CN105350084A - Surface modification method for calcium sulfate whiskers - Google Patents
Surface modification method for calcium sulfate whiskers Download PDFInfo
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- CN105350084A CN105350084A CN201510765193.4A CN201510765193A CN105350084A CN 105350084 A CN105350084 A CN 105350084A CN 201510765193 A CN201510765193 A CN 201510765193A CN 105350084 A CN105350084 A CN 105350084A
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- Prior art keywords
- calcium sulfate
- crystal whiskers
- solution
- whisker
- anhydrous calcium
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
- C30B29/62—Whiskers or needles
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
- C30B29/22—Complex oxides
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B33/00—After-treatment of single crystals or homogeneous polycrystalline material with defined structure
Abstract
The invention discloses a surface modification method for calcium sulfate whiskers. The surface modification method comprises steps: anhydrous calcium sulfate whiskers are prepared; a surface modifier solution is prepared; the calcium sulfate whiskers are added slowly into the surface modifier solution with stirring, slow stirring is carried out, and a reaction is carried out; the modified anhydrous calcium sulfate whiskers are subjected to impurity removal processing. The method is simple, the steps are few, raw materials are saved, water processing burden is reduced, the anhydrous calcium sulfate whisker product has good performance, and tensile strength, the tear resistance, the folding strength and the pop strength are high. The solution synthesis method is employed, a calcium-containing industrial tail liquid is reacted with sulfuric acid, calcium sulfate whiskers are prepared, the cleaning utilization problem of calcium ions in the waste liquid is solved, which facilitates to achieve cyclic utilization of raw materials and resources are saved. The yield of the prepared calcium sulfate whiskers is high, the crystal form is structured and the length-to-diameter ratio is high.
Description
Technical field
The application belongs to applied chemistry field, is specifically related to a kind of calcium sulfate crystal whiskers surface modifying method.
Background technology
Calcium sulfate crystal whiskers, (CalciumSulfateWhisker is abbreviated as CSW) is crystal whisker of gypsum again, is the fibrous single crystal of calcium sulfate, have anhydrous, Ban Shui and two water point.Calcium sulfate crystal whiskers integrates the advantage of inorganic materials and fortifying fibre, has physical strength high, and modulus is high, dielectric strength is high, abrasion performance, high temperature resistant, corrosion-resistant, without the physicochemical property that fatigue effect etc. is excellent, it can be used as the strongthener of paper to have good development prospect.In addition, calcium sulfate crystal whiskers has the unrivaled cost performance of other whiskers, and its promoting the use of in paper industry will bring considerable economic benefit.But because whisker is different from property of fiber surface and form, there is greatest differences in the aspects such as such as surface polarity, surface chemistry composition, surface energy, cause two-way interaction's power weak, interface binding power is poor, along with the increase of filler load, the bonding force of itself and fiber can be reduced, thus cause the intensity of paper, bulk and the reduction of deflection and the hair and powder dropping of the wearing and tearing of paper machine and paper.Major part filler runs off with machine water, not only wastes raw material and also pollutes water quality, certainly will increase the cost of water treatment.The surface modification of calcium sulfate crystal whiskers is then improve filler retention, improves and adds the effective way of filling out paper strength property.
For the improvement calcium sulfate occurred at present add fill out paper strength property all kinds of technology for, wet-process modified equipment is simple, easy to operate, the whisker look white matter after modification is light, the pliable and tough paper strength that makes of good dispersity, wood property is necessarily strengthened, and improves sheet gloss.Containing Ca
2+trade effluent in, instillation excess sulfuric acid can produce two crystals must, hyperthermia drying makes it slough crystal water, and the calcium sulfate crystal whiskers obtained after utilizing improved chemical to carry out surface modification treatment is for papermaking, and retention can bring up to more than 95%.This approach is Appropriate application trade effluent not only, achieves the recycle of raw material, reduces the burden of water treatment, and paper tensile strength, tear strength, folding endurance, pop strength can be made all to be improved.
Summary of the invention
In view of this, technical problems to be solved in this application are that the retention of calcium sulfate crystal whiskers in paper-making process is low, and the tensile strength of paper, tear strength, folding endurance, pop strength are low, and wastage of material is large, the cost of water treatment is high, provides a kind of surface modifying method of calcium sulfate crystal whiskers.
In order to solve the problems of the technologies described above, this application discloses a kind of surface modifying method of calcium sulfate crystal whiskers, comprising the following steps:
Prepare anhydrous calcium sulfate whisker;
Prepare surface modifier solution;
Described anhydrous calcium sulfate whisker is slowly added described surface modifier solution while stirring, slowly stirs, reaction, carries out the surface modification of anhydrous calcium sulfate whisker;
By the anhydrous calcium sulfate whisker reacting liquid filtering after surface modification, wash filter cake with water, wash away unreacted properties-correcting agent, by the filtration cakes torrefaction after washing, pulverize.
Further, described anhydrous calcium sulfate whisker step of preparing is: to containing Ca
2+trade effluent in add crystalline form growth substance, heated solution, dropwise drip H
2sO
4solution is to Ca
2+precipitate completely, by filtering after described precipitation precipitation, washing, dry to obtain anhydrous calcium sulfate whisker.
Further, described crystalline form growth substance is MgCl
26H
2o, described solution Heating temperature is more than 40 DEG C, described H
2sO
4strength of solution is 10%-40%, and the described precipitation time is 2-8h, and described bake out temperature is 200-450 DEG C.
Further, the described solution step preparing surface-modifying agent is: mixed by Inorganic surface modifiers, be dissolved in water, adjust ph, forms stabilizing solution.
Further, described pH value is 8-10, and described Inorganic surface modifiers liquid quality fraction is 0.01%-5%, and described Inorganic surface modifiers quality is the 1%-30% of described anhydrous calcium sulfate whisker quality.
Preferably, described Inorganic surface modifiers quality is 3% of described anhydrous calcium sulfate whisker quality.
Further, described Inorganic surface modifiers comprises Sodium hexametaphosphate 99, tripoly phosphate sodium STPP and zinc sulfate, by quality ratio Sodium hexametaphosphate 99: tripoly phosphate sodium STPP: zinc sulfate=0.7-1.2:0.7-1.2:0.5-1.0.
Further, in described anhydrous calcium sulfate whisker surface modification step, modified-reaction temperature is 10 DEG C-80 DEG C, and the described reaction times is 0.5-2 hour.
Preferably, modified-reaction temperature is 70 DEG C.
Compared with prior art, the application can obtain and comprise following technique effect:
1) step of modification is simplified: traditional modified technique multiselect gets organic acid or coupling agent as properties-correcting agent, this type of properties-correcting agent is combined instability with whisker, water insoluble, modification and later stage sepn process complexity, high to equipment requirements, be difficult to obtain the calcium sulfate crystal whiskers that purity is higher, adopt inorganic phosphate and zinc sulfate as Ca
2+the sequestrant of ligand, by the wet-process modified calcium sulfate crystal whiskers that can obtain high retention rate, and only through washing to obtain pure whisker.
2) reduce wastage of material: before modified with machine water run off calcium sulfate crystal whiskers up to 40%-60%, after modification, whisker retention, can corresponding minimizing whisker consumption up to more than 95%.
3) paper performance is strengthened: modified whisker whiteness significantly improves, and can improve Paper White Degree.The character of the fortifying fibre itself had can improve paper tensile strength, tear strength, folding endurance, pop strength etc. greatly.
4) alleviate the burden of water treatment: the ion that the calcium sulfate crystal whiskers run off with plain boiled water ionizes out, to equipment, there is corrosive nature, Ca
2+also can increase water hardness, affect product property, modified whisker Ca
2+complexing is complete, the Ca ionized out
2+amount reduces, and alleviates the burden of water treatment.
Certainly, the arbitrary product implementing the application must not necessarily need to reach above-described all technique effects simultaneously.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present application, and form a application's part, the schematic description and description of the application, for explaining the application, does not form the improper restriction to the application.In the accompanying drawings:
Fig. 1 is that anhydrous calcium sulfate whisker prepared by the embodiment of the present application 2 amplifies 50 times of figure.
Embodiment
Drawings and Examples will be coordinated below to describe the embodiment of the application in detail, by this to the application how utilisation technology means solve technical problem and the implementation procedure reaching technology effect can fully understand and implement according to this.
Embodiment 1
The surface modifying method of the calcium sulfate crystal whiskers of the application, comprises the following steps:
Prepare anhydrous calcium sulfate whisker: take Ca (NO
3)
24H
2o11.8g is dissolved in 500ml tap water, and configuration 0.1mol/L ca nitrate soln, adds crystalline form growth substance MgCl
26H
2o, calcium magnesium mol ratio 13:1.The soluble impurity of elimination, stand-by, this is solution A.Heating in water bath, makes solution A maintain more than 40 DEG C, and dropwise drip concentration 10% H
2sO
4solution is to Ca
2+precipitate completely, precipitation 8h, filter, wash, and dry to obtain anhydrous calcium sulfate whisker at 450 DEG C.
Prepare surface modifier solution: take Sodium hexametaphosphate 99, each 0.735g of tripoly phosphate sodium STPP, zinc sulfate 0.525g, mixes.Be dissolved in 40mL tap water, add standard NaOH solution and adjust pH to be 8, form stabilizing solution.
Anhydrous calcium sulfate whisker modification: get 5g anhydrous calcium sulfate whisker, slowly add surface modifier solution under agitation condition, maintains temperature of reaction 80 DEG C, continues stirring reaction 1h.
Anhydrous calcium sulfate whisker removal of impurities aftertreatment by modified: filtered by reaction slurry, and wash filter cake with water, wash away unreacted properties-correcting agent, dry, pulverizing, obtains the calcium sulfate crystal whiskers of the finished product surface modification.
Embodiment 2
The surface modifying method of the calcium sulfate crystal whiskers of the application, comprises the following steps:
Prepare anhydrous calcium sulfate whisker: take Ca (NO
3)
24H
2o35.4g is dissolved in 500ml tap water, and configuration 0.3mol/L ca nitrate soln, adds crystalline form growth substance MgCl
26H
2o, calcium magnesium mol ratio 13:1.The soluble impurity of elimination, stand-by, this is solution A.Heating in water bath, makes solution A maintain 50 DEG C, and dropwise drip concentration 20% H
2sO
4solution is to Ca
2+precipitate completely, precipitation 6h, filter, wash, and dry to obtain anhydrous calcium sulfate whisker at 400 DEG C.
Prepare surface modifier solution: take Sodium hexametaphosphate 99, tripoly phosphate sodium STPP, each 0.12g of zinc sulfate, mix.Be dissolved in 100mL tap water, add standard NaOH solution and adjust pH to be 9, form stabilizing solution.
Anhydrous calcium sulfate whisker modification: get 5g anhydrous calcium sulfate whisker, slowly add surface modifier solution under agitation condition, maintains temperature of reaction 70 DEG C, continues stirring reaction 30min.
Anhydrous calcium sulfate whisker removal of impurities aftertreatment by modified: filtered by reaction slurry, and wash filter cake with water, wash away unreacted properties-correcting agent, dry, pulverizing, obtains the calcium sulfate crystal whiskers of the finished product surface modification.
Embodiment 3
The surface modifying method of the calcium sulfate crystal whiskers of the application, comprises the following steps:
Prepare anhydrous calcium sulfate whisker: take Ca (NO
3)
24H
2o47.2g is dissolved in 500ml tap water, and configuration 0.4mol/L ca nitrate soln, adds crystalline form growth substance MgCl
26H
2o, calcium magnesium mol ratio 13:1.The soluble impurity of elimination, stand-by, this is solution A.Heating in water bath, makes solution A maintain 60 DEG C, and dropwise drip concentration 30% H
2sO
4solution is to Ca
2+precipitate completely, precipitation 2h, filter, wash, and dry to obtain anhydrous calcium sulfate whisker at 200 DEG C.
Prepare surface modifier solution: take Sodium hexametaphosphate 99 0.30g, tripoly phosphate sodium STPP 0.27g, zinc sulfate 0.27g, mixes.Be dissolved in 270mL tap water, add standard NaOH solution and adjust pH to be 10, form stabilizing solution.
Anhydrous calcium sulfate whisker modification: get 5g anhydrous calcium sulfate whisker, slowly add surface modifier solution under agitation condition, maintains temperature of reaction 50 DEG C, continues stirring reaction 2h.
Anhydrous calcium sulfate whisker removal of impurities aftertreatment by modified: filtered by reaction slurry, and wash filter cake with water, wash away unreacted properties-correcting agent, dry, pulverizing, obtains the calcium sulfate crystal whiskers of the finished product surface modification.
Embodiment 4
The surface modifying method of the calcium sulfate crystal whiskers of the application, comprises the following steps:
Prepare anhydrous calcium sulfate whisker: take Ca (NO
3)
24H
2o59.0g is dissolved in 500ml tap water, and configuration 0.5mol/L ca nitrate soln, adds crystalline form growth substance MgCl
26H
2o, calcium magnesium mol ratio 13:1.The soluble impurity of elimination, stand-by, this is solution A.Heating in water bath, makes solution A maintain 60 DEG C, and dropwise drip concentration 40% H
2sO
4solution is to Ca
2+precipitate completely, precipitation 4h, filter, wash, and dry to obtain anhydrous calcium sulfate whisker at 300 DEG C.
Prepare surface modifier solution: take Sodium hexametaphosphate 99, each 0.12g of tripoly phosphate sodium STPP, zinc sulfate 0.10g, mixes.Be dissolved in 3400mL tap water, add standard NaOH solution and adjust pH to be 10, form stabilizing solution.
Anhydrous calcium sulfate whisker modification: get 5g anhydrous calcium sulfate whisker, slowly add surface modifier solution under agitation condition, maintains temperature of reaction 10 DEG C, continues stirring reaction 2h.
Anhydrous calcium sulfate whisker removal of impurities aftertreatment by modified: filtered by reaction slurry, and wash filter cake with water, wash away unreacted properties-correcting agent, dry, pulverizing, obtains the calcium sulfate crystal whiskers of the finished product surface modification.
The surface modifying method of the calcium sulfate crystal whiskers of the application, method is simple, and step is few, conservation, alleviates water treatment burden simultaneously, anhydrous calcium sulfate whisker good product performance, and tensile strength, tear strength, folding endurance, pop strength are high.The application's raw material used is for containing Ca
2+industrial effluent, be not suitable for adopting hydrothermal method or normal pressure acidization, if be directly discharged in environment, not only polluted water also can cause the waste of raw material, is a great problem of industrial production and environment protection.Adopt the application's solution synthetic method by calcic industry tail washings and sulfuric acid reaction, obtained calcium sulfate crystal whiskers, solves the clean utilization problem of calcium ion in waste liquid, is beneficial to the recycle realizing raw material, economizes on resources.As shown in Figure 1, calcium sulfate crystal whiskers productive rate prepared by the embodiment of the present application 2 is large, and regular crystal forms, length-to-diameter ratio is high.
The modification of calcium sulfate crystal whiskers determines the use properties of whisker, and therefore, the modification of whisker also just seems particularly important.So various whisker modified dose when careful in selecting, the every code also in strict implement enhancing modified is produced, to produce the calcium sulfate crystal whiskers of high-quality.
The surface modifying method of the calcium sulfate crystal whiskers of the application has the following advantages:
(1) step of modification is simplified: traditional modified technique multiselect gets organic acid or coupling agent as properties-correcting agent, this type of properties-correcting agent is combined instability with whisker, water insoluble, modification and later stage sepn process complexity, high to equipment requirements, be difficult to obtain the calcium sulfate crystal whiskers that purity is higher, adopt inorganic phosphate and zinc sulfate as Ca
2+the sequestrant of ligand, by the wet-process modified calcium sulfate crystal whiskers that can obtain high retention rate, and only through washing to obtain pure whisker.
(2) reduce wastage of material: before modified with machine water run off calcium sulfate crystal whiskers up to 40%-60%, after modification, whisker retention, can corresponding minimizing whisker consumption up to more than 95%.
(3) paper performance is strengthened: modified whisker whiteness significantly improves, and can improve Paper White Degree.The character of the fortifying fibre itself had can improve paper tensile strength, tear strength, folding endurance, pop strength etc. greatly.
(4) alleviate the burden of water treatment: the ion that the calcium sulfate crystal whiskers run off with plain boiled water ionizes out, to equipment, there is corrosive nature, Ca
2+also can increase water hardness, affect product property, modified whisker Ca
2+complexing is complete, the Ca ionized out
2+amount reduces, and alleviates the burden of water treatment.
The application's method is simple, and step is few, conservation, alleviates water treatment burden, good product performance simultaneously, tensile strength, tear strength, folding endurance, pop strength etc.
As employed some vocabulary to censure special component in the middle of specification sheets and claim.Those skilled in the art should understand, and same composition may be called with different noun by production firm.This specification and claims are not used as with the difference of title the mode distinguishing composition, but are used as the criterion of differentiation with composition difference functionally." comprising " as mentioned in the middle of specification sheets and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable limit of error, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.Specification sheets subsequent descriptions is implement the better embodiment of the application, and right described description is for the purpose of the rule that the application is described, and is not used to the scope limiting the application.The protection domain of the application is when being as the criterion depending on the claims person of defining.
Also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the commodity of a series of key element or system not only comprises those key elements, but also comprise other key elements clearly do not listed, or also comprise by this commodity or the intrinsic key element of system.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within the commodity or system comprising described key element and also there is other identical element.
Above-mentioned explanation illustrate and describes some preferred embodiments of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in invention contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the present invention, then all should in the protection domain of claims of the present invention.
Claims (9)
1. a surface modifying method for calcium sulfate crystal whiskers, is characterized in that, comprises the following steps:
Prepare anhydrous calcium sulfate whisker;
Prepare surface modifier solution;
Described anhydrous calcium sulfate whisker is slowly added described surface modifier solution while stirring, slowly stirs, reaction, carries out the surface modification of anhydrous calcium sulfate whisker;
By the anhydrous calcium sulfate whisker reacting liquid filtering after surface modification, wash filter cake with water, wash away unreacted properties-correcting agent, by the filtration cakes torrefaction after washing, pulverize.
2. the surface modifying method of calcium sulfate crystal whiskers as claimed in claim 1, it is characterized in that, described anhydrous calcium sulfate whisker step of preparing is: to containing Ca
2+trade effluent in add crystalline form growth substance, heated solution, dropwise drip H
2sO
4solution is to Ca
2+precipitate completely, by filtering after described precipitation precipitation, washing, dry to obtain anhydrous calcium sulfate whisker.
3. the surface modifying method of calcium sulfate crystal whiskers as claimed in claim 2, it is characterized in that, described crystalline form growth substance is MgCl
26H
2o, described solution Heating temperature is more than 40 DEG C, described H
2sO
4strength of solution is 10%-40%, and the described precipitation time is 2-8h, and described bake out temperature is 200-450 DEG C.
4. the surface modifying method of calcium sulfate crystal whiskers as claimed in claim 3, it is characterized in that, the described solution step preparing surface-modifying agent is: mixed by Inorganic surface modifiers, be dissolved in water, adjust ph, forms stabilizing solution.
5. the surface modifying method of calcium sulfate crystal whiskers as claimed in claim 4, it is characterized in that, described pH value is 8-10, and described Inorganic surface modifiers liquid quality fraction is 0.01%-5%, and described Inorganic surface modifiers quality is the 1%-30% of described anhydrous calcium sulfate whisker quality.
6. the surface modifying method of calcium sulfate crystal whiskers as claimed in claim 5, it is characterized in that, described Inorganic surface modifiers quality is 3% of described anhydrous calcium sulfate whisker quality.
7. the surface modifying method of calcium sulfate crystal whiskers as claimed in claim 6, it is characterized in that, described Inorganic surface modifiers comprises Sodium hexametaphosphate 99, tripoly phosphate sodium STPP and zinc sulfate, by quality ratio Sodium hexametaphosphate 99: tripoly phosphate sodium STPP: zinc sulfate=0.7-1.2:0.7-1.2:0.5-1.0.
8. the surface modifying method of calcium sulfate crystal whiskers as claimed in claim 7, it is characterized in that, in described anhydrous calcium sulfate whisker surface modification step, modified-reaction temperature is 10 DEG C-80 DEG C, and the described reaction times is 0.5-2 hour.
9. the surface modifying method of calcium sulfate crystal whiskers as claimed in claim 8, it is characterized in that, described modified-reaction temperature is 70 DEG C.
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| CN201510765193.4A CN105350084A (en) | 2015-11-11 | 2015-11-11 | Surface modification method for calcium sulfate whiskers |
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Cited By (8)
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|---|---|---|---|---|
| CN106087064A (en) * | 2016-06-29 | 2016-11-09 | 青海大学 | A kind of Method in situ modification of calcium sulfate crystal whiskers |
| CN106368050A (en) * | 2016-11-01 | 2017-02-01 | 四川理工学院 | Papermaking raw material prepared from modified calcium sulfate whiskers and application |
| CN106400118A (en) * | 2016-10-13 | 2017-02-15 | 昆明冶金研究院 | Surface modification method for preparing anhydrous calcium sulfate whisker difficult to dissolve in water |
| CN106497142A (en) * | 2016-11-01 | 2017-03-15 | 四川理工学院 | A kind of method of modifying of calcium sulfate crystal whiskers paper making raw material |
| CN106811801A (en) * | 2017-01-24 | 2017-06-09 | 东南大学 | A kind of preparation method of modified gypsum whisker |
| CN108360070A (en) * | 2018-01-19 | 2018-08-03 | 西安建筑科技大学 | A kind of normal temperature modified method improving hemihydrate calcium sulfate crystal whisker stability |
| CN108914205A (en) * | 2017-03-30 | 2018-11-30 | 奕通工程顾问股份有限公司 | The manufacturing method of ca sulphate fibre and the coating for using it |
| CN109111732A (en) * | 2018-07-10 | 2019-01-01 | 芜湖市元奎新材料科技有限公司 | The thermally conductive wear-resistant material of nylon |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087064A (en) * | 2016-06-29 | 2016-11-09 | 青海大学 | A kind of Method in situ modification of calcium sulfate crystal whiskers |
| CN106400118A (en) * | 2016-10-13 | 2017-02-15 | 昆明冶金研究院 | Surface modification method for preparing anhydrous calcium sulfate whisker difficult to dissolve in water |
| CN106368050A (en) * | 2016-11-01 | 2017-02-01 | 四川理工学院 | Papermaking raw material prepared from modified calcium sulfate whiskers and application |
| CN106497142A (en) * | 2016-11-01 | 2017-03-15 | 四川理工学院 | A kind of method of modifying of calcium sulfate crystal whiskers paper making raw material |
| CN106497142B (en) * | 2016-11-01 | 2018-04-06 | 四川理工学院 | A kind of method of modifying of calcium sulfate crystal whiskers paper making raw material |
| CN106811801A (en) * | 2017-01-24 | 2017-06-09 | 东南大学 | A kind of preparation method of modified gypsum whisker |
| CN108914205A (en) * | 2017-03-30 | 2018-11-30 | 奕通工程顾问股份有限公司 | The manufacturing method of ca sulphate fibre and the coating for using it |
| CN108360070A (en) * | 2018-01-19 | 2018-08-03 | 西安建筑科技大学 | A kind of normal temperature modified method improving hemihydrate calcium sulfate crystal whisker stability |
| CN109111732A (en) * | 2018-07-10 | 2019-01-01 | 芜湖市元奎新材料科技有限公司 | The thermally conductive wear-resistant material of nylon |
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Application publication date: 20160224 |