Modified nano oxide, preparation method and application method of self-emulsifying dispersion liquid thereof

A nano-oxide, nano-zinc oxide technology, applied in natural fibers, textiles and papermaking, fiber processing, etc., can solve the problems of high cost, high resource consumption, environmental pollution, etc., achieve good dispersion, simple preparation process, overcome the Easy to drain effect

Inactive Publication Date: 2011-12-14
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method consumes a lot of resources, is costly, and has certain pollution to the environment.

Method used

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  • Modified nano oxide, preparation method and application method of self-emulsifying dispersion liquid thereof
  • Modified nano oxide, preparation method and application method of self-emulsifying dispersion liquid thereof
  • Modified nano oxide, preparation method and application method of self-emulsifying dispersion liquid thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Preparation of prefabricated body:

[0054] Under the protection of nitrogen, dehydrate polyethylene glycol for 1.5h at 105°C under a vacuum of 100-150mmHg; cool down to 55-50°C, then slowly add diisocyanate and dibutyltin dilaurate, and heat up 80 ℃ for 2.5 hours to obtain the prepolymer B. The molar ratio of polyethylene glycol, diisocyanate and dibutyltin dilaurate is 2.05:1:0.0001;

[0055] 2. Modification process:

[0056] Raise the temperature of prepolymer B to 95°C, add nano-zinc oxide to react for 6 hours, cool down to 20-25°C, add absolute ethanol, then slowly add saturated sodium bisulfite solution, and react for 2 hours;

[0057] 3. Dispersion process:

[0058] The obtained modified nano-zinc oxide is dispersed in water through a high-speed disperser or an ultrasonic disperser to obtain a self-emulsifying dispersion of the modified nano-oxide. The weight percent of the modified nano-oxide self-emulsifying dispersion is 15%. Good dispersion stability,...

Embodiment 2

[0060] Except that the molar ratio of the isocyanate group (-NCO) to the polyethylene glycol (-OH) in the MDI is 1.4-2.2:1, the rest is the same as the first embodiment. The results are shown in Table 1:

[0061] Table 1:

[0062] N(NCO):n(OH)

Solution properties

1.4∶1

light yellow translucent

1.6∶1

yellow translucent

1.8∶1

yellow transparent

2.05∶1

yellow transparent

2.2∶1

flocculent

[0063] Shown by Table 1:

[0064] The molar ratio of isocyanate group (-NCO) to polyethylene glycol (-OH) in MDI seriously affects the properties of polyurethane modifiers containing terminal isocyanate groups (-NCO), which in turn affects the quality of nano-titanium dioxide finishing solution . When the molar ratio of NCO to -OH is closer to 1, the viscosity of the late system will be greater, the reaction will be more difficult to control, and the gel will be easier. The optimal molar ratio n(NCO):n(OH) is 2.05:1, ...

Embodiment 3

[0066] Except the temperature of prepolymer B, the reaction time, all the other are identical with embodiment one. The results are shown in Table 2:

[0067] Table 2: Effect of prepolymerization temperature and time on reaction

[0068] 30min

[0069] It can be seen from Table 2 that in the preparation of polyurethane modifiers containing terminal isocyanate groups (-NCO), if the temperature is too low, the isocyanate is not completely reacted, and free isocyanate monomers and polyols remain, resulting in incomplete reaction. As the temperature increases, the reaction rate of isocyanate and various active hydrogen compounds increases. If the temperature is too high, the end group -NCO is easy to form multi-point crosslinks with the -NH- or urea bonds on the polyurethane, resulting in a sharp increase in the relative molecular weight, an increase in the degree of branching, and gelation. The closer the reaction is to the end point, the closer the -NCO percentage i...

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Abstract

The invention discloses a modified nano-oxide, which is a product with the following structural formula: wherein: A is a nano-oxide, which is nano-titanium dioxide, nano-zinc oxide, silver-doped nano-titanium dioxide, silver-doped nano-zinc oxide, nano-oxide One of silicon, or a compound of two of them; R1 with two isocyanates is a diisocyanate, including TDI, MDI, HDI, NDI, IPDI; Y is a blocking agent, including ethanol, Sodium bisulfite, caprolactam, phenol; n is 10-135. The invention also discloses a preparation method and a use method of the self-emulsifying dispersion liquid of the modified nanometer oxide. The self-emulsifying dispersion of modified nano-oxides prepared by the above technical scheme can be used for functional finishing of textiles, so that natural fiber textiles have anti-ultraviolet, infrared absorption and antibacterial properties after finishing.

Description

technical field [0001] The invention belongs to the technical field of finishing aids for textiles, in particular, the invention relates to modified nano oxides. In addition, the present invention also relates to a preparation method and a use method of the self-emulsifying dispersion liquid of the modified nano-oxide. Background technique [0002] Nano-titanium dioxide and nano-zinc oxide are high-performance functional inorganic materials with strong photocatalysis, antibacterial and ultraviolet shielding properties, and are widely used in textile materials. Due to the small particle size, large specific surface area, and high surface energy of nano-titanium dioxide and nano-zinc oxide, nanoparticles are easy to agglomerate, and at the same time, the combination of nano-titanium dioxide and nano-zinc oxide with textile materials, especially natural fibers, is not durable enough, which limits its popularization and application. . [0003] In order to improve the dispersio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M11/44D06M11/83D06M11/79D06M101/02
Inventor 刘新华陶旭晨汪文睿方寅春武志光迟二燕
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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