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Preparation method of nanometer hydrophobic calcium oxalate powder for protection coating of stone cultural relics

A technology for protecting coatings and stone cultural relics, which is applied in the field of preparation of nano-hydrophobic calcium oxalate powder for stone cultural relics protection coatings, which can solve the problems of filling stone micropores, short life, and damage to cultural relics, so as to reduce free energy and operate The effect of short process, energy consumption and no pollution

Active Publication Date: 2017-05-31
LUOYANG INST OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of existing stone cultural relics protection materials such as filling stone micropores, short service life, and destroying cultural relics after failure, the present invention provides a nano-hydrophobic calcium oxalate powder for stone cultural relics protection coatings The preparation method of the nano-calcium oxalate powder has bionic properties, good hydrophobicity, strong weather resistance, good wear resistance, long service life, and will not damage stone cultural relics after failure

Method used

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  • Preparation method of nanometer hydrophobic calcium oxalate powder for protection coating of stone cultural relics

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preparation example Construction

[0026] A preparation method of nano-hydrophobic calcium oxalate powder for stone cultural relic protection coating, the preparation steps are as follows:

[0027] Step 1: Take a certain amount of oxalate, prepare an oxalate solution with deionized water, and add a certain amount of chelating agent (the amount of oxalate is equal to that of the chelating agent). After the chelating agent is completely dissolved, add 4~6wt% surfactant therein, stir for 30min, after fully mixing, a uniform solution is obtained and set aside;

[0028]Step 2: Take a certain amount of calcium salt, prepare a calcium salt solution with deionized water, and use a dropping funnel to dilute the calcium chloride solution with 1~2mL min -1 The dropping rate is dropped into the solution prepared in step 1 (the amount of calcium salt and oxalate is equal). Observe that the reaction is complete, and then continue magnetic stirring for 30 min. Centrifuge the white turbid liquid, wash twice with deionized wa...

Embodiment 1

[0038] A preparation method of nano-hydrophobic calcium oxalate powder for stone cultural relic protection coating, the preparation steps are as follows:

[0039] Step 1: Take a certain amount of sodium oxalate and prepare 0.5mol L with deionized water -1 Sodium oxalate solution, to which is added a certain amount of ammonium citrate (the amount of sodium oxalate and ammonium citrate is equal). After the ammonium citrate is completely dissolved, add 4wt% OP-10 to it, stir for 30 minutes, and mix thoroughly to obtain a uniform mixed solution, which is set aside;

[0040] Step 2: Take a certain amount of calcium chloride and prepare 0.5mol L with deionized water -1 Calcium chloride solution, use a dropping funnel to dilute the calcium chloride solution at 1mL min -1 Drop into the mixed solution prepared in step 1 (the amount of calcium chloride and sodium oxalate is equal). Observe that the reaction is complete, and then continue magnetic stirring for 30 min. The resulting w...

Embodiment 2

[0045] A preparation method of nano-hydrophobic calcium oxalate powder for stone cultural relic protection coating, the preparation steps are as follows:

[0046] Step 1: Take a certain amount of potassium oxalate and prepare 0.4mol L with deionized water -1 Potassium oxalate solution, to which is added a certain amount of potassium tartrate (the amount of potassium oxalate and potassium tartrate is equal). After potassium tartrate is all dissolved, add 5wt% polyethylene glycol 200 wherein, stir 30min, after fully mixing, obtain uniform mixed solution, standby;

[0047] Step 2: Take a certain amount of calcium nitrate and prepare 0.4mol L with deionized water -1 Calcium nitrate solution, use a dropping funnel to dilute the calcium nitrate solution at 2mL min -1 The dropping rate is dropped into the mixed solution prepared in step 1 (the amount of calcium nitrate and potassium oxalate is equal). Observe that the reaction is complete, and then continue magnetic stirring for 3...

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Abstract

The invention relates to a preparation method of nanometer hydrophobic calcium oxalate powder for a protection coating of stone cultural relics. The preparation method comprises preparing calcium oxalate and modifying the prepared calcium oxalate. The nanometer hydrophobic calcium oxalate powder has bionic performances, good hydrophobicity, good weatherability, good abrasion resistance and a long service life and does not damage stone cultural relics after losing effect. The preparation method has the advantages of simple processes, good production conditions, low processing cost and effective prevention of erosion of stone cultural relics.

Description

technical field [0001] The invention relates to the technical field of materials for protection of stone cultural relics, in particular to a method for preparing nano-hydrophobic calcium oxalate powder for coatings for protection of stone cultural relics. Background technique [0002] Cultural relics are the witness and imprint of the historical development of a country and a nation. They not only contain rich cultural, artistic and scientific values, but also are more precious because of their non-renewability. Our country has a long history. In the splendid history and culture, the ancients left us a large number of precious cultural relics and historic sites, a considerable part of which are stone cultural relics. Many of these stone cultural relics have been included in the World Cultural Heritage List by UNESCO, such as Dunhuang Mogao Grottoes, Longmen Grottoes, Dazu Rock Carvings, Leshan Giant Buddha, etc. The remaining stone cultural relics have suffered through the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D5/16C07C51/41C07C51/42C07C53/10
CPCC07C51/412C07C51/42C08K5/098C08K9/04C08K9/06C08K2201/011C09D5/1681C09D7/63C07C53/10
Inventor 张拦丁梧秀颜冬闫永艳李秀倜韦莹倩盛希凯
Owner LUOYANG INST OF SCI & TECH
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