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Nano silicon dioxide grafted halamine antibacterial melt-blown material as well as preparation method and application thereof

A nano-silica, silicon dioxide technology, applied in rayon manufacturing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of difficult release of halogen elements, potential safety hazards, poor antibacterial effect, etc., and achieve electrostatic charge High content, improved filtration effect, antibacterial content is not easy to lose the effect

Active Publication Date: 2022-04-26
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weak point of this method is: the 1-vinylimidazole that introduces makes the smell of material very big, has potential safety hazard; make it less effective against bacteria

Method used

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  • Nano silicon dioxide grafted halamine antibacterial melt-blown material as well as preparation method and application thereof
  • Nano silicon dioxide grafted halamine antibacterial melt-blown material as well as preparation method and application thereof
  • Nano silicon dioxide grafted halamine antibacterial melt-blown material as well as preparation method and application thereof

Examples

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Comparison scheme
Effect test

preparation example Construction

[0030]The invention provides a preparation method of nano-silica grafted haloamine antibacterial melt-blown material, comprising the following steps:

[0031] S1. Preparation of modified silica:

[0032] The volume ratio of isopropanol and water is (2-5): 1 to form a mixed solution, and the γ-mercaptopropyltrimethoxysilane coupling agent is added to the mixed solution for hydrolysis to form a silanol structure. Then, hydrophilic nano silicon dioxide is added to the obtained solution, and after ultrasonic dispersion for 20-50 minutes, it is heated to reflux at 75-85°C. Finally, the mixed solution is centrifuged and washed, and the centrifuged product is vacuum-dried to obtain modified silicon dioxide.

[0033] Wherein, the mass ratio of hydrophilic nano silicon dioxide and γ-mercaptopropyltrimethoxysilane coupling agent is (8-12):(1-5).

[0034] In this process, hydrophilic silica is used, and its hydrophilicity is used to uniformly disperse it in the mixed solution containin...

Embodiment 1

[0056] A preparation method of nano silicon dioxide grafted haloamine antibacterial melt-blown material, comprising the following steps:

[0057] S1. Preparation of modified silica:

[0058] Prepare isopropanol and water at a volume ratio of 3:1 to form a mixed solution, and add γ-mercaptopropyltrimethoxysilane coupling agent into the prepared mixed solution for hydrolysis to form a silanol structure. Then, hydrophilic nano silicon dioxide was added to the obtained solution, and after ultrasonic dispersion for 30 min, it was heated to reflux at 80°C. Finally, the mixed solution is centrifuged and washed, and the centrifuged product is vacuum-dried to obtain modified silicon dioxide.

[0059] Wherein, the mass ratio of hydrophilic nano silicon dioxide and γ-mercaptopropyltrimethoxysilane coupling agent is 10:3.

[0060] S2. Preparation of silica grafted N-halamine precursor powder:

[0061] Mix the modified nano-silica, 1-allylhydantoin and benzoin dimethyl ether prepared in...

Embodiment 2-3

[0073] A kind of preparation method of nano-silica grafted halide amine antibacterial melt-blown material, compared with embodiment 1, the difference is that in step S3, nano-silica grafted N-halamine precursor powder and melt Mass ratio of sprayed polypropylene resin m 1 :m 2 It is different, and the others are substantially the same as those in Embodiment 1, and will not be repeated here.

[0074] The nano-silica grafted haloamine antibacterial melt-blown material prepared in Examples 1-3 is subjected to a performance test, and the results are shown in Table 1. The bactericidal rate refers to the bactericidal rate of Escherichia coli, and the filtration efficiency refers to the bactericidal rate after chlorinated electret. Filtration efficiency of melt-blown material (without repeated regeneration) for 0.3 μm sodium chloride aerosol:

[0075] The performance test of the nano silicon dioxide grafted haloamine antibacterial melt-blown material prepared by table 1 embodiment ...

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Abstract

The invention provides a nano silicon dioxide grafted halamine antibacterial melt-blown material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding hydrophilic nano silicon dioxide into a sulfydryl silane coupling agent solution, and reacting to obtain modified silicon dioxide; bonding the modified nano silicon dioxide with an N-halamine precursor by using a photoinitiator to obtain silicon dioxide grafted N-halamine precursor powder; mixing the powder with melt-blown polypropylene resin according to a preset proportion, and adding the mixture into a melt-blowing machine for melt-blowing treatment to obtain a silicon dioxide grafted N-halamine melt-blown material; the melt-blown material is soaked in a sodium hypochlorite solution, and the nano-silica grafted N-halamine antibacterial melt-blown material is obtained. The antibacterial melt-blown material prepared by the invention is high in antibacterial rate, high in filterability, long in antibacterial aging and long in service life, and the antibacterial components can be regenerated repeatedly.

Description

technical field [0001] The invention relates to the technical field of antibacterial materials, in particular to a silica-grafted haloamine antibacterial melt-blown material and its preparation method and application. Background technique [0002] Under the global background of the influenza virus pandemic, medical masks have become a necessity in people's daily life. As the core material of medical masks, polypropylene melt-blown material uses its three-dimensional disordered fiber structure to absorb and block the invasion of external pathogens. However, since polypropylene does not have any bactericidal and antiviral effects, the pathogens trapped on the mask still survive. If the mask is worn improperly, it will easily cause the risk of infection to the human body; and if the used mask is not timely and properly Handling will create a potential source of infection and threaten the safety of others. In the past five years, the output value of masks in my country has inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/56D04H1/728D01F6/46D01F1/10
CPCD04H1/56D04H1/728D01F6/46D01F1/10D01F1/103D10B2321/022Y02A50/30
Inventor 王栋赵青华陈卓梅涛宋银红尤海宁刘轲
Owner WUHAN TEXTILE UNIV
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