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Use of porous polymer film with regular pores for preparing anti-adhesion film

A technology of porous polymer and anti-adhesion film, which is applied in the field of polymer materials, can solve the problem that porous polymer films are difficult to apply to the mechanical properties of materials, and achieve the effect of well-assembled hard segments and good mechanical properties

Active Publication Date: 2022-06-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of mechanical properties, the porous polymer films made of these polyurethane materials are still difficult to be applied in bionics, tissue engineering and other fields that have high requirements on the mechanical properties of materials.

Method used

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  • Use of porous polymer film with regular pores for preparing anti-adhesion film
  • Use of porous polymer film with regular pores for preparing anti-adhesion film
  • Use of porous polymer film with regular pores for preparing anti-adhesion film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1 Shape memory polyurethane

[0054] This embodiment provides a shape memory polyurethane material. Its preparation method is as follows:

[0055] 1. Synthesis and purification of PDLLA-PEG400-PDLLA macrodiol

[0056]

[0057] D,L-Lactide (D,L-Lactide, melting point: 118°C, purity: 99.9%), PEG400 (Aladdin, CAS No.: 25322-68-3, Product No.: P103723), Sn(Oct) 2 (Sigma-Aldrich, CAS No.: 301-10-0, Item No.: S3252) was added to a round-bottomed flask with a magnetic stirrer in a molar ratio of 5000:100:1, vacuumed for 30 minutes, and then sealed; the single-necked flask was placed in In an oil bath at 140°C, after the mixture was completely melted, the magnetic stirring was turned on to stir the reaction system evenly, and the reaction was continued for 24 hours; after the reaction was completed, the product was purified by a co-precipitation system of dichloromethane / ice anhydrous ethanol (-15°C) for three times. Purify again with dichloromethane / glacial n-hex...

Embodiment 2

[0079] Example 2 Porous polymer film with high mechanical properties with regular pores

[0080] In this example, the shape memory polyurethane material of Example 1 is prepared into a porous polymer film with regular pores and high mechanical properties by the following method:

[0081] Weigh the ISO-PUs (ISO2-PU, M w =61kDa, PDI=1.57), dissolve completely with chloroform in the beaker, and then dilute to volume with a volumetric flask to prepare a solution of 50 mg / mL. The coverslips were washed three times with distilled water and twice with absolute ethanol and then air-dried. Place the coverslip on a horizontal laboratory table in a fume hood with an ambient temperature of 28 °C and a humidity of 70%. Use a pipette to take about 200 μL of ISO-PUs solution and evenly apply it to the surface of the coverslip. At the same time, adjust the air flow rate to volatilize. The rate is about 20 μL / min. After the solvent is completely evaporated, a porous film with a regular hexa...

experiment example 1

[0094] Experimental Example 1 Structural Characterization

[0095] The samples used in this experimental example are the ISO-PUs porous polymer film prepared in Example 2, the PPZ-PU, Upy-PU and PDLLA honeycomb porous films prepared in Comparative Example 1, and the ISO-PUs non-porous control prepared in Comparative Example 2. film.

[0096] 1. Experimental method

[0097] ① Polarizing microscope test: After the porous film on the cover glass is completely dry, place the glass slide on the stage of MP41 polarizing microscope (Mingmei Optoelectronics), and observe the porous film with a high-power lens (20-50 times) in transmission mode. The morphologies under ordinary transmitted light and cross-polarized light at corresponding positions were recorded with a digital camera.

[0098] ② Scanning Electron Microscope (SEM) test: The completely dried porous film sample was removed from the cover glass, and the surface of the film was tested by SEM using a JSM-7800F scanning elect...

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Abstract

The invention belongs to the technical field of polymer materials, and particularly relates to application of a porous polymer film with regular pores to preparation of an anti-adhesion film. The shape memory polyurethane provided by the invention is formed by polymerizing diisocyanate and a soft segment polymer, the soft segment polymer is polylactic acid, polyglycolic acid, polycaprolactone, polypolyol or a copolymer of at least two of the polylactic acid, the polyglycolic acid, the polycaprolactone and the polypolyol. The shape memory polyurethane material is combined with a water drop template method, and a porous polymer film with a crystal structure can be contained. The porous film material has excellent mechanical properties, can meet the performance requirements of application scenes such as artificial periosteum and anti-adhesion membranes, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to the use of a porous polymer film with regular pores for preparing an anti-adhesion film. Background technique [0002] Shape Memory Polymer (SMP for short), also known as shape memory polymer, refers to a product with an initial shape that changes its initial condition and is fixed under certain conditions, and then passes through external conditions (such as heat, electricity, Light, chemical induction, etc.) stimulation of the polymer material can restore its original shape. Shape memory polymers have a wide range of applications in biomedical, aerospace, optics, and textiles due to their shape-recovery properties. [0003] Shape memory polymers include thermo-type, electro-type, photo-type, chemical induction type, etc. according to their recovery principle. Among them, the thermotropic shape memory polymer can be used in medicine by controlling its glass transitio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J9/28C08L75/04C08G18/80C08G18/66C08G18/42C08G18/10C08G18/32
CPCC08J5/18C08J9/28C08G18/8016C08G18/664C08G18/428C08G18/10C08J2375/04C08G18/3218Y02W90/10
Inventor 罗彦凤杨伟王锡婉
Owner CHONGQING UNIV
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