Preparation method of high-performance nylon nanocomposite

Abstract

The invention discloses a preparation method of a high-performance nylon nanocomposite. The method comprises the steps as follows: self-made nano SiO2 is used as filler, firstly, the nano SiO2 spheresurface is grafted with a polyamino acid molecular chain with chemical structure characteristics similar to nylon through macromolecular design, and the dual network structure function of a particle physical network and a grafting molecular chain and matrix molecular chain entanglement network is expected to be played, so that uniform dispersion of nanoparticles in a polymer matrix and the good interface interaction between the nanoparticles and the matrix material are realized. Then, macromolecular modified SiO2 is added to nylon for melt blending, and a novel high-performance nylon nanocomposite with wide application prospects is developed.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials, and specifically relates to a method for preparing a high-performance nylon nano composite material. Background technique [0002] Nanomaterials are used in polymers, which can perfectly combine the rigidity, dimensional stability and thermal stability of inorganic substances with the toughness, processability and dielectric properties of polymers to obtain composite materials with excellent performance. Although nanomaterials can comprehensively improve the comprehensive properties of polymers, they can also give them unique physical and chemical properties. However, due to the small particle size and high surface energy of nanoparticles, they are easy to agglomerate to form secondary particles, resulting in poor dispersion of nanoparticles in polymers and unable to show the favored surface area effect, volume effect, and quantum size effect. Seriously affect its use effect. In actual pro...

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Problems solved by technology

Both of these methods are used in polymer nanocomposites, but they also have their own advantages and disadvantages: "Grafting from" can precisely control the molecular weight and grafting density of polymer molecular chains grafted on the surface of particles. For example, many research groups Active polymerization methods, such as atom transfer radical polymerization (ATRP), can precisely control the properties of molecular chains grafted on the particle surface. "Grafting from" methods often use ring-opening polymerization, polycondensation and other methods to introduce macromolecular chains on the particle surface. , can use bulk reaction or solution reaction

[0007] The preparation method of the nano composite material of nylon is more, and CN102382452A discloses a kind of preparation method of nano modified nylon composite material, and its described nano modifier is polyhedral oligomeric siloxane (POSS), and its nano The material has high toughness and strength; however, the price of its nano-modifier POSS is high, and the cost of industrialized materials is relatively high

CN106009639A discloses a kind of preparation method of nano-nylon composite material, its nano-material has selected nano-sepiolite, has developed a kind of higher intensity and has the nano-nylon composite material of insulating effect; But it only uses coupling agent silane Modification of nanomaterials, the modification effect is limited, so the mechanical properties of nanomaterials are limited

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