Preparation method, product and application of polyurethane material capable of being self-assembled into nano tube

Preparation method, product and application of polyurethane material capable of being self-assembled into nano tube

  • CN 104,292,477 A
  • Filed: 10/17/2014
  • Published: 01/21/2015
  • Est. Priority Date: 10/17/2014
  • Status: Active Application
First Claim
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1. can be self-assembled into a preparation method for the polyurethane material of nanotube, it is characterized in that, comprise the following steps:

  • (1) ethylenediamine tetraacetic acid (EDTA)-2 sodium, PEG-4000 are carried out esterification under sulfuric acid catalysis;

    Then underpressure distillation removing moisture, crosses and filters unreacted ethylenediamine tetraacetic acid (EDTA)-2 sodium, then filtration product poured in solvent orange 2 A and wash away unreacted PEG-4000 and oligopolymer thereof, finally centrifugal, dry, obtains ethylenediamine tetraacetic acid (EDTA)-glycol;

    (2) under organotin catalyzed, by ethylenediamine tetraacetic acid (EDTA)-glycol, poly-hexanodioic acid-1,4 butanediol ester glycol, and vulcabond joins in solvent B and is polymerized, add chainextender again, continue reaction, then reaction product is poured in mould, and be placed on slaking in baking oven, obtain biodegradable polyurethane material;

    (3) under agitation, the polyurethane material of step (2) gained is dissolved in solvent B, then adds deionized water under ultrasound condition, obtain polyurethane suspension, finally described polyurethane suspension is moved in dialysis tubing, dialyse in deionized water, after dilution, namely obtain aqueous polyurethane.

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