CN111218848A - Hydrophobic book paper and preparation method thereof - Google Patents
Hydrophobic book paper and preparation method thereof Download PDFInfo
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- CN111218848A CN111218848A CN201911068264.XA CN201911068264A CN111218848A CN 111218848 A CN111218848 A CN 111218848A CN 201911068264 A CN201911068264 A CN 201911068264A CN 111218848 A CN111218848 A CN 111218848A
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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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/05—Derivatives containing elements other than carbon, hydrogen, oxygen, halogens or sulfur
- C08B15/06—Derivatives containing elements other than carbon, hydrogen, oxygen, halogens or sulfur containing nitrogen, e.g. carbamates
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F13/00—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
- D21F13/02—Making hand-made paper
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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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/18—Highly hydrated, swollen or fibrillatable fibres
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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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/20—Chemically or biochemically modified fibres
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Abstract
The invention discloses hydrophobic original book paper and a preparation method thereof, wherein the hydrophobic original book paper comprises original book paper bamboo fibers and hydrophobic modified nano-cellulose, and the quantitative amount of the hydrophobic original book paper is 24-30g/m2The water absorption is 12-15mm/60min, and the transverse tearing index is 18.5-20 mN.m2(iv) g, longitudinal tensile strength of 1.2-1.5 KN/m; wherein: the mass ratio of the bamboo fibers of the book paper to the hydrophobically modified nanocellulose is 1: 0.005-0.01. The invention adds modified nano-cellulose into celluloseIn the book paper, the hydrophobicity of the book paper is improved, the moisture-proof and mildew-proof effects are effectively achieved, and the book paper is not easy to absorb moisture and mildew when the environmental humidity is high, so that the storage time of the book paper is prolonged. In addition, the added hydrophobic modified nano-cellulose can be tightly combined with paper pulp fibers, so that the bonding force between fibers is improved, and the strength performance of the book paper can be obviously improved.
Description
Technical Field
The invention belongs to the technical field of papermaking, and particularly relates to hydrophobic book paper and a preparation method thereof.
Background
The original book paper is made up by using bamboo as main raw material and adopting a series of treatments and manual paper-making method. Is deeply liked by the amateurs of painting and calligraphy. However, the original book paper has single water absorption and ink moistening performance and lacks of serialized products with different performances; in addition, the strength of the book paper is poor, and the book paper is easy to break in the using process; the moisture absorption is large, and the mildew is easy to occur; therefore, the differential water absorption and ink absorption of the book paper and the proper improvement of the strength performance of the book paper become one of the key links of production. The technical problems to be solved by the invention are as follows:
1. reinforcement of book paper
The fiber raw material used by the original book paper is generally bamboo pulp, the fiber is short and small, the mixed cells are better, and the fiber bonding strength is poorer, so the fiber tension of the original book paper is not strong enough, is not resistant to pulling and tearing, and is easy to break in the processes of painting and calligraphy, storage or display, thereby causing loss.
2. Problem of water absorption and ink absorption of book paper
The prior art has single production process and relatively single water absorption and ink absorption. The water absorption and the ink absorption are generally controlled by an internal sizing method, and the method is poor in uniformity and unstable in sizing effect; in addition, the expressive force of the original book paper is poor after chemical sizing, artists or artistic enthusiasts pursue the expressive force in individuality and microcosmic aspects, the water absorption and ink absorption of the original book paper are required to be different, and the difference requirement of products is very large; accurate differentiation adjustment is difficult to achieve through the gluing mode.
3. Moisture and mildew prevention problem of book paper
The book paper is used as art paper and often records valuable artistic contents, but as a material mainly made of bamboo pulp fibers, the book paper has high moisture absorption and is easy to mildew, and particularly, the book paper is relatively moist in the south, which can cause mildew and loss of art works.
For the above reasons, the present application has been made.
Disclosure of Invention
In view of the problems or defects of the prior art, the invention aims to provide hydrophobic book paper and a preparation method thereof. According to the invention, the twice hydrophobic modified nanocellulose is added into the book paper, so that the hydrophobicity of the book paper is improved, the moisture-proof and mould-proof effects are effectively achieved, and the book paper is not easy to absorb moisture and mould when the environmental humidity is higher, thereby prolonging the storage time of the book paper.
In order to achieve the first object of the present invention, the present invention adopts the following technical solutions:
the hydrophobic original book paper comprises original book paper bamboo fibers and hydrophobic modified nanocellulose, and the basis weight of the hydrophobic original book paper is 24-30g/m2The water absorption is 12-15mm/60min, and the transverse tearing index is 18.5-20 mN.m2(iv) g, longitudinal tensile strength of 1.2-1.5 KN/m.
Further, according to the technical scheme, the mass ratio of the bamboo fibers of the book paper to the hydrophobically modified nano-cellulose is 1: 0.005-0.01.
Further, according to the technical scheme, the hydrophobically modified nano-cellulose is prepared by the following method, and the method comprises the following steps:
(1) diluting oxidized nano-cellulose into nano-cellulose water suspension with the concentration of 0.8-1.2%, and evaporating to obtain gel-like nano-cellulose; then uniformly mixing the gel-like nano cellulose with a dispersing agent N-N-dimethylformamide, and continuously stirring for 4-8h at a constant temperature of 80-85 ℃; adding n-heptanoic anhydride and 4-dimethylaminopyridine into the reaction system, dispersing at a high speed for 10-20min, heating to 100 ℃, continuing to react for 2-4h, cooling, and washing the product to obtain anhydride modified nano-cellulose;
(2) adding the acid anhydride modified nano-cellulose obtained in the step (1) into the acid anhydride modified nano-cellulose according to the mass ratio of 1: 1-2, uniformly mixing an n-undecamine solution and a tetradecylamine solution to obtain a mixed reaction solution, adjusting the pH value of the reaction solution to 7-8, and stirring and reacting at a constant temperature of 60-65 ℃ for 4-6 hours; and after the reaction is finished, centrifuging and washing the product, and finally performing dialysis treatment to obtain the hydrophobic modified nano-cellulose.
Further, in the technical scheme, the oxidized nano cellulose (ToCN) in the step (1) is prepared by oxidizing and high-pressure homogenizing cotton pulp by a TEMPO/NaBr/NaCl system.
Further, in the technical scheme, the mass ratio of the nano-cellulose in the step (1) to the n-heptanoic anhydride and the 4-dimethylaminopyridine is 1: 30-50: 0.5-1.5.
Further, in the above technical solution, the high-speed dispersion in the step (1) is specifically dispersion by using a high-speed dispersion machine, and the high-speed dispersion speed is 200 to 2000 r/min.
Further, in the above technical scheme, the concentration of the n-undecylamine solution in the step (2) is 3-5%, and the specific preparation method of the n-undecylamine solution is as follows: adding 3-5g of N-undecylamine into 100mL of N-N Dimethylformamide (DMF), and uniformly stirring.
Further, in the above technical scheme, the concentration of the tetradecylamine solution in the step (2) is 3-5%, and the specific preparation method of the tetradecylamine solution is as follows: adding 3-5g of tetradecylamine into 100mL of N-N Dimethylformamide (DMF), and uniformly stirring.
Further, in the technical scheme, the ratio of the mass of the acid anhydride modified nanocellulose in the step (2) to the mass sum of n-undecamine and tetradecylamine is 1: 0.4-0.7.
The second purpose of the invention is to provide a preparation method of the hydrophobic book paper, which comprises the following steps:
(a) cutting bamboo, soaking, boiling, washing, drying in the sun, beating, and blending into bamboo fiber suspension with concentration of 0.05-0.2% in a paper fishing tank;
(b) preparing hydrophobic modified nano-cellulose into dispersion liquid with the concentration of 2-5%, adding the dispersion liquid into the paper fishing groove in the step (a), putting the bamboo curtain into the paper fishing groove to lift up, uniformly spreading the fibers on the bamboo curtain, making wet paper sheets, pressing the wet paper sheets to dry, and finally drying to obtain the original book paper.
Compared with the prior art, the hydrophobic book paper and the preparation method thereof have the following beneficial effects:
(1) the hydrophobic modified nano-cellulose designed by the invention is prepared by esterifying nano-cellulose with n-heptanoic anhydride, and then reacting n-undecylamine and tetradecylamine with the esterified nano-cellulose through electrostatic adsorption to form a complex. The modified nano-cellulose is added into the book paper, so that the hydrophobicity of the product is improved, and the moisture-proof and mildew-proof effects are effectively achieved. So that the moisture and mildew are not easy to absorb when the environmental humidity is higher, thereby prolonging the storage time of the food.
(2) The method controls different water absorbability and ink absorbability by controlling the process of the hydrophobic modified nano-cellulose, such as concentration, dosage and the like, and adding the hydrophobic modified nano-cellulose into the original book paper so as to realize differentiation adjustment.
(3) According to the invention, the hydrophobic modified nano-cellulose is added, and the nano-cellulose has a large specific surface area and rich hydroxyl groups, and can be added into paper pulp to be tightly combined with paper pulp fibers, so that the bonding force between fibers is improved, the strength performance of the original writing paper can be obviously improved, and meanwhile, the chemical components of the nano-cellulose are the same as those of the plant fibers of the original writing paper, so that no adverse effect is caused on the painting and calligraphy of the original writing paper.
Drawings
FIG. 1 is a flow chart of the preparation process of the hydrophobic book paper of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to examples. The present invention is implemented on the premise of the technology of the present invention, and the detailed embodiments and specific procedures are given to illustrate the inventive aspects of the present invention, but the scope of the present invention is not limited to the following embodiments.
Various modifications to the precise description of the invention will be readily apparent to those skilled in the art from the information contained herein without departing from the spirit and scope of the appended claims. It is to be understood that the scope of the invention is not limited to the procedures, properties, or components defined, as these embodiments, as well as others described, are intended to be merely illustrative of particular aspects of the invention. Indeed, various modifications of the embodiments of the invention which are obvious to those skilled in the art or related fields are intended to be covered by the scope of the appended claims.
For a better understanding of the invention, and not as a limitation on the scope thereof, all numbers expressing quantities, percentages, and other numerical values used in this application are to be understood as being modified in all instances by the term "about". Accordingly, unless expressly indicated otherwise, the numerical parameters set forth in the specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained. At the very least, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
The preparation process of the invention is illustrated as follows: the method comprises the steps of carrying out esterification reaction on oxidized nano-cellulose by using n-heptanoic anhydride, and carrying out centrifugal washing after the reaction to obtain anhydride modified nano-cellulose; and carrying out amidation reaction on the modified nano-cellulose with n-undecylamine and tetradecylamine, and centrifugally washing for several times after the reaction is finished to obtain the twice modified nano-cellulose. Cutting bamboo, soaking, boiling, washing, drying in the sun, beating to obtain bamboo pulp, adding modified nano cellulose and bamboo pulp into a paper-fishing tank, mixing them, uniformly stirring them, and manually fishing paper to obtain the invented book paper.
The key 2 properties of the metabook paper developed in this invention are water absorption and physical strength properties. The higher the concentration of the added modified nanocellulose, the better the hydrophobicity of the paper and the deterioration of water absorption, while the addition of the modified nanocellulose also slightly improves the physical strength properties, but also needs to take into account the cost and the influence of the physical strength of the paper.
The nano-cellulose adopted in the invention is derived from cotton fiber raw materials, and has the advantages of environmental protection, degradability and the like.
The invention designs a novel method, which is characterized in that the nano-cellulose is subjected to hydrophobic modification through esterification reaction, the hydrophobicity of the nano-cellulose is further improved through amidation reaction, and then the nano-cellulose is added into the original book paper in pulp to improve the problems of the existing original book paper.
The concentration of each reagent of the present invention refers to the mass/volume percent concentration of the dispersoid and the dispersion medium in g/mL.
Example 1
The preparation method of the hydrophobic book paper of the embodiment comprises the following steps:
(1) preparing externally purchased oxidized nanocellulose (namely cotton pulp nanocellulose prepared by TEMPO oxidation-high pressure homogenization) into a nanocellulose water suspension with the concentration of 1%; then the 1.0% strength aqueous nanocellulose suspension is subjected to evaporation in a reactor, so that the suspension becomes gel-like; uniformly mixing the dispersant N-N-dimethylformamide and the gel-like nano-cellulose in another reactor according to the proportion, heating to 85 ℃, continuously stirring for 4 hours at constant temperature, continuously adding N-heptanoic anhydride and 4-dimethylaminopyridine, dispersing for 15 minutes at high speed (800 revolutions per minute), heating to 100 ℃, reacting for 2 hours, cooling for 15 minutes, and washing with methanol and deionized water to obtain the anhydride modified nano-cellulose; wherein: the mass ratio of the nano-cellulose to the n-heptanoic anhydride to the 4-dimethylaminopyridine is 1: 40: 1.0.
(2) respectively preparing a 4% N-undecamine solution and a tetradecylamine solution in N-N Dimethylformamide (DMF), and then mixing the N-undecamine solution and the tetradecylamine solution according to a mass ratio of 1: respectively adding the prepared n-undecamine solution and the prepared tetradecylamine solution into a reactor, mixing the n-undecamine solution and the prepared tetradecylamine solution with the anhydride modified nanocellulose aqueous solution obtained in the step (1), adjusting the pH value to 7.5 by using sodium hydroxide and hydrochloric acid, and reacting for 5 hours at a temperature of 65 ℃ by quickly stirring, wherein: the ratio of the mass of the anhydride modified nanocellulose to the mass sum of n-undecamine and tetradecylamine is 1: 0.4. after the reaction is finished, centrifugal washing is carried out for multiple times until the modified nano-cellulose is separated out, and then centrifugal washing is carried out for three times by using ethanol to remove unreacted amine. And (4) carrying out dialysis membrane treatment on the suspension to obtain the hydrophobic modified nano-cellulose, and storing for later use.
(3) Preparing the book paper: cutting bamboo, soaking, boiling, washing, drying in the sun, beating, mixing in paper-fishing tank to obtain bamboo fiber suspension with concentration of 0.08%(2) Preparing the obtained hydrophobic modified nano-cellulose into a solution with the concentration of 2%, adding the solution into a paper fishing groove, putting a bamboo curtain into the paper fishing groove to be lifted, uniformly spreading the fibers on the bamboo curtain to form a thin wet paper sheet, finally, moving the wet paper sheet obtained by the paper fishing to a wet paper pile beside the paper fishing groove, applying proper pressure to a squeezer to dry the moisture of the wet paper sheet, and finally, drying the paper to obtain the book paper of the invention, wherein the quantitative amount of the book paper is 24g/m2(ii) a Wherein: the bamboo fiber of the book paper: hydrophobically modified nanocellulose ═ 1: 0.008.
example 2
The preparation method of the hydrophobic book paper of the embodiment comprises the following steps:
(1) preparing externally purchased oxidized nanocellulose (namely cotton pulp nanocellulose prepared by TEMPO oxidation-high pressure homogenization) into a nanocellulose water suspension with the concentration of 0.8%; then the 1.0% strength aqueous nanocellulose suspension is subjected to evaporation in a reactor, so that the suspension becomes gel-like; uniformly mixing the dispersant N-N-dimethylformamide and the gel-like nano-cellulose in another reactor according to the proportion, heating to 80 ℃, continuously stirring for 8 hours at constant temperature, continuously adding N-heptanoic anhydride and 4-dimethylaminopyridine, dispersing for 20 minutes at high speed (1000 revolutions per minute), heating to 100 ℃, reacting for 4 hours, cooling for 20 minutes, and washing with methanol and deionized water to obtain the anhydride modified nano-cellulose; wherein: the mass ratio of the nano-cellulose to the n-heptanoic anhydride to the 4-dimethylaminopyridine is 1: 30: 0.5.
(2) respectively preparing a 3% N-undecamine solution and a tetradecylamine solution in N-N Dimethylformamide (DMF), and then mixing the N-undecamine solution and the tetradecylamine solution according to a mass ratio of 1: 1, respectively adding the prepared n-undecamine solution and the prepared tetradecylamine solution into a reactor, mixing and dissolving the n-undecamine solution and the tetradecylamine solution with the anhydride modified nanocellulose aqueous solution obtained in the step (1), adjusting the pH value to 7 by using sodium hydroxide and hydrochloric acid, and reacting for 4 hours at the temperature of 60 ℃ by quickly stirring, wherein: the ratio of the mass of the anhydride modified nanocellulose to the mass sum of n-undecamine and tetradecylamine is 1: 0.5. after the reaction is finished, centrifugal washing is carried out for multiple times until the modified nano-cellulose is separated out, and then centrifugal washing is carried out for three times by using ethanol to remove unreacted amine. And (4) carrying out dialysis membrane treatment on the suspension to obtain the hydrophobic modified nano-cellulose, and storing for later use.
(3) Preparing the book paper: cutting bamboo, soaking, boiling, washing, drying in the sun, beating, preparing into bamboo fiber suspension with concentration of 0.05% in a paper-fishing groove, preparing solution with concentration of 3% from the hydrophobic modified nano cellulose obtained in the step (2), adding the solution into the paper-fishing groove, putting the bamboo curtain into the paper-fishing groove to lift up, uniformly spreading the fiber on the bamboo curtain to form a thin wet paper sheet, finally transferring the wet paper sheet to a wet paper pile beside the paper-making groove, applying appropriate pressure to dry the moisture of the wet paper sheet by a squeezer, and finally drying the paper to obtain the book paper of the invention, wherein the basis weight of the book paper is 26g/m2(ii) a Wherein: the bamboo fiber of the book paper: hydrophobically modified nanocellulose ═ 1: 0.005.
example 3
The preparation method of the hydrophobic book paper of the embodiment comprises the following steps:
(1) preparing externally purchased oxidized nanocellulose (namely cotton pulp nanocellulose prepared by TEMPO oxidation-high pressure homogenization) into a nanocellulose water suspension with the concentration of 1.2%; then the 1.0% strength aqueous nanocellulose suspension is subjected to evaporation in a reactor, so that the suspension becomes gel-like; uniformly mixing the dispersant N-N-dimethylformamide and the gel-like nano-cellulose in another reactor according to the proportion, heating to 80 ℃, continuously stirring for 6 hours at constant temperature, continuously adding N-heptanoic anhydride and 4-dimethylaminopyridine, dispersing for 10 minutes at high speed (2000 r/min), heating to 100 ℃, reacting for 3 hours, cooling for 15 minutes, and washing with methanol and deionized water to obtain the anhydride modified nano-cellulose; wherein: the mass ratio of the nano-cellulose to the n-heptanoic anhydride to the 4-dimethylaminopyridine is 1: 50: 1.5.
(2) respectively preparing a N-undecamine solution and a tetradecylamine solution with the concentration of 5% in N-N Dimethylformamide (DMF), and then mixing the N-undecamine solution and the tetradecylamine solution according to the mass ratio of 1: 1.5 adding the prepared n-undecylamine solution and the prepared tetradecylamine solution into a reactor respectively, mixing the n-undecylamine solution and the prepared tetradecylamine solution with the anhydride modified nano-cellulose aqueous solution obtained in the step (1), adjusting the pH value to 8 by using sodium hydroxide and hydrochloric acid, and reacting for 6 hours at the temperature of 60 ℃ by stirring rapidly, wherein: the ratio of the mass of the anhydride modified nanocellulose to the mass sum of n-undecamine and tetradecylamine is 1: 0.7. after the reaction is finished, centrifugal washing is carried out for multiple times until the modified nano-cellulose is separated out, and then centrifugal washing is carried out for three times by using ethanol to remove unreacted amine. And (4) carrying out dialysis membrane treatment on the suspension to obtain the hydrophobic modified nano-cellulose, and storing for later use.
(3) Preparing the book paper: cutting bamboo, soaking, boiling, washing, drying in the sun, beating, preparing into bamboo fiber suspension with concentration of 0.2% in a paper-fishing groove, preparing solution with concentration of 5% from the hydrophobic modified nano cellulose obtained in the step (2), adding the solution into the paper-fishing groove, putting the bamboo curtain into the paper-fishing groove to lift up, uniformly spreading the fiber on the bamboo curtain to form a thin wet paper sheet, finally transferring the wet paper sheet to a wet paper pile beside the paper-making groove, applying appropriate pressure to dry the moisture of the wet paper sheet by a squeezer, and finally drying the paper to obtain the book paper of the invention, wherein the basis weight of the book paper is 30g/m2(ii) a Wherein: the bamboo fiber of the book paper: hydrophobically modified nanocellulose ═ 1: 0.01.
comparative example 1
The preparation method of the book paper provided by the comparative example comprises the following specific steps:
cutting bamboo, soaking, boiling, washing, drying in the sun, beating, blending into bamboo fiber suspension with concentration of 0.08% in a paper-fishing tank, then putting the bamboo curtain into the paper-fishing tank to lift up, uniformly spreading the fiber on the bamboo curtain to form a thin wet paper sheet, finally transferring the wet paper sheet on a wet paper stack beside the paper-fishing tank, applying proper pressure to the wet paper sheet by a squeezer, finally drying the paper to obtain the original book paper with the ration of 24g/m2。
The physical properties (including water absorption, tear index and tensile strength) of the book papers obtained in examples 1 to 3 and the book paper of comparative example 1 were respectively tested, and the water absorption of the book papers was tested according to GB/T461.1, and the water absorption time was 60 min; the tear index test of the book paper is tested according to GB/T455.1-1989, the tensile strength of the book paper is tested according to GB/T465.2, and the specific test results are shown in Table 1.
Table 1 comparative table of physical property test results of the book papers of examples 1 to 3 and comparative example 1
Claims (8)
1. A hydrophobic book paper is characterized in that: comprises bamboo fibers of the original book paper and hydrophobic modified nano-cellulose, and the weight of the hydrophobic original book paper is 24-30g/m2The water absorption is 12-15mm/60min, and the transverse tearing index is 18.5-20 mN.m2(iv) g, longitudinal tensile strength of 1.2-1.5 KN/m.
2. The hydrophobic book cover paper according to claim 1, characterized in that: the mass ratio of the bamboo fibers of the book paper to the hydrophobically modified nanocellulose is 1: 0.005-0.01.
3. The hydrophobic book cover paper according to claim 1, characterized in that: the hydrophobic modified nano-cellulose is prepared by the following method, comprising the following steps:
(1) diluting oxidized nano-cellulose into nano-cellulose water suspension with the concentration of 0.8-1.2%, and evaporating to obtain gel-like nano-cellulose; then uniformly mixing the gel-like nano cellulose with a dispersing agent N-N-dimethylformamide, and continuously stirring for 4-8h at a constant temperature of 80-85 ℃; adding n-heptanoic anhydride and 4-dimethylaminopyridine into the reaction system, dispersing at a high speed for 10-20min, heating to 100 ℃, continuing to react for 2-4h, cooling, and washing the product to obtain anhydride modified nano-cellulose;
(2) adding the acid anhydride modified nano-cellulose obtained in the step (1) into the acid anhydride modified nano-cellulose according to the mass ratio of 1: 1-2, uniformly mixing an n-undecamine solution and a tetradecylamine solution to obtain a mixed reaction solution, adjusting the pH value of the reaction solution to 7-8, and stirring and reacting at a constant temperature of 60-65 ℃ for 4-6 hours; and after the reaction is finished, centrifuging and washing the product, and finally performing dialysis treatment to obtain the hydrophobic modified nano-cellulose.
4. The hydrophobic book cover paper according to claim 3, characterized in that: the oxidized nano-cellulose in the step (1) is prepared by oxidizing a TEMPO/NaBr/NaCl system and carrying out high-pressure homogenization treatment on cotton pulp.
5. The hydrophobic book cover paper according to claim 3, characterized in that: the mass ratio of the nano-cellulose to the n-heptanoic anhydride to the 4-dimethylaminopyridine in the step (1) is 1: 30-50: 0.5-1.5.
6. The hydrophobic book cover paper according to claim 3, characterized in that: the concentration of the n-undecamide solution in the step (2) is 3-5%; the concentration of the tetradecylamine solution is 3-5%.
7. The hydrophobic book cover paper according to claim 3, characterized in that: the ratio of the mass of the anhydride modified nanocellulose in the step (2) to the mass sum of n-undecamine and tetradecylamine is 1: 0.4-0.7.
8. The method of making a hydrophobic book cover paper according to claim 1 or 2, characterized in that: the method comprises the following steps:
(a) cutting bamboo, soaking, boiling, washing, drying in the sun, beating, and blending into bamboo fiber suspension with concentration of 0.05-0.2% in a paper fishing tank;
(b) preparing hydrophobic modified nano-cellulose into dispersion liquid with the concentration of 2-5%, adding the dispersion liquid into the paper fishing groove in the step (a), putting the bamboo curtain into the paper fishing groove to lift up, uniformly spreading the fibers on the bamboo curtain, making wet paper sheets, pressing the wet paper sheets to dry, and finally drying to obtain the original book paper.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112327962A (en) * | 2020-10-19 | 2021-02-05 | 浙江大学 | Detection control circuit for intelligent metabook paper fermentation box |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047206A (en) * | 2013-03-12 | 2014-09-17 | 金东纸业（江苏）股份有限公司 | Method for improving slurry-made paper strength, and slurry and paper prepared by the method |
| US20150072581A1 (en) * | 2013-09-11 | 2015-03-12 | Empire Technology Development Llc | Nanocellulose Composites and Methods for their Preparation and Use |
| CN105780580A (en) * | 2016-05-05 | 2016-07-20 | 潘小英 | Bamboo paper making process |
-
2019
- 2019-11-05 CN CN201911068264.XA patent/CN111218848B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047206A (en) * | 2013-03-12 | 2014-09-17 | 金东纸业（江苏）股份有限公司 | Method for improving slurry-made paper strength, and slurry and paper prepared by the method |
| US20150072581A1 (en) * | 2013-09-11 | 2015-03-12 | Empire Technology Development Llc | Nanocellulose Composites and Methods for their Preparation and Use |
| CN105780580A (en) * | 2016-05-05 | 2016-07-20 | 潘小英 | Bamboo paper making process |
Non-Patent Citations (2)
| Title |
|---|
| 李静: "纳米纤维素的疏水改性及其在制浆造纸中的应用", 《中国优秀硕士学位论文全文库 工程科技Ⅰ辑》 * |
| 袁长龙等: "TEMPO氧化纳米纤维素的疏水改性", 《造纸科学与技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112327962A (en) * | 2020-10-19 | 2021-02-05 | 浙江大学 | Detection control circuit for intelligent metabook paper fermentation box |
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| CN111218848B (en) | 2022-02-22 |
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Denomination of invention: Hydrophobic Yuanshu Paper and Its Preparation Method Effective date of registration: 20221026 Granted publication date: 20220222 Pledgee: Zhejiang Fuyang Rural Commercial Bank Co.,Ltd. Chang'an Sub branch Pledgor: Hangzhou Fuyang Dazhuyuan Bamboo Paper Co.,Ltd. Registration number: Y2022980019750 |