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Carbon nanotube/polylactic acid conductive composite material and preparation method

A technology of conductive composite materials and carbon nanotubes, which is applied in the field of polymer materials, can solve problems such as complex processing conditions and unsatisfactory material conductivity, and achieve the effects of easy operation and control, reduced addition amount, and simple process conditions

Active Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since carbon nanotubes are prone to agglomeration, surface treatment of carbon nanotubes is often required. Compared with traditional processes, the processing conditions are more complicated, and the conductivity of the obtained materials is not ideal. It is necessary to add more carbon nanotubes to significantly improve the material. The conductive performance improves the cost

Method used

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  • Carbon nanotube/polylactic acid conductive composite material and preparation method
  • Carbon nanotube/polylactic acid conductive composite material and preparation method

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Experimental program
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Embodiment 1～13

[0027] (1) PLLA (provided by Natureworks, brand 3051D) and PDLA (provided by Purac) were vacuum-dried at 80°C for 5 h, and then PLLA and CNTs (MWNTs, provided by Cheaptubes, diameter 20-30 nm, length 20-30 μm) and anti- The weight of oxygen agent (tetra[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and tri(2,4-di-tert-butyl) phenyl phosphite ratio of 1:1) in a Haake torque rheometer at 190°C and 60rpm for 10 minutes to obtain a CNTs / PLLA masterbatch, and then melt blended the masterbatch and PDLA at 220°C and 60rpm for 10 minutes to obtain CNTs / PLLA / PDLA composites. The material ratio of each embodiment is shown in Table 1.

[0028](2) The CNTs / PLLA / PDLA composite material after melt blending is molded into a circular sample with a diameter of 10cm and a thickness of 1.5mm for electrical performance testing. The test instrument is a PC68 megger, and the test standard is GB T 1410- In 2006, the measured volume resistivity and electrical conduc...

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Abstract

The invention discloses a carbon nanotube / polylactic acid conductive composite material and a preparation method; the conductive composite material comprises the following blended components: levorotatory polylactic acid resin, and dextrorotatory polylactic acid resin, carbon nanotube and an anti-oxidant; the using amount of the carbon nanotube is 0.2-3 parts by weight; the weight ratio of the levorotatory polylactic acid resin and the dextrorotatory polylactic acid resin is (80-50):(20-50). The method comprises the following steps: performing melt blending of the levorotatory polylactic acid resin, the carbon nanotube, and the anti-oxidant according to the using amounts to prepare a master batch, then performing melt blending with the dextrorotatory polylactic acid resin to prepare the carbon nanotube / polylactic acid conductive composite material. The conductive composite material of the invention is added with a few CNTs, and thus the material is provided with good conductivity; the conductive percolation threshold is significantly reduced to 0.5 wt%; the operation process is simple, and is suitable for continuous mass production.

Description

technical field [0001] The invention belongs to the field of polymer materials, and furthermore, relates to a carbon nanotube / polylactic acid conductive composite material and a preparation method thereof. Background technique [0002] With the increasing application of polymer materials and people's increasing concern about environmental issues, the environmental pollution caused by the refractory nature of daily polymer materials has become a problem that human beings must solve. The development and utilization of biodegradable polymer materials is one of the effective solutions to this problem. Polylactic acid (PLA) is a polymer with excellent performance, biocompatibility and biodegradability. The enzymes in the body decompose and replace, and the final decomposition products are carbon dioxide and water, which will not pollute the environment. Therefore, it can be used not only in the fields of general materials such as films, containers, textiles, and packaging materi...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K13/04C08K7/00C08K3/04C08K5/134C08K5/526
Inventor 权慧张师军乔金樑张丽英刘建叶初立秋王湘白奕青
Owner CHINA PETROLEUM & CHEM CORP
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