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Polycaprolactone hybrid cross-linked network with thermal/magnetic response two-way shape memory function and self-healing capability and preparation method of polycaprolactone hybrid cross-linked network

A polycaprolactone and hybrid cross-linking technology, which is applied in the field of preparation of polymer cross-linked networks, can solve the limitation of material forming and processing methods, it is difficult to meet application requirements, it is difficult to meet two-way shape memory at the same time, and it can be reprocessed many times. Stimulus response and other issues, to achieve the effect of easy process control, simple preparation method, and widening application fields

Active Publication Date: 2017-07-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned polymer cross-linking network exhibits a good two-way shape memory ability, this irreversible covalent cross-linking network structure greatly restricts the molding and processing methods of the material, making it difficult to meet a wide range of application requirements.
Obviously, it is difficult for this technology to meet the requirements of two-way shape memory, reprocessing, and multi-stimulus response at the same time.

Method used

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  • Polycaprolactone hybrid cross-linked network with thermal/magnetic response two-way shape memory function and self-healing capability and preparation method of polycaprolactone hybrid cross-linked network
  • Polycaprolactone hybrid cross-linked network with thermal/magnetic response two-way shape memory function and self-healing capability and preparation method of polycaprolactone hybrid cross-linked network
  • Polycaprolactone hybrid cross-linked network with thermal/magnetic response two-way shape memory function and self-healing capability and preparation method of polycaprolactone hybrid cross-linked network

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Embodiment 1

[0044] The present invention proposes a polycaprolactone hybrid cross-linked network with thermal / magnetic response two-way shape memory function and self-healing ability, and selects a polycaprolactone with excellent biocompatibility and biodegradability in molecular design. Polycaprolactone is used as the basic segment of the PCL hybrid cross-linked network with thermal / magnetic response two-way shape memory function and self-healing ability; the end group modification of the polymer segment is carried out by catechol groups, Coordinated with Fe3O4 nanoparticles to obtain a semi-crystalline PCL hybrid cross-linked network with thermal / magnetic responsive two-way shape memory function, reprocessability and self-healing ability:

[0045] The structure of the polymer portion of the polycaprolactone hybrid crosslinked network is

[0046]

[0047] In the formula, PCL represents the polycaprolactone segment, the number average molecular weight is 2000-10000 g / mol, and R represe...

Embodiment 2

[0049] This embodiment is further optimized on the basis of the above embodiments, further to better realize the polycaprolactone hybrid cross-linked network with thermal / magnetic response two-way shape memory function and self-healing ability described in the present invention : The structure of the polycaprolactone hybrid cross-linked network is

[0050]

[0051] In the formula Represents the polymer part of the polycaprolactone hybrid cross-linked network, the number average molecular weight is 2000-10000g / mol, Represents the portion of the magnetic Fe3O4 nanoparticles in the polycaprolactone hybrid crosslinked network.

Embodiment 3

[0053] This embodiment is further optimized on the basis of any of the above embodiments, further to better realize the polycaprolactone hybrid hybrid with thermal / magnetic response two-way shape memory function and self-healing ability described in the present invention. Linked network: the polycaprolactone hybrid crosslinked network has a ferric oxide nanoparticle content of 5 to 30 wt%, and a gel content of 70 to 100%; the polycaprolactone hybrid crosslinked network is unidirectional Shape memory fixation rate R f 70-100%, shape memory recovery rate R r 70% to 100%; the bidirectional shape memory recovery rate R of the polycaprolactone hybrid cross-linked network rec The repair efficiency of the polycaprolactone hybrid cross-linked network can reach 85-95% at 100° C. for 10 hours.

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Abstract

The invention discloses a polycaprolactone hybrid cross-linked network with a thermal / magnetic response two-way shape memory function and self-healing capability and a preparation method of the polycaprolactone hybrid cross-linked network. A structural formula of a polymer part of the polycaprolactone hybrid cross-linked network is as shown in the specification. In the formula, PCL represents a polycaprolactone chain segment with a number-average molecular weight of 2000-10000g / mol; and R represents a hydrocarbonyl part in a coupling agent diisocyanate. The polycaprolactone hybrid cross-linked network is a novel semi-crystalline polycaprolactone hybrid cross-linked network with the advantages of two-way shape memory function, thermal / magnetic response, reprocessibility, self-healing capability and the like. According to the preparation method, catechol group terminated polycaprolactone and Fe3O4 nano-particles are subjected to coordination crosslinking. The preparation method comprises the following specific steps: 1) preparing the catechol group terminated polycaprolactone; 2) preparing oleic acid group modified Fe3O4 nano-particles; and 3) preparing the polycaprolactone hybrid cross-linked network.

Description

technical field [0001] The present invention relates to the field of preparation of polymer cross-linked network, specifically, polycaprolactone hybrid cross-linked network with thermal / magnetic response two-way shape memory function and self-healing ability and its preparation method, the polycaprolactone The ester hybrid cross-linked network can be used as medical materials with memory function, aerospace materials, degradable materials, sensors, etc. Background technique [0002] Shape memory materials (shape memory materials, SMMs) are a new type of intelligent material that has been developed rapidly in recent years. And shape memory polymers (shape memory polymers, SMPs) have also been developed. Among them, SMPs have attracted widespread attention in the world due to their advantages of large deformation, light weight, easy control of structural properties, easy molding and processing, and low cost, and related research has also developed rapidly. [0003] Shape mem...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K9/04C08K3/22C08J3/24C08J5/18C08G63/91
CPCC08G63/912C08J3/24C08J5/18C08J2367/04C08K3/22C08K9/04C08K2003/2275C08K2201/01C08K2201/011C08L2201/06C08L2201/12C08L2203/16C08L67/04
Inventor 杨科珂杜澜王玉忠范诚杰徐志远
Owner SICHUAN UNIV
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