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Bio-based polyurethane with photo-thermal dual-repairing function and preparation method thereof

A polyurethane and bio-based technology, which is applied in the field of bio-based polyurethane and its preparation, can solve problems such as poor mechanical properties and achieve a good repair effect

Active Publication Date: 2021-02-02
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention proposes a bio-based polyurethane and its preparation method that can realize the repair function in the actual range of most light bands and heating conditions, and solves the single condition that most self-healing polyurethane can only be heated Technical problems such as self-repair and poor mechanical properties after repair

Method used

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  • Bio-based polyurethane with photo-thermal dual-repairing function and preparation method thereof
  • Bio-based polyurethane with photo-thermal dual-repairing function and preparation method thereof
  • Bio-based polyurethane with photo-thermal dual-repairing function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]Take 6.00 g of polytetrahydrofuran (the hydroxyl value is between 100-120 mgKOH / g, Mn=1000) dissolved in 2 ml of N, N-dimethylformamide after dehydration treatment at 100 ° C for 3 hours, and repeatedly treat it in vacuum and nitrogen In three 100ml three-neck flasks, add isophorone diisocyanate (4g), then add dibutyltin dilaurate (0.018g) dissolved in 2ml N,N-dimethylformamide, and react at 80°C for 2h to obtain a viscous isocyanate-terminated polyurethane prepolymer PU-1; add L-cystine (1.44g) dissolved in 3.5ml N,N-dimethylformamide, and react at 45°C for 1h to obtain viscous disulfide-containing The isocyanate-terminated polyurethane PU-2 of the bond; then add 4-methylumbelliferone (2.11g) dissolved in 2.5ml N,N-dimethylformamide, and react at 40°C for 1h to obtain a viscous Sulfur-bonded coumarin derivative monomer-capped polyurethane PU-3; weigh 2g of nano-scale graphite powder, add graphite to 2ml of absolute ethanol with a content ≥99.7%, and then ultrasonically ...

Embodiment 2

[0039] Take 6.00 g of polytetrahydrofuran (the hydroxyl value is between 100-120 mgKOH / g, Mn=1000) dissolved in 2 ml of N, N-dimethylformamide after dehydration treatment at 100 ° C for 3 hours, and repeatedly treat it in vacuum and nitrogen In three 100ml three-neck flasks, add isophorone diisocyanate (4g), add dibutyltin dilaurate (0.018g) dissolved in 2ml N,N-dimethylformamide, and react at 80°C for 2h to obtain a viscous Isocyanate-terminated polyurethane prepolymer PU-1; add 4,4'-diaminodiphenyl disulfide (1.49 g) dissolved in 3.5 ml N, N-dimethylformamide, and react at 40 ° C for 1 h to obtain Viscous disulfide bond-containing isocyanate-terminated polyurethane PU-2; add 4-methylumbelliferone (2.11g) dissolved in 2.5ml N, N-dimethylformamide, and react at 40°C for 1h to obtain Viscous disulfide bond-containing coumarin derivative monomer-terminated polyurethane PU-3; weigh 2g of nano-scale graphite powder, add graphite to 2ml of absolute ethanol with a content ≥ 99.7%, a...

Embodiment 3

[0044] Take 11.46g of polytetrahydrofuran (Mn=2000) dissolved in 2ml of N,N-dimethylformamide after dehydration treatment at 100°C for 3 hours, and put it into a 100ml three-necked flask that has been repeatedly treated with vacuum and nitrogen for three times, and add Isophor Ketone diisocyanate (3.82g), add dibutyltin dilaurate (0.033g) dissolved in 2ml N, N-dimethylformamide, and react at 85°C for 2h to obtain viscous isocyanate-terminated polyurethane prepolymer PU -1; add L-cystine (1.38g) dissolved in 3.5ml N,N-dimethylformamide, and react at 40°C for 1h to obtain viscous disulfide-bonded isocyanate-terminated polyurethane PU-2 ; Add 4-methylumbelliferone (2.02g) dissolved in 2.5ml N, N-dimethylformamide, and react at 45°C for 1h to obtain viscous disulfide bond-containing coumarin derivative monomer-terminated Polyurethane PU-3; Weigh 2g of nanoscale graphene powder, add graphene to 2ml of absolute ethanol with a content ≥ 99.7%, then ultrasonically treat it in an ultra...

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Abstract

The invention belongs to the technical field of preparation of degradable bio-based functional materials, and particularly relates to bio-based polyurethane with a photo-thermal dual-repairing function and a preparation method thereof. According to the invention, disulfide bond-containing small molecular alcohol or amine and cycloaddition monomer coumarin are introduced into a polyurethane system,and the disulfide bond-containing small molecular alcohol or amine and cycloaddition monomer coumarin are used as a bio-based chain extender or an end-capping reagent, such that self-repairing performance and mechanical properties of the polyurethane system are improved. Meanwhile, a carbon photothermal conversion agent is introduced into the system, so that the bio-based polyurethane can realizea self-repairing function under heating or human-friendly multi-band illumination. The invention belongs to a self-repairing intelligent bio-based material, and a renewable material taking bio-basedpolyurethane with a photo-thermal dual-repairing function as a bio-based source is prepared. The method is mainly suitable for packaging materials, coatings, elastomers and other industries, the preparation process is simple and environmentally friendly, and the repairing effect is obvious and efficient.

Description

technical field [0001] The invention belongs to the technical field of preparation of degradable bio-based functional materials, and in particular relates to a bio-based polyurethane with dual photothermal repair functions and a preparation method thereof. Background technique [0002] Polyurethane refers to a synthetic polymer with urethane repeating units in the polymer backbone. It is one of the most commonly used materials for preparing coatings and has excellent acid resistance and low temperature resistance. Due to the designability of molecular structure, polyurethane materials not only play an irreplaceable role in traditional fields such as foams, medical equipment, adhesives / sealants, coatings, and damping materials, but also play an irreplaceable role in artificial skin, flexible sensors, smart biological switches, and new storage systems. It plays a pivotal role in emerging high-tech fields such as energy materials and aerospace, and is known as "universal polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/38C08G18/28C08G18/10C08K3/04
CPCC08G18/6685C08G18/4854C08G18/10C08K3/04C08K2201/011C08G18/3863C08G18/2845
Inventor 李锦春王璐瑶李宁叶历殷鹏张昊高鑫李嘉诚林学昊张钰茜
Owner CHANGZHOU UNIV
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