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Macromolecule/modified organic montmorillonite laser marking material, and preparation method and antibacterial application thereof

A technology of organic montmorillonite and laser marking, applied in the field of new polymer materials, to achieve the effect of environmental protection application, low cost and wide source

Active Publication Date: 2020-09-29
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After laser treatment on the surface of the composite material, compared with before the laser treatment, nano-antibacterial zinc oxide particles are exposed on the surface of the material to achieve antibacterial effect. At present, there is no use of the antibacterial properties of nano-zinc oxide and the porous hydrophobic structure after laser treatment to make the material Surfaces with excellent antimicrobial properties reported

Method used

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  • Macromolecule/modified organic montmorillonite laser marking material, and preparation method and antibacterial application thereof
  • Macromolecule/modified organic montmorillonite laser marking material, and preparation method and antibacterial application thereof
  • Macromolecule/modified organic montmorillonite laser marking material, and preparation method and antibacterial application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of polymer / modified organic montmorillonite composites:

[0036](1) Take 54mL of methanol and 6mL of water in a 100mL flask and stir evenly, then add tetrabutyl titanate coupling agent respectively, the concentration is 1-4vol.%), then adjust the pH to 5.5 with glacial acetic acid, Heat in an oil bath at 56°C, react at a constant temperature for 1.5h, then raise the temperature to 85°C, add 1g of montmorillonite (sodium-based montmorillonite, particle size range 10-50nm), stir and react at a constant temperature for 2h, wash with methanol, filter with suction, Dry at 60°C to obtain a coupling agent-modified montmorillonite;

[0037] Use surfactant to modify montmorillonite, add 1g of coupling agent modified montmorillonite to 100mL round bottom flask, add 25mL water to stir and disperse evenly, slowly add cetyl trimethyl bromide at 70℃ Ammonium CTAB surfactant with a concentration of 7.5 mg / mL was reacted for 6 hours, washed with ethanol and water until no ...

Embodiment 2

[0045] Compared with Example 1, the difference between Example 2 is that nano zinc oxide particles are added therein.

[0046] Preparation of polymer / modified organic montmorillonite / zinc oxide composite:

[0047] (1) The preparation of organically modified montmorillonite, the difference is that the silane coupling agent KH550 is used, and the others are the same as in Example 1;

[0048] (2) 35 parts of organically modified montmorillonite, 20 parts of antibacterial nano-zinc oxide (ZnO, 10nm), 45 parts of polystyrene and 0.5 part of antioxidant, using a torque rheometer for blending operation, the setting temperature is 200°C, the rotation speed is 30r / min, and the blending time is 6min, so that the modified montmorillonite, nano-zinc oxide, antioxidant and polystyrene are fully melted and uniform, and then tableted and granulated to obtain laser masterbatch.

[0049] (3) Polymer / modified organic montmorillonite / zinc oxide composite material was prepared by melt blending m...

Embodiment 3

[0060] Preparation of polymer / modified organic montmorillonite / zinc oxide composite:

[0061] (1) The preparation of organically modified montmorillonite, the difference is that the silane coupling agent KH560 is used, and the others are the same as in Example 1;

[0062] (2) 35 parts of organically modified montmorillonite, 20 parts of antibacterial nano zinc oxide (ZnO, 15nm), 45 parts of polystyrene and 0.5 part of antioxidant, use torque rheometer to carry out blending operation, set temperature as 205°C, the rotation speed is 35r / min, and the blending time is 5min, so that the modified montmorillonite, nano-zinc oxide, antioxidant and polystyrene are fully melted and uniform, and then tableted and granulated.

[0063] (3) Prepare polymer / modified organic montmorillonite / zinc oxide composite material by melt blending method, 100 parts of high-density polyethylene, 1 part of masterbatch with laser marking and antibacterial properties, and 0.5 part of antioxidant . The org...

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Abstract

The invention discloses a polymer / modified organic montmorillonite laser marking material, and a preparation method and antibacterial application thereof. The preparation method comprises the following steps: firstly, preparing modified montmorillonite increased in interlayer spacing and surface-modified with an organic functional group; subjecting organic modified montmorillonite and polystyreneto melt blending to prepare laser marking master batch, wherein in order to further improve antibacterial property and the marking effect, nanometer zinc oxide is also added; and blending the laser marking master batch with macromolecules according to a certain proportion. A laser marking machine is used for carrying out surface laser treatment on the composite material, the near-infrared absorption characteristic of organic montmorillonite and the high-temperature easy-to-carbonize characteristic of interlayer polystyrene are used for inducing the surface of a polymer matrix to form a black carbonized and porous hydrophobic surface structure, and a clear laser marking pattern is obtained; and after surface laser treatment, nanometer antibacterial zinc oxide particles are exposed on the surface of the material, and the surface of the material has excellent antibacterial property by utilizing the antibacterial property of the nanometer zinc oxide and the porous hydrophobic structure after laser treatment.

Description

technical field [0001] The invention belongs to the field of new polymer materials, and in particular relates to laser treatment and antibacterial application of a polymer / modified organic montmorillonite / zinc oxide composite material surface. Background technique [0002] Laser marking technology is widely used in text and pattern marks on the surface of plastics, metals and ceramics. Some polymer materials such as polyolefins, thermoplastic polyurethanes and polymers are less sensitive to laser light, and it is difficult to absorb laser energy, which limits laser marking technology. Marking application on the surface of polymer products. In order to solve such problems, it is usually necessary to introduce inorganic laser-sensitive particles into the polymer matrix to prepare laser-markable materials, and use inorganic laser-sensitive particles to absorb laser energy to achieve photothermal conversion, thereby causing the polymer chains to carbonize and blacken, forming a ...

Claims

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Application Information

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IPC IPC(8): C08L55/02C08L23/06C08L23/12C08L75/04C08L25/06C08K9/04C08K9/06C08K3/34C08K3/22C08K7/00C08J3/22
CPCC08L55/02C08L23/06C08L23/12C08L75/04C08J3/226C08K2201/011C08K2003/2296C08K2201/003C08J2355/02C08J2323/06C08J2323/12C08J2375/04C08J2425/06C08L2207/062C08L25/06C08K9/04C08K9/06C08K3/346C08K3/22C08K7/00
Inventor 曹峥卢光威王凯伦高洪鑫罗可铭常嫄王倩杨雅雯成骏峰吴盾刘春林
Owner CHANGZHOU UNIV
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