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Long-acting antibacterial polyester and preparation method thereof

A polyester and long-acting technology, which is applied in the field of long-acting antibacterial polyester and its preparation, can solve the problems of high cost, poor antibacterial durability, and poor washing resistance, and achieve high safety, stable performance, and easy processing.

Active Publication Date: 2019-01-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN 103571162A discloses a preparation method of antibacterial PET material, which uses composite oxide nano-CuFe 2 o 4 Prepare antibacterial agent as the carrier of silver, and this antibacterial agent and PET matrix are blended and extruded to obtain the antibacterial PET material with antibacterial effect, in the above-mentioned preparation method, silver ion is as the cost of antibacterial agent higher, and secondly silver ion is exposed to light, heated It is very easy to reduce under the condition, and there are safety hazards such as heavy metal toxicity in this metal ion antibacterial agent, which limits its use; Document 1 "Development of Antibacterial Polyester Chips and Fibers [J]. Synthetic Fiber Industry, 2000, 23 (2) :20-23. "reported a kind of antibacterial polyester that takes zeolite as the carrier to make by antibacterial metal ion exchange reaction, and tested the antibacterial effect of modified polyester, this antibacterial polyester its bacteriostasis after 30 times of washing The rate (Staphylococcus aureus and Escherichia coli) has dropped by 7 percentage points, and the washing resistance is poor; Document 2 "In vitro antibacterial effect of nanometer silver-loaded resin substrate [J]. Journal of Practical Stomatology, 2005, 21 (5) : 670-672. "reported a kind of nano silver-loaded resin matrix, its bacteriostatic rate to Streptococcus mutans is 99%, the bacteriostatic rate to Candida albicans is 91%, with light intensity > 70μW / cm 2 After 8 hours of ultraviolet irradiation, the antibacterial rate decreased by 1 percentage point, and the antibacterial persistence was poor.

Method used

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  • Long-acting antibacterial polyester and preparation method thereof
  • Long-acting antibacterial polyester and preparation method thereof
  • Long-acting antibacterial polyester and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A kind of preparation method of long-acting antibacterial polyester, concrete steps are as follows:

[0034] (1) p-hydroxybenzoic acid and polyethylene terephthalate (PET) are dried, the water content of the dried p-hydroxybenzoic acid is 20ppm, and the water content of the dried PET is 20ppm, wherein the water content of PET The structural formula is as follows:

[0035]

[0036] In the formula, R 1 for x=2;R 2 for n=100~120; the number average molecular weight is 16000, and the content of terminal carboxyl group is 30.0mmol / t;

[0037] (2) P-hydroxybenzoic acid is added in PET melt and carries out reactive blending and makes long-acting antibacterial polyester, and reactive blending refers to the blending process that esterification takes place, and when reactive blending starts, to The mass ratio of hydroxybenzoic acid to PET was 13:1000, the temperature of reactive blending was 270°C, the pressure was -0.05MPa, and the time was 30min.

[0038] Finally, the...

Embodiment 2

[0042] A kind of preparation method of long-acting antibacterial polyester, concrete steps are as follows:

[0043] (1) Methyl p-hydroxybenzoate and polytrimethylene terephthalate (PTT) are dried, the water content of the dried methyl p-hydroxybenzoate is 30ppm, and the water content of the dried PTT is 30ppm, wherein The structural formula of PTT is as follows:

[0044]

[0045] In the formula, R 1 for Among them, x=3; R 2 for n=100~120; the number average molecular weight is 11000, and the content of terminal carboxyl group is 29.4mmol / t;

[0046] (2) After blending methyl p-hydroxybenzoate and PTT slices, melt and carry out reactive blending to obtain long-acting antibacterial polyester. Reactive blending refers to the blending process in which esterification occurs. Reactive blending begins , the mass ratio of methyl p-hydroxybenzoate to PTT was 15:1000, the temperature of reactive blending was 230°C, the pressure was -0.05MPa, and the time was 25min.

[0047] F...

Embodiment 3

[0051] A kind of preparation method of long-acting antibacterial polyester, concrete steps are as follows:

[0052] (1) Ethyl p-hydroxybenzoate and polybutylene terephthalate (PBT) are dried, the water content of the dried ethyl p-hydroxybenzoate is 20ppm, and the water content of the dried PBT is 20ppm , wherein the structural formula of PBT is as follows:

[0053]

[0054] In the formula, R 1 for Among them, x=4; R 2 for n=80~100; the number average molecular weight is 15000, and the content of terminal carboxyl group is 29.8mmol / t;

[0055] (2) Ethyl p-hydroxybenzoate is added to the PBT melt for reactive blending to obtain long-acting antibacterial polyester. Reactive blending refers to the blending process in which transesterification occurs. When reactive blending begins , the mass ratio of ethyl p-hydroxybenzoate to PBT was 17:1000, the temperature of reactive blending was 275°C, the pressure was -0.05MPa, and the time was 29min.

[0056] Finally, the ester g...

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Abstract

The invention relates to long-acting antibacterial polyester and a preparation method thereof. According to the invention, an antibacterial agent and polyester are reactively mixed in a molten state to obtain the long-acting antibacterial polyester, wherein the structural formula of the polyester is as shown in the specification. In the formula, R1 and R2 are aromatic rings, cyclic hydrocarbons oraliphatic hydrocarbons; and n= 80-180. The molecular structure of the prepared long-acting antibacterial polyester contains both a polyester segment and an antibacterial terminal group, wherein the antibacterial terminal group is a group formed after a reaction of the antibacterial agent. The antibacterial agent is hydroxybenzoic acid and / or hydroxybenzoate. The 24-hour inhibition rate of Staphylococcus aureus and Escherichia coli by the antibacterial agent is greater than or equal to 99%, the 24-hour inhibition rate of Staphylococcus aureus and Escherichia coli is greater than 95% after 50 times of washing, and the 24-hour inhibition rate of Staphylococcus aureus and Escherichia coli is greater than 98% after 12 hours of irradiation by ultraviolet rays of 70 muW / cm<2>. The preparation method is simple and low-cost; and the prepared polyester has good quality and good antibacterial property, and has a considerable application prospect.

Description

technical field [0001] The invention belongs to the field of antibacterial polymer materials, and in particular relates to a long-acting antibacterial polyester and a preparation method thereof. Background technique [0002] With the improvement of people's quality of life, people pay more and more attention to creating and maintaining a healthy and hygienic living environment, and the demand for antibacterial materials in the fields of medical hygiene and food hygiene is also increasing. [0003] Polyester refers to a polymer obtained by polycondensation of polyhydric alcohol and polycarboxylic acid, common ones are polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyarylate (PAR), etc. Products made of PET have the advantages of high strength and modulus, good elasticity, good wear resistance and impact resistance, and good creep resistance under load. They are used in chemical fiber, packaging, Electronic appliances, medical and health care, construct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91
CPCC08G63/916
Inventor 程筒邹家熊姬洪吴开建冯德军张玉梅王华平
Owner DONGHUA UNIV
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