Cellulose nanocrystal suspension and preparation method thereof

A cellulose and nanocrystal technology, applied in the fields of polymers and nanomaterials, can solve the problems of preparation and research of cellulose nanocrystals, which are rarely reported, and achieve the effects of improved performance, uniform size and simple synthesis process.

Inactive Publication Date: 2012-09-26
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cellulose nanocrystals have become a hot spot in the field of polymer research, b

Method used

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  • Cellulose nanocrystal suspension and preparation method thereof
  • Cellulose nanocrystal suspension and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Raw material pretreatment

[0026] Wet milling method: shred the cellulose pulp and add deionized water (prepared concentration 5%), soak for 12 hours, then pour it into a wet mill and grind it 5 times (gear spacing is 1 μm), 5 minutes each time.

Embodiment 2

[0028] Raw material pretreatment

[0029] Ultrasonic method: Add deionized water (prepared concentration: 3%) to the microcrystalline cellulose powder, soak for 2 hours, put it into an ultrasonic machine and ultrasonicate 5 times (ultrasonic frequency 1000Hz), 5 minutes each time.

Embodiment 3

[0031] Raw material pretreatment

[0032] Ball milling method: shred the cellulose pulp, add deionized water (prepared concentration 3%), soak for 12 hours, pour it into a ball mill and grind it 5 times (gear spacing is 2μm), 5 minutes each time.

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Abstract

The invention discloses a cellulose nanocrystal suspension and a preparation method thereof. The suspension comprises water and cellulose nanocrystals dispersed in water, and the cellulose nanocrystals are rodlike nano particles with the length-width ratio being 1:100. The preparation method comprises the following steps: performing pretreatment on cellulose raw material; adding an 0.1-30 times by weight of oxidant in the pretreated cellulose raw material, and hydrolyzing for 1 to 24 hours at 20 to 80 DEG C to obtain a hydrolysate; adding 1 to 10 times the weight of distilled water in the hydrolysate to dilute to remove the oxidant to obtain solution with the PH value being 5 to 9; and further reducing the sizes of the particles through a mechanical method to obtain the cellulose nanocrystal suspension. The nanomaterial can be prepared by renewable resources, the cost is low, the synthesis technology is simple, the synthesis process is green and free from contamination, and the obtained product is green and environmental-friendly.

Description

technical field [0001] The invention relates to a cellulose nanocrystal suspension and a preparation method thereof, which belongs to the field of macromolecules and also belongs to the field of nanomaterials. Background technique [0002] Cellulose is the most abundant organic compound on Earth. It is a major component of the cell wall structure of higher plants and green algae, and is also formed by bacteria, certain fungi, and tunicates (invertebrate marine animals). Because of its low cost, self-renewal ability and recyclability, and its chemical reactivity, cellulose whiskers can be used in various applications, and their processing and utilization will inevitably bring high economic value. Cellulose nanocrystals have become a hot spot in the field of polymer research, but there are few reports on the preparation and research of cellulose nanocrystals. Contents of the invention [0003] The object of the present invention is to provide a cellulose nanocrystal suspen...

Claims

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Application Information

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IPC IPC(8): C08B15/08C08B15/02
Inventor 刘大刚周凡林凤英花艳
Owner NANJING UNIV OF INFORMATION SCI & TECH
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