Method for modifying and preparing nano-silicon dioxide composite antioxidant in situ

A technology of nano-silica and composite antioxidants, which is applied in the field of in-situ modification to prepare nano-silica composite antioxidants, can solve complex and hard agglomerate process problems, achieve uniform particle size, advanced technology, Informative and accurate data

Active Publication Date: 2018-09-14
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problems of hard agglomerates and complex processes in the process of pyrolysis and preparation of nano-silica dur

Method used

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  • Method for modifying and preparing nano-silicon dioxide composite antioxidant in situ
  • Method for modifying and preparing nano-silicon dioxide composite antioxidant in situ
  • Method for modifying and preparing nano-silicon dioxide composite antioxidant in situ

Examples

Experimental program
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Embodiment 1

[0042] Example 1 A method for preparing nano-silica composite antioxidant by in-situ modification. The chemical materials used are: tetraethyl orthosilicate, ammonia water with a concentration of 25% in terms of mass fraction, absolute ethanol, and acetone , Antioxidant 1330, deionized water.

[0043] The preparation method is as follows:

[0044] (1) Selection of various chemical substances and materials

[0045] (2) Preparation of nano-silica composite antioxidant by in-situ modification

[0046] ① Prepare the solution

[0047] Measure 51ml of absolute ethanol and place it in a beaker for use; measure 29ml of ammonia water and place it in a conical flask with a rubber stopper for use; measure 5ml of tetraethyl orthosilicate and 50ml of absolute ethanol and place it in a beaker Mix, stir with a glass rod to make it evenly mixed and set aside; measure 45mg of antioxidant 1330 and dissolve it in 150ml of acetone, stir evenly to prepare an acetone solution, and place it in a ...

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Abstract

The invention discloses a method for modifying and preparing a nano-silicon dioxide composite antioxidant in situ. According to the method, on one hand, the use temperature of an antioxidant 1330 is increased, and on the other hand, the method solves the problems of poor dispersibility of nano-silicon dioxide, complicated of secondary dispersion modification process, high energy consumption and severe pollution. The nano-silicon dioxide composite antioxidant with uniform particle diameters and excellent appearances is in-situ modified and prepared by the aid of techniques such as functional groups, dosage, feeding temperature, feeding time and reaction conditions of the antioxidant based on sol-gel technique. The modifying and preparing method is advanced in process, detailed and accuratein data and quire ideal, products are provided with white powder particles, the particle diameter ranges from 80 nm to 120nm, and the method is applied to various fields of high-polymer antioxidant, reinforcing and toughening, industrial coatings and the like.

Description

technical field [0001] The invention relates to a method for in-situ modification to prepare a nano-silica composite antioxidant, which belongs to the technical field of preparation and application of inorganic nano-materials. Background technique [0002] Antioxidant 1330 is a high-molecular-weight multi-component hindered phenolic antioxidant. It has the characteristics of no pollution, no coloring, and low volatility. It is an excellent antioxidant for high-density polyethylene, polypropylene, and rubber. It is mostly used in polyvinyl chloride, Plastic products such as polyamide, ABS resin and polyester. However, its melting point is about 240°C, and it is easy to decompose during processing, which affects the processing and product quality. [0003] Nano silica has good thermal stability, thickening and reinforcing properties. It is widely used in the modification of composite materials such as rubber, engineering plastics, biomedicine, ceramics, building materials, a...

Claims

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Application Information

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IPC IPC(8): C08K3/22C08K5/13
CPCC08K3/22C08K5/13C08K2003/2241C08K2201/003C08K2201/011
Inventor 连丹丹卢建军张蕊萍戴晋明牛梅韩汶欣任靖屹
Owner TAIYUAN UNIV OF TECH
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