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Polylactic acid nano fiber and preparation method thereof

A technology of micro-nano fiber and polylactic acid, which is applied in the direction of single-component polyester rayon, etc., can solve the problems that hinder the development and application of polylactic acid materials and the large diameter of polylactic acid fibers, and achieve easy large-scale production and simple preparation methods , high efficiency effect

Inactive Publication Date: 2012-08-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diameters of polylactic acid fibers obtained by these methods are all too large, which hinders the further development and application of polylactic acid materials.

Method used

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  • Polylactic acid nano fiber and preparation method thereof
  • Polylactic acid nano fiber and preparation method thereof
  • Polylactic acid nano fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1800 grams of water-soluble polyester co-PET and 200 grams of polylactic acid were dried in a vacuum oven and blended, and then melted and extruded by a twin-screw spinning machine to obtain polylactic acid / water-soluble polyester blended fibers. Processing temperature: 180°C, the matrix phase component water-soluble polyester in the blended fiber is dissolved in pure water at 85°C for 15 minutes and then removed to obtain polylactic acid micro-nano fiber material. The diameter range of the micro-nano fiber is 50 ~350nm, the average diameter is around 198nm.

Embodiment 2

[0026] After drying in a vacuum oven, 1600 grams of water-soluble polyester co-PET was blended with 400 grams of polylactic acid, and melted and extruded by a twin-screw spinning machine to obtain polylactic acid / water-soluble polyester blended fibers. Processing temperature: 190°C, the matrix phase component water-soluble polyester in the blended fiber is dissolved in pure water at 85°C for 20 minutes and then removed to obtain polylactic acid micro-nano fiber material. The diameter range of the micro-nano fiber is 50 ~400nm, the average diameter is around 239nm.

Embodiment 3

[0028] After drying in a vacuum oven, 1400 grams of water-soluble polyester co-PET was blended with 600 grams of polylactic acid, and then melted and extruded by a twin-screw spinning machine to obtain polylactic acid / water-soluble polyester blended fibers. Processing temperature: 200°C, the matrix phase component water-soluble polyester in the blended fiber is dissolved in pure water at 85°C for 20 minutes and then removed to obtain polylactic acid micro-nano fiber material. The diameter range of the micro-nano fiber is 100 ~450nm, the average diameter is around 284nm.

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Abstract

The invention relates to a polyactic acid nano fiber and a preparation method thereof. The polyactic acid nano fiber is prepared from 100% of polylactic acid; and the preparation method comprises the following steps: (1) blending the polylactic acid with water-soluble polyester, carrying out melting extrusion and winding through a twin screw spinning machine to form polyactic acid / water-soluble polyester blending fiber; and (2) dissolving the polyactic acid blending fiber into a solvent, removing the water-soluble polyester. The diameter range of the fiber of the invention is 50-500nm, and the preparation method is simple and efficient, and is easy to realize scale production.

Description

technical field [0001] The invention belongs to the field of micro-nano fiber and its preparation, in particular to a polylactic acid micro-nano fiber and its preparation method. Background technique [0002] Nanofibers refer to fibers with a diameter of less than 100 nm. In fact, fibers with a diameter of less than 1000 nm obtained by electrospinning or other preparation methods are collectively referred to as nanofibers. Due to the special micro-nano scale effect of nanofibers, it has a wide range of application fields and great commercial value. [0003] The methods for preparing nanofibers include: compound vapor deposition method, template polymerization and molecular design method, and spinning processing method. Among them, compound vapor deposition method is mainly used to prepare inorganic and metal nanofibers; template polymerization and molecular design methods are new methods for preparing nanofibers, but the efficiency is low; spinning processing method should ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/62
Inventor 肖茹刘鹏欧阳炀江霄汉顾莉琴王华平孙刚
Owner DONGHUA UNIV