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A kind of rdp-coated nano attapulgite to prepare flame retardant polylactic acid composite material

A technology of nano-attapulgite and composite materials, which is applied in the field of RDP-coated nano-attapulgite to prepare flame-retardant polylactic acid composite materials, which can solve the problem that other properties of materials have not been significantly improved, and the effect of polymer materials is not obvious. and other problems, to achieve the effect of increasing the possibility of physical or chemical bonding, reducing the rate of thermal decomposition, and increasing the bonding area

Inactive Publication Date: 2016-04-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional surface treatment method of attapulgite can improve the mechanical properties of polymer materials to a certain extent, the effect is not obvious, and other properties of the material, especially the flame retardancy, have not been significantly improved.

Method used

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  • A kind of rdp-coated nano attapulgite to prepare flame retardant polylactic acid composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take by weighing 950g of polylactic acid pellets, RDP-coated nano-attapulgite 50g, mix the above pellets in a high-speed mixer, and add them to the extruder under the conditions of conventional feeding speed, temperature and screw speed. Extruding, cooling, and granulating, the RDP-coated nano-attapulgite flame-retardant polylactic acid composite material of the present invention is obtained. The limiting oxygen index is 23.5%, there is a droplet phenomenon, the carbon residue rate at 600°C is 3.83%, and the tensile strength is 91.76MPa.

Embodiment 2

[0029] Take by weighing 900g of polylactic acid pellets, 100g of RDP-coated nano-attapulgite, mix the above pellets in a high-speed mixer, and add them to the extruder under the conditions of conventional feeding speed, temperature and screw speed. Extruding, cooling, and granulating, the RDP-coated nano-attapulgite flame-retardant polylactic acid composite material of the present invention is obtained. The limiting oxygen index is 22.0%, there is no droplet phenomenon, the carbon residue rate at 600°C is 5.24%, and the tensile strength is 93.05MPa.

Embodiment 3

[0031] Take by weighing 850g of polylactic acid pellets, 150g of RDP-coated nano-attapulgite, mix the above pellets in a high-speed mixer, and add them to the extruder under the conditions of conventional feeding speed, temperature and screw speed. Extruding, cooling, and granulating, the RDP-coated nano-attapulgite flame-retardant polylactic acid composite material of the present invention is obtained. The limiting oxygen index is 22.5%, there is no droplet phenomenon, the carbon residue rate at 600°C is 9.33%, and the tensile strength is 82.85MPa.

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Abstract

The invention discloses an antiflaming polylactic acid composite material prepared by RDP (resorcinol diphenyl phosphate) coated nano attapulgite. The RDP coated nano attapulgite is prepared from RDP and nano attapulgite which are taken as raw materials under an ultrasonic condition. The antiflaming polylactic acid composite material is prepared by virtue of the following steps: mixing the polylactic acid and RDP coated nano attapulgite at a mass ratio of (60-95):(40-5) at a high speed, extruding by use of an extruder, cooling and prilling. The antiflaming polylactic acid composite material has a simple formula, is remarkably improved in mechanical property, has good antiflaming efficiency and good heat stability, can form a stable and compact carbon layer in burning, has no molten drops, and generates less smoke.

Description

technical field [0001] The invention relates to the technical field of flame retardancy of polylactic acid materials, in particular to an RDP-coated nano-attapulgite to prepare flame-retardant polylactic acid composite materials. Background technique [0002] Polylactic acid (PLA) is a completely degradable and environmentally friendly aliphatic polyester polymer material that uses natural renewable resources such as corn, wheat, and plant straw as raw materials, and can meet the requirements of sustainable development. However, polylactic acid has poor gas barrier properties, is flammable, and is accompanied by droplet phenomenon, which seriously limits its application in many fields such as electronic appliances and automobiles, which prompts people to study flame retardant modification of polylactic acid. [0003] In the actual flame retardant modification, the commonly used flame retardants of polylactic acid include intumescent flame retardants, nano flame retardants, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08K9/10C08K3/34
Inventor 王新龙居亚庆耿怡佳程翠珍李广敏
Owner NANJING UNIV OF SCI & TECH
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