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Preparation method of polylactic acid/nano jade powder mixture and high-speed mixing device thereof

A nano-jade powder, high-speed mixing technology, applied in rayon manufacturing, single-component polyester rayon, fiber chemical characteristics, etc., can solve the problems of large dust pollution, discoloration, complicated processes, etc., to avoid melting granulation process, the effect of avoiding degradation and discoloration, and avoiding agglomeration

Inactive Publication Date: 2020-06-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mixture of nano-jade powder and polylactic acid resin is mainly melted and extruded by twin-screw, cooled by a large amount of cooling water into strips, granulated by a pelletizer, and then dried for subsequent processing. In the process, polylactic acid is easy to degrade and change color, high energy consumption for mixing, large dust pollution, large investment in equipment, complicated process and other problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 70kg nano-polylactic acid in the mixing chamber of the high-speed mixing device, and close the door; 26kg of nano-jade powder, 0.1kg antioxidant and 0.5kg coupling agent are added to the powder silo of the high-speed mixing device; at 3000 rpm Under high-speed stirring for 10 minutes, the nano-jade powder and additives are gradually mixed with polylactic acid; under the heating power of 5KW, the system temperature reaches 135°C after 10 minutes, and is kept at this temperature for 20 minutes until all additives are uniformly coated. Embedding onto PLA pellets, stop mixing. The melt index MI of the obtained mixture was 10 g / 10 min (210° C.).

Embodiment 2

[0023] Add 75kg of nano polylactic acid in the mixing bin of the high-speed mixing device, and close the door of the bin; add 21.6 kg of nano-jade powder, 0.1 kg of antioxidant and 0.4 kg of coupling agent into the powder silo of the high-speed mixing device; at 3000 rpm Under high-speed stirring per minute, nano jade powder and additives are gradually mixed with polylactic acid; at a heating power of 3KW, the system temperature reaches 120°C after 10 minutes, and is kept at this temperature for 20 minutes until all additives are uniformly coated , Embedded on the polylactic acid particles, stop mixing. The melt index MI of the obtained mixture was 12 g / 10 min (210° C.).

Embodiment 3

[0025] Add 80kg of nano polylactic acid to the mixing chamber of the high-speed mixing device, and close the door; add 17.2kg of nano-jade powder, 0.1kg of antioxidant and 0.3kg of coupling agent into the powder silo of the high-speed mixing device; at 2500 rpm Under high-speed stirring per minute, nano-jade powder and additives are gradually mixed with polylactic acid; at a heating power of 3KW, the system temperature reaches 120°C after 10 minutes, and is kept at this temperature for 15 minutes until all additives are uniformly coated , Embedded on the polylactic acid particles, stop mixing. The melt index MI of the obtained mixture was 13g / 10min (210°C).

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Abstract

The invention relates to a preparation method of a polylactic acid / nano jade powder mixture. Nano jade powder, polylactic resin and other additives are mixed at a high speed in a high-speed mixing device; the temperature of the mixed system is raised to 70-140 DEG C by using a mixed heating or external heating method, so that polylactic acid is softened, the nano jade powder and other additives are uniformly coated and adhered on the polylactic acid resin, and polylactic acid resin particles are not severely adhered. The polylactic acid / nano jade powder mixture prepared by the invention can avoid thermal degradation and discoloration during melting and mixing of the polylactic acid.

Description

technical field [0001] The invention belongs to the field of polymer material preparation, and in particular relates to a preparation method of a polylactic acid / nano jade powder mixture and a high-speed mixing device thereof. Background technique [0002] Transformation of traditional polymer materials with nanotechnology and materials is a hot research topic at home and abroad. Polylactic acid is made from corn, wheat, sugar beet and other starchy agricultural products, which are fermented to produce lactic acid and then polymerized. Polylactic acid fiber is a kind of raw material that can be planted and is easy to plant, and the waste can be naturally degraded in nature of synthetic fibers. It can be decomposed into carbon dioxide and water by microorganisms in soil or seawater. When burned, it will not emit poisonous gas and cause pollution. It is a sustainable ecological fiber. The fabric has good hand feeling and drapability, anti-ultraviolet radiation, low flammabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K3/22C08K5/134C08K5/526D01F6/92D01F1/10
CPCC08K3/22C08K5/1345C08K5/526C08K2003/2227C08K2201/011C08K2201/013D01F1/10D01F6/92C08L67/04
Inventor 何勇王稚砚
Owner DONGHUA UNIV
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