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Biodegradable composite material and its preparation method and application

A composite material and biodegradable technology, applied in the field of biodegradable composite materials and their preparation, can solve problems such as poor resin strength, and achieve the effects of good hydrophobicity, low water absorption, and good biodegradability

Active Publication Date: 2019-05-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, epoxidized soybean oil, as an industrialized product, has been widely studied in the preparation of new materials, especially the preparation of thermosetting resins, but the problem of poor resin strength is still common.

Method used

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  • Biodegradable composite material and its preparation method and application
  • Biodegradable composite material and its preparation method and application
  • Biodegradable composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The present embodiment provides a kind of biodegradable composite material, and its preparation method comprises the following steps:

[0044] (1) Preparation of plant fiber base material: the sisal fiber with about 1 cm long is pretreated with steam explosion to destroy its bundle structure, and obtain the steam-exploded sisal fiber ( Steam explosionsisal fiber, SESF). Put SESF in water and disperse evenly at high speed with a high-shear disperser. The mass ratio of SESF to water is 1:100. Finally, carry out suction filtration and drying to obtain a SESF substrate with a thickness of 0.5 mm.

[0045] (2) Preparation of ESOCA prepolymer: Take 4 parts of CA (citric acid) and dissolve it in 1 part of deionized water at 90°C, add ESO (epoxidized soybean oil) after the CA is completely dissolved, and mix the blend at 90°C Stir at ℃ for 15 minutes to obtain a translucent prepolymer, and finally add acetone to the cooled prepolymer to obtain a solution of ESOCA prepolymer wi...

Embodiment 2

[0048] This embodiment provides a biodegradable composite material, the preparation method of which is basically the same as that of embodiment 1, except that the mass ratio of ESOCA prepolymer and SESF substrate is controlled to be 0.4:1, other steps and parameters are consistent with embodiment 1, The mass percentage of the ESOCA resin in the prepared composite material is 28.6% (ie the mass percentage of the plant fiber substrate is 71.4%), which is recorded as SESF / ESOCA28.6.

Embodiment 3

[0050] This embodiment provides a biodegradable composite material, the preparation method of which is basically the same as that of embodiment 1, except that the mass ratio of ESOCA prepolymer and SESF substrate is controlled to be 0.8:1, and other steps and parameters are consistent with embodiment 1. The mass percentage of the ESOCA resin in the prepared composite material is 44.4% (ie the mass percentage of the plant fiber substrate is 55.6%), which is recorded as SESF / ESOCA44.4.

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Abstract

The invention relates to a composite material capable of realizing biodegradation, and a preparation method and application thereof. The preparation method of the composite material comprises the following steps: preprocessing plant fiber raw materials to damage the fascicle-like structure of the plant fiber raw material; obtaining a plant fiber of which the draw ratio is 400-1000; then, putting the plant fiber in water, carrying out high-shearing, dispersing evenly, carrying out suction filtration and drying to obtain a plant fiber base material; dissolving a curing agent in first solvent, then, adding epoxidized soybean oil, heating, stirring, cooling, and adding second solvent to obtain epoxidized soybean oil prepolymer solution; blending the epoxidized soybean oil prepolymer solution with the plant fiber base material, volatilizing the solvent to obtain blends; procuring the blends in the mould, and then, curing to obtain the composite material. The composite material prepared with the preparation method has the advantages of good biodegradability and good tensile strength, hydrophobicity and thermostability.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a biodegradable composite material and its preparation method and application. Background technique [0002] In the case of resource crisis and environmental pollution brought by petroleum-based packaging materials, the study of new environmentally friendly biodegradable packaging materials has become an important subject area for researchers. Scholars at home and abroad have also conducted a lot of research on this and achieved great results more research results. Among them, the representative packaging materials made of plant fiber include corrugated paper, honeycomb paper, plant fiber / starch composite material, plant fiber / plastic composite material, pulp molding, cellulose film, etc. These materials are mainly made of waste Paper fibers, pulp, and crop straws are processed and formed by foaming, extrusion, hot pressing, and casting techniques as raw materials. They have g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L97/02C08L63/00B65D65/46C08G59/42
CPCB65D65/466C08G59/42C08L1/02C08L97/02C08L2201/06C08L2205/16C08L63/00Y02W90/10
Inventor 冯彦洪雷波瞿金平何和智
Owner SOUTH CHINA UNIV OF TECH
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