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Nylon/polystyrene alloy microsphere, preparation method and applications thereof

A polystyrene and styrene technology, applied in the field of nylon/polystyrene alloy materials, can solve the problems of poor dimensional accuracy and mechanical strength of sintered products, and achieve the effects of simple and controllable preparation methods and improved bulk density.

Active Publication Date: 2017-12-05
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the literature "Selective Laser Sintering of Nylon 6 / Polystyrene System Composite Materials", due to the large difference in melt viscosity and strength between the two powder particles, there is still a serious phase separation between the two phases of the alloy powder after sintering. Dimensional accuracy and mechanical strength of sintered products are poor

Method used

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  • Nylon/polystyrene alloy microsphere, preparation method and applications thereof
  • Nylon/polystyrene alloy microsphere, preparation method and applications thereof
  • Nylon/polystyrene alloy microsphere, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: Preparation of porous nylon 6 microspheres

[0038]Preparation of pore-containing nylon 6 microspheres by dissolution-precipitation method: add 40g of nylon 6 pellets and 240ml of formic acid into the reaction kettle and heat up to 80°C, stir for 2 hours to fully dissolve the material, and then add 400ml of polyethylene with a concentration of 10% g / ml Pyrrolidone (PVP-K30) ethanol solution, stirred vigorously and left to stand, precipitated powder. Suction filtration, washing with ethanol, and vacuum drying to obtain polyamide porous microspheres; the average particle diameter of the obtained nylon 6 microspheres is 60 μm, and the specific surface area is 23 m 2 / g, the porosity is 77%, the pore diameter is 0.1-2μm, and the bulk density is 0.2g / mL. SEM pictures see figure 1 .

Embodiment 2

[0039] Embodiment 2: Preparation of porous nylon 12 microspheres

[0040] Preparation of pore-containing nylon 12 microspheres by dissolution-precipitation method: add 40g of nylon 12 pellets and 240ml of acetic acid into the reaction kettle and heat up to 100°C, stir for 2 hours to fully dissolve the material, and then add 400ml of polyethylene with a concentration of 20% g / ml Pyrrolidone (PVP-K30) ethanol solution, stirred vigorously and left to stand, precipitated powder. Suction filtration, washing with ethanol, and vacuum drying to obtain polyamide porous microspheres; the obtained nylon 12 microspheres have a particle size of 60 μm and a specific surface area of ​​1.1 m 2 / g, porosity 62%, pore diameter 0.1~4μm, bulk density 0.36g / mL. SEM pictures see figure 2 .

[0041] Similarly, other pore-containing nylon 11 microspheres, nylon 1212 microspheres, nylon 612 microspheres, nylon 610 microspheres or nylon 1010 microspheres in the examples of the present invention wer...

Embodiment 3

[0042] Embodiment 3: the preparation of nylon 6 / polystyrene alloy microsphere

[0043] Take 2.5g of nylon 6 porous microspheres and add them to 100g of water and ethanol solution with a mass ratio of 1:1. After ultrasonic dispersion, add 0.1g of ammonium persulfate, pass through nitrogen to discharge oxygen, and when the temperature rises to 45°C, add styrene 7.0 g, and then heated to 75 ° C for 24 hours to stop the reaction, and the obtained product was filtered under reduced pressure, washed with ethanol and dried to obtain microspheres with a mass ratio of nylon 6 to polystyrene of 1:2.80. The particle size of the obtained nylon 6 / polystyrene alloy microspheres remains basically unchanged, the surface is smooth, the porosity is significantly reduced, and there is no obvious phase interface between nylon 6 and polystyrene. SEM pictures see image 3 . The parameters of thermal decomposition temperature, melting temperature and bulk density are shown in Table 1.

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Abstract

The invention discloses a nylon / polystyrene alloy microsphere, a preparation method and applications thereof, wherein the nylon / polystyrene alloy microsphere comprises, by weight, 25-95 wt% of pore-containing nylon microsphere, and 5-75 wt% of polystyrene uniformly dispersed in the pores and / or on the surface of the pore-containing nylon microsphere in a nanometer or micro particle manner or / and in a micro-scale continuous state manner, wherein the alloy microsphere is spherical or nearly spherical particle with a particle size of 0.05-500 [mu]m. According to the present invention, the nylon / polystyrene alloy microsphere can be used in the fields of chromatographic separation, drug delivery and sustained-release, functional coating materials and 3D printing selective laser sintering.

Description

technical field [0001] The invention relates to the technical field of polymer materials. More specifically, it relates to a nylon / polystyrene alloy material. Background technique [0002] Polyamide (PA), commonly known as nylon, is the variety with the largest output, the most varieties, and the widest application among the five major engineering plastics. Among them, PA6 has high tensile strength, good wear resistance and self-lubricating properties, good impact toughness, oil resistance and weak acid resistance. It has the advantages of outstanding alkalinity, but it has great water absorption, poor resistance to strong acid and strong alkali, low impact strength in dry state and low temperature. Polystyrene (polystyrene) is a thermoplastic general-purpose resin whose output is second only to polyethylene, polyvinyl chloride and polypropylene. It has the characteristics of excellent transparency, low cost, rigidity, electrical properties, printing performance and good pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L77/02C08L77/06C08F112/08
Inventor 王格侠孙潇潇刘平季君晖王萍丽王小威卢波甄志超
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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