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Preparation method of biodegradable composite material

A technology of biodegradable and composite materials, applied in the field of preparation of biodegradable composite materials, can solve the problems of thermal insulation performance and antibacterial performance without any contribution, impact strength and elongation at break cannot meet the needs and other problems, and achieve antibacterial properties. Excellent effect, easy to scale production, and strong fresh-keeping effect

Inactive Publication Date: 2021-03-12
杭州鹿扬科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The plant fiber-reinforced biodegradable composite material in this invention has good interface performance between plant fiber and polylactic acid, and it also has good tensile strength, but its impact strength and elongation at break cannot meet the requirements, and its No contribution to thermal insulation performance and antibacterial performance

Method used

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  • Preparation method of biodegradable composite material
  • Preparation method of biodegradable composite material
  • Preparation method of biodegradable composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1: a kind of food packaging material:

[0068] S110: Clean and dry the wheat straw, crush it until it passes through a 200-mesh sieve to obtain plant fiber powder, soak it in 2% sodium hydroxide solution at 35°C for 5 hours, filter it, wash it until the lotion is neutral, and dry it to obtain pretreatment plant fibres;

[0069] S120: Add 100g of pretreated plant fibers to 500mL of 80% ethanol solution, heat to 50°C under stirring at 300r / min to disperse evenly, add 1g of epithiosilane coupling agent represented by formula (1) and 0.3g of tridecafluorooctyl base trimethoxysilane, heated to 80°C for reflux reaction for 1 hour, filtered, washed with water until the lotion was neutral, and dried at 55°C to constant weight to obtain modified plant fibers;

[0070] S130: Ultrasonic dispersion of modified plant fiber with acetone, centrifugal washing three times, then adding toluene for ultrasonic dispersion, centrifugal washing three times, to obtain a toluene dis...

Embodiment 2

[0072] Embodiment 2: Another kind of food packaging material:

[0073] S110: Clean and dry corn stalks, crush them until they pass through a 200-mesh sieve to obtain plant fiber powder, soak them in 5% sodium hydroxide solution at 35°C for 5 hours, filter them, wash until the lotion is neutral, and dry them to obtain pretreatment plant fibres;

[0074] S120: Add 100g of pretreated plant fibers to 500mL of 75% ethanol solution, heat to 50°C under stirring at 300r / min to disperse evenly, add 0.6g of epithiosilane coupling agent represented by formula (1) and 0.6g of tridecafluoro Octyltriethoxysilane, heated to 82°C for reflux reaction for 1 hour, filtered, washed with water until the lotion was neutral, dried at 55°C to constant weight to obtain modified plant fibers;

[0075] S130: Ultrasonic dispersion of modified plant fiber with acetone, centrifugal washing three times, then adding toluene for ultrasonic dispersion, centrifugal washing three times, to obtain a toluene disp...

Embodiment 3

[0077] Embodiment 3: Another kind of food packaging material:

[0078] S110: same as S110 of embodiment 1;

[0079] S120: Add 100g of pretreated plant fibers to 500mL of 80% ethanol solution, heat to 50°C under stirring at 300r / min to disperse evenly, add 0.6g of epithiosilane coupling agent shown in formula (1), heat up to 80°C and reflux React for 1 hour, filter, wash with water until the lotion is neutral, and dry at 55°C to constant weight to obtain modified plant fibers;

[0080] S130: same as S130 of embodiment 1;

[0081] S140: Same as S140 in Embodiment 1.

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Abstract

The invention relates to the technical field of environment degradable composite materials, in particular to a preparation method of a biodegradable composite material. The preparation method comprises the following steps: cleaning plant fiber raw materials, drying, pulverizing, soaking in warm alkali liquor, filtering, washing until the washing liquor is neutral, and drying to obtain pretreated plant fiber; adding an episulfide silane coupling agent and a fluorosilane coupling agent into the ethanol solution of the pretreated plant fibers, and carrying out a heating reflux reaction to obtainmodified plant fibers; preparing methylbenzene dispersion liquid of the modified plant fibers, adding lactide and a catalyst, and reacting to obtain the biodegradable composite material. According tothe preparation method of the biodegradable composite material, agricultural waste is used as a raw material, the cost is low, the biodegradable composite material can be naturally and completely biodegraded after being used, environmental pollution cannot be caused, and the composite material has an excellent antibacterial effect and weather resistance after being optimized and modified.

Description

technical field [0001] The invention relates to the technical field of environmentally degradable composite materials, in particular to a preparation method of biodegradable composite materials. Background technique [0002] With the modernization and development of industry, while enriching people's life, great material resources have produced such as construction waste, electronic product waste, chemical waste and white pollution in the usual sense. Among the above waste, metals such as copper, iron, zinc and aluminum Except for a few items such as paper and paper that can be recycled, most of the rest of the garbage and waste are disposed of by landfill, incineration, etc. In the process of disposal, some resources are inevitably wasted and pollution of water sources and air is generated. Among them, plastic packaging materials, which account for a huge proportion, are especially polluting to the environment. Their incineration has huge environmental pollution, while land...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H8/00C08G63/08C08G63/78B65D65/46A01N55/10A01P3/00A01P1/00
CPCA01N55/00B65D65/466C08G63/08C08G63/78C08H8/00Y02W90/10
Inventor 不公告发明人
Owner 杭州鹿扬科技有限公司
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