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Silicon dioxide/polydicyclopentadiene composite and preparation method thereof

A technology of polydicyclopentadiene and dicyclopentadiene, which is applied in the field of silica/polydicyclopentadiene composite materials, can solve the problems that the strength and toughness of pure PDCPD materials cannot be satisfied, and achieve improved dispersion and interfacial phase Capacitance, good interfacial compatibility and dispersion, high strength and toughness

Active Publication Date: 2017-05-10
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a self-healing material, it must have good comprehensive mechanical properties, and the strength and toughness of pure PDCPD materials cannot meet the requirements of self-healing materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation of the silica with non-polar groups of the present invention can be synthesized by chemical modification and sol-gel method. Through our research, we found that commercial silica is modified by silane coupling agent, and the obtained group accounted for modified The percentage composition of non-reactive silicon dioxide is usually lower than 3wt%, considering the simple and convenient operation and easy access to higher non-polar group content, therefore, the present invention selects to use silane coupling agent to pass through sol-gel method one step synthesis. The silane coupling agent is a silane coupling agent with non-polar groups, which can be vinyltrimethoxysilane, vinyltriethoxysilane, vinyl (2-methoxyethoxy) silane , Vinyltriisopropoxysilane, Vinyltriacetoxysilane, Allyltrimethoxysilane, Allyltriethoxysilane, Styreneethyltrimethoxysilane, Phenyltrimethoxysilane and one or more of phenyltriethoxysilane, preferably one or more of vinyltrimethoxy...

Embodiment 1

[0050] Put 1mL of vinyltrimethoxysilane and 100mL of distilled water in a 250mL round bottom flask, stir at 40°C for 1.5h to fully hydrolyze the silane coupling agent to obtain a clear and transparent mixed solution A; add 2mL of ammonia water to solution A , react at 50°C for 4h to obtain a uniform milky white mixed solution B; centrifuge solution B at 5000r / min for 5min to obtain a white solid, then wash the white solid twice with distilled water and ethanol successively, and finally at 50°C Dry under vacuum for 6 hours to obtain a white powder, which is vinyl silica. The average diameter of the vinyl silica as measured by a scanning electron microscope and a laser particle size analyzer is 340nm; the vinyl content in the vinyl silica is about 7% as measured by a thermogravimetric analyzer.

[0051] Put 0.01g of prepared vinyl silica and 10mL of liquid dicyclopentadiene in a 50mL round-bottomed flask, ultrasonically disperse for 15min to obtain a uniform mixed solution C; we...

Embodiment 2

[0054] Put 0.05g of prepared silicon dioxide (preparation method is the same as in Example 1) and 10mL of liquid dicyclopentadiene in a 50mL round bottom flask, and ultrasonically disperse for 15min to obtain a uniform mixed solution C; weigh 0.0124g of the first generation Grubbs catalyst, followed by 0.3 mL of CH 2 Cl 2 Dissolve the catalyst to obtain a mixed solution D; add solution D to solution C, stir evenly at room temperature and quickly inject it into the drawing spline mold, and solidify with gradient temperature rise, 2h at 70°C, 2h at 110°C, 2h at 150°C, That is, the silicon dioxide / polydicyclopentadiene composite material is obtained.

[0055] The tensile test of the sample was carried out by a universal testing machine, and the stress-strain curve was obtained, and the toughness of the composite material was obtained by integrating the curve. Compared with pure polydicyclopentadiene material, the tensile strength is increased from 22MPa to 30MPa, the elongation...

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Abstract

The invention relates to a thermosetting polymer-based composite, in particular to a silicon dioxide / polydicyclopentadiene composite, and a preparation method thereof. The composite is prepared through reaction of raw compositions and is characterized by comprising dicyclopentadiene, silicon dioxide and a catalyst, silicon dioxide accounts for 0.05-20 parts by weight and the catalyst accounts for 0.003-0.6 part by weight when dicyclopentadiene accounts for 100 parts by weight, the silicon dioxide contains nonpolar groups, and the catalyst is first-generation Grubbs catalyst or second-generation Grubbs catalyst. Compared with the prior art, the silicon dioxide / polydicyclopentadiene composite prepared has high strength and toughness; the preparation method is simple to perform, low in cost, high in efficiency, and easy to use in industrial production.

Description

technical field [0001] The invention relates to a thermosetting polymer-based composite material, more specifically, to a silica / polydicyclopentadiene composite material and a preparation method of the composite material. Background technique [0002] In recent years, with the development of Grubbs catalyst, ring-opening metathesis polymerization (ROMP) has been successfully used in the polymerization of various polar and non-polar precursors, and it has been proved to be an excellent method for the production of industrial products. Polydicyclopentadiene (PDCPD) is a thermosetting resin with high modulus, high impact resistance and chemical corrosion resistance. It is made of monomer dicyclopentadiene (DCPD) in the presence of Grubbs catalyst or two-component catalyst Polymerized by ring-opening metathesis. Recently, the application of PDCPD in self-healing materials has attracted much attention. In the self-healing system, the microencapsulated DCPD and Grubbs catalyst a...

Claims

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Application Information

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IPC IPC(8): C08F132/08C08K9/06C08K3/36
CPCC08F132/08C08K3/36C08K9/06
Inventor 王雅祺张利
Owner NINGBO UNIV
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