Graphite-like carbon nitride/polyvinylidene fluoride composite material and preparation method thereof

A graphite-type carbon nitride and polyvinylidene fluoride technology, applied in the fields of polyvinylidene fluoride composite materials and their preparation, high-performance polymer composite materials and their preparation fields, can solve the problem of low friction coefficient wear resistance, low density, low energy problems

Inactive Publication Date: 2014-09-03
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] C 3 N 4 It is a carbon and nitrogen compound, which has five possible structures, namely α phase, β phase, cubic phase, quasi-cubic phase and graphite-like type; graphite-like carbon nitride g-C 3 N 4 It has the lowest density and the lowest energy, and is the most stable phase in carbonitrides, g-C 3 N 4 It has a graphite-like layered structure with C between the layers 3 N 3 Ring or C 6 N 7 The rings are connected by the N atoms at the ends to form a layer of infinitely expanded planes; carbon nitride materials have a hardness comparable to that of diamonds, and are considered to be a new generation of superhard materials in the future. In addition to potential Excellent mechanical properties, also has excellent toughness, low friction coefficient and excellent wear resistance characteristics, may become a new generation of superhard wear-resistant coating materials, due to its potential wide application prospects, graphite-like carbon nitride g-C 3 N 4 It has attracted more and more attention from researchers, but the research on filling graphite-like carbon nitride into the polymer matrix to improve the performance of the matrix has not been reported

Method used

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  • Graphite-like carbon nitride/polyvinylidene fluoride composite material and preparation method thereof
  • Graphite-like carbon nitride/polyvinylidene fluoride composite material and preparation method thereof
  • Graphite-like carbon nitride/polyvinylidene fluoride composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 5g of melamine, put it in a corundum crucible and cover it, raise the temperature to 550°C in a muffle furnace, and the heating rate is 3°C min -1 , and calcined at 550°C for 4 h, then naturally cooled to room temperature to obtain a yellow solid, which was ground to obtain g-C 3 N 4 , the XRD pattern of the prepared powder is shown in figure 1 .

[0040] Weigh the yellow g-C prepared above 3 N 4 Powder 2g, added volume is g-C 3 N 4 Powder volume 5 times the absolute ethanol solution, then g-C 3 N 4 The mixture of powder and absolute ethanol was dispersed in an ultrasonic vibrator for 30 minutes, and g-C was added to the suspension during the ultrasonic vibration 3 N 4 Coupling agent γ-aminopropyltriethoxysilane with 2% powder mass, then place the mixed solution with coupling agent in an oven and dry for 20 hours at a temperature of 80°C, and dry the alcohol to obtain a dispersion And surface treated g-C 3 N 4 powder raw material.

[0041] The polyvin...

Embodiment 2

[0045] Weigh 3g of melamine, put it in a corundum crucible and cover it, raise the temperature to 550°C in a muffle furnace, and the heating rate is 3°C min -1 , and calcined at 550°C for 4 h, then naturally cooled to room temperature to obtain a yellow solid, which was ground to obtain g-C 3 N 4 , the XRD pattern of the prepared powder is shown in figure 1 .

[0046] Weigh the yellow g-C prepared above 3 N 4 Powder 1g, added volume is g-C 3 N 4 Powder volume 5 times the absolute ethanol solution, then g-C 3 N 4 The mixture of powder and absolute ethanol was placed in an ultrasonic vibrator to disperse for 40 minutes, and g-C was added to the suspension during the ultrasonic vibration 3 N 4 Coupling agent γ-aminopropyltriethoxysilane with 2% powder mass, then put the mixed solution with coupling agent in an oven and dry for 10 hours at a temperature of 80°C, and dry the alcohol to obtain a dispersion And surface treated g-C 3 N 4 powder raw material.

[0047] The ...

Embodiment 3

[0051] Weigh 2g of melamine, put it in a corundum crucible and cover it, raise the temperature to 550°C in a muffle furnace, and the heating rate is 3°C min -1 , and calcined at 550°C for 4 h, then naturally cooled to room temperature to obtain a yellow solid, which was ground to obtain g-C 3 N 4 , the XRD pattern of the prepared powder is shown in figure 1

[0052] Weigh the yellow g-C prepared above 3 N 4 Powder 0.5g, added volume is g-C 3 N 4 Powder volume 5 times the absolute ethanol solution, then g-C 3 N 4 The mixture of powder and absolute ethanol was placed in an ultrasonic vibrator to disperse for 40 minutes, and g-C was added to the suspension during the ultrasonic vibration 3 N 4 Coupling agent γ-aminopropyltriethoxysilane with 2% powder mass, then put the mixed solution with coupling agent in an oven and dry for 10 hours at a temperature of 80°C, and dry the alcohol to obtain a dispersion And surface treated g-C 3 N 4 powder raw material.

[0053] The ...

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Abstract

The invention discloses a graphite-like carbon nitride/polyvinylidene fluoride composite material and a preparation method thereof. The composite material comprises 50-99wt% of polymer matrix polyvinylidene fluoride (PVDF), and 1-50wt% of graphite-like carbon nitride g-C3N4 processed by a surface modifier. The preparation method of the composite material comprises the following steps: preparing the graphite-like carbon nitride g-C3N4, processing a packing surface, mixing two powdery raw materials in a liquid phase and carrying out quick agitation and drying treatment, hot press molding or plastic extrusion molding. Compared with a pure polyvinylidene fluoride material, the graphite-like carbon nitride/polyvinylidene fluoride composite material has the advantages that the heat stability, the chemical stability and the mechanical property of the material can be effectively improved when the tribological property is greatly improved, the coefficient of linear expansion of the material is reduced, the barrier property of the material is improved, and the graphite-like carbon nitride/polyvinylidene fluoride composite material is widely applied to the industries such as space flight and aviation, electrics, microelectronics and automobiles.

Description

technical field [0001] The invention relates to a high-performance polymer composite material and a preparation method thereof, in particular to a polyvinylidene fluoride composite material filled with graphite-like carbon nitride and a preparation method thereof, belonging to the technical field of polymer composite materials. Background technique [0002] Polyvinylidene fluoride (PVDF) is a widely used fluorine-containing plastic. PVDF has the characteristics of both fluororesins and general-purpose resins. Like other fluororesins, PVDF has extraordinary weather resistance, UV resistance and nuclear radiation resistance. ; High mechanical strength, rigidity and wear resistance; Excellent heat resistance and chemical resistance; Excellent moisture resistance, mildew resistance, anti-sticking and anti-pollution properties; Excellent piezoelectricity, pyroelectricity, electrical insulation etc.; PVDF is a semi-crystalline thermoplastic linear polymer with a glass transition t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K9/06C08K9/04C08K3/28
Inventor 朱琳刘芳菲沈湘黔胡超伟
Owner JIANGSU UNIV
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