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Preparation method of modified hemp stalk core/polyethylene composite particle master batch

A technology of hemp stalk core and composite granules, which is applied in the field of preparation of modified hemp stalk core/polyethylene composite granule masterbatch, can solve problems such as variability, achieve improved interface performance, simple manufacturing process, and scientific and reasonable formula Effect

Pending Publication Date: 2020-11-06
HEILONGJIANG HEIKE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fibers contained in the hemp core have the disadvantage of variability and require surface treatment to improve the mechanical properties of their composites with thermoplastic, thermoset and biodegradable matrices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Example 1: Place the hemp stalk core in 10% sodium hydroxide solution, soak for 4 hours, remove part of the lignin, hemicellulose and pectin filled between the cellulose, and separate the fiber bundles and fibrillate; Dry in the sun for 10 hours to completely remove the moisture contained in the pretreated hemp stalk core; grind the dried hemp stalk core in a grinder; take out a certain amount of distilled water as a solvent of silane coupling agent A171 solution, Use acetic acid to adjust the pH value of the solution to 4, place the hemp stalk core particles in the above solution, and fully mix and stir for 2 hours to make it hydrolyze, condense, form hydrogen bonds and form covalent bonds to improve its interface properties. After the modification treatment, use a sawdust dryer to dry the pressed hemp stalk core particles; place a certain amount of polyethylene powder in a heat mixer, and stir for 30 minutes at 60°C; then weigh an appropriate amount of modified Add pe...

example 2

[0016] Example 2: Place the hemp stalk core in 20% sodium hydroxide solution, soak for 6 hours, remove part of the lignin, hemicellulose and pectin filled between the cellulose, and separate the fiber bundles and fibrillate; Dry in the sun for 14 hours to completely remove the moisture contained in the pretreated hemp stalk core; grind the dried hemp stalk core in a grinder; take out a certain amount of distilled water as a solvent of silane coupling agent A171 solution, Use acetic acid to adjust the pH value of the solution to 6, place hemp stalk core particles in the above solution, and mix and stir for 4 hours to make it undergo hydrolysis, condensation, hydrogen bond formation, and covalent bond formation to improve its interface properties. After the modification treatment, use a sawdust dryer to dry the pressed hemp stalk core particles; place a certain amount of polyethylene powder in a heat mixer, and stir for 30 minutes at 80°C; then weigh an appropriate amount of modi...

example 3

[0017] Example 3: place the hemp stalk core in 15% sodium hydroxide solution, soak for 5 hours, remove part of the lignin, hemicellulose and pectin filled between the cellulose, and separate the fiber bundles and fibrillate; Dry in the sun for 12 hours to completely remove the moisture contained in the pretreated hemp stalk core; grind the dried hemp stalk core in a grinder; take out a certain amount of distilled water as a solvent of silane coupling agent A171 solution, Use acetic acid to adjust the pH value of the solution to 5, place hemp stalk core particles in the above solution, and fully mix and stir for 3 hours to make it undergo hydrolysis, condensation, hydrogen bond formation, and covalent bond formation to improve its interface properties. After the modification treatment, use a sawdust dryer to dry the pressed hemp stalk core particles; place a certain amount of polyethylene powder in a heat mixer, and stir for 30 minutes at 70°C; then weigh an appropriate amount o...

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PUM

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Abstract

The invention relates to a preparation method of a modified hemp stalk core / polyethylene composite particle master batch. The preparation method mainly comprises the following steps of: hemp stalk core pretreatment, drying treatment, hemp stalk core crushing treatment, hemp stalk core modification treatment, extrusion granulation of a modified hemp stalk core and polyethylene composite material, and the like. The surface modification design is carried out on the hemp stalk core, and the modified hemp stalk core and polyethylene are subjected to extrusion processing treatment, so that the purpose of obtaining the modified hemp stalk core / polyethylene composite material particles with excellent performance is achieved; and meanwhile, the preparation method has the characteristics of simplifying the production and processing technology, reducing the manufacturing cost and improving the utilization rate.

Description

technical field [0001] The invention belongs to the field of material modification and material processing and preparation, and in particular relates to a preparation method of a modified hemp stalk core / polyethylene composite granule masterbatch. Background technique [0002] With the deteriorating ecological environment and white pollution becoming more and more serious, environmental protection issues have become the focus of scientific researchers. Due to its renewable and low-pollution characteristics, natural fibers have been paid more and more attention in today's society, and composite materials prepared from natural fibers as reinforcements have also received extensive attention. Due to the characteristics of low density, high specific modulus and high specific strength, hemp stalk core is widely used in the production and processing of composite materials as a reinforcing material. [0003] The hemp stalk core refers to the central stalk core left after the hemp s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/06B29C48/92C08L23/06
CPCB29B9/06B29C48/92B29C2948/92704C08L23/06C08L1/02C08K5/14C08K5/5425C08K5/521C08K5/09C08K5/13C08K5/57
Inventor 姜振生
Owner HEILONGJIANG HEIKE TECH CO LTD