Starch and polyadipic acid composite material and preparation method thereof

A technology of polyadipate and composite materials, which is applied in the field of starch and polyadipate composite materials and their preparation, can solve the problems of long time consumption, large water consumption and labor intensity of cast film forming method, and avoid water pollution. The effect of large consumption, reduction of material cost, and environmental protection

Pending Publication Date: 2021-07-23
杜晓磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved of the present invention is to provide a kind of starch and polyadipate composite material and its preparation method, to solve the problem that PLA is easy to cause environmental pollution in the prior art center, and the cast film forming method has a large amount of water and energy consumption. Problems of high consumption, time-consuming and labor-intensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A starch and polyadipate composite material, comprising the following components by mass fraction: 45 parts of PBAT, 55 parts of cornstarch, 20 parts of water, 30 parts of bismethylolurea, 1.5 parts of graphene oxide and Tween 80 0.2 parts.

[0027] Add PBAT, cornstarch, and bishydroxymethylurea to water and mix, heat and stir until fully mixed. Graphene oxide and Tween 80 were added to the obtained solution, and stirred at 100° C. for 40 min. Finally, the material was cooled for 15 hours, put into a screw granulator and melt-extruded at 3000 r / min and 180°C.

Embodiment 2

[0029] A composite material of starch and polyadipate, comprising the following components by mass fraction: 64 parts of PBAT, 36 parts of rice starch, 15 parts of water, 30 parts of monomethylol urea, 0.6 part of bio-based graphene and PVP 0.6 parts.

[0030] Add PBAT, rice starch, and monohydroxymethylurea into water and mix, heat and stir until fully mixed. Add bio-based graphene and PVP into the resulting solution, and stir at 80°C for 45min. Finally, the material was cooled for 12 hours, put into a screw granulator and melted and extruded at 3000 r / min and 150°C.

Embodiment 3

[0032] A kind of starch and polyadipate composite material, by mass fraction, comprises following components: PBAT 70 parts, sweet potato starch 30 parts, water 18 parts, solid liquid plasticizer 20 parts, hydrophobically modified graphene 0.5 part and 1 part of dibutyltin oxide. Wherein, the solid liquid plasticizer includes monomethylolurea and ethanolamine, and the proportion of ethanolamine in the solid liquid composite plasticizer is 45%wt.

[0033] Add PBAT, sweet potato starch, and solid-liquid plasticizer into water and mix, heat and stir until fully mixed. Add hydrophobically modified graphene and dibutyltin oxide into the obtained solution, and stir at 90° C. for 35 minutes. Finally, the material was cooled for 14 hours, put into a screw granulator and melted and extruded at 3000r / min and 150°C.

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PUM

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Abstract

The invention discloses a starch and polyadipic acid composite material, which comprises the following components in percentage by mass: PBAT, starch, water, a plasticizer, a modifier and a dispersant. The invention also discloses a preparation method of the starch and polyadipic acid composite material. The starch and polyadipic acid composite material disclosed by the invention has the beneficial effects that the food-grade starch is taken as a main raw material, no harmful chemical additive is used, a product is attractive, no three wastes are generated in a production process, and a degraded product is abandoned in nature after being used and can be completely decomposed and fused with soil, so that the environment is effectively protected; according to the starch and polyadipic acid composite material disclosed by the invention, PLA is omitted in the aspect of raw material selection, the material cost of the whole composite material is reduced, and meanwhile, the problems of high water consumption, high energy consumption, long time consumption and high labor intensity in a film casting method are solved by adopting a melt extrusion method.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a starch and polyadipic acid composite material and a preparation method thereof. Background technique [0002] With the increasing severity of "white pollution", global environmental protection has been strengthened, and more than 60 countries have implemented "plastic restriction". my country has encouraged the popularization and application of degradable plastics since 2004, implemented "plastic restriction" in 2008, and officially promulgated the "plastic ban order" on January 1, 2021. At present, most of the degradable and environmentally friendly materials use PLA (polylactic acid) or paper materials, but these materials have disadvantages such as high cost and poor user experience, which cannot meet the current society's demand for environmentally friendly material products. Therefore it is necessary to invent a new type of fully degradable environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L67/02C08K3/04
CPCC08L3/02C08L67/02C08L2201/06C08K3/042
Inventor 杜晓磊
Owner 杜晓磊
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