Multi-responsive shape memory urethane acrylate copolymer and preparation method thereof

A technology of urethane acrylate and copolymer, which is applied in the field of preparation of urethane acrylate-based copolymers, and can solve problems such as not found
CN110483699AActive Publication Date: 2019-11-22CHANGZHOU UNIV
7 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGZHOU UNIV
Publication Date
2019-11-22

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a multi-response polyurethane acrylate (PUA)-based copolymer and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a PUA prepolymer, N-isopropylacrylamide and an acrylic monomer according to a certain ratio in an N,N-methylene acrylamide (DMF) solvent, adding a photoinitiator, and irradiating the mixture under an ultraviolet lamp to initiate free radical polymerization, thereby obtaining the multi-response copolymer. According to the invention, an active diluent is added on the basis of PUA for cross-linking copolymerization, and chain segments interact with each other to inhibit crystallization, so that a glass transition region with a relatively wide temperature interval is obtained, and a multiple shape memory effect is obtained on the basis of an original PUA single shape memory cycle (SMC). Due to the compact cross-linked structure, the hydrogel also has a slow-release effect in the aspect of drug release,and is expected to be used in the field of biomedicine.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a preparation method of a multi-response polyurethane acrylate (PUA)-based copolymer. Background technique

[0002] Shape memory polyurethane (SMPU), as a class of smart materials with broad application prospects, has attracted more and more attention. This kind of material has a special ability to obtain a temporary shape under the action of external stress, and can fix the deformation at a lower temperature, and then resist the external environment (such as heat, light, moisture, electricity and magnetic field, etc.) Spontaneously return to its pre-deformed shape upon stimulation. It is this attractive performance that gives SMPUs great potential for wide application in smart fabrics, smart packaging, biomedical devices, sensors, and actuators.

[0003] Thermosensitive SMPU can be regarded as a two-phase structure, that is, a stationary phase that can remember the initial shape and a reversible phase that can undergo revers...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More