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TiO2@Ag/PVC (Poly Vinyl Chloride) composite antibacterial film and preparation method thereof

A PVC resin and film technology, applied in the direction of titanium oxide/hydroxide, rayon chemical post-treatment, fiber chemical characteristics, etc., can solve the problems of antibacterial performance, high production finished product, low material stability, etc., to achieve high efficiency antibacterial Bacterial performance, low production cost, broad-spectrum and long-lasting bactericidal properties

Inactive Publication Date: 2013-05-15
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the reported nano-silver antibacterial materials are attached to the surface of the material by post-finishing methods. The stability of the material is not high. It is also easy to oxidize to form silver oxide, and the antibacterial performance will inevitably be affected

Method used

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  • TiO2@Ag/PVC (Poly Vinyl Chloride) composite antibacterial film and preparation method thereof
  • TiO2@Ag/PVC (Poly Vinyl Chloride) composite antibacterial film and preparation method thereof
  • TiO2@Ag/PVC (Poly Vinyl Chloride) composite antibacterial film and preparation method thereof

Examples

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preparation example Construction

[0017] TiO of the present invention 2 The preparation method of Ag / PVC composite bacteriostatic plastic film, concrete steps are as follows:

[0018] 1. Synthesis of TiO 2 Nanofibers

[0019] Add 1.0-1.5g of titanium dioxide powder (Degussa P25) and 120ml of 8-12 mol / L KOH aqueous solution into a high-pressure reactor equipped with a polytetrafluoroethylene liner. Between 140 and 170 o C for 30-40 hours, cooled naturally to room temperature, collected the white precipitate, washed with distilled water until neutral, and obtained hydrogen titanate nanofibers. o TiO can be obtained after high temperature sintering at C for 1~3h 2 Nanofibers.

[0020] 2. Synthesis of TiO 2 Ag nanocomposite fiber

[0021] Weigh 0.5~0.7gTiO 2 Nanofibers dispersed in 100 mL of water, at 65-75 o Add it into 100mL of silver ammonia solution with a concentration of 0.15-0.3 mol / L under the condition of C, stir for 1h, then add 50mL with a concentration of 3.0×10 -4 ~8.0×10 -4 mol / L aqueous ...

Embodiment 1

[0031]Weigh 1.2g of titanium dioxide powder and dissolve it in 120mL of KOH aqueous solution with a concentration of 10mol / L, at 150 o Centrifuge after reacting for 30 hours at C, wash it with clear water, and then add it to 100 mL of silver nitrate solution with a concentration of 0.2 mol / L, 70 o C under magnetic stirring for 1h, then add 50mL concentration of 5.0×10 -4 mol / L PVP solution maintained at 70 o C continued to react for 8h, and the product obtained TiO after centrifugal washing 2 Ag nanofibers.

[0032] Then, weigh 0.5g of the obtained TiO 2 Ag nanofibers were dissolved in 100mL of γ-(2,3-glycidoxy)propyltrimethoxysilane (KH-560) toluene solution with a concentration of 0.1mol / L, and the modified TiO was obtained after reflux for 30min. 2 Ag nanofibers. Weigh the modified TiO according to the mass ratio of 1:47:30:0.32:1.6 2 Ag nanofiber, polyvinyl chloride resin, synthetic vegetable ester, calcium stearate and barium-zinc composite stabilizer, mixed evenly...

Embodiment 2

[0041] According to the method described in Example 1, TiO2Ag / PVC composite antibacterial film is prepared, and the modified TiO 2 The mass ratio of Ag nanofibers, polyvinyl chloride resin, bis(2-ethylhexyl) phthalate, glyceryl stearate and calcium-zinc composite stabilizer was adjusted to 1:15:9:0.12:0.53, Other conditions remain unchanged, modified TiO 2 Ag composite nanofibers occupy TiO 2 The mass fraction of the Ag / PVC composite antibacterial film is 3.9%, and the pH value is 8.0 under light conditions. 2 The antibacterial rate of Ag / PVC composite antibacterial film is 98.5%.

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Abstract

The invention discloses a TiO2@Ag / PVC (Poly Vinyl Chloride) composite antibacterial film and a preparation method thereof. The method comprises the following steps: after carrying out a surface modification on a TiO2@Ag nanofiber heterostructure by utilizing a silane coupling agent, evenly mixing the TiO2@Ag nanofiber heterostructure with the PVC, a plasticizer, a lubricating agent, a compound stabilizer and the like; and then carrying out a molten film blowing process, thereby obtaining the TiO2@Ag / PVC composite antibacterial film, wherein the modified TiO2@Ag has a structure containing nanosilver particles evenly attached to the surfaces of TiO2 nanofibers. By utilizing the cooperative actions of the two components of the TiO2@Ag heterostructure, a large number of bacteria and viruses attached to the surface of the film of the heterostructure can be killed in a short time under the light irradiation, and the majority of toxic compounds can be degraded. The TiO2@Ag / PVC composite antibacterial film is simple and convenient to process, long-acting, broad-spectrum in antibacterial effect, safe and nontoxic and suitable for various PVC plastic products.

Description

technical field [0001] The invention relates to an antibacterial film, in particular to a TiO 2 Ag / PVC composite antibacterial film and preparation method thereof. Background technique [0002] As an important general-purpose resin, polyvinyl chloride (PVC) accounts for 29% of the world's total synthetic resin consumption, and is mainly used in the production of plastic products such as films, artificial leather, plates, doors and windows, pipes and valves that are closely related to people's daily life . With the development of society, people's awareness of self-care is constantly increasing, and higher requirements are put forward for the materials used in life in terms of safety, sanitation and environmental protection. attention. [0003] Nano-silver is a common broad-spectrum bactericidal material, which has a good killing effect on bacteria, fungi, mold, etc., and at the same time has the characteristics of long-term, safe, and non-toxic side effects. It has been u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/06C08K9/02C08K7/08D01F9/08D01F11/00D06M13/513C01G23/08
Inventor 董文钧朱彦军何心友
Owner ZHEJIANG SCI-TECH UNIV
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