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Modified nano cerium oxide, preparation method thereof, modified nano cerium oxide flame-retardant polyformaldehyde and preparation method thereof

A technology of nano-cerium oxide and polyoxymethylene, applied in the fields of modified nano-cerium oxide and its preparation, modified nano-cerium oxide flame-retardant polyoxymethylene and its preparation, can solve the problems of poor dispersion and easy agglomeration of nano-cerium oxide, and achieve Enhanced compatibility, improved dispersibility, and improved flame retardant properties

Pending Publication Date: 2020-07-31
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide modified nano cerium oxide and its preparation method and modified nano cerium oxide flame retardant polyoxymethylene and its preparation method, using modifier to modify cerium oxide to improve the easy agglomeration and dispersion of nano cerium oxide Poor performance and other problems, while further improving the flame retardant performance of nano-cerium oxide on polyoxymethylene

Method used

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  • Modified nano cerium oxide, preparation method thereof, modified nano cerium oxide flame-retardant polyformaldehyde and preparation method thereof
  • Modified nano cerium oxide, preparation method thereof, modified nano cerium oxide flame-retardant polyformaldehyde and preparation method thereof
  • Modified nano cerium oxide, preparation method thereof, modified nano cerium oxide flame-retardant polyformaldehyde and preparation method thereof

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Embodiment 1

[0054] This embodiment provides a modified nano-cerium oxide, including a modifier, nano-cerium oxide, deionized water and ethanol, wherein the modifier is polyethylene glycol, stearic acid, sodium dodecylsulfonate, Any one or a combination of sodium lauryl sulfate, KH550 and KH570, the mass of the modifier is 1% to 7% of the mass of nano cerium oxide.

[0055] Unmodified nano cerium oxide has the characteristics of easy aggregation, hydrophilic and oleophobic, and poor compatibility with polyoxymethylene and other polymers; the modified nano cerium oxide provided in this example has obviously improved its dispersibility after modification, The compatibility with polyoxymethylene is also significantly improved, improving its flame retardant performance against polyoxymethylene.

Embodiment 2

[0057] see figure 1 As shown, the present embodiment provides a preparation method of modified nano-cerium oxide, comprising the following steps:

[0058] S1: Mix a certain proportion of deionized water and ethanol to prepare a solvent. In this embodiment, the ratio of deionized water and ethanol is 1:1 to 2:1;

[0059] S2: Weigh a certain dose of modifier and place it in the solvent prepared in step S1 to dissolve it to obtain a modifier solution. In this embodiment, a high-speed disperser is used to fully stir so that the modifier is fully Dissolving, the modifying agent is any one or a combination of polyethylene glycol, stearic acid, sodium lauryl sulfate, sodium lauryl sulfate, KH550 and KH570;

[0060] S3: Weighing a certain dose of nano-cerium oxide, placing it in a certain dose of the solvent prepared in step S1, and heating it in a water bath to a temperature of 50-70° C. to obtain a nano-cerium oxide solution;

[0061] In this embodiment, a certain dose of nano ce...

Embodiment 3

[0066] This embodiment provides a modified nano-cerium oxide flame-retardant polyoxymethylene, including the modified nano-cerium oxide and polyoxymethylene described in Example 1, and the quality of the modified nano-cerium oxide is 0.5% to 10% of the mass of polyoxymethylene . In this example, the flame retardancy of polyoxymethylene was significantly improved by adding modified nano-cerium oxide.

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Abstract

The invention discloses modified nano cerium oxide which comprises a modifier, nano cerium oxide, deionized water and ethanol, wherein the modifier is any one or a combination of more of polyethyleneglycol, stearic acid, sodium dodecyl sulfate, lauryl sodium sulfate, KH550 and KH570; the mass of the modifier is 1%-7% of the mass of the nano cerium oxide, and the unmodified nano cerium oxide has the characteristics of easiness in agglomeration, hydrophilicity, oleophobicity and poor compatibility with polymers such as polyformaldehyde; after modification, the dispersity is obviously improved,the compatibility with polyformaldehyde is also obviously improved, and the flame retardance to polyformaldehyde is improved.

Description

technical field [0001] The invention belongs to the field of inorganic flame retardant modification and flame retardant application, and in particular relates to modified nano cerium oxide and a preparation method thereof, and modified nano cerium oxide flame retardant polyoxymethylene and a preparation method thereof. Background technique [0002] As an engineering plastic with excellent comprehensive properties, polyoxymethylene has high mechanical properties, elastic modulus, stiffness and hardness, and is widely used in electrical appliances, automobiles and other fields. However, because of its limiting oxygen index of only 15%, polyoxymethylene is extremely flammable (Ma Xiaofeng. Plastic Industry, 2017, 45(10): 113-116), which limits its development and application in certain fields, so research on polyoxymethylene The flame retardancy is of great significance. The flame retardancy of polyoxymethylene is mainly achieved by adding various flame retardants (Zhang Qing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K9/06C08K3/22C08L59/02C09C1/00C09C3/04C09C3/08C09C3/10C09C3/12
CPCC08K3/22C08K9/04C08K9/06C08K2003/2213C08K2201/011C08L2201/02C09C1/00C09C3/006C09C3/04C09C3/043C09C3/08C09C3/10C09C3/12C08L59/02
Inventor 刘惠平刘宇婷王晗王雪晨
Owner SHANGHAI INST OF TECH
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