Polyurethane modified carbon nanotube/PLA/PBAT composite material containing sulfonic acid ionic liquid element

An ionic liquid and composite material technology is applied in the field of polyurethane modified carbon nanotube/PLA/PBAT composite material and its preparation, which can solve the problems of low elongation at break and the inability to reach the application range of PLA composite material.

Active Publication Date: 2021-12-31
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the patent CN110396286A, PLA-g-TPU compatibilizer (PUG) is prepared by adding 5-40 parts of thermoplastic polyurethane (TPU), which increases the compatibility of PLA and TPU, and improves the toughness of PLA-based composite materials, for example, By adding 10 parts of PUG, the elongation at break of the PLA/TPU composite material reaches 10%-35% when adding

Method used

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  • Polyurethane modified carbon nanotube/PLA/PBAT composite material containing sulfonic acid ionic liquid element
  • Polyurethane modified carbon nanotube/PLA/PBAT composite material containing sulfonic acid ionic liquid element
  • Polyurethane modified carbon nanotube/PLA/PBAT composite material containing sulfonic acid ionic liquid element

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Experimental program
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Effect test

Embodiment 1

[0027] This embodiment prepares polyurethane (PU-IL) modified carbon nanotube / PLA / PBAT composites containing a sulfonic acid ionic liquid primary according to the following steps:

[0028] (1) 2.5 g of hyeta dikyl alcohol is added to the three flasks, placed in a 150 ° C oil bath, vacuum 30min to remove water, add 5 ml of dimethyl sulfoxide and stirred to polycapric acid The butanediol is dissolved, then 0.222 g of IPDI is slowly added, and 0.2 ml of catalyst DBTDL was added dropwise, and the preservation polymerization was continued for 0.5 hours.

[0029] (2) In another three flask, 2.5 g of polylactide polyol is added, placed in a 150 ° C oil bath, vacuum 30min to remove water, add 5 ml of dimethyl sulfoxide, and stir it to polyolsolycyl ester polyol dissolution. Then, 0.222 gIPDI was slowly added, and 0.2 ml of catalyst DBTDL was added dropwise, and the reaction polymerization was continued for 0.5 hours.

[0030] (3) Add the solution of step (1) to the solution of step (2),...

Embodiment 2

[0035] This embodiment prepares a PU-IL modified carbon nanotube / PLA / PBAT composite according to the following steps:

[0036] (1) 2.5 g of hyeta dikyl alcohol is added to the three flasks, placed in a 150 ° C oil bath, vacuum 30min to remove water, add 5 ml of dimethyl sulfoxide and stirred to polycapric acid The butanediol is dissolved, then 0.222 g of MDI is slowly added, and 0.2 ml of catalyst DBTDL was added dropwise, and the preservation polymerization was continued for 0.5 hours.

[0037] (2) In another three flask, 2.5 g of polylactide polyol is added, placed in a 150 ° C oil bath, vacuum 30min to remove water, add 5 ml of dimethyl sulfoxide, and stir it to polyolsolycyl ester polyol dissolution. Then, 0.222 g of MDI was slowly added, and 0.2 ml of catalyst DBTDL was added dropwise, and the preservation polymerization was continued for 0.5 hours.

[0038] (3) Add the solution of step (1) to the solution of step (2), then add 1.065 g n, N-neiteriol pair (N-methylimidazo...

Embodiment 3

[0043] This embodiment prepares a PU-IL modified carbon nanotube / PLA / PBAT composite according to the following steps:

[0044] (1) 2.5 g of hyeta dikyl alcohol is added to the three flasks, placed in a 150 ° C oil bath, vacuum 30min to remove water, add 5 ml of dimethyl sulfoxide and stirred to polycapric acid The butanediol is dissolved, then 0.222 g of TDI is slowly added, and 0.2 ml of catalyst DBTDL was added dropwise, and the preservation polymerization was continued for 0.5 hours.

[0045] (2) In another three flask, 2.5 g of polylactide polyol is added, placed in a 150 ° C oil bath, vacuum 30min to remove water, add 5 ml of dimethyl sulfoxide, and stir it to polyolsolycyl ester polyol dissolution. 0.222 g of Tdi was then slowly added, and 0.2 ml of catalyst DBTDL was added dropwise, and the preservation polymerization was continued for 0.5 hours.

[0046] (3) Add the solution of step (1) to the solution of step (2), then add 1.065 g n, N-neiteriol pair (N-methylimidazol...

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Abstract

The invention discloses a polyurethane modified carbon nanotube/PLA/PBAT composite material containing a sulfonic acid ionic liquid element. The raw material formula of the composite material comprises 0.4-2% of polyurethane containing the sulfonic acid ionic liquid element, 36-57% of PLA, 36-57% of PBAT and 6-8% of a carbon nanotube. In the invention, the interface of the PLA and the PBAT is compatibilized by the polyurethane containing the sulfonic acid ionic liquid element so as to improve the compatibility, the PBAT plays a role in toughening the PLA so as to enhance the mechanical property of the composite material, and meanwhile, an imidazole group in the polyurethane containing the ionic liquid element can promote the dispersion compatibility of the carbon nanotubes and improve the electromagnetic shielding property of the composite material; and the composite material has good electromagnetic shielding performance and mechanical property, is environment-friendly and easy to process, and has excellent practical value.

Description

Technical field [0001] The present invention relates to the field of PLA composites, and more particularly to polyurethane modified carbon nanotubes / PLA / PBAT composites thereof and preparation methods thereof. Background technique [0002] The PLA is a biodegradable material, which has good biocompatibility, which not only completely degrades, but also its degradation product does not contaminate the environment. Plant from plants, in line with its environmentally friendly, high tensile strength, good thermostability, good anti-solvent, easy to process, widely used in plastics industry, medical field, agriculture and automotive manufacturing . However, the PLA toughness is low, and it needs to be touched to support mechanical properties. PBAT is regarded as an ideal toughening agent for a PLA composite, but due to its poor compatibility, the PBAT is greatly limited due to phase separation due to its poor compatibility. Tough effect, therefore, a compatibilizer is developed to...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L75/06C08K3/04C08G18/66C08G18/42C08G18/38C08G18/83
CPCC08L67/04C08L67/02C08G18/428C08G18/4238C08G18/4202C08G18/3848C08G18/6633C08G18/831C08L2205/05C08L2205/08C08K2201/011C08L75/06C08K3/041
Inventor 徐佩黄彬城王平严彤丁运生
Owner HEFEI UNIV OF TECH
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