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Nanofiber modified PBT composite material and preparation method and application thereof

A nanofiber and composite material technology, applied in the field of nanofiber modified PBT composite material and its preparation, can solve the problems of low notched impact strength, high shrinkage rate, poor dimensional stability, etc., and achieve improved dimensional stability and low shrinkage rate , the effect of increasing strength

Active Publication Date: 2022-05-13
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a nanofiber modified PBT composite material and its preparation method and application to solve the technical problems of high shrinkage, poor dimensional stability and low notched impact strength existing in PBT materials

Method used

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  • Nanofiber modified PBT composite material and preparation method and application thereof
  • Nanofiber modified PBT composite material and preparation method and application thereof
  • Nanofiber modified PBT composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A nanofiber modified PBT composite material, which can be applied to home appliance parts, comprises the following preparation steps:

[0044] (1) Dry the nanocellulose and PBT resin in a blast drying oven for 4 hours at a drying temperature of 80°C;

[0045] (2) Put 55kg of PBT resin, 5kg of PABT resin, 10kg of PE resin, 3kg of compatibilizer, 2kg of lubricant and 0.2kg of antioxidant into the high mixer, mix for 3min, and rotate at 500rpm;

[0046] (3) 10kg of nanocellulose and 15kg of glass fiber are added by double-side feeding, and the above-mentioned raw materials are extruded and pelletized through a twin-screw extruder and a pelletizer in turn, and the temperature of the extruder is 230°C. Nanofiber reinforced PBT composites;

[0047] Among them, the PBT resin is specifically selected from GX111; the PBAT resin is specifically selected from TH801; the nanocellulose is specifically cellulose nanocrystals; the glass fiber is alkali-free glass fiber; the compatibi...

Embodiment 2

[0049] A nanofiber modified PBT composite material, which can be applied to home appliance parts, comprises the following preparation steps:

[0050] (1) Place the nanocellulose and PBT resin in a blast drying oven to dry for 5 hours at a drying temperature of 90°C;

[0051] (2) Put 40kg of PBT resin, 15kg of PABT resin, 5kg of PE resin, 5kg of compatibilizer, 1kg of lubricant and 0.3kg of antioxidant into the high mixer, mix for 4min, and rotate at 400rpm;

[0052] (3) 5kg of nanocellulose and 30kg of glass fiber are added by double-side feeding, and the above-mentioned raw materials are extruded and pelletized through a twin-screw extruder and a pelletizer in turn, and the temperature of the extruder is 240°C. Nanofiber reinforced PBT composites;

[0053]Among them, the PBT resin is specifically selected from GX110; the PBAT resin is specifically selected from Zhuhai Wantong's A400 NC901; the nanocellulose is specifically cellulose nanofibrils (CNF); the glass fiber is alka...

Embodiment 3

[0055] A nanofiber modified PBT composite material, which can be applied to home appliance parts, comprises the following preparation steps:

[0056] (1) Place the nanocellulose and PBT resin in a blast drying oven to dry for 5 hours at a drying temperature of 80°C;

[0057] (2) Put 45kg of PBT resin, 10kg of PABT resin, 7kg of PE resin, 4kg of compatibilizer, 0.5kg of lubricant and 0.5kg of antioxidant into the high mixer, mix for 5min, and rotate at 300rpm;

[0058] (3) 8kg of nanocellulose and 25kg of glass fiber are added by double-side feeding, and the above-mentioned raw materials are extruded and pelletized through a twin-screw extruder and a pelletizer in turn, and the temperature of the extruder is 250°C. Nanofiber reinforced PBT composites;

[0059] Among them, the PBT resin is specifically selected from GX112; the PBAT resin is specifically selected from Zhuhai Wantong's A400 NC901; the nanocellulose is specifically cellulose nanocrystals; the glass fiber is alkali...

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Abstract

The invention discloses a nanofiber modified PBT composite material as well as a preparation method and application thereof, and relates to the field of composite materials. The composite material comprises the following components in parts by weight: 40-55 parts of PBT resin; 5 to 15 parts of PBAT resin; 5 to 10 parts of PE resin; 5 to 10 parts of nano cellulose; 15 to 30 parts of glass fiber; 3 to 5 parts of a compatilizer; 0.1 to 2 parts of a lubricant; and 0.2 to 0.5 part of an antioxidant. The toughness of the material is improved through the PBAT resin, the PE resin affects crystallization of PBT to reduce shrinkage and improve dimensional stability, and meanwhile, the nano cellulose and the glass fiber increase the strength of the composite material, so that the composite material has low shrinkage and high notch impact strength, the bending strength is not obviously reduced, the raw materials are environment-friendly and easy to obtain, the preparation process is simple, and the preparation cost is low. The method is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a nanofiber modified PBT composite material and a preparation method and application thereof. Background technique [0002] Polybutylene terephthalate (PBT) is an important thermoplastic engineering plastic, widely used in automobiles, electronics, electrical appliances and other industries. It has high crystallinity and crystallization rate, good chemical resistance and excellent processing performance, and has become an important member of the five general engineering plastics. However, there are some problems in PBT itself, and the notch impact is low, so the further expansion of its application range is limited. [0003] In order to improve the performance of PBT, blending and modifying it is the most effective way to toughen PBT. It uses the principle of compatibility between components to combine PBT with one or more other additives. Melt blending at a certain temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/08C08L1/02C08L1/04C08K7/14
CPCC08L67/02C08L2205/025C08L2205/035C08L23/0815C08L1/02C08K7/14C08L1/04
Inventor 徐冲陈平绪叶南飚付锦锋胡志华李诚汪海罗鹏
Owner KINGFA SCI & TECH CO LTD