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Bio-based polyurethane with photothermal dual repair function and preparation method thereof

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

Active Publication Date: 2022-03-01
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 photothermal dual repair function and preparation method thereof
  • Bio-based polyurethane with photothermal dual repair function and preparation method thereof
  • Bio-based polyurethane with photothermal dual repair function and preparation method thereof

Examples

Experimental program
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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 in particular relates to a bio-based polyurethane with dual photothermal repair functions and a preparation method thereof. By introducing disulfide bond-containing small molecule alcohols or amines and cycloaddition monomer coumarin into the polyurethane system, the two are used as bio-based chain extenders or end-capping agents to improve their self-healing properties and mechanical properties. At the same time, the introduction of a carbon-based photothermal conversion agent into the system enables the bio-based polyurethane to achieve self-healing functions under heating or human-friendly multi-band light. The invention belongs to the self-repairing intelligent bio-based material, and the bio-based polyurethane with photothermal double repair function is prepared as a renewable material of bio-based source. The invention is mainly applicable to industries such as packaging materials, coatings, and elastomers. The preparation process is simple and environmentally friendly, and the restoration 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 Patents(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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