A kind of biodegradable polymer composite material and preparation method thereof

A technology of biodegradation and composite materials, which is applied in the field of biodegradable polymer composite materials and their preparation, can solve the problems of poor mechanical properties and achieve the effects of increased glass transition temperature, simple preparation process, and high saturation concentration

Active Publication Date: 2019-01-04
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the purpose of the present invention is to provide a biodegradable polymer composite material and its preparation method, wherein the key filler types and proportions in the composite material and the corresponding composite materials are prepared The overall process flow of the method, the reaction conditions of each step (especially the relevant conditions and parameters of the preparation steps of the key graphene oxide-coated silicon carbide nanorod filler) are improved, and compared with the prior art, it can effectively solve the problem of biodegradable Polymer materials, such as polypropylene carbonate with low glass transition temperature and poor mechanical properties, can effectively improve the thermal properties of polypropylene carbonate-based materials, and the obtained degradable composite materials have high mechanical strength and stable thermal properties. Features, can realize the high performance of polypropylene carbonate; the present invention first uses hydrogen peroxide solution to carry out surface hydroxylation of silicon carbide nanorods, and then prepares graphene oxide-coated silicon carbide nanorods, by controlling the filler preparation process Various conditions (such as settling time, the concentration of each raw material in the dispersion, etc.), as well as the relevant conditions of the subsequent steps of compounding the filler and the biodegradable polymer matrix material (such as polypropylene carbonate, PBAT), make graphite oxide Oxygen-containing groups can be formed on the surface of ene-coated silicon carbide nanorods, and these oxygen-containing groups can form hydrogen bonds with biodegradable polymer matrix materials (such as polypropylene carbonate, PBAT), which can make the filler Effective compounding with the matrix to further enhance the strength of the composite material

Method used

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  • A kind of biodegradable polymer composite material and preparation method thereof
  • A kind of biodegradable polymer composite material and preparation method thereof
  • A kind of biodegradable polymer composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] 800mg of silicon carbide nanorods and 16g of hydrogen peroxide solution were refluxed at 100°C for 6h, cooled to room temperature, filtered, washed repeatedly with deionized water, and dried to obtain silicon carbide nanorods with surface hydroxylation.

[0041] Add 500 mg of the above-mentioned surface hydroxylated silicon carbide nanorods to 500 ml of graphene oxide aqueous dispersion with a concentration of 10 mg / ml, and take it out after ultrasonic dispersion for 2 hours. Dilute the upper layer saturated dispersion liquid ten times by time, and use the UV spectrophotometer to obtain the sedimentation curve of the solution by using the upper liquid absorption spectra of different time periods (such as figure 1 Shown). After the solution is allowed to stand for 24 hours, take a small amount of the aqueous solution of the upper layer of saturated graphene oxide coated and dispersed silicon carbide nanorods, and observe the coating structure (such as figure 2 Shown). The...

Embodiment 2

[0044] 800mg of silicon carbide nanorods and 32g of hydrogen peroxide solution were refluxed at 60°C for 5h, cooled to room temperature, filtered, washed repeatedly with deionized water, and dried to obtain silicon carbide nanorods with surface hydroxylation.

[0045] Add 500 mg of the above-mentioned surface hydroxylated silicon carbide nanorods to 500 ml of graphene oxide aqueous dispersion with a concentration of 3 mg / ml, and take it out after ultrasonic dispersion for 2 hours. The obtained mixed solution was centrifuged at 3000 r / min for 20 min. The obtained upper-layer saturated graphene oxide coated and dispersed silicon carbide nanorod aqueous solution is freeze-dried to obtain graphene oxide coated silicon carbide nanorod powder.

[0046] 700 mg of graphene oxide coated silicon carbide nanorod powder and 10 g of polypropylene carbonate were dissolved in 250 ml of N,N-dimethylformamide, and mechanically stirred at 40°C for 3 hours. The solution is re-precipitated with a lar...

Embodiment 3

[0048] 1g of silicon carbide nanorods and 25g of hydrogen peroxide solution were refluxed at 95°C for 4h, cooled to room temperature, filtered, washed repeatedly with deionized water, and dried to obtain silicon carbide nanorods with surface hydroxylation.

[0049] Add 600mg of the above-mentioned surface hydroxylated silicon carbide nanorods to 600ml of graphene oxide aqueous dispersion with a concentration of 5mg / ml, take it out after ultrasonic dispersion for 3h, let it stand for 24h, take the upper layer of saturated graphene oxide to disperse the silicon carbide nanorod aqueous solution Freeze drying to obtain graphene oxide coated silicon carbide powder.

[0050] Dissolve 240 mg of graphene oxide coated silicon carbide nanorod powder and 4.8 g of polypropylene carbonate in 100 ml of ethanol, and mechanically stir at 40° C. for 3 hours. The solution is re-precipitated with a large amount of deionized water, washed, dried, and hot-pressed to obtain a graphene oxide-coated silic...

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Abstract

The invention discloses a biodegradable polymer composite material and a preparation method thereof. The composite material is prepared from a biodegradable polymer matrix material and graphene oxide-coated silicon carbide nano-rods, wherein the biodegradable polymer matrix material is filled with the graphene oxide-coated silicon carbide nano-rods; besides, a mass ratio of the biodegradable polymer matrix material to the graphene oxide-coated silicon carbide nano-rods is 100:(0.1 to 10), and the biodegradable polymer matrix material is poly propylene carbonate or PBAT (poly(butylenes adipate-co-terephthalate)). Compared with the prior art, the preparation method has the advantage that by improving the type and the proportion of the key filler in the composite material, an integral technological process and reaction conditions of various steps of the corresponding preparation method of the composite material, and the like, the problems of low glass transition temperature and poor mechanical property of a biodegradable polymer (such as the poly propylene carbonate) can be solved.

Description

Technical field [0001] The invention belongs to the technical field of biodegradable materials, and more specifically, relates to a biodegradable polymer composite material and a preparation method thereof. The biodegradable polymer composite material has high strength and is a kind of graphene oxide coated carbonization Silicon nanorods / biodegradable polymer materials (such as graphene oxide coated silicon carbide nanorods / polypropylene carbonate materials, graphene oxide coated silicon carbide nanorods / PBAT materials, etc.). Background technique [0002] Polypropylene carbonate (PPC) is an alternating copolymerization product of carbon dioxide and propylene oxide. The use of carbon dioxide as a raw material for the chemical industry is considered to be the main polymer material to solve the greenhouse effect and white pollution. As a thermoplastic aliphatic polycarbonate, PPC has attracted considerable attention all over the world. Because of its complete biodegradability, ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L67/02C08K9/02C08K7/00C08K3/34
CPCC08J5/18C08J2367/02C08J2369/00C08K3/34C08K7/00C08K9/02C08K2201/003C08K2201/004C08K2201/011C08L2201/06C08L2201/08C08L2203/16C08L2203/30C08L69/00C08L67/02
Inventor 解孝林瞿昊叶昀昇周兴平陈超薛阳邓宁心
Owner HUAZHONG UNIV OF SCI & TECH
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