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A kind of method and application of utilizing coconut shell fiber to prepare nano-fibrils of different scales

A technology for coconut husk fibers and fibers, which is applied in the field of preparing nanofibrils of different scales by an oxidation method, can solve the problems of high efficiency, easily corroded equipment, and pollution by chemical methods, and achieves high efficiency, low corrosiveness, and low energy consumption. Effect

Active Publication Date: 2019-07-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical method has pollution and is easy to corrode the equipment, but the efficiency is high

Method used

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  • A kind of method and application of utilizing coconut shell fiber to prepare nano-fibrils of different scales
  • A kind of method and application of utilizing coconut shell fiber to prepare nano-fibrils of different scales
  • A kind of method and application of utilizing coconut shell fiber to prepare nano-fibrils of different scales

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of method that utilizes coconut shell fiber to prepare nano-fibrils of different scales, concrete steps are:

[0049] (1) Opening and removing impurities, scouring and swelling, and cleaning to remove adherent impurities: the coconut shells are loosened by mechanical striking, rubbing and pulling, and the adhered coconut shell fibers and impurities at the roots are removed to obtain fiber clusters. The fiber mass is scoured, washed and squeezed to remove water. The specific steps of scouring, washing and squeezing to remove water include placing the fiber mass in a beaker, completely submerging it in water, and placing it in a 98°C water bath Carry out scouring and swelling for 1 hour, stir with a rotating speed of 500rpm while scouring, and use a multi-stage roller device to squeeze the fiber mass to remove water after scouring, wash with water, and then squeeze to remove water; the scouring, Washing and extruding to remove the water cycle for 4 times to remove ...

Embodiment 2

[0055] A kind of method that utilizes coconut shell fiber to prepare nano-fibrils of different scales, concrete steps are:

[0056] (1) Opening and removing impurities, scouring and swelling, and cleaning to remove adherent impurities: the coconut shells are loosened by mechanical striking, rubbing and pulling, and the adhered coconut shell fibers and impurities at the roots are removed to obtain fiber clusters. The fiber mass is scoured, washed and squeezed to remove water. The specific steps of scouring, washing and squeezing the water include placing the fiber mass in a beaker, completely submerging it in water, and placing it in a water bath at 80°C. Carry out scouring and swelling for 3 hours, stir with a rotating speed of 500rpm while scouring, and use a multi-stage roller device to squeeze the fiber mass to remove water after scouring, wash with water, and then squeeze to remove water; the scouring, Washing and extruding to remove the water cycle for 3 times to remove t...

Embodiment 3

[0062] A kind of method that utilizes coconut shell fiber to prepare nano-fibrils of different scales, concrete steps are:

[0063] (1) Opening and removing impurities, scouring and swelling, and cleaning to remove adherent impurities: the coconut shells are loosened by mechanical striking, rubbing and pulling, and the adhered coconut shell fibers and impurities at the roots are removed to obtain fiber clusters. The fiber mass is scoured, washed and squeezed to remove water. The specific steps of scouring, washing and squeezing to remove water include placing the fiber mass in a beaker, completely submerged in water, and placed in a 70°C water bath Carry out scouring and swelling for 3 hours, stir with a rotating speed of 500rpm while scouring, and use a multi-stage roller device to squeeze the fiber mass to remove water after scouring, wash with water, and then squeeze to remove water; the scouring, Washing and extruding to remove the water cycle for 3 times to remove the int...

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Abstract

The invention provides a method of using coconut fiber for preparing nano fibril of different scales. The method is characterized by including the steps that swelled and separated native cellulose fiber and part of unicellular tubular fiber are completely soaked in a mixed solution containing NaOH and NaClO according to the solid-liquid weight ratio of 1:30-1:50, the concentration of NaOH in the mixed solution containing NaOH and NaClO is 20-80 g / L, the concentration of NaClO is 15-65 g / L, and the fiber is stirred at the temperature of 60-98 DEG C and synchronously vibrated for 1-20 h with ultrasonic waves to obtain the mixed solution containing the nano fibril; centrifugal separation is carried out on the obtained mixed solution containing the nano fibril for the first time to remove impurities, and then subnatant is taken to carry out the steps A, B and C. Targeting swelled and dissolved fibril mesenchyme and ultrasonic microbubble impact enlargement are used to efficiently separate micron fibril and base fibril in a low-damage mode, which is beneficial for high-technology and refined cyclic utilization of the coconut fiber and beneficial for sustainable development of cellulosic fiber resources.

Description

technical field [0001] The invention relates to a method for preparing nano-fibrils of different scales by utilizing coconut shell fibers, in particular to a method and application of preparing nano-fibrils of different scales by an oxidation method. Background technique [0002] Cellulose is an inexhaustible, inexhaustible, green, non-polluting renewable resource in nature. The annual growth of plant cellulose on the earth is as high as hundreds of millions of tons, exceeding the total existing oil reserves, but the utilization amount is very small. Most of them are naturally degraded and burned as fuel, which itself is a kind of pollution. It is reported that the loss caused by environmental pollution and ecological damage has accounted for 15% of the total GDP, which means that there is a 9% economic growth on the one hand and a loss rate of 15% on the other. When human society is faced with many problems such as resource poverty, energy crisis, and environmental polluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B15/08
CPCD01C1/00
Inventor 刘洪玲于伟东谢文雅
Owner DONGHUA UNIV
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