Preparation method of deacidification functional paper with pH-responsive fluorescent probe

A fluorescent probe and deacidification technology, which is applied in the direction of fluorescence/phosphorescence, material analysis through optical means, and measurement devices, can solve the problems of limited test accuracy and the inability to judge the effect of acidification degree of paper non-destructively, and achieve compatibility Good anti-aging, anti-aging degree, and the effect of inhibiting the acidification process

Active Publication Date: 2019-02-15
FUDAN UNIV +1
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  • Abstract
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Problems solved by technology

[0007] The method of judging the acidification degree and deacidification effect of paper is usually judged by the pH value. The usual methods include cold extraction method, hot extraction method and surface measurement method, but the first two methods are destructive detection methods, and the latter method The accuracy of the test is limited, and it is impossible to judge the degree of acidification and the effect of deacidification of the paper non-destructively

Method used

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  • Preparation method of deacidification functional paper with pH-responsive fluorescent probe
  • Preparation method of deacidification functional paper with pH-responsive fluorescent probe

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Effect test

Embodiment 1

[0027](1) The starch solution with a mass fraction of 3%, the mixture of nano-zinc oxide, nano-magnesium oxide, and nano-titanium dioxide with a mass fraction of 1% (mass ratio of 1:2:1) and water with a mass fraction of 96% were mixed at 40 Stirring for 12 hours at a speed of 50 revolutions per minute at a temperature of 0° C. to obtain a nano-alkaline composite deacidification agent solution of starch-grafted nano-zinc oxide, nano-magnesium oxide and nano-titanium dioxide.

[0028] (2) For the rhodamine isothiocyanate-grafted cellulose-based material, 1 g of microcrystalline cellulose was added to 5 ml of epichlorohydrin, and stirred at 40° C. for 5 hours. The reaction mixture was dialyzed with deionized water for 75 hours, 1 g of ammonium chloride was added to the suspension, stirred at 40° C. for 6 hours, and dialyzed with deionized water for 65 hours; 5 ml of dimethylformamide and 0.03 g of rhodamine isothiocyanate was stirred for 12 hours without light to obtain a cellul...

Embodiment 2

[0032] (1) The starch solution with a mass fraction of 5%, the mixture of nano-zinc oxide, nano-magnesium oxide, and nano-titanium dioxide with a mass fraction of 5% (mass ratio of 1:3:2) and 90% of water at 60 Stirring for 36 hours at a speed of 200 revolutions per minute at a temperature of °C to obtain a nano-alkaline composite deacidification agent solution of starch-grafted nano-zinc oxide, nano-magnesium oxide and nano-titanium dioxide.

[0033] (2) Add 1 g of microcrystalline cellulose to 8 ml of epichlorohydrin, and stir at 60° C. for 8 hours. The reaction mixture was dialyzed against deionized water for 70 hours, 3 g of ammonium chloride was added to the suspension, stirred at 60° C. for 18 hours, and dialyzed against deionized water for 75 hours. 20 ml of dimethylformamide and 0.08 g of rhodamine isothiocyanate were added to the suspension, and stirred for 36 hours without light to obtain a pH-responsive cellulose-based fluorescent probe.

[0034] (3) The nano-alkal...

Embodiment 3

[0037] (1) The starch solution with a mass fraction of 4%, the mixture of nano-zinc oxide, nano-magnesia, and nano-titanium dioxide with a mass fraction of 3% (mass ratio of 1:2:1) and water with a mass fraction of 93% were mixed at 50 Stirring at a speed of 100 rpm for 24 hours at a temperature of 100° C. to obtain a nano-alkaline composite deacidification agent solution of starch-grafted nano-zinc oxide, nano-magnesium oxide and nano-titanium dioxide.

[0038] (2) Add 1 g of microcrystalline cellulose to 10 ml of epichlorohydrin, and stir at 50° C. for 6 hours. The reaction mixture was dialyzed against deionized water for 80 hours, 2 g of ammonium chloride was added to the suspension, stirred at 50° C. for 12 hours, and dialyzed against deionized water for 80 hours. 10 ml of dimethylformamide and 0.06 g of rhodamine isothiocyanate were added to the suspension, and stirred for 24 hours without light to obtain a pH-responsive cellulose-based fluorescent probe.

[0039] (3) Th...

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Abstract

The invention provides deacidification functional paper with a pH-responsive fluorescent probe for solid-phase deacidification repair of paper and a preparation method thereof. The deacidification functional paper with the pH-responsive fluorescent probe can be obtained by sequentially loading a nano alkaline composite deacidification agent and the cellulose-based fluorescent probe on a paper base, wherein the nano alkaline composite deacidification agent is obtained by grafting reaction of starch with nano zinc oxide, nano magnesium oxide and nano titanium dioxide; and the cellulose-based fluorescent probe is a cellulose-based material grafted with rhodamine isothiocyanate. The deacidification functional paper with the pH-responsive fluorescent probe has the same compositions with ordinary paper, has no by-products in the deacidification process, can monitor the acidification degree of the paper through fluorescence intensity change of the fluorescent probe, adjust the alkalinity formula of the functional paper according to different acidification degrees, has the characteristics of being simple to use and convenient to replace, and is suitable for emergency deacidification repairand preventive protection of book paper.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a deacidification material for paper and a preparation technology thereof, in particular to a preparation method of deacidification functional paper with a pH response fluorescent probe. Background technique [0002] Paper relics in the form of ancient books, archives and documents are important cultural heritages of all mankind, which record the spread and development of human history and civilization. However, due to the limitations of the preservation environment and conditions, these paper materials are suffering from accelerated damage, and this has become a common problem faced by countries all over the world. Our country has thousands of years of history and culture, and there are many domestic museums, libraries and other book collection institutions with rich collections, and the total amount of paper cultural relics is very large. These precious historical and cultural m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 刘鹏唐颐闫玥儿章若红江艳禄春强
Owner FUDAN UNIV
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