A kind of preparation method of paper with antibacterial effect

A technology for paper and antibacterial drugs, applied in the field of paper preparation, can solve the problems of failure of antibacterial effect, loss, uneven distribution of antibacterial agents in antibacterial paper, etc., and achieve the effects of reducing production costs, reducing side effects, and overcoming the problem of loss of antibacterial drugs

Active Publication Date: 2016-03-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antibacterial paper prepared by the spraying method has the disadvantage of uneven distribution of antibacterial agents; the preparation of antibacterial paper by the dipping method takes too long and is not suitable for large-scale high-speed paper machine production; the antibacterial effect of the antibacterial paper prepared by the surface sizing and coating method will decrease In the process of deep processing, it will gradually fail with the change of storage time and humidity; although the preparation of antibacterial paper by the addition method in pulp is easy to operate, because the molecular weight of antibacterial drugs is generally small, it is easy to be lost with white water in the process of surfing the Internet, resulting in the amount of antibacterial drugs Too large, but the antibacterial components retained in the paper are very small, which not only increases the cost, but also fails to achieve a good antibacterial effect

Method used

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  • A kind of preparation method of paper with antibacterial effect
  • A kind of preparation method of paper with antibacterial effect
  • A kind of preparation method of paper with antibacterial effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) At room temperature, add 5g of β-cyclodextrin to 25ml of sodium hydroxide solution with a concentration of 300g / L, slowly add 1ml of epichlorohydrin solution, stir at 50°C for 20min, then add 2.5g of gelatinized replacement cationic starch with a density of 0.021, continue to stir for 2 hours, neutralize the solution with 1.5mol / L hydrochloric acid solution until it becomes neutral, add 50ml of ethanol solution, centrifuge at 5000r / min for 15min, freeze dry for 12h to obtain grafted cyclodextrin cationic starch

[0029] (2) Put 2 g of the prepared grafted cyclodextrin cationic starch in a mortar, add 4 g of deionized water to grind it evenly, add 200 mg of ciprofloxacin hydrochloride and then grind it for 20 min, then place it in a blast drying oven at 40 °C Drying in medium for 4h, followed by washing 3 times with deionized water, freeze-drying for 12h to obtain the grafted cyclodextrin cationic starch containing ciprofloxacin hydrochloride;

[0030] (3) Add 0%, 0....

Embodiment 2

[0034] (1) At room temperature, add 6g of β-cyclodextrin to 25ml of sodium hydroxide solution with a concentration of 400g / L, slowly add 2.42ml of epichlorohydrin solution, stir at 60°C for 30min, then add 2.5g of The final degree of substitution is 0.033 cationic starch, continue to stir for 3 hours, neutralize the solution with 1mol / L hydrochloric acid solution until it becomes neutral, add 50ml of ethanol solution, centrifuge at 4000r / min for 20min, freeze-dry for 12h to obtain grafted cyclodextrin cationic starch;

[0035] (2) Put 2 g of the prepared grafted cyclodextrin cationic starch in a mortar, add 6 g of water and grind it evenly, add 300 mg of levofloxacin hydrochloride and grind it thoroughly for 20 min, dry it in a blast drying oven at 50 °C for 3 h, and press Then wash 3 times with deionized water, and freeze-dry for 12h to obtain the grafted cyclodextrin cationic starch containing levofloxacin hydrochloride;

[0036] (3) Add 0%, 0.1%, 1%, and 2% of the grafted ...

Embodiment 3

[0041] (1) At room temperature, add 7.5g of β-cyclodextrin to 25ml of 400g / L sodium hydroxide solution, slowly add 2.42ml of epichlorohydrin solution, stir at 60°C for 20min, then add 2.5g of β-cyclodextrin The degree of substitution after melting is 0.043 cationic starch, continue to stir for 4 hours, neutralize the solution with 1.5mol / L hydrochloric acid solution until it becomes neutral, add 50ml of acetone solution, centrifuge at 5000r / min for 30min, freeze-dry for 12h to obtain the grafted ring Dextrin cationic starch;

[0042] (2) Put 2 g of the obtained grafted cyclodextrin cationic starch in a mortar, add 8 g of water and grind it evenly, add 400 mg of doxycycline hydrochloride, grind it thoroughly for 20 min, and dry it in a blast drying oven at 40 °C for 4 h , followed by washing with deionized water for 3 times, and freeze-drying for 12 hours to obtain the grafted cyclodextrin cationic starch containing doxycycline hydrochloride;

[0043](3) Add 0%, 0.1%, 1%, and ...

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Abstract

The invention discloses a preparation method of paper with an antibacterial effect. The preparation method comprises the following steps: grafting cyclodextrin to papermaking cationic starch by an epoxy crosslinking agent; enveloping antibacterial agents by means of lyophobic cavities of cyclodextrin on the cationic starch; and adding the antibacterial agents to paper by way of internal addition, so as to improve the strength performance of paper while paper is endowed with good antibacterial performance. According to the preparation method provided by the invention, the antibacterial agents are embedded by cyclodextrin, so that antibacterial functional paper products with slow release performance can be prepared. The retention rate of the antibacterial agents on fibers is improved by means of efficient retention rate of cationic starch on fibers, so that the antibacterial effect of paper is enhanced, and the preparation method has the advantages of simplicity in production process, low equipment investment and strong adaptability.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a method for preparing paper with antibacterial effect. Background technique [0002] With the improvement of living standards, people pay more attention to their own health and the safety of the surrounding environment, and hope that various materials and their products closely related to people's lives can have antibacterial properties. Paper is an indispensable daily necessities in people's life. Research and development of antibacterial functional paper is of great significance, especially for paper in the field of circulation, such as books, playing cards, medical records, recipes, banknote paper, etc. These papers or paper products are frequently exchanged, which easily brings about the chance of bacteria spreading or cross-infection. In addition, antibacterial paper has broad application prospects in food packaging paper, medical paper, indoor environmental protection paper, cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/36D21H21/06D21H17/29
Inventor 钱丽颖董超叶迎肖惠宁何北海
Owner SOUTH CHINA UNIV OF TECH
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