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Preparation method of nano cellulose dispersion liquid

A technology of nanocellulose and dispersion liquid, which is applied in the field of preparation of nanocellulose dispersion liquid, can solve the problems of many operation steps, high preparation cost, unfriendly environment, etc., and achieve good dispersibility and stability, simple preparation method, The effect of reducing energy consumption

Active Publication Date: 2017-05-10
MATERIAL & IND TECH RES INST BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to overcome the above-mentioned problems of prior art preparation of nanocellulose dispersion, many operation steps, high preparation cost and unfriendly environment, and provide a kind of nanocellulose with simple steps, low preparation cost and environmental friendliness A method for preparing a dispersion, and the nanocellulose dispersion obtained by the method has good dispersibility and stability

Method used

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Examples

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Effect test

preparation example Construction

[0015] The preparation method of the nanocellulose dispersion liquid provided by the invention comprises the following steps:

[0016] 1) contacting the cellulose raw material with a hydrophilic solvent to obtain a wetted cellulose raw material;

[0017] 2) Grinding the wetted cellulose raw material in the presence of a dispersant;

[0018] Wherein, the dispersant is alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, sodium dodecylsulfonate, sodium dodecylbenzenesulfonate, polyvinylpyrrole Alkanone, polyacrylamide, polysorbate, sorbitan fatty ester, sodium cellulose, 2,2,6,6-tetramethylpiperidine oxide, polyethylene glycol, betaine-type surfactant and one or more of quaternary ammonium salt cationic surfactants.

[0019] According to the present invention, the cellulose raw material may be various celluloses commonly used in the art to prepare nanocellulose dispersions. Preferably, the cellulose raw material is one or more of plan...

Embodiment 1

[0039] 1) Add 900 parts by weight of distilled water to 100 parts by weight of lignocellulose (purchased from Menghu Bamboo Fiber Company, about 100-500 μm in length and about 10 μm in diameter), and soak for 30 minutes at 25° C. to obtain sufficient moisture wet cellulose.

[0040] 2) After the cellulose after wetting is mixed with 100 parts by weight of dispersant (sodium dodecylbenzene sulfonate, purchased from Shanghai Yingpeng Reagent), it is mixed in a sand mill (Senler (Shanghai) Machinery Equipment Co., Ltd. ExdⅡBT4 model) was added zirconium beads (1 mm in diameter, the same below) for grinding to obtain a nanocellulose dispersion. The grinding conditions are as follows: the grinding temperature is 30° C., the grinding time is 80 hours, and the grinding speed is 1000 rpm.

[0041] When observing the obtained nanocellulose dispersion liquid with a scanning electron microscope (purchased from the S-3400II model of Hitachi, Japan), the nanocellulose was distributed in a s...

Embodiment 2

[0043] 1) Add 1150 parts by weight of distilled water to 100 parts by weight of lignocellulose (purchased from Menghu Bamboo Fiber Company, with a length of about 1000-2000 μm and a diameter of about 30 μm), then soak at 35° C. for 90 minutes to obtain sufficient moistening wet cellulose.

[0044] 2) After the cellulose after wetting is mixed with 50 parts by weight of dispersant (nonylphenol polyoxyethylene ether, purchased from Zibo Haijie Chemical Co., Ltd., model is NP-4), it is mixed in a sand mill (Senler ( (Shanghai) Mechanical Equipment Co., Ltd. (ExdⅡBT4 model) added zirconium beads for grinding to obtain a nanocellulose dispersion. The grinding conditions are as follows: the grinding temperature is 50° C., the grinding time is 240 hours, and the grinding speed is 1500 rpm.

[0045] When observing the obtained nanocellulose dispersion liquid with a scanning electron microscope (purchased from the S-3400II model of Hitachi, Japan), the nanocellulose was distributed in...

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Abstract

The invention relates to the field of preparation of nano cellulose dispersion liquid, and discloses a preparation method of nano cellulose dispersion liquid. The method comprises the following steps: 1) contacting a cellulosic material and a hydrophilic solvent to obtain the wet cellulosic material; and 2) under existence of a dispersant, grinding the wet cellulosic material; wherein, the dispersant is one or more of alkylphenol polyoxyethylene, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, sodium dodecanesulphonate, sodium dodecyl benzene sulfonate, polyethylene imidacloprid network flavanone, polyacrylamide, polysorbate, anhydrosorbitol fatty ester, cellulose sodium, 2,2,6,6-tetramethyl piperidine oxide, polyethylene glycol, a betaine-type surfactant and a quaternary ammonium salt-type cationic surfactant. The preparation method has the advantages of simple process, low preparation cost and environment protection, and the nano cellulose dispersion liquid has good dispersibility and stability.

Description

technical field [0001] The invention relates to a preparation method of nano-cellulose dispersion liquid. Background technique [0002] Cellulose generally ranges from a few nanometers to hundreds of nanometers, and cellulose fibers in this size range are generally called nanocellulose. In common cellulose-based materials, the above-mentioned nanofibrous units are bound very firmly due to strong hydrogen bonds, which makes the preparation of nanocellulose particularly difficult and requires special processing techniques. [0003] Nanocellulose can be prepared by chemical acid hydrolysis, physical pulverization, and biological extraction. At present, various preparation methods have certain defects and limitations. The chemical acid hydrolysis method takes a long time to react, and the preparation process requires a large amount of high-concentration sulfuric acid or hydrochloric acid, which is likely to cause corrosion of equipment and environmental pollution, and it is dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08J3/09C08L1/02C08L97/02
Inventor 黄宏伟智云霞高鹏辉赵珍
Owner MATERIAL & IND TECH RES INST BEIJING
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