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A kind of degradable aliphatic polycarbonate film and preparation method thereof

A family of polycarbonate, fat degradation technology, applied in the field of degradable aliphatic polycarbonate film and its preparation, to achieve the effect of easy realization, low equipment dependence, and less material consumption

Active Publication Date: 2016-03-16
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As can be seen from the above, the above are all reports about the PPC composite film material, and there is no report about the porous degradable aliphatic polycarbonate film material

Method used

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  • A kind of degradable aliphatic polycarbonate film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, the preparation of polypropylene carbonate film

[0027] Dissolve polypropylene carbonate (Wn=200,000) in chloroform to prepare a 10wt% casting solution; pour the casting solution into a flat glass mold and let it stand at 20°C for 8 hours to evaporate and remove Most of the solvent; then vacuum-dried to constant weight, the vacuum degree is 0.03MPa, the drying temperature is 50°C, and the drying time is 5 hours, and the porous degradable polypropylene carbonate film is obtained.

[0028] figure 1 The scanning electron microscope image of the polypropylene carbonate film prepared above shows that the pore diameter is 8-18 μm, the porosity is 50%, and the thickness is 20 μm.

Embodiment 2

[0029] Embodiment 2, the preparation of polypropylene carbonate film

[0030] Dissolve polypropylene carbonate (Wn=150,000) in tetrahydrofuran to make a 12wt% casting solution; pour the casting solution into a flat glass mold and let it stand at 25°C for 10 hours to remove most of it by volatilization The solvent and the chamber were then vacuum-dried to constant weight with a vacuum degree of 0.02 MPa, a drying temperature of 70° C., and a drying time of 6 hours to obtain a porous degradable polypropylene carbonate film.

[0031] The polypropylene carbonate film prepared in this example has a pore diameter of 3-8 μm, a porosity of 30%, and a thickness of 35 μm.

Embodiment 3

[0032] Embodiment 3, the preparation of polypropylene carbonate film

[0033] Dissolve polypropylene carbonate (Wn=250,000) in ethyl formate to prepare a 10wt% casting solution; pour the casting solution into a flat glass mold and let it stand at 25°C for 7 hours to evaporate and remove Most of the solvent; then vacuum-dried to constant weight, the vacuum degree is 0.03MPa, the drying temperature is 60°C, and the drying time is 5 hours, and the porous degradable polypropylene carbonate film is obtained.

[0034] The polypropylene carbonate film prepared in this example has a pore diameter of 3-8 μm, a porosity of 60%, and a thickness of 40 μm.

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Abstract

The invention discloses a degradable aliphatic polycarbonate film and a preparation method thereof. The film has a bore diameter of 3 mu m-20 mu m, an aperture ratio of 5%-80% and a thickness of 1 mu m-100 mu m. The preparation method of the film comprises the following steps of dissolving aliphatic polycarbonate in a solvent to obtain film casting liquor; and pouring the film casting liquor on a film casting plate and spreading, and stewing and drying to constant weight in sequence to obtain a product. The degradable aliphatic polycarbonate film provided by the invention has porosity characteristic and wide application prospect in the fields of biology, medicine, chemicals, environment and the like. The preparation method of the degradable aliphatic polycarbonate film is simple in process, simple and convenient to operate, easy to realize, low in device dependency and fewer in materials.

Description

technical field [0001] The invention relates to a degradable aliphatic polycarbonate film and a preparation method thereof. Background technique [0002] Aliphatic polycarbonate produced from carbon dioxide is a polymer with biodegradable properties. Because the synthetic raw material of aliphatic polycarbonate utilizes "greenhouse gas" - carbon dioxide gas, which reduces environmental pressure and belongs to waste recycling; at the same time, aliphatic polycarbonate itself has biodegradable characteristics, which can solve problems The world's "white pollution" problem, so it has very important social benefits and environmental protection value. After decades of hard work, the synthetic catalytic technology of aliphatic polycarbonate has been continuously improved, the synthetic cost has been continuously reduced, the modification space of the material has been increased, and the scope of use of the material has been expanded. [0003] Carbon dioxide copolymer with highly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08J5/18
Inventor 程瑞华金栋梁侯侨丽刘振何雪莲刘柏平
Owner CHINA NAT OFFSHORE OIL CORP
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