aluminium powder solution.Slurry and aluminium powder solution are mixed, inject the irony mould then, place 40 ℃ of left and right sides thermostat containers, the constant temperature foaming got final product the demoulding after 8 hours;
(5) the gained porous material is cut into test its mechanical property and pore structure after the shape of rule, its basic index is following: ultimate compression strength is 3.5MPa, and void content is about 65%.
Embodiment 3:
Proportioning raw materials: solid phase S component and umber (by 100 parts of weight) proportioning is following:
Metakaolin: 100 parts;
White lake: 0 part;
Aluminium powder: be 0.05% of solid phase powder weight;
The umber of liquid phase L component and water (by 100 parts of weight) proportioning:
Water glass (modulus is 1.2): 100 parts;
Water: 0 part.
Concrete preparation technology is following:
(1) solid phase S: with fineness is that calcining obtained metakaolin in 2 hours in the kaolin powder process 800oC air more than 200 orders;
(2) liquid phase L: with modulus is that 1.2 100 parts of water glass are for use;
(3) solid phase S and liquid L are mixed with the 1:1 weight ratio, stir after the homogenize in 30 minutes for use;
(4) 0.05% aluminium powder of solid phase powder weight is added suitable quantity of water and be prepared into aluminium powder solution.Slurry and aluminium powder aqueous solution is even, inject the irony mould then, place 100 ℃ of left and right sides thermostat containers, the constant temperature foaming got final product the demoulding after 4 hours;
(5) the gained porous material is cut into test its mechanical property and pore structure after the shape of rule, its basic index is following: ultimate compression strength is 10.86Mpa, and void content is about 35%.
Embodiment 4:
Proportioning raw materials: solid phase S component and umber (by 100 parts of weight) proportioning is following:
Metakaolin: 80 parts;
Aluminum oxide: 20 parts;
Aluminium powder: be 0.15% of solid phase powder weight;
The umber of liquid phase L component and water (by 100 parts of weight) proportioning:
Water glass (modulus is 1.5): 85 parts:
Water: 15 parts;
Concrete preparation technology is following:
(1) solid phase S: with fineness is that calcining obtained metakaolin in 2 hours in the kaolin powder process 800oC air more than 200 orders;
(2) liquid phase L: it is for use that modulus is that 1.5 water glass and water mix in proportion the back;
(3) solid phase S and liquid phase L are mixed with the 1:1 weight ratio, stir after the homogenize in 30 minutes for use;
(4) 0.15% aluminium powder of solid phase powder weight is added suitable quantity of water and be prepared into aluminium powder solution.Slurry and aluminium powder aqueous solution is even, inject the irony mould then, place 90 ℃ of left and right sides thermostat containers, the constant temperature foaming got final product the demoulding after 8 hours;
(5) the gained porous material is cut into test its mechanical property and pore structure after the shape of rule, its basic index is following: ultimate compression strength is 6.5Mpa, and void content is about 50%.
Claims (4)
1. geopolymer light porous material; It is characterized in that this material is a whipping agent with the aluminium powder after being made into slurry by pressed powder S and liquid phase L according to weight ratio 1:1; Through foaming, maintenance was prepared from 4～8 hours under 40～100oC temperature condition, in the mould of definite shape; Wherein: the solid phase composite is counted by 100 parts of weight parts, 80～100 parts of metakaolins, 0～20 part in aluminum oxide or white lake; Liquid phase component composition is counted by 100 parts of weight parts, and 80～100 parts of water glass, water are 0～20 part; Aluminium powder is 0.05%～0.5% of a solid phase powder weight.
2. require 1 described a kind of geopolymer porous material according to power, it is characterized in that, described metakaolin is that the kaolin after above kaolin raw ore powder of 200 orders or the process washing is calcined gained powder more than 2 hours in 600～900oC air; Described aluminum oxide or white lake are that fineness is greater than 200 purpose technical grade powders; Described aluminium powder is that granularity is greater than 400 purpose technical grade aluminium powders; Said water glass is that modulus is 1.0～1.5 industrial sodium silicate or potash water glass.
3. a kind of geopolymer porous material according to claim 1 is characterized in that, the ultimate compression strength of said porous material between 1.67～10.86Mpa, apparent porosity between 35%～80%, volume density is at 0.30g/cm
3～1.24g/cm
3Between, can anti-800
oThe high temperature of C.
4. a kind of according to claim 1 preparation method of geopolymer light porous material is characterized in that
1) press 80～100 parts of metakaolins, 0～20 part in aluminum oxide or white lake stir in powder stirrer, obtain blended solid phase powder;
2) by weight: 80～100 parts of water glass, 0～20 part in water mixes, and obtains the mixing liquid phase;
3) just the blended solid phase powder of step 1) with step 2) mixing liquid mix mutually, obtain slurry;
4) the aluminium powder adding suitable quantity of water with solid phase powder weight 0.05%～0.5% is prepared into aluminium powder solution; The slurry and the aluminium powder solution of step 3) are mixed, inject mould then, maintenance 4～8h in 40oC～100oC thermostat container, acquisition void content are 35～80% hole, polymers Quito, ground material;
5) porous material after the demoulding obtains material requested through cutting processing.
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| CN102795781A (en) * | 2012-08-20 | 2012-11-28 | 宁波荣山新型材料有限公司 | Low-temperature foam glass thermal insulation material and preparation method thereof |
| CN103435322A (en) * | 2013-08-19 | 2013-12-11 | 南京大学 | Preparation method of high-temperature-resistant ceramic base polymer |
| CN103641324A (en) * | 2013-12-03 | 2014-03-19 | 南京大学 | Method for preparing sintering-free geopolymer foam glass |
| CN103803941A (en) * | 2014-03-10 | 2014-05-21 | 盐城工学院 | Metakaolin inorganic polymer foam material with high strength and preparation method thereof |
| CN105837066A (en) * | 2016-04-08 | 2016-08-10 | 济南大学 | A foamed nickel-iron slag geopolymer and a preparing method thereof |
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| CN112479662A (en) * | 2020-11-23 | 2021-03-12 | 广西交科集团有限公司 | Method and device for controlling shrinkage of alkali-activated slag mortar through low-temperature stirring |
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| CN102795781A (en) * | 2012-08-20 | 2012-11-28 | 宁波荣山新型材料有限公司 | Low-temperature foam glass thermal insulation material and preparation method thereof |
| CN103435322A (en) * | 2013-08-19 | 2013-12-11 | 南京大学 | Preparation method of high-temperature-resistant ceramic base polymer |
| CN103641324A (en) * | 2013-12-03 | 2014-03-19 | 南京大学 | Method for preparing sintering-free geopolymer foam glass |
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| CN105837066B (en) * | 2016-04-08 | 2018-01-02 | 济南大学 | A kind of Foamed Nickel scum geo-polymer and preparation method thereof |
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| CN106467378A (en) * | 2016-09-05 | 2017-03-01 | 广西大学 | A kind of synthetic method of high effective green environmentally friendly filter membrane |
| CN106467378B (en) * | 2016-09-05 | 2019-07-26 | 广西大学 | A kind of synthetic method of high effective green environmentally friendly filter membrane |
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| CN107445584A (en) * | 2017-07-31 | 2017-12-08 | 常州建轩纺织品有限公司 | A kind of preparation method of high intensity, porous water imbibition geo-polymer |
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| CN107999018A (en) * | 2017-12-07 | 2018-05-08 | 沈阳建筑大学 | A kind of preparation method of the pitch organic volatile inhibitor based on solid waste |
| CN108129081A (en) * | 2017-12-26 | 2018-06-08 | 北方民族大学 | A kind of high temperature resistant complex cement sill and preparation method thereof |
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| CN112110512A (en) * | 2020-09-18 | 2020-12-22 | 昆明理工大学 | Application of blast furnace nickel-iron slag geopolymer in methylene blue adsorption |
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Application publication date: 20120718 |