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Preparation method of hemp fiber sound insulation cotton

A technology of hemp fiber and sound-proof cotton, which is applied in the field of preparation of hemp fiber sound-proof cotton, can solve the problems of poor durability, poor sound-absorbing effect of sound-proof cotton, and poor aging resistance, so as to improve mechanical strength, increase roughness, strengthen The effect of sound absorption

Inactive Publication Date: 2020-05-05
YUNNAN LVXIN BIOLOGICAL PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of hemp fiber sound-proof cotton for the defects of poor sound-absorbing effect, poor durability and poor aging resistance of the current sound-proof cotton

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1. Put the hemp leaf residue after supercritical extraction and the hemp stalk into the oven at a mass ratio of 2:3 (hemp leaf residue: hemp stalk), set the drying temperature to 130°C, and dry for 2 hours to obtain a dry mixture , put the dry mixture into the reactor, add hydrochloric acid with a mass fraction of 10% according to the mass ratio of 2:9 (dry mixture:hydrochloric acid), and mix and stir at a speed of 150r / min for 5h to prepare a mixed solution.

[0029] Step 2. Add aluminum chloride solution dropwise to the reactor, the amount added is 10% of the mass of the mixed solution, turn on the ultrasonic generator, set the frequency to 36-38kHz, and oscillate ultrasonically for 3 hours to prepare a mixed slurry, and then add the mixed slurry to the mixed slurry Add nickel powder in an amount of 10% of the mass of the mixed slurry, and mix and stir for 80 minutes at a speed of 200r / min to prepare a modified slurry.

[0030] Step 3, filter the modified slurry ...

Embodiment 2

[0035] Step 1. Put the hemp leaf residue after supercritical extraction and the hemp stalk into the oven at a mass ratio of 3:4 (hemp leaf residue: hemp stalk), set the drying temperature to 130°C, and dry for 2 hours to obtain a dry mixture , put the dry mixture into the reactor, add hydrochloric acid with a mass fraction of 10% at a mass ratio of 1:5 (dry mixture:hydrochloric acid), and mix and stir at a speed of 150r / min for 5h to prepare a mixed solution.

[0036] Step 2. Add aluminum chloride solution dropwise to the reactor, the amount added is 10% of the mass of the mixed solution, turn on the ultrasonic generator, set the frequency to 36-38kHz, and oscillate ultrasonically for 3 hours to prepare a mixed slurry, and then add the mixed slurry to the mixed slurry Add nickel powder in an amount of 10% of the mass of the mixed slurry, and mix and stir for 80 minutes at a speed of 200r / min to prepare a modified slurry.

[0037] Step 3, filter the modified slurry in step 2 to...

Embodiment 3

[0042] Step 1. Put the hemp leaf residue after supercritical extraction and the hemp stalk into the oven at a mass ratio of 2:3 (hemp leaf residue: hemp stalk), set the drying temperature to 130°C, and dry for 2 hours to obtain a dry mixture , put the dry mixture into the reactor, add hydrochloric acid with a mass fraction of 10% according to the mass ratio of 2:9 (dry mixture:hydrochloric acid), and mix and stir at a speed of 150r / min for 5h to prepare a mixed solution.

[0043] Step 2. Add aluminum chloride solution dropwise to the reactor, the amount added is 10% of the mass of the mixed solution, turn on the ultrasonic generator, set the frequency to 36-38kHz, and oscillate ultrasonically for 3 hours to prepare a mixed slurry, and then add the mixed slurry to the mixed slurry Add nickel powder in an amount of 10% of the mass of the mixed slurry, and mix and stir for 80 minutes at a speed of 200r / min to prepare a modified slurry.

[0044] Step 3, filter the modified slurry ...

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PUM

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Abstract

The invention relates to a preparation method of hemp fiber sound insulation cotton, and belongs to the technical field of sound insulation material preparation. The preparation method comprises the following steps: taking hemp leaf residues and hemp stalks as raw materials to obtain plant fibers, mixing the plant fibers and ethyl silicate, dropwise adding alkaline water to react, calcining and grinding after the reaction is completed to obtain an initial body, finally mixing the initial body with an organic compound, fibers and other auxiliaries, hot-pressing, and drying to obtain the hemp fiber sound insulation cotton. According to the invention, fiber molecules in hemp are extracted and separated by adopting an acid soaking method, and then fiber tubes and fiber pores are filled with metal elementary substances, so that the mechanical strength and the aging resistance of the sound insulation cotton are improved; the ethyl silicate is mixed into the hemp fibers, so that the silicon dioxide grows on the rough surfaces of the hemp fibers, the hemp fibers have the stability and rigidity of the silicon dioxide, the mechanical strength, the flame retardance and the durability of the sound insulation cotton are further improved, and the sound insulation cotton has wide application prospects.

Description

technical field [0001] The invention relates to a preparation method of hemp fiber sound-proof cotton, which belongs to the technical field of sound-proof material preparation. Background technique [0002] Industrial hemp (Stevia rebaudiana Bertoni) is an annual dioecious herbaceous plant of the Cannabis genus, which is widely distributed all over the world. Cannabis genus plants in the world mainly include three species of wild cannabis (Cannabisruderalis Janisch), Indian cannabis (Cannabis indica Lam) and cultivated cannabis (Cannabis sativaL), and many cannabis varieties and subspecies have been produced in the long-term biological evolution process. Because cannabis contains a hallucinogenic and addictive secondary metabolite—tetrahydrocannabinol (THC), it has become one of the original drug plants well known to the public. In order to facilitate supervision and rational use, hemp varieties with THC content <0.3% in hemp are defined internationally as industrial hem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L67/00C08L33/26C08K3/36
CPCC08L97/02C08L2201/02C08L2205/03C08L2205/16C08L67/00C08L33/26C08K3/36Y02P20/54
Inventor 刘胜贵王钲霖蒋永昌付彬彬李智高孔令羽
Owner YUNNAN LVXIN BIOLOGICAL PHARMA CO LTD
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