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Thermosetting polymer compound, thin film and preparation method thereof

A composite film and thermosetting technology, applied in the field of thermosetting polymer composite film and its preparation, can solve the problems of non-recycling, inability to melt and plasticize, environmental pollution, etc., and achieve the effect of avoiding complex product structure and excellent mechanical properties.

Active Publication Date: 2015-06-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with thermoplastic polymer materials, the matrix of thermosetting polymer composite materials generally forms a prepolymer first, and the potential functional groups in it continue to react to form a crosslinked structure and solidify during molding. This transformation is irreversible and cannot be melted and plasticized when heated. , is also insoluble in solvents and cannot be recycled
Composite material waste (such as circuit boards) is usually treated as landfill or incineration, which not only causes a huge waste of resources, but also brings serious environmental pollution

Method used

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  • Thermosetting polymer compound, thin film and preparation method thereof
  • Thermosetting polymer compound, thin film and preparation method thereof
  • Thermosetting polymer compound, thin film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Graphene oxide was modified with aromatic diamine MDA (the product is labeled as MDA-GO, the primary amino group content is 0.31mmol / g), and a 2mg / ml MDA-GO aqueous solution was prepared. 20.01 mmol of paraformaldehyde and 10 ml of dimethylformamide / water mixed solvent were prepared into a suspension, stirred and reacted at 100° C. for 0.1 hour for depolymerization, and cooled to room temperature to obtain a colorless and transparent formaldehyde reaction liquid. Dissolve 10 mmol of aromatic diamine MDA in 8 ml of dimethylformamide to obtain a transparent aromatic amine reaction solution. Mix the formaldehyde, aromatic amine reaction solution and 2ml MDA-GO aqueous solution evenly (the volume content of water in the mixed solvent of the final reaction system is 10%), ultrasonically disperse at room temperature for 10 minutes, and stir and react at 30°C for 60 minutes for prepolymerization. Lay a film on a horizontal glass plate, dry at 120°C for 0.5 hours, and dry at 18...

Embodiment 2

[0032] Graphene oxide was modified with aromatic diamine SDA (the product is labeled as SDA-GO, the primary amino group content is 0.63mmol / g), and a 20mg / ml SDA-GO aqueous solution was prepared. 14.13 mmol of paraformaldehyde and 7 ml of 2,5-dimethylfuran / water mixed solvent were prepared into a suspension, stirred and reacted at 80°C for 0.8 hours for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. Dissolve 7 mmol of aromatic diamine ODA in 3 ml of 2,5-dimethylfuran to obtain an aromatic amine reaction liquid. Mix the formaldehyde, aromatic amine reaction solution and 10ml SDA-GO aqueous solution evenly (the volume content of water in the mixed solvent of the final reaction system is 50%), ultrasonically disperse at room temperature for 60 minutes, and stir and react at 50°C for 5 minutes for prepolymerization. Lay a film on a horizontal glass plate, dry at 70°C for 5 hours, and dry at 190°C for 3 hours to obtain the target product ...

Embodiment 3

[0034]Graphene oxide was modified with aromatic diamine APB (the product is marked as APB-GO, the primary amino group content is 0.27 mmol / g), and a 3 mg / ml APB-GO aqueous solution was prepared. 16.01 mmol of paraformaldehyde and 6 ml of dimethyl sulfoxide / water mixed solvent were prepared into a suspension, stirred and reacted at 60° C. for 2 hours for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. Dissolve 8 mmol of aromatic diamine BDAO in 2 ml of N-methylpyrrolidone to obtain an aromatic amine reaction liquid. Formaldehyde, aromatic amine reaction solution and 12ml APB-GO aqueous solution were mixed evenly (the volume content of water in the mixed solvent of the final reaction system was 60%), ultrasonically dispersed at room temperature for 30 minutes, stirred and reacted at 40°C for 3 minutes for prepolymerization, and further Lay film on a horizontal glass plate, dry at 80°C for 3 hours, and dry at 200°C for 2 hours to obtain ...

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Abstract

The invention belongs to the field of thermosetting polymer materials, and particularly relates to a thermosetting polymer compound, a thin film and a preparation method thereof. The preparation method comprises the following steps: 1) preparing an amino graphene aqueous solution; 2) preparing paraformaldehyde and aprotic / water mixed solvent into suspension, depolymerizing, and cooling to the room temperature to obtain formaldehyde reaction liquid; 3) dissolving aromatic diamine and / or aromatic triamine in an aprotic solvent to obtain arylamine reaction liquid; 4) uniformly mixing the formaldehyde reaction liquid and the arylamine reaction liquid with the amino graphene aqueous solution, pre-polymerizing, horizontally paving a film, and curing at a high temperature to prepare the thin film. The thickness of the thin film is adjustable, the mechanical properties of the thin film are excellent, and the Young modulus, the tensile strength, the elongation at break and the tensile failure can respectively reach 3-6 GPa, 90-140 MPa, 3-6% and 2.0-3.0 MJ / m<3>. The main raw materials, namely arylamine and functional graphene of the composite thin film can be recycled, and the recovery rate is higher than 90%.

Description

technical field [0001] The invention relates to the field of thermosetting polymer materials, in particular to a recyclable thermosetting polymer composite film and a preparation method thereof. Background technique [0002] Thermosetting polymer composite materials have the characteristics of high specific strength and specific stiffness, good corrosion resistance, and stable structure and size. They have been widely used in high-tech fields such as electronic information, aerospace, wind power, and transportation. However, compared with thermoplastic polymer materials, the matrix of thermosetting polymer composite materials generally forms a prepolymer first, and the potential functional groups in it continue to react to form a crosslinked structure and solidify during molding. This transformation is irreversible and cannot be melted and plasticized when heated. , is also insoluble in solvents and cannot be recycled. Composite material waste (such as circuit boards) is us...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L61/22C08G12/08C08K9/04C08K3/04C08J11/16
CPCY02W30/62
Inventor 袁彦超严石静孙艳晓赵建青刘述梅
Owner SOUTH CHINA UNIV OF TECH
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