Coffee grounds modified biodegradable composite material and preparation method and application thereof

A biodegradable and composite material technology is applied in the field of preparation of coffee grounds modified biodegradable composite materials, which can solve the problems of brittleness and high market price of materials, will not easily degrade, reduce the price of raw materials, etc. The effect of increasing the degradation rate and reducing the cost of the product

Inactive Publication Date: 2021-02-02
罗惠民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Polylactic acid degradable plastic is a kind of biodegradable plastic with good biodegradation effect, but under natural environmental conditions, when there is a lack of corresponding microorganisms, it will not be easily degraded. In addition, due to its brittleness and high material market price, it is urgently needed Modification and lower raw material prices

Method used

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  • Coffee grounds modified biodegradable composite material and preparation method and application thereof
  • Coffee grounds modified biodegradable composite material and preparation method and application thereof

Examples

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preparation example Construction

[0033] The preparation method of the coffee grounds modified biodegradable composite material comprises the following steps:

[0034] (1) Grinding the coffee grounds into nanoscale coffee grounds with nanoscale fineness in a grinder to obtain nanoscale coffee grounds;

[0035] (2) adding nanoscale coffee grounds, polylactic acid, biodegradable copolyester, compatibilizer, plasticizer and tackifier into a mixer by weighing the above-mentioned raw material ratio and uniformly mixing to obtain a compound;

[0036] (3) Add the homogeneously mixed mixture into a twin-screw extruder, and extrude the mixture at a preset extrusion temperature to obtain a biodegradable composite material modified with coffee grounds.

[0037] Polylactic acid (PLA) is a natural biodegradable plastic that has been industrially produced. Polylactic acid has excellent optical properties and high modulus, but its elongation at break, tear strength and breaking strength are all low. In order to overcome th...

Embodiment 1

[0046] A biodegradable composite material modified by coffee grounds, specifically, it is weighed and then mixed by the following raw materials according to the ratio of the above weight percentage, and the ratio is the weight ratio: polylactic acid 5%, poly (butyl adipate Glycol ester - butylene terephthalate copolymer) 70%, glycidyl methacrylate 5%, acetyl tri-n-butyl citrate 5%, maleic anhydride 5%, nano coffee grounds 10% .

[0047] The preparation method of the coffee grounds modified biodegradable composite material comprises the following steps:

[0048] (1) dehydrating, dehumidifying, and drying the waste residue produced after the coffee beans are ground and boiled in the dryer; grinding the dried coffee grounds into nano-scale coffee grounds with nano-scale fineness in the grinder;

[0049] (2) Nanoscale coffee grounds, polylactic acid, poly(butylene adipate-butylene terephthalate copolymer), glycidyl methacrylate, acetyl tri-n-butyl citrate, Maleic anhydride is we...

Embodiment 2

[0053] A biodegradable composite material modified by coffee grounds, specifically, it is made by weighing and then mixing the following raw materials according to the ratio of the above weight percentage, and the ratio is weight ratio: polylactic acid 12%, polybutylene succinate Alcohol ester 20%, ethanolamine 8%, epoxidized soybean oil 5%, maleic anhydride 5%, nano coffee grounds 50%.

[0054] The preparation method of the coffee grounds modified biodegradable composite material comprises the following steps:

[0055] (1) dehydrating, dehumidifying, and drying the waste residue produced after the coffee beans are ground and boiled in the dryer; grinding the dried coffee grounds into nano-scale coffee grounds with nano-scale fineness in the grinder;

[0056] (2) Weigh nanoscale coffee grounds, polylactic acid, polybutylene succinate, ethanolamine, epoxidized soybean oil, and maleic anhydride according to the above percentage by weight, and then add them to a high-speed mixer ...

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Abstract

The invention discloses a preparation method and application of a coffee grounds modified biodegradable composite material, and the coffee grounds modified biodegradable composite material is preparedby mixing the following raw materials in percentage by weight: 5-30% of polylactic acid, 20-70% of biodegradable copolyester, 5-20% of compatilizer, 5-15% of plasticizer, 5-15% of tackifier and 10-50% of nanoscale coffee grounds. The nano coffee grounds are adopted and cooperate with the synergistic effect of the polylactic acid, the biodegradable copolyester, the compatilizer, the plasticizer, the tackifier and the like to modify the biodegradable plastic and reduce the product cost so that full degradation of plastic products after use is facilitated, the coffee grounds are recycled, and the product cost is reduced.

Description

technical field [0001] The invention relates to the field of biodegradable technology, in particular to a preparation method and application of a biodegradable composite material modified with coffee grounds. Background technique [0002] At present, the application of plastics in real life is ubiquitous, and it is obvious to all that it is difficult to degrade and cause harm to the environment. With the improvement of public awareness of environmental protection, degradable plastics have been used to protect the human living environment. Currently degradable plastics polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polyhydroxyalkanoate (PHA), poly-β-hydroxybutyric acid (PHB), polymethylethylene carbonate Ester (PPC), etc. have begun to be popularized and applied, but due to the high cost of materials, they still lack competitiveness in specific applications. [0003] At present, there are mainly two types of modified degradable plastics on the market, sta...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L99/00C08L35/00C08K5/11
CPCC08L67/02C08L67/04C08L99/00C08L2201/06C08L2205/035C08L35/00C08K5/11C08L91/00C08K5/053
Inventor 罗惠民吴重秋罗嘉瑜
Owner 罗惠民
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