Mineral-containing plant fiber Tibetan paper and preparation process thereof

Abstract

The invention relates to the field of Tibetan paper, in particular to mineral-containing plant fiber Tibetan paper and a preparation process thereof. A radix euphorbiae lantu root system is used as a fiber raw material, and chitosan modified talc and calcium chloride are added into paper pulp. A traditional Tibetan paper manufacturing technology is combined with a modern technology, and after chitosan modified talc and calcium chloride are added into paper pulp, the strength of the paper is improved, and meanwhile, the aging resistance is also improved. By compounding chitosan on the surface of talc, hydrogen bonds can be formed among paper pulp fibers, and the combination between talc and fibers is improved, so that the tensile strength of paper prepared from the modified talc powder is remarkably improved compared with that of paper filled with pure talc powder. Meanwhile, due to the existence of calcium chloride, more chitosan modified talc can be adsorbed on fibers, and the aging resistance of the paper is improved.

Description

Technical Field

[0001] The present invention relates to the field of Tibetan paper, and in particular to a plant fiber Tibetan paper containing minerals and a preparation process thereof. Background Art

[0002] Tibetan paper is a kind of handmade paper with unique ethnic characteristics. Its main raw material is the phloem fiber of the root of Stellera chamaejasme widely distributed in the Tibetan area, and it is made by the traditional paper casting method. The technological process of the paper casting method is as follows: material collection, cleaning, pounding, peeling, tearing, boiling, beating, pulping, casting, drying and paper peeling, etc. Tibetan paper was born on the snowy plateau and is a treasure of Tibetan culture. Because Stellera chamaejasme itself has certain toxicity, the scriptures, government official documents and archives carried by Tibetan paper have excellent durability, are not afraid of being eaten by insects or mice, and are not easy to rot or discolor, so they are loved by many calligraphers and collectors.

[0003] However, the main raw material of Tibetan paper is the phloem fiber of the root of Stellera chamaejasme, its cellulose content is relatively low, and the Stellera chamaejasme fiber is relatively short and thin, which makes the interweaving and bonding force between the fibers weak, thus reducing the mechanical strength of the paper. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a plant fiber Tibetan paper containing minerals and a preparation process thereof.

[0005] The present invention is realized by the following technical solutions:

[0006] A plant fiber Tibetan paper containing minerals, with the root system of Stellera chamaejasme as the fiber raw material, and chitosan-modified talc and calcium chloride are added to the pulp.

[0007] Further, the mass ratio of pulp, chitosan-modified talc and calcium chloride in the pulp is 100:1-5:0.5.

[0008] Further, the mass ratio of pulp, chitosan-modified talc and calcium chloride in the pulp is 100:3-5:0.5.

[0009] Further, the mass ratio of pulp, chitosan-modified talc and calcium chloride in the pulp is 100:3:0.5.

[0010] Further, the preparation method of the chitosan-modified talc is as follows:

[0011] Step S11: Disperse talc into deionized water;

[0012] Step S12: Take chitosan and disperse it into acetic acid water, the volume ratio of acetic acid to water in the acetic acid water is 5:95, and then stir for 20 min;

[0013] Step S13: The products of step S1 and step S2 are mixed together, the pH is adjusted to 10 with sodium hydroxide, and then stirred for 10 minutes, filtered to obtain a precipitate, and the precipitate is vacuum dried at 50°C.

[0014] Furthermore, the mass ratio of the talc in step S11 to the chitosan in step S12 is 5 to 0.5.

[0015] The present invention also provides a process for preparing mineral-containing plant fiber Tibetan paper, comprising the following steps:

[0016] Step S1: Take the roots of wolfsbane, soak them in water for 1 day, remove the soil, and then smash the roots of wolfsbane with a hammer, take out the fiber tissue between the outer skin and the inner stem, and completely dry them in the sun;

[0017] Step S2: heating the fibrous tissue obtained in step S1 and sodium carbonate in water, stirring while heating, heating to boiling, and maintaining a slightly boiling state for 2 hours without adding water;

[0018] Step S3: Take out the product of step S2, squeeze out the water, and beat for 1 hour;

[0019] Step S4: adding water to the product of step S3 and stirring to make the pulp evenly suspended;

[0020] Step S5: the pulp obtained in step S4, chitosan-modified talc and anhydrous calcium chloride are mixed evenly, and a proper amount is poured into a paper curtain, and then the paper curtain is slowly placed in a clean flowing water pool so that the pulp is evenly distributed in the paper curtain, and then the paper curtain is slowly lifted to drain the water;

[0021] Step S6: airing the paper curtain, and peeling off the paper before it is completely dried to hide the paper.

[0022] Furthermore, in step S2, the mass ratio of the fibrous tissue to sodium carbonate is 2.5:0.1.

[0023] Furthermore, the Tibetan paper is used in the fields of writing, painting and tie-dyeing.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] The invention combines traditional Tibetan paper making techniques with modern technology. After chitosan-modified talc and calcium chloride are added to paper pulp, the strength of the paper is improved, and the aging resistance is also improved. Chitosan can be compounded on the surface of talc to form hydrogen bonds between pulp fibers, thereby improving the bonding between talc and fibers, so that the tensile strength of paper prepared using modified talc is significantly improved compared to pure talc-filled paper. At the same time, the presence of calcium chloride can make the chitosan-modified talc adsorb more on the fibers, thereby improving the aging resistance of the paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the SEM image of chitosan-modified talc in the embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments. The illustrative embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0028] Example 1

[0029] A preparation process of mineral-containing plant fiber Tibetan paper

[0030] Step S1: Take the roots of wolfsbane, soak them in water for 1 day, remove the soil, and then smash the roots of wolfsbane with a hammer, take out the fiber tissue between the outer skin and the inner stem, and completely dry them in the sun;

[0031] Step S2: 2.5 kg of the fibrous tissue obtained in step S1 and 0.1 kg of sodium carbonate are heated with 2.5 kg of water while stirring, and after heating to boiling, the mixture is kept at a slight boiling state for 2 hours without adding any water;

[0032] Step S3: Take out the product of step S2, squeeze out the water, and beat for 1 hour;

[0033] Step S4: adding water to the product of step S3 and stirring to make the pulp evenly suspended;

[0034] Step S5: Mix the pulp obtained in step S4, chitosan-modified talc and anhydrous calcium chloride in a mass ratio of 100:1:0.5, and pour an appropriate amount into the paper curtain. Figure 1 This is the SEM image of chitosan-modified talc. Then slowly put the paper curtain into a clean flowing water pool so that the pulp is evenly distributed in the paper curtain, and then slowly lift the paper curtain to drain the water;

[0035] Step S6: airing the paper curtain, and peeling off the paper before it is completely dried to hide the paper.

[0036] The preparation method of the chitosan modified talc is as follows:

[0037] Step S11: dispersing 5 g of talc into 50 mL of deionized water;

[0038] Step S12: taking 0.5 g of chitosan and dispersing it into 50 mL of acetic acid water, wherein the volume ratio of acetic acid to water in the acetic acid water is 5:95, and then stirring for 20 min;

[0039] Step S13: The products of step S1 and step S2 are mixed together, the pH is adjusted to 10 with sodium hydroxide, and then stirred for 10 minutes, filtered to obtain a precipitate, and the precipitate is vacuum dried at 50°C.

[0040] Example 2

[0041] A preparation process of mineral-containing plant fiber Tibetan paper

[0042] Step S1: Take the roots of wolfsbane, soak them in water for 1 day, remove the soil, and then smash the roots of wolfsbane with a hammer, take out the fiber tissue between the outer skin and the inner stem, and completely dry them in the sun;

[0043] Step S2: 2.5 kg of the fibrous tissue obtained in step S1 and 0.1 kg of sodium carbonate are heated with 2.5 kg of water while stirring, and after heating to boiling, the mixture is kept at a slight boiling state for 2 hours without adding any water;

[0044] Step S3: Take out the product of step S2, squeeze out the water, and beat for 1 hour;

[0045] Step S4: adding water to the product of step S3 and stirring to make the pulp evenly suspended;

[0046] Step S5: the pulp obtained in step S4, chitosan-modified talc and anhydrous calcium chloride are mixed evenly in a mass ratio of 100:2:0.5, and a proper amount is poured into a paper curtain, and then the paper curtain is slowly placed in a clean flowing water pool so that the pulp is evenly distributed in the paper curtain, and then the paper curtain is slowly lifted to drain the water;

[0047] Step S6: airing the paper curtain, and peeling off the paper before it is completely dried to hide the paper.

[0048] The preparation method of the chitosan-modified talc is the same as that of Example 1.

[0049] Example 3

[0050] A preparation process of mineral-containing plant fiber Tibetan paper

[0051] Step S1: Take the roots of wolfsbane, soak them in water for 1 day, remove the soil, and then smash the roots of wolfsbane with a hammer, take out the fiber tissue between the outer skin and the inner stem, and completely dry them in the sun;

[0052] Step S2: 2.5 kg of the fibrous tissue obtained in step S1 and 0.1 kg of sodium carbonate are heated with 2.5 kg of water while stirring, and after heating to boiling, the mixture is kept at a slight boiling state for 2 hours without adding any water;

[0053] Step S3: Take out the product of step S2, squeeze out the water, and beat for 1 hour;

[0054] Step S4: adding water to the product of step S3 and stirring to make the pulp evenly suspended;

[0055] Step S5: the pulp obtained in step S4, chitosan-modified talc and anhydrous calcium chloride are mixed evenly in a mass ratio of 100:3:0.5, and a proper amount is poured into a paper curtain, and then the paper curtain is slowly placed in a clean flowing water pool so that the pulp is evenly distributed in the paper curtain, and then the paper curtain is slowly lifted to drain the water;

[0056] Step S6: airing the paper curtain, and peeling off the paper before it is completely dried to hide the paper.

[0057] The preparation method of the chitosan-modified talc is the same as that of Example 1.

[0058] Example 4

[0059] A preparation process of mineral-containing plant fiber Tibetan paper

[0060] Step S1: Take the roots of Wolfberry chamaejasme, soak them in water for 1 day, remove the soil, and then smash the roots of Wolfberry chamaejasme with a hammer, take out the fiber tissue between the outer skin and the inner stem, and completely dry them in the sun;

[0061] Step S2: 2.5 kg of the fibrous tissue obtained in step S1 and 0.1 kg of sodium carbonate are heated with 2.5 kg of water, and the mixture is stirred while heated until boiling, and then maintained at a slight boiling state for 2 hours without adding any water;

[0062] Step S3: Take out the product of step S2, squeeze out the water, and beat for 1 hour;

[0063] Step S4: adding water to the product of step S3 and stirring to make the pulp evenly suspended;

[0064] Step S5: the pulp obtained in step S4, chitosan-modified talc and anhydrous calcium chloride are mixed evenly in a mass ratio of 100:4:0.5, and a proper amount is poured into a paper curtain, and then the paper curtain is slowly placed in a clean flowing water pool so that the pulp is evenly distributed in the paper curtain, and then the paper curtain is slowly lifted to drain the water;

[0065] Step S6: airing the paper curtain, and peeling off the paper before it is completely dried to hide the paper.

[0066] The preparation method of the chitosan-modified talc is the same as that of Example 1.

[0067] Example 5

[0068] A preparation process of mineral-containing plant fiber Tibetan paper

[0069] Step S1: Take the roots of wolfsbane, soak them in water for 1 day, remove the soil, and then smash the roots of wolfsbane with a hammer, take out the fiber tissue between the outer skin and the inner stem, and completely dry them in the sun;

[0070] Step S2: 2.5 kg of the fibrous tissue obtained in step S1 and 0.1 kg of sodium carbonate are heated with 2.5 kg of water while stirring, and after heating to boiling, the mixture is kept at a slight boiling state for 2 hours without adding any water;

[0071] Step S3: Take out the product of step S2, squeeze out the water, and beat for 1 hour;

[0072] Step S4: adding water to the product of step S3 and stirring to make the pulp evenly suspended;

[0073] Step S5: the pulp obtained in step S4, chitosan-modified talc and anhydrous calcium chloride are mixed evenly in a mass ratio of 100:5:0.5, and a proper amount is poured into a paper curtain, and then the paper curtain is slowly placed in a clean flowing water pool so that the pulp is evenly distributed in the paper curtain, and then the paper curtain is slowly lifted to drain the water;

[0074] Step S6: airing the paper curtain, and peeling off the paper before it is completely dried to hide the paper.

[0075] The preparation method of the chitosan-modified talc is the same as that of Example 1.

[0076] Comparative Example 1

[0077] A preparation process of mineral-containing plant fiber Tibetan paper

[0078] Step S1: Take the roots of wolfsbane, soak them in water for 1 day, remove the soil, and then smash the roots of wolfsbane with a hammer, take out the fiber tissue between the outer skin and the inner stem, and completely dry them in the sun;

[0079] Step S2: 2.5 kg of the fibrous tissue obtained in step S1 and 0.1 kg of sodium carbonate are heated with 2.5 kg of water while stirring, and after heating to boiling, the mixture is kept at a slight boiling state for 2 hours without adding any water;

[0080] Step S3: Take out the product of step S2, squeeze out the water, and beat for 1 hour;

[0081] Step S4: adding water to the product of step S3 and stirring to make the pulp evenly suspended;

[0082] Step S5: Pour an appropriate amount of the pulp obtained in step S4 into a paper curtain, then slowly place the paper curtain into a clean flowing water pool so that the pulp is evenly distributed in the paper curtain, and then slowly lift the paper curtain to drain the water;

[0083] Step S6: Air-dry the paper curtain, and remove the paper before it is completely dry to obtain the Tibetan paper.

[0084] Comparative Example 2

[0085] Preparation process of a plant fiber Tibetan paper containing minerals

[0086] Step S1: Take the roots of Stellera chamaejasme, soak them in water for 1 day to remove the soil, then crush the roots of Stellera chamaejasme with a hammer, and take out the fiber tissue between the outer skin and the inner stem and dry it completely;

[0087] Step S2: Take 2.5 kg of the fiber tissue obtained in Step S1, 0.1 kg of sodium carbonate and 2.5 kg of water and heat them, stirring while heating. After heating to boiling, keep it in a slightly boiling state for 2 h, and no more water is added during this period;

[0088] Step S3: Fish out the product of Step S2, squeeze out the water, and beat it for 1 h;

[0089] Step S4: Add water to the product of Step S3 and stir to make the pulp suspension uniform;

[0090] Step S5: Mix the pulp obtained in Step S4 and talc in a mass ratio of 100:3 evenly, take an appropriate amount and pour it into the paper curtain, then slowly put the paper curtain into a clean and flowing pool of water so that the pulp is evenly distributed in the paper curtain, and then slowly lift the paper curtain to drain the water;

[0091] Step S6: Air-dry the paper curtain, and remove the paper before it is completely dry to obtain the Tibetan paper.

[0092] Comparative Example 3

[0093] Preparation process of a plant fiber Tibetan paper containing minerals

[0094] Step S1: Take the roots of Stellera chamaejasme, soak them in water for 1 day to remove the soil, then crush the roots of Stellera chamaejasme with a hammer, and take out the fiber tissue between the outer skin and the inner stem and dry it completely;

[0095] Step S2: Take 2.5 kg of the fiber tissue obtained in Step S1, 0.1 kg of sodium carbonate and 2.5 kg of water and heat them, stirring while heating. After heating to boiling, keep it in a slightly boiling state for 2 h, and no more water is added during this period;

[0096] Step S3: Fish out the product of Step S2, squeeze out the water, and beat it for 1 h;

[0097] Step S4: Add water to the product of Step S3 and stir to make the pulp suspension uniform;

[0098] Step S5: the pulp obtained in step S4 and chitosan-modified talc are mixed evenly in a mass ratio of 100:3, and a proper amount is poured into a paper curtain, and then the paper curtain is slowly placed in a clean flowing water pool so that the pulp is evenly distributed in the paper curtain, and then the paper curtain is slowly lifted to drain the water;

[0099] Step S6: airing the paper curtain, and peeling off the paper before it is completely dried to hide the paper.

[0100] The preparation method of the chitosan-modified talc is the same as that of Example 1.

[0101] Test Case

[0102] The tensile strength and aging tensile strength of the Tibetan paper prepared in each embodiment and resistance test were measured. The tensile strength test method was determined using GB / T453-2002, with a pre-tension of 9.8N during measurement, and the initial tensile strength was measured. The aging tensile strength was measured by placing the paper in a 105 degree Celsius oven for 72 hours.

[0103] Table 1

[0104]

[0105]

[0106] As can be seen from Table 1, in Examples 1 to 5, when chitosan-modified talc and calcium chloride are added to the pulp, the strength of the paper is improved, and the aging resistance is also improved. By compounding chitosan on the surface of talc, hydrogen bonds can be formed between pulp fibers, improving the bonding between talc and fibers, so that the tensile strength of paper prepared using modified talc is significantly improved compared to pure talc-filled paper. At the same time, the presence of calcium chloride can make chitosan-modified talc adsorb more on the fibers, improving the aging resistance of the paper.

[0107] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mineral-containing plant fiber Tibetan paper, characterized in that: The root system of wolfberry is used as the fiber raw material, and chitosan-modified talc and calcium chloride are added into the pulp.

2. The mineral-containing plant fiber Tibetan paper according to claim 1, characterized in that: The mass ratio of the pulp, chitosan-modified talc and calcium chloride in the pulp is 100:1 to 5:0.

5.

3. The mineral-containing plant fiber Tibetan paper according to claim 2, characterized in that: The mass ratio of the pulp, chitosan-modified talc and calcium chloride in the pulp is 100:3-5:0.

5.

4. The mineral-containing plant fiber Tibetan paper according to claim 3, characterized in that: The mass ratio of the pulp, chitosan-modified talc and calcium chloride in the pulp is 100:3:0.

5.

5. The mineral-containing plant fiber Tibetan paper according to any one of claims 1 to 4, characterized in that: The preparation method of the chitosan modified talc is: Step S11: dispersing talc in deionized water; Step S12: dispersing chitosan into acetic acid water, wherein the volume ratio of acetic acid to water in the acetic acid water is 5:95, and then stirring for 20 minutes; Step S13: The products of step S1 and step S2 are mixed together, the pH is adjusted to 10 with sodium hydroxide, and then stirred for 10 minutes, filtered to obtain a precipitate, and the precipitate is vacuum dried at 50°C.

6. The mineral-containing plant fiber Tibetan paper according to claim 5, characterized in that: The mass ratio of the talc in step S11 to the chitosan in step S12 is 5 to 0.

5.

7. A process for preparing mineral-containing plant fiber Tibetan paper according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step S1: Take the roots of wolfsbane, soak them in water for 1 day, remove the soil, and then smash the roots of wolfsbane with a hammer, take out the fiber tissue between the outer skin and the inner stem, and completely dry them in the sun; Step S2: 2.5 kg of the fibrous tissue obtained in step S1 and 0.1 kg of sodium carbonate are heated with 2.5 kg of water while stirring, and after heating to boiling, the mixture is kept at a slight boiling state for 2 hours without adding any water; Step S3: Take out the product of step S2, squeeze out the water, and beat for 1 hour; Step S4: adding water to the product of step S3 and stirring to make the pulp evenly suspended; Step S5: the pulp obtained in step S4, chitosan-modified talc and anhydrous calcium chloride are mixed evenly, and a proper amount is poured into a paper curtain, and then the paper curtain is slowly placed in a clean flowing water pool so that the pulp is evenly distributed in the paper curtain, and then the paper curtain is slowly lifted to drain the water; Step S6: airing the paper curtain, and peeling off the paper before it is completely dried to hide the paper.

8. The process for preparing the mineral-containing plant fiber Tibetan paper as claimed in claim 7, characterized in that: In step S2, the mass ratio of the fibrous tissue to the sodium carbonate is 2.5:0.

1.

9. The mineral-containing plant fiber Tibetan paper according to any one of claims 1 to 4, characterized in that: Used in writing, painting, and tie-dyeing.

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