EP2626464B1 - Composition de désacidification de papier, procédé permettant de l'obtenir et son procédé d'application - Google Patents
Composition de désacidification de papier, procédé permettant de l'obtenir et son procédé d'application Download PDFInfo
- Publication number
- EP2626464B1 EP2626464B1 EP11464027.9A EP11464027A EP2626464B1 EP 2626464 B1 EP2626464 B1 EP 2626464B1 EP 11464027 A EP11464027 A EP 11464027A EP 2626464 B1 EP2626464 B1 EP 2626464B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- composition
- deacidification
- cmc
- hap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
Definitions
- the present invention relates to a new chemical composition based on a suspension of hydroxyapatite nanoparticles (HAp) in carboxymethyl-cellulose (CMC) in alcoholic solution (isopropylic alcohol), used for paper deacidification, by acidity anihilation from 4.5 to 7.2.
- HAp hydroxyapatite nanoparticles
- CMC carboxymethyl-cellulose
- alcoholic solution isopropylic alcohol
- the paper degradation due to an excessive acidity (due to chemical or biological action), is reflected by the yellow tonalities appearance accompanied by an increased brittlement of the paper, which is transformed into a very fragile substance that is destroyed at the slightest touch.
- the acid hydrolysis of cellulose that occurs during aging represents about 95% of the paper damages, and is considered as the most significant cause of deterioration of cellulosic materials.
- Acid attack causes a random attack on hemi-acetal bonds between different constituents of cellulose molecules. This reaction will weaken the molecules, leading to the brittlement of cellulosic materials.
- the present invention is to provide a new method for paper safeguard and conservation, by using nanosized hydroxyapatite (30 nm), mixed with carboxymethyl cellulose (the last compound being a compound with similar structure with the structure of the paper) in isopropanol solvent (solvent environment friendly and non-toxic), and prevent the destruction or impairment of the recognized printed or printed paper.
- HA hydroxyapatite
- CMC carboxymethyl-cellulose
- HAp carboxymethyl-cellulose
- CMC carboxymethyl-cellulose
- HAp hidroxyapatite
- the functional groups that contain pairs of positive charged ions of calcium and clusters of six atoms of oxygen negative charge associated with phosphate crystal triplets, generating hexagonal crystals with a columnar shape with Ca: P 1.67.
- the ions Ca, P and hydroxyl groups, are located on the HA surface.
- the two components of the composition HAp are interacting only by weak hydrogen bonds.
- the interaction between CMC with HAp in this composition is visible in FTIR spectra through the widening of OH group bands (3500-3000 cm -1 ).
- the electrostatic binding of the two components will be favored, too, forasmuch due to acidic pH, Ca 2+ ions located on the surface of HAp come into contact with the -COO 2- anions from the CMC surface.
- the electrostatic link between these two components is stabilizing and neutralizing the paper pH where it is sprayed (visible at 1460 cm -1 band of the FTIR spectrum, attributed to ionic pair -Ca 2+ COO 2- ).
- the atmospheric CO 2 has the ability to react with none of these two components, the risk of transformation of pH paper from the basic range to acidic one, is practically null.
- composition hidroxyapatite carboxymethyl cellulose prepared by us, has the following advantages:
Landscapes
- Paper (AREA)
Claims (3)
- Une composition constituée par: hydroxyapatite et carboxyméthyl cellulose (50% - 50%) dans 100 ml d'alcool Isopropylique.
- Une procédé d'obtenir d'une composition selon la revendication 1 caractérisé en ce qu'il consiste à les étapes suivantes: la production d'une suspension du carboxyméthyl cellulose dans l'alcool isopropylique, la production des nanoparticules d'hydroxyapatite, combinant les components obtenus dans les proportions suivantes: 0,2 g de HA CMC, 100 ml d'alcool isopropylique en agitant vigoureusement.
- Utilisation de la composition selon la revendication 1, pour la désacidification de papier, comprenant les étapes consistant à: enlever la poussière, le polissage avec des dispositifs mécaniques, nettoyage mécanique, l'enlèvement des dépôts de cire sèche, et en appliquant du cette composition par la pulvérisation sur la surface du papier endommagée, ce qui induit la désacidification de papier, en annihilation de l'acidité du papier à partir d'une pH 4,5 jusqu'a le domaine alcalin pH = 7,2, puis séchage pendant 24 heures à température ambiante.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11464027.9A EP2626464B1 (fr) | 2011-12-15 | 2011-12-15 | Composition de désacidification de papier, procédé permettant de l'obtenir et son procédé d'application |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11464027.9A EP2626464B1 (fr) | 2011-12-15 | 2011-12-15 | Composition de désacidification de papier, procédé permettant de l'obtenir et son procédé d'application |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2626464A1 EP2626464A1 (fr) | 2013-08-14 |
EP2626464B1 true EP2626464B1 (fr) | 2017-03-22 |
Family
ID=45524317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11464027.9A Active EP2626464B1 (fr) | 2011-12-15 | 2011-12-15 | Composition de désacidification de papier, procédé permettant de l'obtenir et son procédé d'application |
Country Status (1)
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EP (1) | EP2626464B1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109028229B (zh) * | 2018-09-29 | 2020-10-02 | 佛山市云米电器科技有限公司 | 一种带视觉检测模块油烟机的换档方法 |
CN109342382B (zh) * | 2018-11-23 | 2022-11-15 | 复旦大学 | 一种带有pH响应荧光探针的脱酸功能纸的制备方法 |
CN112206585A (zh) * | 2020-10-23 | 2021-01-12 | 徐少佐 | 空调过滤网自动清洗装置 |
CN113074379B (zh) * | 2021-03-30 | 2021-12-31 | 龙南鑫坤无机新材料有限公司 | 一种高温去除氮氧化物设备 |
CN113430863B (zh) * | 2021-07-21 | 2022-05-03 | 杭州众材科技股份有限公司 | 一种避免纸张水性脱酸后发生褶皱变形的干燥方法 |
CN114411446A (zh) * | 2022-02-17 | 2022-04-29 | 复旦大学 | 一种脱酸加固抑菌复合功能保护剂及其制备方法与应用 |
CN116334955B (zh) * | 2023-02-17 | 2024-05-03 | 甘继东 | 一种纸张修复装置 |
ES2943162A1 (es) * | 2023-03-30 | 2023-06-09 | Univ Pablo De Olavide | Composicion para la desacidificacion de materiales celulosicos, metodo y usos |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3676182A (en) * | 1970-08-31 | 1972-07-11 | Richard Daniel Smith | Treatment of cellulosic materials |
US5208072A (en) | 1988-09-30 | 1993-05-04 | Fmc Corporation | Mass treatment of cellulosic materials |
US5091111A (en) | 1990-09-19 | 1992-02-25 | S. C. Johnson & Son, Inc. | Aqueous emulsion and aersol delivery system using same |
US5770148A (en) | 1996-01-16 | 1998-06-23 | Preservation Technologies, L.P. | Method and apparatus for the deacidification of library materials |
US6676856B1 (en) | 1998-01-09 | 2004-01-13 | Richard Daniel Smith | Deacidification treatment of printed cellulosic materials |
US6593408B1 (en) * | 1998-11-13 | 2003-07-15 | Mitsui Chemicals, Inc. | Organic polymer/inorganic fine particle-dispersed aqueous solution having excellent stability and uses thereof |
DE19921616B4 (de) | 1998-11-16 | 2007-06-28 | Zfb Project-Management Gmbh | Entsäuerungsmittel und Verfahren zur Entsäuerung von organischem Material |
EP1468143A1 (fr) | 2002-01-15 | 2004-10-20 | Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase, C.S.G.I | Suspension basique, elaboration de cette suspension, et procede de desacidification du papier |
ITFI20020052A1 (it) | 2002-03-28 | 2003-09-29 | Consorzio Interuniversitario P | Processo per la preparazione di nano - e micro-particelle di ossidi eidrossidi di metalli del secondo gruppo e di transizione, nano-e micro |
US20080017336A1 (en) * | 2004-02-27 | 2008-01-24 | Wolfgang Wachter | Process For Preservation Of Cellulosic Materials |
JP2008520459A (ja) * | 2004-11-17 | 2008-06-19 | ビーエーエスエフ ソシエタス・ヨーロピア | マイクロカプセルを有するコーティングを有する包装材料 |
RO126570B1 (ro) | 2010-02-23 | 2014-08-29 | Institutul Naţional De Cercetare-Dezvoltare Pentru Chimie Şi Petrochimie - Icechim | Compoziţie şi procedeu de tratare, restaurare chimică şi dezinfecţie biologică a suprafeţei hârtiei documentelor din arhive şi biblioteci |
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2011
- 2011-12-15 EP EP11464027.9A patent/EP2626464B1/fr active Active
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EP2626464A1 (fr) | 2013-08-14 |
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