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Method for modifying surface of composite electrostatic spun filament integrated by initiator

An electrospinning and surface modification technology, applied in the directions of conjugated synthetic polymer rayon, chemical post-treatment of synthetic polymer rayon, filament/thread forming, etc. The surface of the silk has poor functionality and cannot meet the application requirements and other problems, so as to achieve the effect of functionalization.

Inactive Publication Date: 2012-01-11
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ma Hongwei's group once invented an initiator-integrated polydimethylsiloxane, and used SIP technology to chemically graft the surface of polydimethylsiloxane (Wu, Y.Z.; Huang, Y.Y.; Ma, H.W., A facile method for permanent and functional surface modification of poly(dimethylsiloxane). Journal of the American Chemical Society2007, 129, 7226.), but this technology only mentions that the initiator is chemically bonded to polydimethylsiloxane surface, so that the polymer layer on the surface-initiated polymerization modification can be stable and durable, and it is disclosed that it can be applied to biocompatibility, organic solvent compatibility, and heat-sensitive materials. The technical enlightenment of the application of polydimethylsiloxane as an additive in the field of electrospinning
Therefore, how to develop a set of electrospinning preparation and surface modification system based on mature electrospinning materials, from the perspective of material design, combined with surface modification technology for specific application requirements is the solution to the current surface function of electrospinning. An important way to solve problems such as poor performance and failure to meet application requirements

Method used

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  • Method for modifying surface of composite electrostatic spun filament integrated by initiator
  • Method for modifying surface of composite electrostatic spun filament integrated by initiator

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0030] Preparation of Polystyrene as Polymer Backbone by Initiator-Integrated Composite Electrospinning. Specific steps are as follows:

[0031] Weigh 10g polystyrene (PS) and 5g polydimethylsiloxane (PDMS) precursors and dissolve them in 90g tetrahydrofuran (THF), add 0.5g PDMS self-contained curing agent and 0.05g initiator A (structure: ).

[0032] Among them, PS molecular formula: Molecular formula of PDMS precursor: Molecular formula of curing agent:

[0033] The above mixture was magnetically stirred for 5-12 hours to prepare a uniform spinning solution. Such as figure 1 As shown, the spinning solution 2 is placed in the spinneret 1 , the working distance between the spinneret and the receiving substrate 5 is 10 cm, and a voltage of 10 kV is applied by a high voltage power supply 3 . Electrospinning 4 is deposited on a receiving substrate 5 . The prepared PS-PDMS composite electrospinning was heated to 65°C for 5 hours, the PDMS precursor was cured into PDMS ...

preparation Embodiment 2

[0035] Using the same method as in Example 1, the preparation of polyacrylonitrile is the composite electrospinning of the initiator integration of the macromolecular skeleton, and the specific steps are as follows:

[0036] Weigh 20g polyacrylonitrile (PAN) and 10g polydimethylsiloxane (PDMS) precursors and dissolve them in 80g dimethylformamide (DMF), add 1g PDMS self-contained curing agent and 0.1g initiator A (the structural formula is the same as above). The above mixture was magnetically stirred for 5-12 hours to prepare a uniform spinning solution. Such as figure 1 As shown, the spinning solution 2 is placed in the spinneret 1 , the working distance between the spinneret and the receiving substrate 5 is 10 cm, and a voltage of 10 kV is applied by a high voltage power supply 3 . Electrospinning 4 is deposited on a receiving substrate 5 . The prepared PAN-PDMS composite electrospinning was heated to 65°C for 5 hours, the PDMS precursor was cured into PDMS elastomer und...

preparation Embodiment 3

[0038] Using the same method as in Example 1, changing the amount of curing agent and the type of initiator, the preparation of polystyrene is the composite electrospinning of the integration of the initiator of the polymer skeleton, and the specific steps are as follows:

[0039] Weigh 10g polystyrene (PS) and 5g polydimethylsiloxane (PDMS) precursors and dissolve them in 90g tetrahydrofuran (THF), add 1.0g PDMS self-contained curing agent and 0.05g initiator B (structural formula: ). The above mixture was magnetically stirred for 5-12 hours to prepare a uniform spinning solution. Such as figure 1 As shown, the spinning solution 2 is placed in the spinneret 1 , the working distance between the spinneret and the receiving substrate 5 is 10 cm, and a voltage of 10 kV is applied by a high voltage power supply 3 . Electrospinning 4 is deposited on a receiving substrate 5 . The prepared PS-PDMS composite electrospinning was heated to 65°C for 5 hours, the PDMS precursor was cu...

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Abstract

The invention relates to the electrostatic spinning field, in particular to a method for modifying surface of electrostatic spun filament. The method of the invention is that skeletal high polymer, polydimethylsiloxane precursor, curing agent and initiator are dissolved in the corresponding solvent and are prepared into uniform spinning solution, electrostatic spinning is conducted, the spun product is heated and cured, the polydimethylsiloxane precursor is cured under the action of the curing agent and form a three-dimensional network structure, the initiator is covalently fixed on polydimethylsiloxane to form composite electrostatic spun filament integrated by the initiator, and surface-initiated polymerization reaction is conducted on the surface of the composite electrostatic spun filament integrated by the initiator according to the need. By adopting the method of the invention, the surface-initiated polymerization reaction can be conveniently realized on the surface of the composite electrostatic spun filament integrated by the initiator, so the goal of chemically modifying the surface of the electrostatic spun filament is obtained.

Description

technical field [0001] The invention relates to the field of electrospinning, in particular to a composite electrospinning surface modification method comprising polydimethylsiloxane integrated with a skeleton polymer and an initiator. Background technique [0002] Since 2000, electrospinning technology has become a research hotspot in polymer science and nanotechnology (Greiner, A.; Wendorff, J.H., Electrospinning: A fascinating method for the preparation of ultrathinfibres. Angewandte Chemie-International Edition 2007, 46, 5670 ; Li, D.; Xia, Y.N., Electrospinning of nanofibers: Reinventing the wheel? Advanced Materials 2004, 16, 1151.). The application of electrospinning is the most basic driving force and ultimate goal of electrospinning research. However, there are currently limited materials with good spinning performance, capable of forming nanofibers and assembling into thin films, such as polyvinyl alcohol (PVA), polyoxyethylene (PEO), polyvinylpyrrolidone (PVP), p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/16D01F11/04D06M14/08D01D5/00
Inventor 仰大勇马宏伟
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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