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Preparation method of transparent flexible film of POSS (polyhedral oligomeric silsesquioxane) enhanced aramid nanofiber

A nanofiber and flexible film technology, applied in the field of preparation of transparent flexible films, can solve the problems of poor thermodynamic performance and low strength of aramid fiber nanofiber film, and achieve improved tensile strength, strong adjustable performance, and maintain transparency. and softness effect

Active Publication Date: 2017-08-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low strength and poor thermodynamic properties of existing aramid fiber nanofiber membranes, and provide a method for preparing a POSS reinforced transparent flexible film of aramid fiber nanofibers

Method used

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  • Preparation method of transparent flexible film of POSS (polyhedral oligomeric silsesquioxane) enhanced aramid nanofiber
  • Preparation method of transparent flexible film of POSS (polyhedral oligomeric silsesquioxane) enhanced aramid nanofiber
  • Preparation method of transparent flexible film of POSS (polyhedral oligomeric silsesquioxane) enhanced aramid nanofiber

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specific Embodiment approach 1

[0026] Specific embodiment one: This embodiment is a kind of preparation method of the transparent flexible film of POSS reinforced aramid fiber nanofiber, specifically is finished according to the following steps:

[0027] 1. Extraction: Use acetone as the extraction solvent, and use a Soxhlet extractor to extract the aramid fiber for 48h to 72h to obtain the extracted aramid fiber; then extract the aramid fiber at a temperature of Vacuum drying in a vacuum drying oven at 40°C to 90°C for 12h to 72h to obtain dried aramid fibers;

[0028] 2. Use nitrogen to purge the dry three-necked bottle for 20-30 minutes, then add dimethyl sulfoxide, potassium hydroxide and dried aramid fiber into the three-necked bottle, and then stir at a stirring speed of 500r / min-1300r / min. Stirring and reacting for 3 days to 10 days to obtain a dark red aramid fiber nanofiber solution;

[0029] The mass of the dry aramid fiber described in step 2 is (0.5g~2g):500mL with the volume ratio of dimethyl ...

specific Embodiment approach 2

[0044] Embodiment 2: This embodiment differs from Embodiment 1 in that: the temperature of the extraction treatment described in step 1 is 50° C. to 130° C. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0045] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the aramid fiber described in step 1 is one of Kevlar fibers of 50 denier to 1600 denier or a mixture of several of them . Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method of a transparent flexible film of POSS (polyhedral oligomeric silsesquioxane) enhanced aramid nanofiber, and relates to a preparation method of a transparent flexible film. The preparation method aims at solving the problems of low intensity and poor thermodynamic property of the existing aramid fiber nanofiber film. The method comprises the following steps of 1, performing extraction; 2, preparing a kermesinus aramid nanofiber solution; 3, preparing POSS dispersion liquid; 4, preparing a POSS hybridized aramid nanofiber solution; 5, preparing hybridized aramid nanofiber hydrogel; 6, performing vacuum pumping and drying to obtain the transparent flexible film of the POSS enhanced aramid nanofiber. The tensile strength of the transparent flexible film of the prepared POSS enhanced aramid nanofiber is greater than 316MPa; the tensile strength of the pure aramid nanofiber film is 202MPa; the tensile strength is improved by about 56.43 percent. The invention provides the preparation method capable of obtaining the transparent flexible film of the prepared POSS enhanced aramid nanofiber.

Description

technical field [0001] The invention relates to a preparation method of a transparent flexible film. Background technique [0002] Nanofibrous membranes have the characteristics of large specific surface area, small pore size and light weight, and have been widely used in various fields such as bioengineering, tissue engineering, environmental engineering, fuel cells and sensors. Especially in recent years, the development of filtration is very rapid. However, the mechanical strength of the nanofibrous membrane is not high, and it cannot maintain a complete membrane structure for a long time in a special environment, which limits the application of the nanofibrous membrane. Improving the mechanical properties of nanofiber membranes and functionalizing the fiber membranes through physical and chemical modification methods have increasingly attracted widespread attention of scientific researchers. [0003] Kevlar fiber is a high-performance para-aramid fiber developed by DuP...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J3/075C08L77/10C08L83/04D06M11/38D06M101/36
CPCD06M11/38C08J3/075C08J5/18C08L77/10C08J2377/10C08J2483/04C08L2201/10C08L2201/08D06M2101/36C08L83/04
Inventor 黄玉东王芳吴亚东黎俊马丽娜
Owner HARBIN INST OF TECH
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