Spinning stoste of cellulose derivative and its preparation and use

A technology of cellulose derivatives and spinning dope, which is applied to the spinning dope of cellulose ethers and esters and its preparation and application. The spinning dope of cellulose derivatives and its preparation and application can solve the problem of fiber spinning Unfavorable effects on molding and structural properties, inability to produce cellulose ether and ester ultrafine fibers, and uneven fiber diameters, etc., to achieve the effects of low price, strong adsorption, and uniform diameters

Inactive Publication Date: 2007-05-09
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electrospinning has the disadvantages that the spinneret is easy to block, and the obtained ultrafine fibers often have "pearl joints". Moreover, the diameter of the fibers obtained from the same spinning stock solution is uneven in diameter, which has the disadvantages of spinning shape and structural properties of the fibers. adversely affect
Therefore, using the existing electrospinning method, various smooth and uniform cellulose ether and ester ultrafine fibers such as cellulose acetate butyrate and cellulose acetate propionate cannot be obtained.

Method used

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  • Spinning stoste of cellulose derivative and its preparation and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Using cellulose acetate butyrate (CAB) as raw material, first prepare the CAB spinning stock solution, the solvent is a mixed solvent of acetic acid and acetone, acetic acid: acetone = 1: 2 (volume ratio), and the cationic surfactant is hexadecane Trimethylammonium bromide (CTAB), wherein, the CAB powder content is 50wt%, and the addition amount of CTAB surfactant is 1wt%, is stirred evenly under the temperature condition of 25 ℃, obtains uniform CAB after static defoaming spinning dope.

[0016] Referring to accompanying drawing 1, inject the prepared CAB spinning dope into the dope container 2, the spinning temperature is about 25°C, the output voltage of the high voltage power supply 1 is 10KV, and the distance between the receiving screen 5 and the spinneret 3 is 20cm , The receiving screen is aluminum foil. Take off the CAB superfine fibers collected on the receiving screen, the diameter is 500±50nm, smooth and uniform in thickness.

Embodiment 2

[0018] Using cellulose acetate propionate (CAP) as raw material, first prepare the CAP spinning stock solution, the solvent is acetone, and the nonionic surfactant is polyethylene glycol (PEG), wherein the CAB powder content is 40wt%, PEG polymerized The temperature is 20,000, the addition amount is 2wt%, the mixture is stirred evenly under the temperature condition of 50° C., and a uniform CAP spinning stock solution is obtained after standing for defoaming.

[0019] Referring to accompanying drawing 1, inject the prepared CAP spinning dope into the dope container 2, the spinning temperature is about 80°C, the output voltage of the high voltage power supply 1 is 25KV, and the distance between the receiving screen 5 and the spinneret 3 is 30cm , The receiving screen is copper mesh. Take off the CAP superfine fiber collected on the receiving screen, its diameter is 600±50nm, and it is smooth and uniform in thickness.

Embodiment 3

[0021] Using hydroxyethyl cellulose (HEC) as raw material, first prepare the HEC spinning stock solution, the solvent is water, the anionic surfactant is sodium dodecylsulfonate, wherein the HEC powder content is 30wt%, and the surfactant is added The amount is 2.5wt%, and it is evenly stirred on a magnetic stirrer at 30° C., and a uniform HEC spinning stock solution is obtained after standing for defoaming.

[0022] Referring to accompanying drawing 1, inject the obtained HEC spinning dope into the dope container 2, the spinning temperature is about 20°C, the output voltage of the high-voltage power supply 1 is 30KV, and the distance between the receiving screen 5 and the spinneret 3 is 10cm , The receiving screen is copper mesh. Take off the HEC superfine fiber collected on the receiving screen, its diameter is 300±50nm, and it is smooth and uniform in thickness.

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Abstract

The spinning stoste is prepared using CAB, CAP, HEC and HPC as raw material, acetic acid and formic acid as solvent, adding surfactant additive through the processes of fully stirring, standing by and de-foaming. The said stoste is used for electrostatic spinning to make super-thin fiber with diameter of 200-1000nm which has not only strong adsorb-ability, filtration-ability but also good biological compatibility and biological degradability and excellent ultraviolet-resisting and cold-resisting characteristics. Advantages: released nozzle blocked situation while conducting electrostatic spinning, reduced knob generation, uniform diameter of the super-thin fiber and increased production yield.

Description

technical field [0001] The invention relates to a spinning stock solution of cellulose derivatives and its preparation and application, in particular to a spinning stock solution of cellulose ethers and esters and its preparation and application, and belongs to the technical field of spinning stock solution preparation and application. Background technique [0002] Cellulose ethers and esters are natural polymer derivatives with good biocompatibility and biodegradability, as well as excellent properties such as UV resistance, cold resistance, flexibility, transparency and electrical insulation. Therefore, such raw materials Mainly used in coatings, leather brighteners and other industrial additives. At present, cellulose derivatives are used for spinning, especially for the preparation of ultrafine fibers by electrospinning. Except for the reports of using cellulose acetate, sodium carboxymethylcellulose and cyanocellulose as raw materials, other C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/10
Inventor 朱新生庞娟
Owner SUZHOU UNIV
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