Resource-renewable and biodegradable conductive fiber and preparation method thereof

Abstract

The invention discloses resource-renewable and biodegradable conductive fiber and a preparation method thereof. The fiber consists of the following raw materials in parts by weight: 30-70 parts of polylactic acid (PLA), 30-70 parts of poly(3-hydroxybutyric acid-co-3-hydroxyvalerate (PHBV) and 0.05-8 parts of conductive filler. The preparation method of the conductive fiber comprises the following steps of: (1) proportionally pre-mixing PHBV (if PLA is not less than 50 parts) or PLA (if PLA is less than 50 parts) and the conductive filler, and performing melt blending and granulation to obtain the conductive master batch of the PHBV or PLA; (2) proportionally pre-mixing the PLA or PHBV and the conductive master batch of the PHBV or PLA, and performing melt blending and granulation to obtain composite conductive mater batches; and (3) spinning and drafting the composite conductive master batches one by one to obtain the conductive fiber. The conductive fiber disclosed by the invention can be used as the material for electrodes, static resistance, low-temperature heating, electromagnetic shielding, thermal sensitivity, gas sensitivity and the like.

Description

technical field

[0001] The invention relates to the field of polymer materials, in particular to renewable resource, biodegradable conductive fibers and a preparation method thereof. Background technique

[0002] my country is a big country of fiber production. The output of synthetic fiber has ranked first in the world for 15 consecutive years. The total value of fiber and its textiles accounts for about 10% of my country's GDP, and exports account for 1 / 4, which is very important in the national economy. At present, the development of synthetic fibers in my country has the following problems: First, the development of synthetic fibers is restricted by the shortage of resources, and more than 90% of the raw materials of synthetic fibers depend on oil, and the total amount of proven oil and the consumption rate are calculated , 50 years later, fiber and its related industries will be in a state of "cooking without rice"; secondly, the development of synthetic fibers is restric...

Examples

Embodiment 1

[0025] (1) PLA (the content of D-lactic acid unit is 2.0mol% at first, and the viscosity-average molecular weight is 2.0×10 5 ), PHBV (the content of HV unit is 2.5%, the viscosity average molecular weight is 3.9×10 5 ) and carbon black were dried in a vacuum oven for 12 hours at a temperature of 80°C; 50 parts of PHBV and 4 parts of carbon black were put into a high-speed mixer for dry mixing for 3 minutes, and then blended and granulated in a twin-screw blender. To obtain PHBV conductive masterbatch, the granulation temperature is 170°C, the screw speed is 75rmp, and the melt blending time is 3 minutes; 50 parts of PLA and the obtained PHBV conductive masterbatch are put into a high-speed mixer and dry mixed for 3 minutes. The conductive masterbatch was obtained by blending and granulating on a twin-screw blender. The melt blending temperature was 170° C., the rotation speed was 75 rpm, and the melt blending time was 8 minutes.

[0026] (2) Spin the conductive masterbatch o...

Embodiment 2

[0029] (1) PLA (the content of D-lactic acid unit is 2.5mol% at first, and viscosity-average molecular weight is 2.2 * 10 5 ), PHBV (the content of HV unit is 5.7%, the viscosity average molecular weight is 2.9×10 5 ) and MWCNTs were dried in a vacuum oven for 24 hours at a temperature of 60°C; 40 parts of PHBV and 3.5 parts of MWCNTs were put into a high-speed mixer for 5 minutes, and then blended and granulated in a twin-screw blender to obtain PHBV Conductive masterbatch, the granulation temperature is 175°C, the screw speed is 65rmp, and the melt blending time is 3 minutes; 60 parts of PLA and the obtained PHBV conductive masterbatch are put into a high-speed mixer for 5 minutes, and then mixed in a twin-screw Blending and granulation on a blender to obtain conductive masterbatches, the melt blending temperature is 180° C., the rotation speed is 60 rpm, and the melt blending time is 6 minutes.

[0030] (2) Spin the conductive masterbatch on a melt spinning machine to obta...

Embodiment 3

[0033] (1) PLA (the content of D-lactic acid unit is 2.0mol% at first, and the viscosity-average molecular weight is 2.0×10 5 ), PHBV (the content of HV unit is 8.5%, the viscosity average molecular weight is 3.2×10 5) and SWCNTs were dried in a vacuum oven for 12 hours at a temperature of 80°C; 40 parts of PLA and 3 parts of SWCNTs were put into a high-speed mixer for 3 minutes, and then blended and granulated in a twin-screw blender to obtain PLA Conductive masterbatch, the granulation temperature is 170°C, the screw speed is 85rmp, and the melt blending time is 6 minutes; 60 parts of PHBV and the obtained PLA conductive masterbatch are put into a high-speed mixer for 3 minutes, and then mixed in a twin-screw Blending and granulation on a blender to obtain conductive masterbatch, the melt blending temperature is 180° C., the rotation speed is 75 rpm, and the melt blending time is 6 minutes.

[0034] (2) Spin the conductive masterbatch on a melt spinning machine to obtain co...

technical field

[0001] The invention relates to the field of polymer materials, in particular to renewable resource, biodegradable conductive fibers and a preparation method thereof. Background technique

[0002] my country is a big country of fiber production. The output of synthetic fiber has ranked first in the world for 15 consecutive years. The total value of fiber and its textiles accounts for about 10% of my country's GDP, and exports account for 1 / 4, which is very important in the national economy. At present, the development of synthetic fibers in my country has the following problems: First, the development of synthetic fibers is restricted by the shortage of resources, and more than 90% of the raw materials of synthetic fibers depend on oil, and the total amount of proven oil and the consumption rate are calculated , 50 years later, fiber and its related industries will be in a state of "cooking without rice"; secondly, the development of synthetic fibers is restric...

Examples

Embodiment 1

[0025] (1) PLA (the content of D-lactic acid unit is 2.0mol% at first, and the viscosity-average molecular weight is 2.0×10 5 ), PHBV (the content of HV unit is 2.5%, the viscosity average molecular weight is 3.9×10 5 ) and carbon black were dried in a vacuum oven for 12 hours at a temperature of 80°C; 50 parts of PHBV and 4 parts of carbon black were put into a high-speed mixer for dry mixing for 3 minutes, and then blended and granulated in a twin-screw blender. To obtain PHBV conductive masterbatch, the granulation temperature is 170°C, the screw speed is 75rmp, and the melt blending time is 3 minutes; 50 parts of PLA and the obtained PHBV conductive masterbatch are put into a high-speed mixer and dry mixed for 3 minutes. The conductive masterbatch was obtained by blending and granulating on a twin-screw blender. The melt blending temperature was 170° C., the rotation speed was 75 rpm, and the melt blending time was 8 minutes.

[0026] (2) Spin the conductive masterbatch o...

Embodiment 2

[0029] (1) PLA (the content of D-lactic acid unit is 2.5mol% at first, and viscosity-average molecular weight is 2.2 * 10 5 ), PHBV (the content of HV unit is 5.7%, the viscosity average molecular weight is 2.9×10 5 ) and MWCNTs were dried in a vacuum oven for 24 hours at a temperature of 60°C; 40 parts of PHBV and 3.5 parts of MWCNTs were put into a high-speed mixer for 5 minutes, and then blended and granulated in a twin-screw blender to obtain PHBV Conductive masterbatch, the granulation temperature is 175°C, the screw speed is 65rmp, and the melt blending time is 3 minutes; 60 parts of PLA and the obtained PHBV conductive masterbatch are put into a high-speed mixer for 5 minutes, and then mixed in a twin-screw Blending and granulation on a blender to obtain conductive masterbatches, the melt blending temperature is 180° C., the rotation speed is 60 rpm, and the melt blending time is 6 minutes.

[0030] (2) Spin the conductive masterbatch on a melt spinning machine to obta...

Embodiment 3

[0033] (1) PLA (the content of D-lactic acid unit is 2.0mol% at first, and the viscosity-average molecular weight is 2.0×10 5 ), PHBV (the content of HV unit is 8.5%, the viscosity average molecular weight is 3.2×10 5) and SWCNTs were dried in a vacuum oven for 12 hours at a temperature of 80°C; 40 parts of PLA and 3 parts of SWCNTs were put into a high-speed mixer for 3 minutes, and then blended and granulated in a twin-screw blender to obtain PLA Conductive masterbatch, the granulation temperature is 170°C, the screw speed is 85rmp, and the melt blending time is 6 minutes; 60 parts of PHBV and the obtained PLA conductive masterbatch are put into a high-speed mixer for 3 minutes, and then mixed in a twin-screw Blending and granulation on a blender to obtain conductive masterbatch, the melt blending temperature is 180° C., the rotation speed is 75 rpm, and the melt blending time is 6 minutes.

[0034] (2) Spin the conductive masterbatch on a melt spinning machine to obtain co...