A kind of high flexibility polylactic acid fiber composite material and its preparation method

A polylactic acid fiber and composite material technology is applied in the field of biodegradable polymer materials to achieve the effects of improved flexibility, improved high temperature stability and compatibility, and improved anti-degradation ability

Active Publication Date: 2018-12-18
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no special research on the softness of polyester modified PLA fibers has been reported, and the present invention has important research significance and application value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 80 parts of polylactic acid (PLA), 20 parts of polytrimethylene adipate (PPA), 0.5 parts of polycarbodiimide (PCDI), and 0.5 parts of tetrabutyl titanate.

[0026] (1) The blend modified polylactic acid fiber was prepared by the following method: 40 parts of PLA resin was vacuum-dried at 60°C for 24 hours, and then PLA (40 parts) / PPA (20 parts) / PCDI (0.5 parts ) / TT-01 (0.5 parts) were uniformly mixed, added to a twin-screw extruder for melt blending to prepare spinning chips, and the extrusion temperature was 160°C;

[0027] (2) Preparation of polylactic acid and its blended fibers: 40 parts of PLA and PLA (40 parts) / PPA (20 parts) / PCDI (0.5 parts) / TT-01 (0.5 parts) prepared in step (1) were combined The mixed slices were dried in a vacuum oven at 90 °C for 48 h, and then fibers were prepared by a two-step melt spinning-drawing method. Among them, the spinneret has 24 holes, the hole diameter is 0.3 mm, and the spinneret hole length-to-diameter ratio (L / D) is 3. Then ...

Embodiment 2

[0030] 70 parts of polylactic acid (PLA), 30 parts of polytrimethylene adipate (PPA), 0.1 part of polycarbodiimide (PCDI), 0.1 part of tetrabutyl titanate.

[0031] (1) The blend modified polylactic acid fiber was prepared by the following method: 35 parts of PLA resin was vacuum-dried at 60°C for 24 hours, and then PLA (35 parts) / PPA (30 parts) / PCDI (0.1 part ) / TT-01 (0.1 parts) were uniformly mixed, added to a twin-screw extruder for melt blending to prepare spinning chips, and the extrusion temperature was 150°C;

[0032] (2) Preparation of polylactic acid and its blended fibers: 35 parts of PLA and PLA (35 parts) / PPA (30 parts) / PCDI (0.1 parts) / TT-01 (0.1 parts) prepared in step (1) were combined The mixed slices were dried in a vacuum oven at 90 °C for 48 h, and then fibers were prepared by a two-step melt spinning-drawing method. Among them, the spinneret has 24 holes, the hole diameter is 0.3 mm, and the spinneret hole length-to-diameter ratio (L / D) is 3. Then spin th...

Embodiment 3

[0034] 90 parts of polylactic acid (PLA), 10 parts of polytrimethylene adipate (PPA), 1 part of polycarbodiimide (PCDI), 1 part of tetrabutyl titanate.

[0035] (1) The blend modified polylactic acid fiber was prepared by the following method: 45 parts of PLA resin was vacuum-dried at 60°C for 24 hours, and then PLA (45 parts) / PPA (10 parts) / PCDI (1 part ) / TT-01 (1 part) mixed evenly, added to a twin-screw extruder for melt blending to prepare spinning chips, and the extrusion temperature was 180°C;

[0036] (2) Preparation of polylactic acid and its blended fibers: 45 parts of PLA and PLA (45 parts) / PPA (10 parts) / PCDI (1 part) / TT-01 (1 part) prepared in step (1) were combined The mixed slices were dried in a vacuum oven at 90 °C for 48 h, and then fibers were prepared by a two-step melt spinning-drawing method. Among them, the spinneret has 24 holes, the hole diameter is 0.3 mm, and the spinneret hole length-to-diameter ratio (L / D) is 3. Then spin through a spinning machin...

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Abstract

The invention relates to a high flexibility polylactic acid fiber composite material and a preparation method thereof. The composite material comprises the following components in parts by weight: polylactic acid (PLA) 70-90 parts, polytrimethylene adipate (PPA) 1 Part-30 parts, Polycarbodiimide (PCDI) 0.1-1 part, Tetrabutyl titanate (TT-01) 0.1-1 part. The present invention uses multifunctional PCDI and TT-01 as reactive compatibilizers to modify PLA / PPA blends. PCDI can well improve the high-temperature stability and compatibility of materials, and the processing performance will also be improved. After the addition of PCDI, the breaking strength and elastic modulus of PLA / PPA blend fibers were reduced, the elongation at break was significantly increased, and the softness was improved. The addition of TT-01 promotes the transesterification reaction between PLA and PPA, thereby further improving the stability and compatibility of the product.

Description

technical field [0001] The invention relates to the technical field of biodegradable polymer materials, in particular to a high flexibility polylactic acid fiber composite material and a preparation method thereof. Background technique [0002] As a new type of environmentally friendly fiber, polylactic acid / polypropylene adipate (PLA / PPA) fiber has the advantages of good mechanical properties, degradability, good biocompatibility and low production energy consumption, but in a certain In fields such as medicine, packaging and cable coating, due to the poor compatibility of PLA / PPA, some properties of the material, especially the flexibility, cannot meet the requirements of the parts. Aiming at these problems, this paper innovatively uses multifunctional polycarbodiimide as a reactive compatibilizer to further modify PLA / PPA blends. The addition of polycarbodiimide (PCDI) can improve the blend The high temperature stability and compatibility of the material, and the process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01F1/10D01D5/08D01D5/30D01D5/12D01D10/02
Inventor 杨桂生刘凯
Owner HEFEI GENIUS NEW MATERIALS
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