Wood fiber microfilament dissociation method based on soft nanometer paper base material

A wood fiber and microfibril technology, applied in the field of materials, can solve problems such as hindering the application research and industrialization of nanofiber materials, and the lack of breakthrough progress in new flexible nanofiber materials, so as to avoid the ultra-wide and high length distribution. Yield, size uniform effect

Active Publication Date: 2014-07-30
NANJING FORESTRY UNIV
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Problems solved by technology

Therefore, the preparation of new flexible nanofiber materials has basically not made breakthrough progress, which seriously hinders the application research and industrialization of nanofiber materials in flexible electronic products.

Method used

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Experimental program
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Embodiment

[0021] A lignofiber microfibril dissociation method based on flexible nano paper base material, comprising the following steps:

[0022] (1) Disperse 200g of pulp fibers in 20kg of water to prepare a fiber suspension, and use a beater to quickly chop the fibers, and the length of the chopped fibers is controlled at 500-1000um.

[0023] (2) Disperse 400g of chopped fibers in 20kg of water to prepare a fiber suspension, use a hammering force perpendicular to the fiber axis to mechanically hammer the fibers, gradually increase the hammering force from 0.5kg to 10kg, and continuously hammer Hit until the outer layer of the primary fiber wall and the secondary wall is broken or peeled off.

[0024] (3) Put the hammered fiber into the kneading and shearing equipment. The rotation speed of the flying knife is controlled at 1000 rpm, and the kneading time is from 1min to 20min. Under the action of force, the dissociation of the fiber microfibril layer is realized, and the preliminary...

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Abstract

The invention provides a wood fiber microfilament dissociation method based on a soft nanometer paper base material. The wood fiber microfilament dissociation method comprises the following steps: cutting off and cutting short paper pulp fibers by a pulping machine, and controlling the length of the cut fibers between 500 micrometers and 1000 micrometers; squashing the cut paper pulp fibers by hammering force which is perpendicular to the axial direction of the fibers until the primary cell wall and secondary cell wall outer layers of the fibers are broken or peeled; then utilizing rubbing and shearing force perpendicular to the axial direction of the fibers to separate microfilament layers so as to obtain primarily nano-crystallized fiber microfilaments; finally carrying out high-shear flattening treatment on the primarily nano-crystallized fiber microfilaments to obtain the soft nanometer fibers with uniform size. The method has the advantages of high product yield, uniform size and capability of batch preparing.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a method for dissociating wood fiber microfibrils based on flexible nano paper-based materials. Background technique [0002] Natural plant fiber resources are abundant, and the prepared nanofiber paper material is green and environmentally friendly. It can esterify, oxidize, etherify, and graft the free hydroxyl groups on the cellulose molecules to endow the fibers with special properties or functions. Nano paper-based materials have high elastic modulus, porous structure, low thermal expansion coefficient, and flexible and rollable characteristics. When nanofiber materials are used as electrode diaphragm materials for supercapacitors and lithium-ion batteries, they have a large contact area with the electrolyte, a short ion-deintercalation distance, and a stable structure during the ion-deintercalation process, which can effectively improve the capacity and cycle life of the battery. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/02
Inventor 戴红旗李关莲卞辉洋焦丽皮成忠
Owner NANJING FORESTRY UNIV
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