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Preparation process for nano-scale chitosan and latex graft copolymer

A technology of graft copolymer and preparation process, applied in the field of preparation technology of nano-scale chitosan and latex graft copolymer, can solve the problems of high cost, short duration of antibacterial antibacterial, poor combination of antibacterial agent and latex, etc. , to achieve the effect of short cycle, long antibacterial efficacy and low price

Inactive Publication Date: 2011-05-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problems of only surface antibacterial treatment of latex, high cost, short antibacterial duration of the prepared antibacterial material, poor combination of antibacterial agent and latex, etc.

Method used

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  • Preparation process for nano-scale chitosan and latex graft copolymer
  • Preparation process for nano-scale chitosan and latex graft copolymer
  • Preparation process for nano-scale chitosan and latex graft copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 0.04g of chitosan in 20ml of 2% acetic acid solution, place on a magnetic stirrer and stir for 40 minutes; after standing for 5min to defoam, add 6.7mg of dispersant sodium polyphosphate until the solution is milky white; Sodium solution adjusts the pH of the solution to 5.0-6.0, and then adjusts the pH to 8.5-9.0 with ammonia water; filter the latex with a 400-mesh standard sieve. Take 10ml nano-sized chitosan, pass through N 2 , add 0.05g cerium ammonium nitrate (CAN) and 10ml latex in turn, adjust the pH to 9.0 with ammonia water, add cumene hydroperoxide solution, stir at room temperature at 400r / min, add tetraethylenepentamine dropwise, and react for 15h.

Embodiment 2

[0030] According to the processing method of embodiment 1, the difference of embodiment 2 is: the molar mass ratio of chitosan and latex is 1: 2, and the stirring speed is 200r / min.

Embodiment 3

[0032] According to the processing method of embodiment 1, the difference of embodiment 3 is: use potassium persulfate as initiator; the molar mass ratio of chitosan and latex is 1: 5.

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Abstract

The invention discloses a preparation method of nano-scaled chitosan-latex grafted copolymer, which comprises the steps as follows: dissolving chitosan into an acetic acid solution, stirring, standing for defoaming, adding sodium polyphosphate until the solution turns milk white, and adjusting the pH value with a sodium hydroxide solution and ammonia; and feeding the nanoscaled chitosan into N2, sequentially adding the initiator and the latex, adjusting the pH value, adding cumene hydroperoxide solution, stirring and adding tetraethylenepentamine dropwise for reacting. The synthesis process has the advantages of simple process and low cost. The obtained antibacterial material has excellent antibacterial property, and is applicable in medical field.

Description

technical field [0001] The invention relates to a preparation process of chitosan and latex composite antibacterial material, in particular to a preparation process of nanoscale chitosan and latex graft copolymer. Background technique [0002] Chitosan is the deacetylation product of chitin, which widely exists in nature and has been widely used in water treatment, medicine, food, agriculture, bioengineering, daily chemical industry, textile printing and dyeing, papermaking and tobacco and other fields. Due to its non-toxic and harmless, good cell affinity, tissue compatibility and biodegradability and other physiological effects such as anticoagulation, hemostasis, antibacterial and anti-inflammatory, chitosan has a wide range of applications and Prospects. [0003] The publication number is CN1986606 "Method for preparing chitosan-grafted-polylactic acid nanoparticles" invention patent. In this invention, chitosan-grafted-polylactic acid is added to tetrahydrofuran, and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F299/00C08B37/08A01P1/00
Inventor 许并社魏丽乔肖传实贾鹏侯莹张利于世平
Owner TAIYUAN UNIV OF TECH
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