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Method for preparing polymer/SiO2 nano composite material

A nanocomposite material and polymer technology, which is applied in the field of preparation of polymer/silica nanocomposite materials, can solve the problems of complex process, high cost and unsatisfactory effect, and achieve simple process, suitable for quantitative production, cost low cost effect

Active Publication Date: 2015-07-22
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above modification methods are not suitable for mass production of composite materials due to the complexity of the process, high cost, or unsatisfactory effects.

Method used

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  • Method for preparing polymer/SiO2 nano composite material
  • Method for preparing polymer/SiO2 nano composite material
  • Method for preparing polymer/SiO2 nano composite material

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preparation example Construction

[0029] The present invention provides a polymer / SiO 2 Preparation method of nanocomposite material, polymer and functionalized SiO 2 Preparation of Polymer / SiO by Solution Blending or Melt Blending of Nanoparticles 2 Nanocomposites, polymers and functionalized SiO 2 The mass ratio of nanoparticles is: 100: 1~6 (preferably 100: 1~3);

[0030] Among them, functionalized SiO 2 Nanoparticles for the polymer surface modified SiO 2 Nanoparticles, its preparation method comprises the steps:

[0031] a will nano-SiO 2 Blend with the polymer in a solvent to dissolve the polymer completely, then add a precipitant to precipitate a precipitate, and finally filter and dry the precipitate to obtain the polymer / nano-SiO 2 Premix; among them, the polymer and nano-SiO 2 The mass ratio is: 100:10~20;

[0032] b Melt blending the premix prepared in step a above the melting point of the polymer and below the decomposition temperature for 5 to 30 minutes to obtain the polymer / nanometer SiO...

Embodiment 1

[0047] Example 1PC / functionalized nano-SiO 2 Preparation of composite materials

[0048] 1. Functionalized nano-SiO 2 preparation of

[0049] In this embodiment, the preparation and centrifugation method of the premix are the same as in Comparative Example 1, except that the premix (20 g of it) is melt-blended on a twin-screw extruder for 10 min, wherein the screw speed is 30 rpm and the melting temperature 250°C, granulate after extrusion; the functionalized nanoparticles obtained in this example are referred to as SiO 2 -10.

[0050] The resulting SiO 2 -10 carries out thermogravimetric experiment (method is with comparative example 1), and result is as follows figure 1 shown by figure 1 It can be seen that SiO 2 TGA curve of -10 compared to pristine SiO 2 There are significant differences, and there is an obvious mass loss in the range of 350-550 ° C, indicating that the physical and chemical effects in the process of melt blending for 10 min promote the grafting of...

Embodiment 2

[0057] Embodiment 2PC / functionalized nano-SiO 2 Preparation of composite materials

[0058] 1. Functionalized nano-SiO 2 preparation of

[0059] In this embodiment, except that the melt blending time is 20min, other operations are the same as in Example 1, and the obtained functionalized nanoparticles are referred to as SiO 2 -20, the resulting composite material is PCS20.

[0060] The resulting SiO 2 -20 carries out thermogravimetric experiment (method is with comparative example 1), and result is as follows figure 1 shown by figure 1 It can be seen that compared with pristine SiO 2 , SiO 2 The thermogravimetric curve of -20 shows that it has a more obvious mass loss in the range of 350-550 ° C; however, SiO 2 The thermal degradation temperature and mass loss of -20 are lower than that of SiO 2 -10, indicating that too long melt blending time is not conducive to the increase of polymer grafting rate, mainly because longer melt blending time will lead to an increase i...

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Abstract

The invention relates to a method for preparing an inorganic nanoparticle composite material, and in particular to a method for preparing a polymer / SiO2 nano composite material. The method for preparing the polymer / SiO2 nano composite material comprises the following step: commixing or melt-blending a polymer with functionalized SiO2 nanoparticles, thereby obtaining the polymer / SiO2 nano composite material, wherein the mass ratio of the polymer to the functionalized SiO2 nanoparticles is 100:(1-6), the functionalized SiO2 nanoparticles are polymer surface modified SiO2 nanoparticles, and the polymer molecule chain is chemically grafted to the surface of nano SiO2 through degradation of the polymer in the physical melt commixing process. The method for preparing the polymer-based nano composite material is relatively applicable to quantization production and is simple in process and low in cost.

Description

Technical field: [0001] The invention relates to a preparation method of an inorganic nanoparticle composite material, in particular to a preparation method of a polymer / silicon dioxide nanometer composite material. Background technique: [0002] In order to strengthen, toughen and stiffen the polymer matrix, and to make the polymer exhibit nano-effects, inorganic nanoparticles are usually added to the polymer. However, as far as the nature of nanoparticles is concerned, the high surface energy often leads to the aggregation of nanoparticles, which affects the performance of nanoparticles. In recent years, there have been many studies on the surface modification and dispersion of inorganic nanoparticles, and some corresponding simple and easy dispersion characterization methods have also been produced. The existing modification methods of inorganic nanoparticles mainly include chemical methods and physical methods. Among them, due to the wettability very similar to that of ...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/02C08L67/04C08L33/12C08K9/00C08K9/04C08K3/36C09C1/28C09C3/10
CPCC08K3/36C08K9/00C08K9/04C08K2201/011C09C1/28C09C3/006C09C3/10C08L69/00C08L67/02C08L67/04C08L33/12
Inventor 王波冯跃战陈阳陈薇薇孙瑞洲刘春太申长雨
Owner ZHENGZHOU UNIV
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