CN112208258A

CN112208258A - Method for dewatering and reinforcing water-saturated paint woodware in semi-solid mode

Info

Publication number: CN112208258A
Application number: CN202011078140.2A
Authority: CN
Inventors: 陈子繁; 江旭东; 赵晓龙; 胡涛; 张晓珑; 黄敏; 黄娟; 夏鹏
Original assignee: HUBEI PROVINCIAL MUSEUM
Current assignee: HUBEI PROVINCIAL MUSEUM
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-01-12

Abstract

The invention discloses a method for dehydrating and reinforcing saturated water paint wooden ware in a semi-solid mode, and relates to a method for dehydrating and reinforcing the cultural relics of the saturated water paint wooden ware obtained by archaeological excavation. The semi-solid reinforcing agent mainly comprises the following components: 0.2-1% of starch-acrylic acid copolymerized water-absorbent resin, 9-11% of cyclodextrin, 0.2-2.1% of dodecylbenzene sulfonic acid, 0.1-0.2% of calcium chloride and 87-89% of 30% concentration glyoxal solution; the preparation method comprises the following steps: putting a 30% glyoxal solution into a beaker, and heating to 60 degrees; adding cyclodextrin into glyoxal solution with concentration of 30% and stirring until the cyclodextrin is completely dissolved, adding dodecylbenzene sulfonic acid and calcium chloride and continuously stirring until the cyclodextrin is completely dissolved, and standing to room temperature; thirdly, putting the starch-acrylic acid copolymerized water-absorbent resin into the prepared solution until the resin is fully absorbed and taking out. The dehydrated lacquer wooden ware cultural relics have stable size, the shrinkage rate is less than 1 percent, and the requirements of cultural relic protection are completely met; the method is suitable for dewatering and reinforcing the water-saturated paint wooden ware cultural relics obtained by archaeological excavation.

Description

Method for dewatering and reinforcing water-saturated paint woodware in semi-solid mode

Technical Field

The invention relates to a dehydration and reinforcement method of water-saturated paint wooden ware cultural relics obtained by archaeological excavation, in particular to a method for dehydrating and reinforcing water-saturated paint wooden ware in a semi-solid mode.

Background

A large amount of precious lacquer wood cultural relics are excavated in archaeology in China, wherein most of ancient lacquer wares excavated underground have good raw lacquer film layers and do not lose the brilliance. However, the carcass of the lacquerware is rotten, and the water content is generally 100-400%, even up to 700%. The cultural relics have extremely high cultural and artistic values. For the protection of the water-saturated paint wooden ware cultural relics, the traditional physical and chemical methods are basically adopted, and the spraying or soaking is mainly carried out through chemical medicines. However, the traditional spray or immersion dehydration has many limitations, such as that large-scale wood components in the site are in a complicated environment of mud-wood mixing, and the water-saturated paint wooden ware cultural relics under the conditions are basically impossible to complete dehydration, reinforcement and protection under the liquid form.

Therefore, it is necessary to research a semi-solid dehydration-reinforced material. In order to achieve this, the delivery of the dehydrated reinforcement material to the cultural relics to be protected is an extremely safe and effective method; the method is to use a cationic polymer carrier and glyoxal to form a semi-solid compound to dehydrate and reinforce the water-saturated paint wooden ware cultural relics.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings in the prior art and provide a method for dehydrating and reinforcing water-saturated paint woodware in a semi-solid mode.

The purpose of the invention is realized as follows:

mono-and semisolid reinforcing agent

1. Components of semisolid reinforcing agent (weight percentage)

The semi-solid reinforcing agent mainly comprises the following components:

and (3) verification:

the sum of the lower limits of all the components is less than 100 percent, and the sum of the upper limits of all the components is more than 100 percent;

the sum of the lower limit of each component plus the upper limit of the other components is greater than 100%;

the sum of the upper limit of each component plus the lower limit of the other components is less than 100%.

2. Preparation method of semisolid reinforcing agent

The preparation method of the semi-solid reinforcing agent comprises the following steps:

putting a 30% glyoxal solution into a beaker, and heating to 60 degrees;

adding cyclodextrin into glyoxal solution with concentration of 30% and stirring until the cyclodextrin is completely dissolved, adding dodecylbenzene sulfonic acid and calcium chloride and continuously stirring until the cyclodextrin is completely dissolved, and standing to room temperature;

thirdly, putting the starch-acrylic acid copolymerized water-absorbent resin into the prepared solution until the resin is fully absorbed and taking out.

3. Application of semisolid reinforcing agent

Wrapping the semi-solid reinforcing agent with 500-mesh nylon mesh cloth (preventing soil particles on the cultural relic from adhering or adhering to the surface of the cultural relic), placing the mixture on the surface of the cultural relic, sealing the cultural relic with a preservative film, standing until the semi-solid reinforcing agent permeates into the cultural relic, cleaning the wrapped nylon mesh cloth, and finally naturally drying the lacquer wooden cultural relic in the shade in an environment with the temperature of about 20 ℃ and the humidity of 50-60%.

4. Function of each component

1) Starch-acrylic acid copolymerized water-absorbent resin

The starch-acrylic acid copolymerized water-absorbent resin is an outsourcing product; is a polymer carrier of the cultural relic protective agent.

2) Cyclodextrin

The cyclodextrin is an outsourcing product, and specifically adopts beta-cyclodextrin; for polymerization with a 30% strength glyoxal solution.

3) Dodecyl benzene sulfonic acid is an outsourcing product; acting as a penetrant.

4) Calcium chloride is an outsourcing product; is a moisture regulator.

5) The glyoxal solution with the concentration of 30 percent is an outsourcing product; is a cultural relic dehydration reinforcing agent.

5. Mechanism of operation

The semi-solid reinforcing agent is made of starch-acrylic acid copolymerized water-absorbing resin, can bear glyoxal at high load, releases glyoxal to water-saturated paint wooden ware cultural relics under high load, and can not be extruded by a simple physical method; the load-bearing resin is used for bearing the glyoxal in a coating mode, and the release of the glyoxal is controlled according to different types and bearing rates; the method has simple process, convenient use and wide application range; the liquid state performance is still maintained although the liquid state is in a semi-solid state; the method has high operability on the wooden cultural relics in different spaces and complex environments.

The invention has the following advantages and positive effects:

firstly, the dimension of the paint woodware cultural relic after dehydration is stable, the shrinkage rate is less than 1 percent, and the requirement of cultural relic protection is completely met;

secondly, the semi-solid concept and technology are used for dewatering and reinforcing the water-saturated lacquer wood cultural relics for the first time, a new field of the semi-solid reagent for dewatering the lacquer wood cultural relics is developed, and the blank of the semi-solid technology in the application of repairing the water-saturated lacquer wood cultural relics is filled;

and the dehydration and reinforcement of the water-saturated paint wooden ware cultural relics obtained by archaeological excavation are suitable.

Drawings

FIG. 1 is a resin-coated picture (without plastic wrap) of a water-saturated wood lacquer;

FIG. 2 is a drawing showing the dehydration state of the water-saturated wood resin (with plastic wrap);

FIG. 3 is a pre-dehydration state picture;

fig. 4 is a picture of the dehydrated state.

Detailed Description

The following detailed description of the embodiments is made with reference to the accompanying drawings

Optimum value of the first, semi-solid reinforcing agent component

According to the weight percentage:

second, Experimental conditions

1. Wood block sample dehydration operation treatment step and dehydration effect evaluation

1) Test sample

The wood block sample is unearthed woodware residual block, and the tree species is nanmu; the absolute water content of the sample nanmu is 420%.

2) Wood block sample dewatering operation treatment step

And (3) dehydration by a semi-solid method:

A. and (3) infiltration treatment: preparing a semi-solid reinforcing agent according to the decay degree of the wooden cultural relic, coating the wood test block with a clean surface, wrapping the wood test block with a transparent film (calculating the permeation time according to the decay degree of the wooden cultural relic), and taking out the wood test block and naturally drying the wood test block in the shade after the permeation time is up;

B. dehydration polymerization: and (3) naturally drying the taken wood block sample in the shade in an environment with the temperature of about 20 ℃ and the humidity of 50-60%.

As shown in fig. 1 and 2, it can be seen that: the semi-solid packaging mode is only an operation process.

C. Stability of external dimension of test block

The dimensions of the water-saturated wood block before and after dehydration and reinforcement are shown in fig. 3 and 4, and it can be seen that:

table 1: size before and after semi-solid reinforcing agent wrapping dehydration

Therefore, the semi-solid dehydration method is used for dehydrating and reinforcing the painted woodware, the size of the dehydrated painted woodware cultural relics is stable, the shrinkage rate is less than 1%, and the requirements of cultural relic protection are completely met.

Claims

1. A method for dehydrating and reinforcing water-saturated paint woodware in a semi-solid mode is characterized by comprising the following steps:

the semi-solid reinforcing agent mainly comprises the following components:

0.2-1% of starch-acrylic acid copolymerized water-absorbent resin;

9-11% of cyclodextrin;

0.2-2.1% of dodecyl benzene sulfonic acid;

0.1-0.2% of calcium chloride;

87-89% of glyoxal solution with the concentration of 30%;

putting a 30% glyoxal solution into a beaker, and heating to 60 degrees;

thirdly, putting the starch-acrylic acid copolymerized water-absorbent resin into the prepared solution until the resin is fully absorbed and taking out;

application of the semisolid reinforcing agent:

wrapping the semi-solid reinforcing agent with 500-mesh nylon mesh cloth, placing the nylon mesh cloth on the surface of the cultural relic, sealing the cultural relic with a preservative film, standing until the semi-solid reinforcing agent permeates into the cultural relic, cleaning the wrapped nylon mesh cloth, and naturally drying the lacquer wooden ware cultural relic in the shade at the temperature of about 20 ℃ and the humidity of 50-60%.