Preparation method of antibacterial composite film material
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A kind of composite membrane, composite thin film technology
Inactive Publication Date: 2014-02-19
珠海嘉雄包装材料有限公司
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[0002] In recent years, people have paid more and more attention to the application of variable frequency motors, but at the same time as this new technology is adopted, a troublesome problem has emerged one after another: in the pulse width modulation variable frequency drive system, due to the wave reflection of the long cable, the motor The overvoltage generated on the terminal, coupled with the extremely uneven distribution of the pulse voltage on the winding group, makes the inter-turn voltage of the winding near the head end tens of times higher than the average distribution voltage, resulting in corona discharge between the winding turns, thus Make the motor insulation break down prematurely. Practice has shown that adding a certain amount of inorganic nano-oxides to the existing high heat-resistant insulating materials can greatly improve the high-temperature resistance of the original polymer while maintaining the high-temperature performance of the polymer. The corona resistance performance of insulating materials can meet the operation requirements of variable frequency motors and ensure the life of variable fre
Method used
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Embodiment 1
[0016] (1) Mixing of raw materials: Heat 3g of 4,4'-diaminodiphenyl ether and 54mL of N,N-dimethylacetamide in a three-necked flask at room temperature, stir until completely dissolved by ultrasonic stirring, then add 5.72 g Sol, continue ultrasonic stirring for 28min;
[0017] (2) Polyamic acid / Preparation of the precursor: under the condition of an ice-water bath, 3.27g of pyromellitic dianhydride was added to the three-necked flask in 6 times on average to obtain polyamic acid / Precursor, continue to stir for 6h, mix well With polyamic acid; Add 3g antibacterial complex again; The preparation method of described antibacterial complex is:
[0018] Mix hops, airplane grass, quinquefolium, thyme, galangal, garlic, mugwort leaves, and water according to 15-20: 10-15: 10-15: 12-15: 8-10: 8-10: 5-7: 15 The mass parts of -20 are mixed in proportion, and cellulase is added (8 parts of activity unit is 100U) for enzymolysis, the enzymolysis reaction temperature is 25°C, the...
Embodiment 2
[0022] Example 2: The rest are the same as in Example 1, except that in the step (1), the stirring time is controlled to be 32 min; in the step (3), the holding time is controlled to be 0.6 h, and the oven temperature is 85°C. In 4), the soaking time is controlled to be 3.0 h; in the step (5), the oven temperature is controlled to be 328° C., and the drying time is controlled to be 10 min.
Embodiment 3
[0023] Example 3: The rest are the same as in Example 1, except that in the step (1), the stirring time is controlled to be 38 min; in the step (3), the holding time is controlled to be 0.6 h, and the oven temperature is 90°C. In 4), the soaking time is controlled to be 3.2 hours; in the step (5), the oven temperature is controlled to be 335° C., and the drying time is controlled to be 11 minutes.
[0024] After the above process steps, the composite film sample is taken out to be tested:
[0025] serial number thermal stability Permittivity change rate / % Corona Resistance Tensile strength / MPa Elongation at break / % Example 1 excellent 2.4 excellent 96.06 13.48 Example 2 excellent 2.3 excellent 95.20 12.98 Example 3 excellent 2.5 excellent 96.13 13.05
[0026] From the above data, it can be seen that the prepared composite film has excellent thermal stability and corona resistance, a small change rate of dielect...
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Abstract
The invention discloses a preparation method of an antibacterial composite film material and relates to the field of plastic thin films. The preparation method comprises the following five technical processes: mixing raw materials; preparing polyamide acid/a precursor; laying a film; preparing a composite thin film; drying the composite thin film. In the preparation method, sol is prepared by adopting a hydrothermal method; the step of converting hydroxide into oxide by calcination in a wet chemical method, which is easy to form hard agglomerates, is avoided; time is saved; efficiency is improved; the preparation effect is good; no other impurities or derived substances are generated; in the process of laying the film, by strictly controlling the temperature and the heat preservation time in an oven, the thin film generating speed is high and the thin film has good quality and high mechanical intensity and is difficult to break by pulling; in the final drying technical process, the prepared composite thin film has excellent performance, adopts a local netty distributed structure, has excellent physical performance and dielectric property, has an obvious corona resistance effect, completely meets the requirements on insulating property of a cable in the electric power industry, and has long service life and good production process stability.
Description
technical field [0001] The invention relates to the field of plastic film manufacture, in particular to a method for preparing an antibacterial composite film material. Background technique [0002] In recent years, people have paid more and more attention to the application of variable frequency motors, but at the same time as this new technology is adopted, a troublesome problem has emerged one after another: in the pulse width modulation variable frequency drive system, due to the wave reflection of the long cable, the motor The overvoltage generated on the terminal, coupled with the extremely uneven distribution of the pulse voltage on the winding group, makes the inter-turn voltage of the winding near the head end tens of times higher than the average distribution voltage, resulting in corona discharge between the winding turns, thus Make the motor insulation break down prematurely. Practice has shown that adding a certain amount of inorganic nano-oxides to the existing...
Claims
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Application Information
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