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Modified bentonite-based hydrogel precursor solution for protecting silicate cultural relics and preparation method and use method thereof

A technology of precursor solution and cultural relic protection, applied in the direction of amide/imide polymer adhesive, non-polymer adhesive additive, adhesive type, etc., can solve the problem of unmentioned hydrogel, weathering and shedding and other problems, to achieve good resistance to dry and wet cycles and salt crystallization aging cycles, excellent air permeability, and excellent water-carrying effects

Active Publication Date: 2021-09-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the long-term influence of natural factors, most of the silicate cultural relics have weathered and fallen off, and there is an urgent need for suitable materials to effectively protect them
However, the current protective materials are mostly nano protective coatings, epoxy materials, fluorine-containing materials and silane materials, etc., and there is no mention of the protection of hydrogel materials.

Method used

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  • Modified bentonite-based hydrogel precursor solution for protecting silicate cultural relics and preparation method and use method thereof
  • Modified bentonite-based hydrogel precursor solution for protecting silicate cultural relics and preparation method and use method thereof
  • Modified bentonite-based hydrogel precursor solution for protecting silicate cultural relics and preparation method and use method thereof

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Embodiment approach

[0030] As a specific embodiment of the present invention, a method for preparing a modified bentonite-based hydrogel precursor solution for the protection of silicate cultural relics comprises the following steps:

[0031] Step 1: Place the bentonite in an oven at 100-110°C for drying, disperse the dried bentonite in a mixed solution of deionized water and methanol to form the first dispersion system, and add ammonia water to the first dispersion system , stirring at a stirring speed of 1000-1500r / min at room temperature for 1-3h to form a second dispersion system;

[0032] Specifically, the mass ratio of bentonite to the mixed solution of deionized water and methanol is 0.9%-1.5%, the volume ratio of deionized water to methanol is 4:1, and the volume ratio of ammonia water to the first dispersion system is 3.5%-7 %.

[0033] Step 2: Add vinyltrimethoxysilane to the second dispersion system for reaction, react at 70-80°C for 20-30h, wash, centrifuge and dry the reaction produ...

Embodiment 1

[0043] A method for preparing a modified bentonite-based hydrogel precursor solution for the protection of silicate cultural relics, comprising the steps of:

[0044] Step 1: Place the bentonite in an oven at 110°C for drying, disperse the dried bentonite in a mixed solution of deionized water and methanol to form the first dispersion system, add ammonia water to the first dispersion system, and keep it at room temperature With a stirring speed of 1000r / min, stir for 3h to form the second dispersion system;

[0045] Specifically, the mass ratio of bentonite to the mixed solution of deionized water and methanol is 1.5%, the volume ratio of deionized water to methanol is 4:1, and the volume ratio of ammonia water to the first dispersion system is 7%.

[0046] Step 2: Add vinyltrimethoxysilane to the second dispersion system for reaction, react at 70°C for 20 hours, wash, centrifuge and dry the reaction product to obtain modified bentonite, such as figure 1 shown;

[0047] Spec...

Embodiment 2

[0057] A method for preparing a modified bentonite-based hydrogel precursor solution for the protection of silicate cultural relics, comprising the steps of:

[0058] Step 1: Place the bentonite in an oven at 110°C for drying, disperse the dried bentonite in a mixed solution of deionized water and methanol to form the first dispersion system, add ammonia water to the first dispersion system, and keep it at room temperature With a stirring speed of 1500r / min, stir for 2h to form the second dispersion system;

[0059] Specifically, the mass ratio of bentonite to the mixed solution of deionized water and methanol is 1%, the volume ratio of deionized water to methanol is 4:1, and the volume ratio of ammonia water to the first dispersion system is 3.5%.

[0060] Step 2: Add vinyltrimethoxysilane to the second dispersion system for reaction, react at 75°C for 24 hours, wash, centrifuge and dry the reaction product to obtain modified bentonite, such as figure 1 shown;

[0061] Spec...

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Abstract

The invention discloses a modified bentonite-based hydrogel precursor solution for protecting silicate cultural relics and a preparation method and a use method thereof. The preparation method comprises the following steps: preparing the modified bentonite-based hydrogel precursor solution and a deionized water diluted solution of tetramethylethylenediamine; uniformly mixing the modified bentonite-based hydrogel precursor solution with a deionized water diluted solution of tetramethylethylenediamine, and coating a to-be-repaired part of the silicate cultural relic with a mixed solution of the modified bentonite-based hydrogel precursor solution and the deionized water diluted solution of tetramethylethylenediamine; and attaching a repairing part of the silicate cultural relic to the to-be-repaired part of the silicate cultural relic so that a mixed solution of the modified bentonite-based hydrogel precursor solution and the deionized water diluted solution of tetramethylethylenediamine naturally forms the modified bentonite-based hydrogel, and bonding repairing of the silicate cultural relic is achieved.

Description

technical field [0001] The invention belongs to the technical field of silicate cultural relics protection materials, and in particular relates to a modified bentonite-based hydrogel precursor solution for the protection of silicate cultural relics, a preparation method and a use method thereof. Background technique [0002] Silicate materials are widely used in architectural decoration, etc. Cultural relics made of silicate materials are widely distributed in my country and constitute an important part of historical and cultural heritage. However, due to the long-term influence of natural factors, most of the silicate cultural relics have weathered and fallen off, and there is an urgent need for suitable materials to effectively protect them. However, the current protective materials are mostly nano-protective coatings, epoxy materials, fluorine-containing materials, and silane materials, etc., and the protection of hydrogel materials is not mentioned. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/68C08F220/56C08F222/38C08F2/44C08K9/06C08K3/34C09J133/26C09J11/04C09J11/06
CPCC04B41/68C04B41/5037C08F220/56C08F2/44C08K9/06C08K3/346C09J133/26C09J11/04C09J11/06C04B41/5007C04B41/46C04B41/4539C04B41/45C08F222/385C08K5/17
Inventor 潘爱钊史承钰和玲
Owner XI AN JIAOTONG UNIV
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