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Preparation method of PCL heterogeneous induced shish-kebab fiber

A fiber and heterogeneous technology, which is applied in the field of preparation of PCL heterogeneously induced skimmer fibers, can solve rare problems and achieve the effects of stable performance, cost reduction and good environmental protection.

Active Publication Date: 2018-12-21
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the incompatibility between PCL and PLA, the method of growing PCL heterogeneous skewers on the surface of PLA fibers is relatively rare in the prior art

Method used

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  • Preparation method of PCL heterogeneous induced shish-kebab fiber
  • Preparation method of PCL heterogeneous induced shish-kebab fiber
  • Preparation method of PCL heterogeneous induced shish-kebab fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of PCL heterogeneous induced skewered fiber, comprising the following steps:

[0030] (1) Dissolve 1.39g of PLA with a molecular weight of 50,000 into 15.96g of hexafluoroisopropanol, mix well, make a spinning solution and perform electrospinning to obtain a PLA fiber membrane.

[0031] (2) Alkali treatment of PLA fibers: soak the PLA fiber membrane prepared in step (1) in 2wt% sodium hydroxide aqueous solution for 10 minutes, then add 4wt% acetic acid aqueous solution to adjust the pH value to Neutral, wash, dry.

[0032] (3) Add 2g of PCL with a molecular weight of 50,000 to 98g of acetic acid aqueous solution with a mass concentration of 50wt%, and mix well to obtain a PCL solution with a concentration of 2wt% for later use; at 20°C, place the PLA fiber after alkali treatment Soak in PCL solution for 30 minutes, take it out, wash it with 50wt% acetic acid aqueous solution for 3 times, and dry it in vacuum to get the product PCL heterogeneous ind...

Embodiment 2

[0035] A preparation method of PCL heterogeneous induced skewered fiber, comprising the following steps:

[0036] (1) Dissolve 1.39g of PLA with a molecular weight of 80,000 into 15.96g of dichloromethane / N-N-dimethylamide mixed solvent (volume ratio 7:3), mix well, make spinning solution and perform electrospinning, Obtain PLA fiber membrane.

[0037] (2) Alkali treatment of PLA fiber: soak the PLA fiber membrane prepared in step (1) in a 10wt% sodium bicarbonate aqueous solution for 10 minutes, then add 4wt% acetic acid aqueous solution to adjust the pH value to Neutral, wash, dry.

[0038] (3) Add 5g of PCL with a molecular weight of 80,000 to 45g of amyl acetate, mix well to obtain a PCL solution with a concentration of 10wt%, and set aside; at 20°C, soak the PLA fiber after alkali treatment in the PCL solution After 60 minutes, take it out and wash it with amyl acetate for 4 times, and dry it in vacuum to obtain the product PCL heterogeneous induced skew crystal fiber. ...

Embodiment 3

[0041] A preparation method of PCL heterogeneous induced skewered fiber, comprising the following steps:

[0042] (1) Dissolve 2.18g of PLA with a molecular weight of 60,000 into 15.96g of hexafluoroisopropanol, mix well, make a spinning solution and perform electrospinning to obtain a PLA fiber membrane.

[0043] (2) Alkali treatment of PLA fibers: soak the PLA fiber membrane prepared in step (1) in an aqueous sodium carbonate solution with a concentration of 2wt% for 20 minutes, and then add a solution of sodium dihydrogen phosphate with a concentration of 20wt% to adjust the pH value To neutral, wash with water, dry.

[0044] (3) Add 2g of PCL with a molecular weight of 60,000 to 180g of acetic acid / amyl acetate, mix well to obtain a PCL solution with a concentration of 1wt%, and set aside; at 20°C, place the alkali-treated PLA fibers in the PCL solution Immerse in the medium for 180min, take it out, wash it with acetic acid / amyl acetate for 5 times, and dry it in vacuum t...

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Abstract

The invention relates to a preparation method of PCL heterogenous induced shish-kebab fiber, and belongs to the field of bio-medical polymer materials. The preparation method comprises the following steps that (1) PLA fiber is prepared by adopting an electrostatic spinning method; (2) alkaline treatment is conducted on the PLA fiber; and (3) the PLA fiber subjected to alkaline treatment is placedin the PCL solution and dipped for 1-300 minutes, and then washed with a acetic acid aqueous solution for 3-6 times, the product is taken out to be dried, and the PCL heterogenous induced shish-kebabfiber is obtained. The preparation method is simple in technological process, low in cost and short in period, and the obtained shish-kebab structure is even.

Description

technical field [0001] The invention relates to a method for preparing PCL heterogeneously induced skewered fibers, belonging to the field of biomedical polymer materials. Background technique [0002] PCL (polycaprolactone) and PLA (polylactic acid) are biopolymers, they have good biocompatibility, biodegradability, good mechanical properties, etc., and meet the needs of environmental protection and sustainable development , has attracted more and more attention from material researchers, and has a very broad application prospect, mainly used in biomedicine, disposable products, automobiles and other fields. [0003] As a semi-crystalline polymer, PLA has a slow crystallization rate and can hardly crystallize during actual processing. However, PCL has high crystallinity and low melting point, and can be crystallized at low temperature. PCL can self-induced to form a homogeneous string crystal structure at room temperature. Combining the two can solve the problem of slow c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/188D06M11/38D06M11/76D06M11/60D06B3/02D01F6/62D06M101/32
CPCD01F6/625D06B3/02D06M11/38D06M11/60D06M11/76D06M13/188D06M2101/32
Inventor 王小峰常中华李倩王东方江永超李旭燕蒋晶侯建华
Owner ZHENGZHOU UNIV
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