Liquefied carapace/degradable plastic blending film and preparation method thereof

A technology for degrading plastics and carapaces, applied in the field of polymer materials, can solve the problems of near-shore and coastal environmental pollution, waste of resources, etc., and achieve good mechanical properties and improve mechanical properties.

Active Publication Date: 2019-01-11
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, seafood waste is only used to produce low-value-added products such as feed and fertilizer, and some of them are even discarded directly as waste. This not only wastes resources, but also causes serious pollution to the near-shore and coastal environments.

Method used

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  • Liquefied carapace/degradable plastic blending film and preparation method thereof

Examples

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preparation example Construction

[0021] A preparation method of carapace liquefied matter / degradable plastic blend film, comprising the following steps:

[0022] Step S1: Stir the acid catalyst, carapace powder and polyol liquefier in a certain proportion at a temperature of 140°C to 170°C for 100-120 minutes, then quench it in an ice bath, wash the resulting mixture with anhydrous ethanol detergent After washing and stirring for 5-10h, filter to remove the residue to obtain a liquid mixture.

[0023] Wherein, the amounts of the acid catalyst, the shell powder and the polyol liquefier are calculated in parts by mass: 0.5-1 part of the acid catalyst, 0.5-5 parts of the shell powder, and 10-18 parts of the polyol liquefaction agent.

[0024] The above-mentioned acid is one or more of concentrated sulfuric acid, concentrated hydrochloric acid, concentrated nitric acid, formic acid and acetic acid; the polyhydric alcohol is one or both of diethylene glycol (DEG) and glycerol.

[0025] In this step, shell powder ...

Embodiment 1

[0064] Put 4g of ball-milled pretreated carapace, 2g of sulfuric acid and 28g of diethylene glycol into a 100ml three-necked flask with a condensing device, put it into an oil bath, and stir and react at a temperature of 160°C for 120min. After reaching the reaction time, quickly put the flask into an ice bath to quench the reaction, use absolute ethanol as a lotion to wash out the reacted mixture, filter it with a Buchner funnel, and remove the residue; Steam (0.6mbar, 100°C, 1h) to remove the lotion and unreacted liquefaction agent diethylene glycol to obtain the real carapace liquefaction. Put 0.08g of carapace liquefaction and 39.92g of 5wt% PVA solution at 60°C and stir for 2 hours, then let it stand for defoaming; pour the blended film solution on the glass plate model, and lay the film by room temperature casting method , The curing time is 48h, after cleaning the surface of the cured film with ethanol, let it dry naturally.

[0065] The obtained carapace liquefaction / ...

Embodiment 2

[0072] Put 4g of ball-milled pretreated carapace, 2g of sulfuric acid and 28g of diethylene glycol into a 100ml three-necked flask with a condensing device, put it into an oil bath, and stir and react at a temperature of 160°C for 120min. After reaching the reaction time, quickly put the flask into an ice bath to quench the reaction, use absolute ethanol as a lotion to wash out the reacted mixture, filter it with a Buchner funnel, and remove the residue; Evaporation (the rotary evaporation conditions of this embodiment and the following examples are all the same as in Example 1) removes lotion and unreacted liquefier diethylene glycol to obtain real carapace liquefaction. Change the amount of carapace liquefaction, put 0.16g of carapace liquefaction and 39.84g of 5wt% PVA solution at 60°C and stir for 2h, then let it stand for defoaming; pour the blended film solution on the glass plate model , the room temperature casting method was used to spread the film, and the curing tim...

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Abstract

The invention discloses a liquefied carapace / degradable plastic blending film and a preparation method thereof. The preparation method comprises the following steps: performing liquefaction reactionon an acid catalyst, carapace powder and polyhydric alcohol liquor at a certain ratio at a temperature of 140-170 DEG C; after the ending of reaction, using a lotion for washing the mixture acquired from the reaction and removing residues, thereby acquiring a liquid mixture; adopting a rotary evaporation method for removing the lotion and unreacted polyhydric alcohol liquor in the liquid mixture,thereby acquiring the liquefied carapace; stirring and mixing the liquefied carapace and a degradable plastic solution at a certain ratio at a temperature of 50-70 DEG C, thereby acquiring a mixed solution of the liquefied carapace and the degradable plastic solution; curing the mixed solution into a film; using a polar micro-molecular solvent for cleaning the cured film and then naturally airing.The liquefied carapace -based blending film prepared by taking raw carapace as the main raw material according to the invention has excellent heat resistance, mechanical property, antibacterial property, environment-friendly property, excellent film texture and suitability for packaging materials.

Description

technical field [0001] The invention relates to the field of polymer materials, and more specifically relates to a carapace liquefied / degradable plastic blend film and a preparation method thereof. Background technique [0002] At present, the packaging materials on the market are mainly made of fossil raw materials, but due to the non-renewability of petroleum resources and the non-degradability of petrochemical products, the resulting "white pollution" problem cannot be ignored, and it is urgent to find a degradable , Renewable substitutes to make packaging materials, there is an urgent need to develop and explore sustainable new energy sources. As the only widespread carbon source besides petroleum and coal, biomass resources are considered to be the best petroleum substitutes due to their renewable nature. Chitin widely exists in seafood waste shrimp and crab shells. It is the most abundant nitrogen-containing organic polymer in nature and the second largest biomass res...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L5/08C08J5/18
CPCC08J5/18C08J2329/04C08J2405/08
Inventor 张玉苍许文茸郑凤昳
Owner HAINAN UNIVERSITY
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