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Ditellurium-containing degradable polycarbonate polyurethane and preparation method thereof

A technology of polycarbonate and polycarbonate II, which is applied in the field of degradable polycarbonate polyurethane and its preparation, can solve problems such as limited application and inability to respond intelligently, and achieve controllable structure, reduced activation and adhesion, and good removal The effect of oxygen free radical capacity

Active Publication Date: 2020-03-17
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But on the other hand, due to its own structure, most polyurethane materials are often unable to achieve intelligent response to the service environment, which greatly limits its wider application.

Method used

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  • Ditellurium-containing degradable polycarbonate polyurethane and preparation method thereof
  • Ditellurium-containing degradable polycarbonate polyurethane and preparation method thereof
  • Ditellurium-containing degradable polycarbonate polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of ditellurium-containing polycarbonate polyurethane (PCU-TeTe):

[0029]

[0030] Step 1. Pre-dewater 1,6-hexanediol polycarbonate diol (PCDL, 5g, 1kDa) at 100°C for 3h under vacuum, and add 2.56g of MDI to the reaction containing PCDL under the protection of argon. In the device, stir at 60°C for 2 hours to obtain a prepolymer;

[0031] Step 2. Weigh 1.75g ​​of ditelluridediethanol and dissolve it in 80ml of dry N,N-dimethylacetamide (DMAc), inject the solution into the reactor with a syringe, mix it with the prepolymer and add 1 ‰ of stannous octoate. After continuing to stir and react at 70°C for 10 hours, slowly transfer the reaction solution to 1L of methanol for precipitation, and repeatedly wash the solid with methanol and ethanol for 2 to 3 times, then dry it in a vacuum oven to obtain ditellurium-containing polycarbonate Polyurethane, and named PCU-TeTe.

[0032] According to the method described in step 1 and step 2, an equivalent amount of 1,...

Embodiment 2

[0048] Preparation of ditellurium-containing polycarbonate polyurethane (PCU-I-TeTe):

[0049]

[0050] Step 1. Pre-dewater 1,6-hexanediol polycarbonate diol (PCDL, 5g, 1kDa) at 100°C for 3h under vacuum. Under the protection of argon, add 2.67g IPDI to the reaction containing PCDL In the device, stir at 60°C for 2 hours to obtain a prepolymer;

[0051] Step 2. Weigh 1.75g ​​of ditelluridediethanol and dissolve it in 80ml of dry DMAc, inject the solution into the reactor with a syringe, mix it with the prepolymer evenly, and then add 2‰ of stannous octoate. After continuing to stir and react at 70°C for 8 hours, slowly transfer the reaction solution to 1L of methanol for precipitation, wash the solid with methanol and ethanol for 2 to 3 times, and then dry it in a vacuum oven to obtain ditellurium-containing polycarbonate Polyurethane, and named PCU-I-TeTe.

Embodiment 3

[0053] Preparation of ditellurium-containing polycarbonate polyurethane (PCU-HM-TeTe):

[0054]

[0055] Step 1. Pre-dewater 1,6-hexanediol polycarbonate diol (PCDL, 10g, 2kDa) at 100°C for 3h under vacuum, and add 2.68g of HMDI to the reaction containing PCDL under the protection of argon. In the device, stir at 60°C for 2 hours to obtain a prepolymer;

[0056] Step 2. Weigh 1.75g ​​of ditelluridediethanol and dissolve it in 120ml of dry DMAc, inject the solution into the reactor with a syringe, mix it with the prepolymer evenly, and then add 3‰ of stannous octoate. After continuing to stir and react at 70°C for 7 hours, slowly transfer the reaction solution to 1L of methanol for precipitation, wash the solid with methanol and ethanol for 2 to 3 times, and then dry it in a vacuum oven to obtain ditellurium-containing polycarbonate Polyurethane, and named PCU-HM-TeTe.

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Abstract

The invention discloses ditellurium-containing degradable polycarbonate polyurethane and a preparation method thereof; a molecular chain of the ditellurium-containing degradable polycarbonate polyurethane contains a -Te-Te- group and has a repeating unit with the following structure: a structure defined in the specification or another structure defined in the specification, in the formula, m and nare any integer from 2 to 8; T is a chain segment of polycarbonate diol; G is a structural unit of diisocyanate. The ditellurium-containing degradable polycarbonate polyurethane provided by the invention is controllable in structure and adjustable in tellurium content, and the molecular structure of the obtained polymer is determined; ditellurium diol or ditellurium diamine is used as a chain extender to introduce a ditellurium group into a polymer main chain, and the prepared polymer has oxidation-reduction responsiveness, and also has good oxygen free radical scavenging ability and anti-inflammatory effect.

Description

technical field [0001] The invention relates to the technical field of ditellurium-containing polymers, in particular to a ditellurium-containing degradable polycarbonate polyurethane and a preparation method thereof. Background technique [0002] In recent years, cardiovascular disease has become the number one killer threatening human life and health. Among conventional treatment methods, taking and injection of drugs, interventional therapy, etc. have become effective means and are widely used by people. The interventional treatment methods often require people to modify the intervention materials to ensure special effects such as anti-inflammation, anti-coagulation and scavenging oxygen free radicals. [0003] Tellurium is a metalloid existing in the periodic table of elements, and studies have shown that the bond energy of the ditellurium bond is only 126kJmol -1 , this feature gives ditellurium bonds many unique properties. In recent years, Xu Huaping's research gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/44C08G18/32C08G18/10A61P39/06A61P29/00A61P7/02
CPCC08G18/44C08G18/10A61P39/06A61P29/00A61P7/02C08G18/3897
Inventor 赵元聪李培闯王进周磊李欣王锐陈航王克兵
Owner SOUTHWEST JIAOTONG UNIV
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