A color adjustable desalination/deacidification reinforced nanomaterial for restoration and protection of cultural relics and its preparation method
A nano-material and type-adjusting technology, which is applied in the field of cultural relic restoration and protection and reinforcement materials, can solve the problems of whitening and poor permeability on the surface of cultural relics, and achieve the effect of dense internal structure, low viscosity and good dispersion stability of the sample
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Embodiment 1
[0036] Step 1: Nano(Ca,Ba)(OH) 2 powder preparation
[0037]Calcium chloride dihydrate and barium chloride dihydrate are used as precursors, sodium hydroxide is used as a precipitant, ethylene glycol is used as a reaction medium, and an appropriate amount of surfactant is added to prepare nano calcium hydroxide and hydrogen through the liquid phase precipitation reaction of the precursors. Barium oxide solid solution powder. During the powder preparation process, the amount of related substances used: n NaOH =1.2mol / L, the molar ratio of sodium hydroxide to calcium chloride dihydrate N=1.6. Surfactant accounts for 5% by weight.
[0038] The steps for preparing nano calcium hydroxide are as follows:
[0039] (1) Weighing quantitative calcium chloride dihydrate and barium chloride dihydrate and silane coupling agent KH-570 with a mass fraction of 5% are added to the Erlenmeyer flask, and then a certain volume of ethylene glycol is added thereto, and the conical Put the shap...
Embodiment 2
[0053] The first step: preparation of Ni-doped nano calcium hydroxide
[0054] In the experiment, calcium chloride dihydrate was used as the precursor, sodium hydroxide was used as the precipitating agent, ethylene glycol was used as the reaction medium, and an appropriate amount of surfactant was added to prepare Ni-doped nano-calcium hydroxide powder through the liquid phase precipitation reaction of the precursor. . During the colloid preparation process, the amount of related substances: n NaOH =1.2mol / L, the molar ratio of sodium hydroxide to calcium chloride dihydrate N=1.6, the percentage by weight of the surfactant is 5%, and the doping amount is 1%.
[0055] The steps of preparing doped nano calcium hydroxide are as follows:
[0056] (1) Take quantitative calcium chloride dihydrate and nickel chloride and silane coupling agent KH-570 of mass fraction 5% and add in the Erlenmeyer flask, then add a certain volume of ethylene glycol thereinto, the Erlenmeyer flask Put...
Embodiment 3
[0070] The first step: desalination reinforcement treatment
[0071] In this experiment, (Ca,Ba)(OH) 2 The powder is dispersed in the alcohol system to strengthen the severely weathered rock samples, and the SO in the leaching solution of the samples during the desalination and reinforcement process is analyzed by ion chromatography. 4 2- , Cl - concentrations were tested.
[0072] The steps of desalination reinforcement are as follows:
[0073] (1) Place the cleaned stone sample in an oven to dry at 105±2°C for 24 hours, take it out and place it in a desiccator to cool to room temperature;
[0074] (2) The sample was saturated with (NH 4 ) 2 CO 3 Solution dipping treatment;
[0075] (3) Reuse Ca(OH) 2 or (Ca,Ba)(OH) 2 The alcohol dispersion system is used to strengthen the rock sample;
[0076] (4) Soak the unreinforced sample and the reinforced sample in deionized water, and use an ion chromatograph to detect the concentration of ions in the leachate.
[0077] St...
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