Self-healing anti-aging controllable degradable polyurethane as well as preparation method and application thereof

An anti-aging and self-healing technology applied in the field of polyurethane to achieve controllable degradation, simple process and excellent mechanical properties

Active Publication Date: 2021-02-26
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, it is an urgent need to prepare a self-healing, anti-aging and controllable degradation polyurethane for electronic skin. So far,

Method used

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  • Self-healing anti-aging controllable degradable polyurethane as well as preparation method and application thereof
  • Self-healing anti-aging controllable degradable polyurethane as well as preparation method and application thereof
  • Self-healing anti-aging controllable degradable polyurethane as well as preparation method and application thereof

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preparation example Construction

[0049] Another aspect of the embodiments of the present invention also provides a method for preparing the self-healing anti-aging controllable degradation polyurethane, which includes:

[0050] Under a protective atmosphere, the mixed reaction system comprising polydiol, isocyanate, chain extender, catalyst, isocyanate and solvent is reacted at 25-100°C for 1-48 hours to prepare self-healing anti-aging controllable degradation polyurethane.

[0051] In some more specific embodiments, the preparation method specifically includes:

[0052] In a protective atmosphere, mix polyglycol, isocyanate, chain extender, catalyst and solvent and heat at 25-100°C until completely dissolved, then add isocyanate to form the mixed reaction system, and control the reactant in the mixed reaction system The concentration is 10-50 wt%, and then reacted at 25-100° C. for 1-48 hours, and then after-treatment to obtain the self-healing anti-aging controllable degradable polyurethane.

[0053] Furth...

Embodiment 1

[0070] In a glove box filled with 99.999% Ar, fresh polybutylene adipate diol, polycaprolactone diol, bis(4-hydroxyphenyl) disulfide, dibutyltin dilaurate and Tetrahydrofuran is added to a three-neck reactor equipped with a mechanical stirrer for a one-step reaction, wherein [polybutylene adipate diol + polycaprolactone diol] / [bis(4-hydroxyphenyl) diol] Sulfur ether]=1 / 99 (mass ratio), the molecular weight of polybutylene adipate diol and polycaprolactone diol is 600g / mol, polybutylene adipate diol and polycaprolactone The molar ratio of ester diol is 1:1, dibutyltin dilaurate accounts for 0.1wt% of the total mass of reactants, the molar ratio of hydroxyl groups to isocyanate groups is 0.5:1, and the concentration of all reactants is 10wt%, The reaction temperature is 25°C, and the reaction time is 1h. Finally, the polymer precipitate is washed several times with distilled water, and vacuum-dried at 60°C for 12h to constant weight to obtain the polyurethane PU-1 (see image...

Embodiment 2

[0072] In a glove box filled with 99.999% Ar, fresh polybutylene adipate diol, polycaprolactone diol, bis(4-hydroxyphenyl) disulfide, dibutyltin dilaurate and Tetrahydrofuran was added into a three-neck reactor equipped with a mechanical stirrer for one-step reaction. Among them, [polybutylene adipate diol + polycaprolactone diol] / [bis (4-hydroxyphenyl) disulfide] = 50 / 50 (mass ratio), polybutylene adipate The molecular weight of alcohol ester diol and polycaprolactone diol is 600g / mol, the molar ratio of polybutylene adipate diol to polycaprolactone diol is 1:1, dibutyltin dilaurate accounts for the reaction 0.1wt% of the total mass of the reactants, the molar ratio of hydroxyl groups to isocyanate groups is 0.5:1, the concentration of all reactants is 10wt%, the reaction temperature is 25 ° C, the reaction time is 1h, and finally the polymer is precipitated with distilled water After washing several times, vacuum-dry at 60° C. for 12 h to constant weight to obtain the pol...

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Abstract

The invention discloses self-healing anti-aging controllable degradable polyurethane as well as a preparation method and application thereof. The polyurethane comprises hard segment structures with self-healing and anti-aging performance and soft segment structures with a controllable degradation function, and the soft segment structures and the hard segment structures are distributed alternately;and the soft segment structures comprises polyglycol capable of being controllably degraded, the hard segment structures comprise a chain extender with a dynamic covalent bond and an isocyanate, andthe polyglycol comprises polycaprolactone glycol and polybutylene adipate glycol. The self-healing anti-aging controllable degradable polyurethane prepared by the invention has excellent mechanical property, self-healing property and anti-aging property, and has the characteristic of controllable degradation; and meanwhile, the preparation method disclosed by the invention has the characteristicsof easily available raw materials, simple process and the like, and has a wide application prospect in the field of flexible devices.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, in particular to a self-healing anti-aging controllable degradable polyurethane and its preparation method and application. Background technique [0002] Polyurethane has thermodynamically incompatible soft and hard segments, and is prone to microphase separation, so that it has excellent mechanical properties such as stretchability and good toughness, and its mechanical properties can be adjusted in a wide range, so it is a suitable electronic The base material of the skin. However, in the process of frequent use, it will inevitably be scratched, and it is particularly important for the matrix material to have self-healing properties. At present, a group of scholars have made outstanding contributions to self-healing polyurethane. They usually introduce dynamic bonds into the molecular chain to achieve self-healing effects, such as hydrogen bonds, dynamic disulfide bonds, dynamic metal coo...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/32
CPCC08G18/6633C08G18/4202C08G18/4238C08G18/4277C08G18/3863
Inventor 李凤龙应邬彬张若愚朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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