CN108547176A - A method of repairing paper material face crack - Google Patents
A method of repairing paper material face crack Download PDFInfo
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- CN108547176A CN108547176A CN201810358351.8A CN201810358351A CN108547176A CN 108547176 A CN108547176 A CN 108547176A CN 201810358351 A CN201810358351 A CN 201810358351A CN 108547176 A CN108547176 A CN 108547176A
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- paper
- cellulose
- crackle
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- fracture
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/18—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00 of old paper as in books, documents, e.g. restoring
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D105/00—Coating compositions based on polysaccharides or on their derivatives, not provided for in groups C09D101/00 or C09D103/00
- C09D105/04—Alginic acid; Derivatives thereof
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
The present invention provides a kind of method of crackle or fracture that repairing paper material, includes the following steps：Paper material face crack to be repaired or incision position are cleaned out；Paper material to be repaired is positioned on horizontal plane, carries over that the compound colloidal solution of sodium alginate/nano-cellulose is applied to tearing seam by paper original texture, crackle or incision position splice；After splicing is stablized, to interface drop coating Ca2+Solution, after it is parched, the jelly to overflowing paper is cleared up, that is, completes the reparation to crackle or fracture.After paper repairing, crackle or fracture make up smooth, and crackle or incision position are without raised or sunken, any surface finish, and crackle is with original paper without apparent visible aberration.PH after repairing at paper crack can reach alkalescent.The mechanical property of paper is obviously improved, while ensureing that significant change does not occur for the performance of paper original sample.
Description
Technical field
The invention belongs to the technical fields that high molecular material is combined with paper archives conservation, and in particular to a kind of reparation paper
The method of material face crack.
Background technology
Carrier of the paper as word and bibliographic file, plays the part of important role in log history, cultural inheritance.Papery
Bibliographic file paper complexity, paper type is various, with various types of paper slips on one page archives, with a variety of words on one page archives
Mark is write, and situations such as fracture, abrasion, grain rotten, color fading occurs respectively in the paper pasted.Paper is brittle, spreading and sinking in of writing is spread,
Paper tear, paper warped injustice, paper rust spot, the writing back of the body is saturating, the hand-written ambiguous situation of writing is also very common.Therefore,
Protection and reparation for precious document and archives are to put that one in face of us urgent and difficult task.
The cracking of paper material leads to the mechanical properties decrease of paper, therefore to carry out necessary repairing to the crackle of paper
And reinforcing.Paper is a kind of multi-phase complex and heterogeneous high molecular material, and cellulose is the main component of paper, in addition there are
Minimal amount of lignin and hemicellulose.Paper once has crackle, just has occurred that irreversible deformation, paper repairing
Purpose is exactly to make crackle as far as possible using certain bonding technology according to the type of paper crackle, the fracture morphology of fiber, crackle
Or fracture is taken back by perfection.
Invention content
It is an object of the invention to be directed to defect existing for paper material, proposition is a kind of to utilize sodium alginate/nanofiber
The method that the compound colloidal solution of element repairs the crackle or fracture of paper material.
The method of the crackle or fracture provided by the present invention for repairing paper material, includes the following steps：
1) paper material face crack to be repaired or incision position are cleaned out；
2) paper material to be repaired is positioned on horizontal plane, carries over paper original texture by sodium alginate/nanofiber
The compound colloidal solution of element is applied to tearing seam, crackle or incision position and is spliced；
3) after splicing is stablized, to the slow drop coating Ca of interface2+Solution, after it is parched, to overflow paper jelly into
Row cleaning, that is, complete the reparation to crackle or fracture.
In above method step 1), when clearing up paper material face crack or incision position to be repaired, if it is necessary, can
It is cleaned using water or corresponding reagent.
In above method step 2), the compound colloidal solution of the sodium alginate/nano-cellulose is by including following
What the method for step was prepared：
A) by the method for sulphuric acid hydrolysis and combination of ultrasound, microcrystalline cellulose is prepared into nano-cellulose；
B) by sodium alginate with nano-cellulose is compound obtains the compound colloidal solution of sodium alginate/nano-cellulose.
Wherein, it is described a) in, it is first that microcrystalline cellulose is soluble in water, cellulose suspension is made, under condition of ice bath, to
The concentrated sulfuric acid is wherein added dropwise, is kept stirring, is uniformly mixed, isothermal reaction, ultrasonication is carried out to solution after reaction, is repeated
Centrifugation obtains the nano cellulose crystal colloid that pH value is 6.0~7.0, and freeze-drying obtains powdered nano-cellulose.
Wherein, the proportioning of microcrystalline cellulose and water can be 1.0g：80~120ml.
The concentrated sulfuric acid is the concentrated sulfuric acid that mass fraction is 64.0%.
The temperature of the isothermal reaction can be 60~70 DEG C, and the time can be 2~4 hours.
The time of the ultrasonication can be 0.5~1 hour.
The condition of the centrifugation is：8~15min is centrifuged under the rotating speed of 8000~15000r/min.
It is described b) in, it is first that sodium alginate is soluble in water, be dispersed with stirring, temperature control, it is lasting to stir, nano-cellulose is added,
It is kept stirring, the pH to 9.0 of solution is adjusted during being dispersed with stirring, is cooled to room temperature, it is gluey to obtain the high milky of dispersion degree
Solution, the as compound colloidal solution of sodium alginate/nano-cellulose.
Wherein, the proportioning of sodium alginate and water can be 1.0g：80~120ml.
The mass ratio of sodium alginate and nano-cellulose can be 3.0~7.0：1.0.
In step 3), the Ca2+Solution can be the calcium chloride solution of 0.5~0.9mol/L.
In above method step 3), drop coating Ca2+It, can be quiet at room temperature by covering the rice paper of micro- profit on paper after solution
It sets, it is made to parch.
The above method may also include before the operation for carrying out step 1) to paper material face crack to be repaired or fracture
Image Acquisition is carried out, and carries out the operation of damaged degree analysis to the state of crackle or fracture.
The above method may also include after step 3) carries out Image Acquisition to paper material face crack after reparation or fracture,
And the operation of repairing effect is compared and analyzed with the state of preprosthetic crackle or fracture.
Described image acquisition can be realized by using pixel in 10,000,000 or more camera.
The compound colloidal solution of above-mentioned sodium alginate/nano-cellulose is in paper material face crack or fracture are repaired
Using also belonging to protection scope of the present invention.
The material of the present invention for repairing paper crackle has the characteristics that colourless and universality is strong, and the present invention is used
Reparation be invertibity reparation, modification material paper will not be adversely affected.
Description of the drawings
Fig. 1 is the image comparison that front and back paper is repaired in the embodiment of the present invention 1.
Fig. 2 is the image comparison that front and back paper is repaired in the embodiment of the present invention 2.
Specific implementation mode
Below by specific embodiment, the present invention will be described, but the present invention is not limited thereto.
Experimental method used in following embodiments is conventional method unless otherwise specified；Institute in following embodiments
Reagent, material etc., are commercially available unless otherwise specified.
Chemical reagent employed in following embodiments：
Sodium alginate：(C6H7NaO6)n, AR, CALCIUM CHLORIDE DIHYDRATE：CaCl2·2H2O, AR, microcrystalline cellulose：
(C6H10O5)n, AR, sodium hydroxide：NaOH, AR, hydrochloric acid：HCl, AR, the concentrated sulfuric acid：H2SO4, AR, deionized water.
The compound colloidal solution of sodium alginate/nano-cellulose employed in following embodiments is prepared by following methods
It obtains：
It takes microcrystalline cellulose 0.5g to be put in 50ml water, cellulose suspension is made.Under conditions of ice bath, thereto by
It is added dropwise to the concentrated sulfuric acid (mass fraction 64%), is kept stirring rate, is uniformly mixed.It is afterwards that mixed solution is permanent under the conditions of 65 DEG C
Temperature reaction 3 hours.Ultrasonication 1 hour is carried out to suspension, then through high speed centrifugation 12000r/min, be repeated several times to
The nano cellulose crystal colloid for being about 7.0 to pH value, it is freeze-dried to obtain powdered nano-cellulose.
0.5g sodium alginates are dissolved in 50ml deionized waters, system is disperseed using temperature control magnetic stirring apparatus, are controlled
Solution temperature processed is 50 DEG C, and whipping process continues 1 hour.Nano-cellulose 0.1g is added thereto again, is kept stirring rate.
During system is disperseed, the pH for adjusting solution is about 9.0, and test interval is every 20 minutes 3 times, and pH regulation and control reagents are
The NaOH solution of 0.5mol/L and the HCl solution of 0.5mol/L.After 1 hour, solution is naturally cooled into room temperature, you can divided
The high milky colloidal solution of divergence.
Ca employed in following embodiments2+Solution is prepared by the following method：
Prepare Ca2+The calcium chloride solution of a concentration of 0.7mol/L uniformly mixes, stand for standby use in beaker.
The test method of mechanical property (tensile strength and folding strength) as used in the following examples is as follows：Using model
NZ-135 folding strengths instrument is to paper folding strength according to ISO 5626:1993 are tested；Using model KZW-300 micro-control anti-tensiles
Testing machine is to paper tensile strength according to ISO 1924-2:2008 are tested.
According to ISO 6588-1:2012 the methods carry out the paper after reinforcement and repair the test of pH value：Materials 2g
It is extracted 1 hour with 100mL cold distilled waters, the pH of extract is measured in 20~25 DEG C of environment.
The coloration of paper before and after reparation is tested using model NH310 color difference meters.
Embodiment 1
The pattern for taking Renmin University of China's school bulletin newspaper part in 1981 with crackle, splits paper material surface
Line fracture carries out Image Acquisition (camera picture number is 16,000,000), and the status and appearance in crackle and fracture section is：Single crack, lines
Compared with rule, without other tiny crackings, cross-section fibers size is shorter.Crackle and fracture are cleared up, while being cleaned at crack
Pattern to be repaired is positioned on horizontal glass face by dust granule etc., carries over paper original texture by sodium alginate/nanofiber
The compound colloidal solution of element is applied to crackle and incision position is spliced, after splicing is stablized, to interface drop coating Ca2+Solution, and
The rice paper for covering a micro- profit on it, stands after it is parched at room temperature, and the jelly to overflowing paper is cleared up, i.e., complete
At the reparation of crackle or fracture.Carrying out Image Acquisition to paper material face crack fracture after reparation, (camera picture number is 1600
Ten thousand), and with the state of preprosthetic crackle or fracture compare and analyze that (color difference analysis is with the coloration of body paper sample crack periphery
Primary colours).
Fig. 1 is the front and back image comparison of repairing, and it is as shown in table 1 to repair front and back performance parameter comparison：
The performance parameter comparison of paper before and after 1 Crack Repairing of table
By Fig. 1 and table 1 it is found that after paper repairing, crackle or fracture make up smooth, and crackle or incision position are without protrusion or recessed
It falls into, any surface finish, crackle is with original paper without apparent visible aberration.PH after repairing at paper crack can be carried moderately
High and close neutrality.Paper after reparation, tensile strength reach original tensile strength 85.2%, and folding strength reaches original resistance to
Folding degree 64.2% (two-fold number), mechanical property is obviously improved, and will not cause the change of the original mechanical property of pattern.
Embodiment 2
The pattern for taking a rice paper part with crackle carries out Image Acquisition (phase to paper material face crack fracture
Ten thousand) for 1600, the status and appearance in crackle and fracture section is machine picture number：Single crack, lines are opened there are tiny at one compared with rule
It splits, cross-section fibers longer dimension.Fracture and cracking are cleared up, while cleaning the dust granule at crack etc., will be to be repaired
Pattern be positioned on horizontal glass face, carry over paper original texture and apply the compound colloidal solution of sodium alginate/nano-cellulose
It smears and is spliced in crack, cracking；After splicing is stablized, to interface drop coating Ca2+Solution, and a surname of a micro- profit is covered on it
Paper is stood after it is parched at room temperature, and the jelly to overflowing paper is cleared up, that is, completes to repair.After the completion of repairing, to repairing
Paper material face crack fracture carries out Image Acquisition (camera picture number is 16,000,000) after multiple, and with preprosthetic crackle or fracture
State compare and analyze (color difference analysis is using the coloration of body paper sample crack periphery as primary colours).
Fig. 2 is the front and back image comparison of repairing, and it is as shown in table 2 to repair front and back performance parameter comparison：
The performance parameter comparison of paper before and after 2 Crack Repairing of table
By Fig. 2 and table 2 it is found that after paper repairing, crackle or fracture make up smooth, and crackle or incision position are without protrusion or recessed
It falls into, any surface finish, crackle is with original paper without apparent visible aberration.PH after repairing at paper crack can reach weak
Alkalinity.The tensile strength of paper reaches the 91.7% of original tensile strength, and folding strength reaches the 86.8% of original folding strength, mechanics
Performance is obviously improved, while ensureing that significant change does not occur for the performance of paper original sample.
Claims (10)
1. application of the compound colloidal solution of sodium alginate/nano-cellulose in paper material face crack or fracture are repaired.
2. application according to claim 1, it is characterised in that：The compound glue of the sodium alginate/nano-cellulose is molten
Liquid is prepared by the method included the following steps：
A) by the method for sulphuric acid hydrolysis and combination of ultrasound, microcrystalline cellulose is prepared into nano-cellulose；
B) by sodium alginate with nano-cellulose is compound obtains the compound colloidal solution of sodium alginate/nano-cellulose.
3. application according to claim 2, it is characterised in that：It is described a) to be：It is first that microcrystalline cellulose is soluble in water, it is made
The concentrated sulfuric acid is added dropwise under condition of ice bath in cellulose suspension thereto, is kept stirring, and is uniformly mixed, isothermal reaction is right
Solution carries out ultrasonication after reaction, and repeated centrifugation obtains the nano cellulose crystal colloid that pH value is 6.0~7.0, freezing
It is dry, obtain powdered nano-cellulose.
4. application according to claim 3, it is characterised in that：It is described a) in, the proportioning of microcrystalline cellulose and water is 1.0g：
80~120ml；
The concentrated sulfuric acid is the concentrated sulfuric acid that mass fraction is 64%；
The temperature of the isothermal reaction is 60~70 DEG C, and the time is 2~4 hours；
The time of the ultrasonication is 0.5~1 hour；
The condition of the centrifugation is：8~15min is centrifuged under the rotating speed of 8000~15000r/min.
5. application according to claim 2, it is characterised in that：It is described b) to be：It is first that sodium alginate is soluble in water, stirring point
It dissipates, temperature control, it is lasting to stir, nano-cellulose is added, is kept stirring, the pH to 9.0 of solution is adjusted during being dispersed with stirring, it is cooling
To room temperature, the high milky colloidal solution of dispersion degree, the as compound colloidal solution of sodium alginate/nano-cellulose are obtained.
6. application according to claim 5, it is characterised in that：It is described b) in, the proportioning of sodium alginate and water is 1.0g：80
~120ml；
The mass ratio of sodium alginate and nano-cellulose is 3.0~7.0：1.0.
7. a kind of method of crackle or fracture that repairing paper material, includes the following steps：
1) paper material face crack to be repaired or incision position are cleaned out；
2) paper material to be repaired is positioned on horizontal plane, carries over paper original texture by sodium alginate/nano-cellulose
Compound colloidal solution is applied to tearing seam, crackle or incision position and is spliced；
3) after splicing is stablized, to the slow drop coating Ca of interface2+Solution, after it is parched, the jelly to overflowing paper carries out clear
Reason, that is, complete the reparation to crackle or fracture.
8. according to the method described in claim 7, it is characterized in that：In step 3), the Ca2+Solution is 0.5~0.9mol/L
Calcium chloride solution.
9. method according to claim 7 or 8, it is characterised in that：In step 3), drop coating Ca2+After solution, by paper
The rice paper of the upper micro- profit of covering, stands, it is made to parch at room temperature.
10. according to the method described in any one of claim 7-9, it is characterised in that：The method is in the behaviour for carrying out step 1)
Further include that Image Acquisition is carried out to paper material face crack to be repaired or fracture, and to the state of crackle or fracture before work
Carry out the operation of damaged degree analysis；
Further include Image Acquisition being carried out to paper material face crack after reparation or fracture, and split with preprosthetic after step 3)
The state of line or fracture compares and analyzes the operation of repairing effect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810358351.8A CN108547176B (en) | 2018-04-20 | 2018-04-20 | Method for repairing surface cracks of paper material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810358351.8A CN108547176B (en) | 2018-04-20 | 2018-04-20 | Method for repairing surface cracks of paper material |
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| CN108547176B CN108547176B (en) | 2021-03-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794014A (en) * | 2020-06-03 | 2020-10-20 | 西安工业大学 | Method for repairing fracture disease of ancient painting and calligraphy |
| CN112962348A (en) * | 2021-02-05 | 2021-06-15 | 青岛大学 | Method for repairing damaged and aged paper archive paper |
| CN114148111A (en) * | 2021-11-08 | 2022-03-08 | 南京博物院 | Paper cultural relic biological mark repairing agent and preparation method and application thereof |
| CN114687243A (en) * | 2020-12-25 | 2022-07-01 | 山东齐元信息技术有限公司 | Chromatographic debonding process for archive bricks |
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Patent Citations (4)
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| CN1448427A (en) * | 2003-04-23 | 2003-10-15 | 中国科学院广州化学研究所 | Water dispersible nanometer avicel, its prep.and colloid therefrom |
| CN103590281A (en) * | 2012-08-14 | 2014-02-19 | 金东纸业（江苏）股份有限公司 | Surface sizing solution, and surface sizing solution used sized paper |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794014A (en) * | 2020-06-03 | 2020-10-20 | 西安工业大学 | Method for repairing fracture disease of ancient painting and calligraphy |
| CN114687243A (en) * | 2020-12-25 | 2022-07-01 | 山东齐元信息技术有限公司 | Chromatographic debonding process for archive bricks |
| CN114687243B (en) * | 2020-12-25 | 2023-04-07 | 山东齐元信息技术有限公司 | Chromatographic debonding process for archive bricks |
| CN112962348A (en) * | 2021-02-05 | 2021-06-15 | 青岛大学 | Method for repairing damaged and aged paper archive paper |
| CN114148111A (en) * | 2021-11-08 | 2022-03-08 | 南京博物院 | Paper cultural relic biological mark repairing agent and preparation method and application thereof |
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