CN1261624C - Gypsum whisker, its preparation method and application - Google Patents
Gypsum whisker, its preparation method and application Download PDFInfo
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- CN1261624C CN1261624C CN 03145595 CN03145595A CN1261624C CN 1261624 C CN1261624 C CN 1261624C CN 03145595 CN03145595 CN 03145595 CN 03145595 A CN03145595 A CN 03145595A CN 1261624 C CN1261624 C CN 1261624C
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- gypsum
- crystal
- crystal whisker
- whisker
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Abstract
The present invention relates to a gypsum whisker which is a semi-hydrated gypsum crystal in an acicular alpha shape; the diameter of the semi-hydrated gypsum crystal is from 2 to 4 micro M, and the length diameter ratio is from 50 to 100. The present invention has the production method that natural or chemical dihydrate gypsum is used as a raw material; the production method comprises the steps of milling, slurry proportioning, liquid separation, surface processing and drying. The present invention is characterized in that 0.1 to 0.5 wt % of gypsum whisker used as a seed crystal is added in the process of proportioning, and 0.1 to 0.5% of alkali-metal fatty acid used as a crystal transforming agent is added. The present invention has multiple purposes.
Description
Technical field
The present invention relates to field of inorganic chemical engineering, particularly a kind of crystal whisker of gypsum and manufacture method and application.
Background technology
Crystal whisker of gypsum claims gypsum fiber again, in 1903, finds that with semi-hydrated gypsum needle crystal it is different from gypsum crystallization (column crystallization), and the U.S., Japan, Britain are in the research in this field and use early, and technology is also advanced.
Chinese patent discloses " a kind of method of producing gypsum fiber " (CN1337369), and the not too big difference of this method and common gypsum crystalline production method can only be produced gypsum crystal, and be can not produce crystal whisker of gypsum.
Summary of the invention
The purpose of this invention is to provide a kind of crystal whisker of gypsum and manufacture method thereof.
Another object of the present invention provides several purposes of above-mentioned crystal whisker of gypsum.
The present invention realizes by following scheme:
A kind of crystal whisker of gypsum is the crystallization of a kind of needle-like alpha semi-hydrated gypsum, and its diameter is 2-4 μ m, and length-to-diameter ratio is 50-100.
A kind of production method of crystal whisker of gypsum, with natural or chemical dihydrate gypsum is raw material, its process comprises: grinding, join slurry, hydro-thermal reaction, liquid-solid separation, surface treatment, drying, the crystal whisker of gypsum that adds 0.1-0.5% (weight) in blending process is a crystal seed, and to add alkali-metal soap 0.1-0.5% (weight) be crystal modifier;
Above-mentioned surface treatment process is with the dilute solution of polyvinyl alcohol crystal whisker of gypsum to be carried out surface spray to handle.
The application of crystal whisker of gypsum is mixed and made into slurry with crystal whisker of gypsum and wood pulp cellulose, lime carbonate, starch, retention aid and water, can obtain toughness and flexible good incombustible paper through copying paper.
The application of crystal whisker of gypsum, with crystal whisker of gypsum with make slurry after wood pulp cellulose, starch, retention aid mix and add water after copying paper or obtain tensile strength and higher newsprinting paper and the writing paper of pop strength.
The application of crystal whisker of gypsum joins crystal whisker of gypsum in the thermoplastic resin, can be used as strongthener.
The application of crystal whisker of gypsum is with crystal whisker of gypsum and the mixed plasterboard of β terra alba.
The application of crystal whisker of gypsum, with crystal whisker of gypsum and α gypsum, small amounts of sodium hydroxide and whipping agent are mixed and made into the porous thermal insulating goods.
The application of crystal whisker of gypsum joins crystal whisker of gypsum in the rubber, can be used as strongthener.
The application of crystal whisker of gypsum is with crystal whisker of gypsum and α type gypsum, the mixed lagging material of perlite.
Crystal whisker of gypsum of the present invention is after surface treatment, and it is stable to be insoluble in water, whisker, has been widely used.
The production method of crystal whisker of gypsum of the present invention is simple, efficient is high.
Embodiment
With natural dihydrate gypsum (or citric acid waste gypsum) is raw material, with its 30 gram and the mixed slip that gets of 240 gram water, pH value is transferred to 4, carry out hydro-thermal reaction at 115-150 ℃, about 2 hours of reaction times, when rising to 90-92 ℃, temperature of reaction adds crystal seed crystal whisker of gypsum 40mg, and adding crystal modifier dodecyl sulphate potassium 30mg, it is fully reacted, filter, material after the filtration under agitation carries out surface spray with the dilute solution of polyvinyl alcohol to crystal whisker of gypsum to be handled, and the sprinkling amount of polyvinyl alcohol is the 0.01-0.05% of weight of material, carries out drying then, drying is carried out in 120 ℃ of baking ovens, the crystal whisker of gypsum mean diameter 2-4 μ m that obtains, average aspect ratio about 80, its water tolerance is splendid.
Application example:
Example 1: get crystal whisker of gypsum 75% of the present invention (weight), add wood pulp cellulose 15% (w), lime carbonate 10% (w) therein, said mixture is added certain water gaging, add starch 2% (w), retention aid 1% (w) obtains slurry, adopt laboratory write by hand machine to copy paper, can obtain toughness and flexible good incombustible paper.
Example 2: with crystal whisker of gypsum 20-40% provided by the invention (weight), the wood pulp cellulose that adds 60-80% (weight) therein, said mixture is added a certain amount of water, add starch 2%, retention aid 1%, the slip that obtains adopts laboratory write by hand machine to copy paper, can be used for various newsprinting papers and writing paper.And whisker provided by the invention strengthens the filling material as paper, can improve paper tensile strength and pop strength.
Example 3: crystal whisker of gypsum provided by the invention respectively with 10% (weight), 20%, 30% ratio, is added in the thermoplastic resin nylon, and its tensile strength and flexural strength are as follows
| Crystal whisker of gypsum (weight %) | Density (g/cm 3) | Tensile strength (Mpa) | Bending strength (Mpa) | Cantilever beam impact strength (kg-cm/cm 2) | Heat-drawn wire (℃) (18.6kg/cm 2) |
| 0 | 1.122 | 70.2 | 90.1 | 7.9 | 65 |
| 10 | 1.194 | 81.1 | 108.9 | 3.4 | 107 |
| 20 | 1.274 | 85.3 | 117.5 | 3.1 | 140 |
| 30 | 1.364 | 83.6 | 119.9 | 2.8 | 177 |
As can be seen from the above table, crystal whisker of gypsum can be used as the strongthener of thermoplastic resin nylon, improves tensile strength and flexural strength, demonstrates its excellent characteristic.
Example 4: with crystal whisker of gypsum 10% provided by the invention (weight), mix with common gypsum powder (β powder) 100% (weight), the water that adds 65% (weight), inject the die trial of 4 * 4 * 16mm standard, after its hardenite drying, folding strength improves 58% than the dried folding strength of simple β powder hardenite.
| Sample | Proportioning (weight %) | Folding strength (Mpa) | ||
| The β powder | Crystal whisker of gypsum | Mixing water | ||
| β powder (natural product) is commercial | 100 | 0 | 65 | 4.0 |
| 100 | 10 | 65 | 6.3 | |
Example 5: with 60 parts of crystal whisker of gypsum provided by the invention (weight), with 100 parts of alpha semi-hydrated gypsums, and small amounts of sodium hydroxide, add 280 parts of entry, add 1 part of whipping agent aluminium part again, mix the slip that obtains, be cast in the model, after the foaming sclerosis, porous article be can make, lagging material and sound-proof material can be used as.
Example 6: with 100 parts of crystal whisker of gypsum provided by the invention (weight), with 80 parts of alpha semi-hydrated gypsums, 50 parts of perlites (unit weight 0.6), 350 parts in water mixes the slip that obtains, and is cast in the model, can obtain the lagging material of unit weight below 0.7.
As can be seen from the above embodiments, crystal whisker of gypsum provided by the invention, with various base materials compound after, have various characteristics, the matrix material that available can be good, and have purposes widely.
Claims (2)
1, a kind of production method of crystal whisker of gypsum, crystal whisker of gypsum is the crystallization of a kind of needle-like alpha semi-hydrated gypsum, its diameter is 2-4 μ m, length-to-diameter ratio is 50-100, its production method is: with natural or chemical dihydrate gypsum is raw material, technological process comprises: grinding, join slurry, hydro-thermal reaction, liquid separation, surface treatment, drying, the crystal whisker of gypsum that it is characterized in that adding 0.1-0.5 weight % in blending process is a crystal seed, and to add alkali-metal soap 0.1-0.5 weight % be crystal modifier, and this crystal modifier is a dodecyl sulphate potassium.
2, the production method of crystal whisker of gypsum according to claim 1 is characterized in that its surface treatment is with polyvinyl alcohol solution crystal whisker of gypsum to be carried out surface spray to handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03145595 CN1261624C (en) | 2003-07-08 | 2003-07-08 | Gypsum whisker, its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03145595 CN1261624C (en) | 2003-07-08 | 2003-07-08 | Gypsum whisker, its preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1477242A CN1477242A (en) | 2004-02-25 |
| CN1261624C true CN1261624C (en) | 2006-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03145595 Expired - Fee Related CN1261624C (en) | 2003-07-08 | 2003-07-08 | Gypsum whisker, its preparation method and application |
Country Status (1)
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| CN (1) | CN1261624C (en) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317430C (en) * | 2004-05-18 | 2007-05-23 | 青海海兴科技开发有限公司 | Process for preparing calcium sulfate crystal whisker material |
| CN1314840C (en) * | 2004-06-14 | 2007-05-09 | 青岛科技大学 | Method for producing land plaster whiskers from phosphoric acid |
| CN100334264C (en) * | 2004-08-20 | 2007-08-29 | 东北大学 | Process for preparing calcium sulfate whisker |
| CN1324170C (en) * | 2004-11-30 | 2007-07-04 | 上海耀华纳米科技有限公司 | Process for preparing whisker calcium sulfate |
| US7588634B2 (en) * | 2006-09-20 | 2009-09-15 | United States Gypsum Company | Process for manufacturing ultra low consistency alpha- and beta- blend stucco |
| CN100451182C (en) * | 2007-01-23 | 2009-01-14 | 东北大学 | Production of non-metallic material calcium-sulfate whiskers |
| CN101230483B (en) * | 2007-11-05 | 2010-06-09 | 安徽工业大学 | Method for preparing gypsum whisker by calcium citrate |
| CN101311355B (en) * | 2008-04-24 | 2012-05-02 | 云南民族大学 | Process for preparing calcium sulphate whiskers from ardealite |
| CN102503336A (en) * | 2011-11-01 | 2012-06-20 | 赤壁人和建材有限公司 | Heat-insulation fireproof sound-absorbing ecological gypsum board made of composite materials |
| CN102490248A (en) * | 2011-11-15 | 2012-06-13 | 赤壁人和建材有限公司 | Fiber gypsum board production process and equipment |
| CN102515592A (en) * | 2011-12-25 | 2012-06-27 | 河南佰利联化学股份有限公司 | Hemihydrate gypsum production method |
| CN102584122A (en) * | 2012-02-15 | 2012-07-18 | 江苏省一夫新材料科技有限公司 | Building heat preservation mortar |
| CN102677177B (en) * | 2012-04-13 | 2015-08-26 | 昆明理工大学 | A kind of preparation method of high length-diameter ratio hemihydrate calcium sulfate crystal whisker |
| CN102776569A (en) * | 2012-07-09 | 2012-11-14 | 泰山医学院 | Method for preparing calcium sulfate crystal whiskers by using natural gypsum |
| CN103664011A (en) * | 2013-12-13 | 2014-03-26 | 江苏省一夫新材料科技有限公司 | Cement-based composite material and preparation method thereof |
| CN103834997B (en) * | 2014-03-10 | 2017-01-25 | 常州碳酸钙有限公司 | Method for preparing calcium carbonate whisker from saccharose by assisting hydrothermal process |
| CN104030648B (en) * | 2014-06-09 | 2016-03-09 | 孙红芳 | A kind of lightweight fireproof insulating type composition board |
| CN105502980A (en) * | 2014-09-26 | 2016-04-20 | 河南佰利联化学股份有限公司 | Industrial production process for white titanium gypsum with low water content |
| CN105439483A (en) * | 2014-09-26 | 2016-03-30 | 河南佰利联化学股份有限公司 | Method for producing low-water-content white titanium gypsum |
| CN104313727B (en) * | 2014-10-10 | 2016-08-17 | 孙红芳 | A kind of method utilizing alabaster to prepare gypsum fiber |
| US10246378B2 (en) | 2014-10-16 | 2019-04-02 | Georgia-Pacific Gypsum Llc | Building products composites and methods |
| CN106149456B (en) * | 2015-03-31 | 2018-03-20 | 北新集团建材股份有限公司 | A kind of crystal whisker of gypsum air filter paper and preparation method thereof |
| CN104861241A (en) * | 2015-06-09 | 2015-08-26 | 苏州市湘园特种精细化工有限公司 | Moderate-strength rubber diaphragm and preparation method thereof |
| CN106811801A (en) * | 2017-01-24 | 2017-06-09 | 东南大学 | A kind of preparation method of modified gypsum whisker |
| CN110438568B (en) * | 2019-07-31 | 2024-02-27 | 一夫科技股份有限公司 | Method and system for producing gypsum whisker by using citric acid gypsum |
| CN111170661B (en) * | 2020-02-12 | 2021-09-21 | 烟台大学 | Green process for preparing gypsum whisker reinforced cement-based material from titanium gypsum |
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2003
- 2003-07-08 CN CN 03145595 patent/CN1261624C/en not_active Expired - Fee Related
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