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Nano-silver microsphere emulsion, and preparation method and applications thereof

A technology of nano-silver and nano-silver sol, which is applied in textiles, papermaking, fiber treatment, etc., can solve the problems of wide particle size distribution, insufficient long-term effect, and easy agglomeration of nano-silver, so as to solve the problem of not being resistant to soaping and realizing long-lasting effect of effectiveness

Inactive Publication Date: 2014-07-09
GUANGDONG VOCATIONAL & TECHNICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of method can effectively control the particle size and shape of the obtained nano-silver, the nano-silver obtained is easy to agglomerate and has a wide particle size distribution due to the carrier selection problem of the nano-silver, so it still has long-lasting effect when used on woven or knitted fabrics. Insufficient problem

Method used

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  • Nano-silver microsphere emulsion, and preparation method and applications thereof
  • Nano-silver microsphere emulsion, and preparation method and applications thereof
  • Nano-silver microsphere emulsion, and preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] With 4 g Pluronic F-127 (CAS: 9003-11-6, purchased from Sigma Company, molecular formula is HO(C 2 h 4 O) 100 (C 3 h 6 O) 65 (C 2 h 4 O) 100 H) Add to 1000 mL of deionized water, stir at 200 rpm at 0°C until completely dissolved, then add 2 g of silver nitrate, stir at 800 rpm at 45°C for 1 h to obtain silver nanoparticles with good water dispersibility The sol microspheres were freeze-dried at -80°C to obtain dry powder of nano-silver sol microspheres.

[0033] At 0°C, spread 1 g of nano-silver sol microsphere dry powder on the vibrating conveyor belt, melt paraffin (section paraffin, pathological grade, melting point 60-62°C) with a melt sprayer at 100°C, and spray it on the nano-silver Colloidal sol microsphere dry powder coating, the spray parameter is 10 mg / min cm 2 , the residence time of nano-silver sol microsphere dry powder in the melt spray area is 1 second, and then immediately cooled to 0 ℃; through 2 sprays, the coating thickness is 20 ± 2 nm, and ...

Embodiment 2

[0037] With 4 g Pluronic F-127 (CAS: 9003-11-6, purchased from Sigma Company, molecular formula is HO(C 2 h 4 O) 100 (C 3 h 6 O) 65 (C 2 h 4 O) 100 H) Add to 1000 mL of deionized water, stir at 300 rpm at 10°C until completely dissolved, then add 1.8 g of silver nitrate, stir at 700 rpm at 35°C for 2 h to obtain silver nanoparticles with good water dispersibility The sol microspheres were freeze-dried at -60°C to obtain dry powder of nano-silver sol microspheres.

[0038] At 10°C, spread 1 g of nano-silver sol microsphere dry powder on the vibrating conveyor belt, melt paraffin (section paraffin, pathological grade, melting point: 60-62°C) with a melt sprayer at 95°C, and spray it on the nano-silver Colloidal sol microsphere dry powder coating, the spray parameter is 10 mg / min cm 2 , the residence time of nano-silver sol microsphere dry powder in the melt spray area is 0.5 seconds, and then immediately cooled to 0 ℃; through 2 sprays, the cladding thickness is 21 ± 2 ...

Embodiment 3

[0041] With 4 g Pluronic F-127 (CAS: 9003-11-6, purchased from Sigma Company, molecular formula is HO(C 2 h 4 O) 100 (C 3 h 6 O) 65 (C 2 h 4 O) 100 H) Add to 1000 mL of deionized water, stir at 400 rpm at 20°C until completely dissolved, then add 1.6 g of silver nitrate, stir at 600 rpm at 25°C for 3 h to obtain silver nanoparticles with good water dispersibility The sol microspheres were freeze-dried at -40°C to obtain dry powder of nano-silver sol microspheres.

[0042] Spread 1 g of nano-silver sol microsphere dry powder on the vibrating conveyor belt at 20°C, melt paraffin (section paraffin, pathological grade, melting point 60-62°C) with a melt sprayer at 90°C, and spray it on the nano-silver Colloidal sol microsphere dry powder coating, the spray parameter is 10 mg / min cm 2 , the residence time of nano-silver sol microsphere dry powder in the melt spray area is 1 second, and then immediately cooled to 0 ℃; through 2 sprays, the coating thickness is 22 ± 2 nm, an...

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Abstract

The invention discloses an emulsion containing nano-silver solid microspheres, and a preparation method and applications thereof. According to the preparation method, PluronicF-127 is taken as a reducing agent and a dispersant for loading of nano-silver ions; and PluronicF-127 microspheres loaded with nano-silver ions are protected with paraffin via fusion spraying; and at last, combination with dopamine is realized so as to obtain the antibacterial finishing emulsion used for woven fabric or knitted fabric. Advantages and effects of the emulsion are that: (1) PluronicF-127 is an amphipathic chain-segment polymer, is capable of forming micelles in water, and can be used as the reducing agent and the dispersant of nano-silver; (2) solid paraffin is taken as a hydrophobic protective agent, and can be used for protecting nano-silver frozen powder from water so as to prolong antibacterial activity preservation period; (3) the emulsion possesses excellent dip coating performance, and can be used for antibiotic finish of woven fabric or knitted fabric as a functional finishing agent, and more than 98% of antibacterial activity can be maintained after 200 times of soaping; and (4) the emulsion containing nano-silver solid microspheres is capable of resisting oxidation, acid, alkali, light, and water.

Description

technical field [0001] The invention belongs to the field of textile functional auxiliaries, in particular to an emulsion containing nano-silver solid microspheres, a preparation method thereof and an application in woven or knitted fabrics. Background technique [0002] Functional finishing method is a method of padding functional additives on conventional woven or knitted fabrics to make them have certain functions. choose. With the development of science and technology and the improvement of human living standards, people's pursuit of quality of life tends to be more environmentally friendly and healthy. The antibacterial problem of woven or knitted fabrics has attracted more and more attention from all over the world. Therefore, it is very helpful to develop a safe, durable and universal antibacterial finishing method to improve people's quality of life. [0003] At present, foreign antibacterial woven or knitted fabrics have entered a stable development stage, of whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D06M15/61
Inventor 何丽清薛桂萍任洁
Owner GUANGDONG VOCATIONAL & TECHNICAL COLLEGE
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