Intelligent soft material nanofiber membrane of quadrupolar hydrogen bonding cross-linked levorotation and dextrorotation polylactic acid and preparation method thereof

A technology of D-polylactic acid and nanofiber membranes, which is applied in fiber processing, spinning solution preparation, nonwoven fabrics, etc., can solve the problems of stretchability, tear resistance and self-healing immaturity, so as to ensure the biophase Capacitance, reducing difficulty, improving heat resistance and mechanical properties

Active Publication Date: 2018-10-19
广州市玛莉安化妆用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above existing technologies, it can be known that by attaching a self-healing smart layer to the surface of fibers or fabrics, textiles can be endowed with self-healing properties. However, the research on self-healing materials in terms of stretchability, tear resistance and self-healing of textiles is not yet mature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) According to the mass ratio of L-lactide, stannous octoate and tetraethylene glycol is 70:0.1:1.5, add L-lactide, stannous octoate and tetraethylene glycol into the reaction flask, under a vacuum of 0.001Pa Under ambient conditions, first heat at 100°C for 2 hours, then raise the temperature to 150°C for 18 hours, dissolve in chloroform, and recrystallize with ethanol to obtain a soft material of L-lactic acid.

[0026] (2) According to the mass ratio of polytetramethylene glycol, dextrolactide and stannous octoate is 2:65:0.1, after polytetramethylene glycol is added to dextrolactide and mixed evenly, Add stannous octoate catalyst, in a vacuum environment of 0.001Pa, first heat at 110°C for 3 hours, then raise the temperature to 140°C for 18 hours, dissolve in chloroform, and recrystallize with ethanol to obtain a soft material of D-polylactic acid.

[0027] (3) By weight, after adding 0.2 parts of L-polylactic acid soft material and 0.9 part of D-polylactic acid s...

Embodiment 2

[0030] (1) According to the mass ratio of L-lactide, stannous octoate and tetraethylene glycol is 75:0.2:1.7, L-lactide, stannous octoate and tetraethylene glycol are added to the reaction flask, under a vacuum of 0.005Pa Under ambient conditions, first heat at 120°C for 4 hours, then raise the temperature to 160°C for 20 hours, dissolve in chloroform, and recrystallize with ethanol to obtain a soft material of L-lactic acid.

[0031] (2) According to the mass ratio of polytetramethylene glycol, dextrolactide and stannous octoate is 3:70:0.2, after polytetramethylene glycol is added to dextrolactide and mixed evenly, Add stannous octoate catalyst, in a vacuum environment of 0.005Pa, first heat at 120°C for 6h, then raise the temperature to 150°C for 20h, dissolve in chloroform, and recrystallize with ethanol to obtain a soft material of D-polylactic acid.

[0032] (3) In parts by weight, after adding 0.5 parts of L-polylactic acid soft material and 0.95 part of D-polylactic acid...

Embodiment 3

[0035] (1) According to the mass ratio of L-lactide, stannous octoate and tetraethylene glycol is 72:0.12:1.6, L-lactide, stannous octoate and tetraethylene glycol are added in the reaction flask, under the vacuum of 0.003Pa Under ambient conditions, first heat at 105°C for 3 hours, then raise the temperature to 155°C for 19 hours, dissolve in chloroform, and recrystallize with ethanol to obtain a soft material of L-lactic acid.

[0036] (2) According to the mass ratio of polytetramethylene glycol, dextrolactide and stannous octoate is 2.5:68:0.13, after polytetramethylene glycol is added to dextrolactide and mixed evenly, Add stannous octoate catalyst, in a vacuum environment of 0.002Pa, first heat at 115°C for 4h, then raise the temperature to 145°C for 19h, dissolve in chloroform, and recrystallize with ethanol to obtain a soft material of D-polylactic acid.

[0037] (3) By weight, after adding 0.4 parts of L-polylactic acid soft material and 0.92 part of D-polylactic acid ...

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PUM

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Abstract

The invention provides an intelligent soft material nanofiber membrane of quadrupolar hydrogen bonding cross-linked levorotation and dextrorotation polylactic acid and a preparation method thereof. The preparation method comprises the steps that levorotation lactide, stannous octoate and tetraglycol are added into a reaction bulb, heated to react in a vacuum environment to obtain a levorotation lactic acid soft material; after polytetramethylene glycol is mixed with dextrorotation lactide, stannous octoate is added, and the mixture is heated to react in a vacuum environment to obtain a dextrorotation lactic acid soft material; after the levorotation lactic acid soft material and the dextrorotation lactic acid soft material are added into trichlormethane to be dissolved, a quadrupolar hydrogen bonding cross-linking agent is added, and thermal copolymerization is performed in a vacuum environment to obtain an intelligent soft material of quadrupolar hydrogen bonding cross-linked levorotation and dextrorotation polylactic acid; finally the intelligent soft material of the quadrupolar hydrogen bonding cross-linked levorotation and dextrorotation polylactic acid is dissolved in a tetrahydrofuran solvent containing trichlormethane to be uniformly stirred until completely dissolved to obtain a spinning solution, and the intelligent soft material nanofiber membrane of the quadrupolar hydrogen bonding cross-linked levorotation and dextrorotation polylactic acid is prepared through electrostatic spinning. The prepared intelligent soft material nanofiber membrane has the advantages ofextensibility, tear resistance, self-reparability and good biocompatibility.

Description

technical field [0001] The invention belongs to the technical field of textile materials, and in particular relates to a quadruple hydrogen bond cross-linked left-handed right-handed polylactic acid intelligent soft material nanofiber film and a preparation method thereof. Background technique [0002] Smart soft material is a new type of functional material that can sense external stimuli. It has the characteristics of being able to withstand large deformation, having good bio-affinity, compatibility, light weight and low cost. Self-healing smart soft materials can spontaneously repair the microcracks of polymer materials caused by mechanical, chemical, heat and light factors during use. The self-healing process can be completed without external stimulus or under external stimulus. Improve the safety, service life and low maintenance cost of smart soft materials. [0003] At present, self-healing composite polymers are divided into thermoplastic materials and thermosetting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/435D01D1/02D01D5/00
Inventor 徐亚维
Owner 广州市玛莉安化妆用品有限公司
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