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Nonionic reverse micelle system modified nano microcrystalline cellulose and modification method thereof

A non-ionic, nano-microcrystalline technology, applied in the field of nano-microcrystalline cellulose and its modification, achieves the effects of simple application, simple method and convenient operation

Inactive Publication Date: 2015-01-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the use of reverse micelles to prepare composite nanoparticles with inorganic substances or polymers as the carrier and surface modification of the generated nanoparticles with organic dyes have also become research hotspots in this field, but there is no report on their use. Directly applied to the modification of polar substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Non-ionic reverse micellar system modified nano-microcrystalline cellulose:

[0033] The non-ionic surfactant fatty alcohol polyoxyethylene ether AEO-9, the co-surfactant n-propanol and the organic solvent methylene chloride were prepared as a working solution at 25°C; then the working solution was ultrasonically treated with an ultrasonic power of 600W , the treatment time is 30min, and a stable reverse micellar system is obtained; the reverse micellar system is stabilized as a clear and transparent solution, centrifuged at a high speed by a centrifuge at a speed of 5000r / min for 30min, and the solution is not turbid, which is a stable system. Wherein, the concentration of fatty alcohol polyoxyethylene ether in the reverse micelle system is 0.01 g / mL, and the mass percentage of n-propanol and fatty alcohol polyoxyethylene ether is 12.5%. Add 0.5% nanocrystalline cellulose aqueous dispersion to the above reverse micelles system, and ultrasonically treat for 5 minutes to...

Embodiment 2

[0035] Non-ionic reverse micellar system modified nano-microcrystalline cellulose:

[0036]The non-ionic surfactant alkylphenol polyoxyethylene ether OP-7, the co-surfactant n-butanol and the organic solvent chloroform were formulated at 25°C to make a working solution; then the working solution was ultrasonically treated, and the ultrasonic power 1000W, the treatment time is 5min, and a stable reverse micelle system is obtained; the reverse micelle system is stabilized as a clear and transparent solution, centrifuged at a high speed by a centrifuge at a speed of 8000r / min for 20min, the solution is not turbid, and it is a stable system. Wherein, the concentration of alkylphenol polyoxyethylene ether OP-7 in the reverse micelle system is 0.05g / mL, and the mass percentage of n-butanol and alkylphenol polyoxyethylene ether OP-7 is 150%. Add 0.5% nanocrystalline cellulose aqueous dispersion to the above reverse micelles system, and ultrasonically treat for 5 minutes to obtain a s...

Embodiment 3

[0038] Non-ionic reverse micellar system modified nano-microcrystalline cellulose:

[0039] The non-ionic surfactant fatty alcohol polyoxyethylene ether AEO-11, the co-surfactant n-octanol and the mixed organic solvent toluene and n-hexane are prepared at 25°C as a working solution, and the mass percentage of toluene and n-hexane is 200%; Then, the working solution was ultrasonically treated with an ultrasonic power of 800W and a treatment time of 25 minutes to obtain a stable reverse micelle system; the reverse micelle system was stabilized as a clear and transparent solution, which was centrifuged at a high speed by a centrifuge at a speed of 8000r / min. After 20 minutes, the solution is not turbid, which is a stable system. Wherein, the concentration of fatty alcohol polyoxyethylene ether AEO-11 in the reverse micelle system is 0.12 g / mL, and the mass percentage of n-octanol and fatty alcohol polyoxyethylene ether AEO-11 is 50%. Add 1.5% nanocrystalline cellulose aqueous di...

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Abstract

The invention relates to nonionic reverse micelle system modified nano microcrystalline cellulose and a modification method thereof. The nonionic reverse micelle system modified nano microcrystalline cellulose is characterized in that nano microcrystalline cellulose is wrapped in a polar core of a reverse micelle system, and a continuous organic phase is arranged on the outside of the nano microcrystalline cellulose, wherein the reverse micelle system is prepared from a nonionic surfactant, a cosurfactant and an organic solvent through ultrasonic treatment; and the organic solvent is a weak-polarity organic solvent or the combination of a weak-polarity organic solvent and a non-polar organic solvent. According to the invention, preparation raw materials are commonly used industrial raw materials, thereby being easy to obtain; and the obtained reverse micelle system is stable, large in solubilized water yield and controllable in particle size, and can well disperse the nano microcrystalline cellulose with good stability. The modification method is simple in operation, and does not change the original shapes of nanoparticles, thereby keeping the original properties of nanoparticles. The modified nano microcrystalline celluloses can be applied to the fields of materials, medicines, textiles, and the like.

Description

technical field [0001] The invention relates to a nano-microcrystalline cellulose modified by a non-ionic reverse micelle system and a modification method thereof, in particular to a reverse micelle system made of a non-ionic surfactant in a weakly polar solvent Nano microcrystalline cellulose modified by non-ionic reverse micelles system modified by nano microcrystalline cellulose and its modification method. Background technique [0002] Due to the poor dispersion of nano-microcrystalline cellulose in organic solvents, its application in composite materials is greatly limited. [0003] At present, the method of modifying nanocrystalline cellulose is mainly through chemical modification, including esterification, etherification, oxidation, silanization, polymerization and grafting reaction, etc. However, the chemical modification method needs to strictly control the reaction conditions to protect the original form of nanocrystalline cellulose, avoid any polymorphic transfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/28C08J3/09C08L1/02
Inventor 阎克路赵群陈怡秀朱青
Owner DONGHUA UNIV
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