Preparation method of nano silicon dioxide surface-grafted MC nylon composite material

A nano-silica, nylon composite material technology, applied in the field of polymer nano-composite material preparation, can solve the problems of high surface energy, easy agglomeration, poor compatibility, etc., achieve good modulus, overcome easy agglomeration, high strength Effect

Inactive Publication Date: 2016-08-31
扬州赛尔达尼龙制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its poor compatibility with polymers, large specific surface area, high surface energy, and easy agglomeration, its advantages as nanomaterials cannot be well expressed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of preparation method of nano silicon dioxide surface grafting MC nylon composite material, carry out according to the following steps:

[0016] a. Add nano-silica to a reaction vessel filled with toluene, protect it with nitrogen, add TDI, after ultrasonication for 30min, add 100ulN, N-dimethylcyclohexylamine, magnetically stir, and react at 40°C for 3h to obtain nano-SiO 2 -g-TDI suspension; mass ratio nano silicon dioxide: TDI=1: 0.8;

[0017] b. Add the toluene solution of caprolactam dropwise to SiO 2 -g-TDI suspension, magnetically stirred, reacted at 90°C for 4 hours, centrifuged to remove the lower layer solution, and vacuum dried to obtain nano-SiO 2 -g-CL;

[0018] c, according to parts by weight, 100 parts of caprolactam and 4 parts of nano-SiO prepared by step b 2 -g-CL was put into the reaction container, after vacuuming for 7min, heated to 90°C to melt the caprolactam, protected by nitrogen, and ultrasonicated for 0.3h to obtain nano-SiO 2 -g-CL...

Embodiment 2

[0022] A kind of preparation method of nano silicon dioxide surface grafting MC nylon composite material, carry out according to the following steps:

[0023] a. Add nano-silica to a reaction vessel filled with toluene, protect it with nitrogen, add TDI, after ultrasonication for 20min, add 50ul N,N-dimethylbenzylamine, stir magnetically, and react at 20°C for 4h to obtain nano-SiO 2 -g-TDI suspension; mass ratio nano silicon dioxide: TDI=1: 0.5;

[0024] b. Add the toluene solution of caprolactam dropwise to SiO 2 -g-TDI suspension, magnetically stirred, reacted at 80°C for 6h, centrifuged to remove the lower layer solution, and vacuum dried to obtain nano-SiO 2 -g-CL;

[0025] c, according to parts by weight, 100 parts of caprolactam and 1.5 parts of nano-SiO prepared by step b 2 -g-CL was put into the reaction container, after evacuating for 5 minutes, heated to 80°C to melt the caprolactam, protected by nitrogen, and ultrasonicated for 0.15h to obtain nano-SiO 2 -g-CL ...

Embodiment 3

[0029] A kind of preparation method of nano silicon dioxide surface grafting MC nylon composite material, carry out according to the following steps:

[0030] a. Add nano-silica to a reaction vessel filled with toluene, protect it with nitrogen, add TDI, after ultrasonication for 40 minutes, add 250ul dioctyltin dioctoate solution, stir magnetically, and react at 60°C for 1 hour to obtain nano-SiO 2 -g-TDI suspension; mass ratio nano silicon dioxide: TDI=1: 1;

[0031] b. Add the toluene solution of caprolactam dropwise to SiO 2 -g-TDI suspension, magnetically stirred, reacted at 100°C for 6h, centrifuged to take the lower layer solution, and vacuum dried to obtain nano-SiO 2 -g-CL;

[0032] c, according to parts by weight, the nano-SiO prepared by 100 parts of caprolactam and 7 parts of b step polymerization 2 -g-CL was put into the reaction container, after vacuuming for 10min, heated to 100°C to melt the caprolactam, protected by nitrogen, and ultrasonicated for 0.5h to ...

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Abstract

The invention discloses a preparation method of a nano silicon dioxide surface-grafted MC nylon composite material and belongs to the technical field of preparation of high-molecular nano composite materials. In the method, a nano silicon dioxide surface-grafted caprolactam monomer is employed as an activator to overcome a problem that the nano silicon dioxide is liable to agglomerate in a polyamide substrate. Sodium caprolactam is employed as an initiator to solve the problems of low activity, low dissolubility and polymerization inhibition during usage of a common initiator. Through an in-situ polymerization method, the nano silicon dioxide surface-grafted MC nylon composite material is prepared, and under the effect of ultrasonic wave, the nano silicon dioxide, in the form of original status, is uniformly dispersed in the caprolactam monomer, so that the self-characteristics of the nano silicon dioxide and the substrate are maintained. The method is simple. The composite material is suitable for production of large-size parts, such as a pulley, a bearing, a lining board, a pipe material and the like, can replace metal materials in more industries, and has excellent and wide industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer nanocomposite materials, and in particular relates to a preparation method of nano silicon dioxide surface-grafted MC nylon composite materials. Background technique [0002] MC nylon, also known as cast nylon, is one of the excellent engineering plastics. Compared with ordinary nylon 6, it has unique characteristics: firstly, the production process is simple, the cost is low, no complicated production equipment is required, the process is simple, and the mold making is easy. Secondly, it is superior to ordinary nylon 6 products in terms of strength, stiffness, wear resistance and chemical resistance. Furthermore, the cast nylon molded product is not limited in size and has no directionality. Due to these advantages, cast nylon products are widely used in industries such as automobiles, electrical and electronic, machinery, and construction. However, cast nylon also has some disa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/16C08K9/04C08K3/36
CPCC08G69/16C08K3/36C08K9/04C08K2201/011
Inventor 朱海霞沈国春夏和生张玉蓉高静萍赵晓文闫东广张超
Owner 扬州赛尔达尼龙制造有限公司
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