Cellulose composite solvent system and application thereof

A composite solvent and cellulose technology, applied in the direction of artificial filaments in cellulose solution, can solve the problems that cannot meet the industrial requirements, LiOH is expensive, and the solid content of cellulose is low, so as to overcome the problem of easy gelation problems, reducing the difficulty of preparation and subsequent processing, and optimizing the effect of spinning performance

Inactive Publication Date: 2013-03-13
DONGHUA UNIV
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent 200310111567.8 discloses a lithium hydroxide and urea composition solvent for dissolving cellulose and its use, through the method of freezing and thawing or directly dissolving cellulose and preparing cellulose cellulose or film. Although this method is simple and easy, But it can only dissolve the cellulose in the cellulose solution. The solid content of cellulose is relatively low, which cannot meet the industrial requirements. At the same time, LiOH is expensive and the cost is high.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 35 grams of NaOH are added to 392.5 grams of deionized water, stirred at normal temperature, then add 45 grams of urea and 20 grams of thiourea, 2.5 grams of ZnO, 5 grams of polyacrylamide, high-speed stirring to obtain a transparent and uniform composite solvent; The cellulose pulp that has been dried for 24 hours is added to the composite solvent while stirring, and a uniform cellulose suspension is obtained after mixing evenly, and then added to the pre-cooled twin-screw, the twin-screw speed is 316rpm, and the temperature of each section It is: the first stage: -6°C, the second stage: -10°C, the third stage: -12°C, the fourth stage: -10°C, the head: -8°C; obtained after dissolving in a twin-screw extruder Uniform cellulose solution, the cellulose concentration is 8wt%, and the gel time is 15hr.

Embodiment 2

[0041] 40 grams of NaOH was added to 370 grams of deionized water, stirred at normal temperature, then added 25 grams of urea and 50 grams of thiourea, 5 grams of ZnO, 10 grams of polyacrylamide, stirred at a high speed to obtain a transparent and uniform composite solvent; Add 24 grams of cellulose pulp dried for 24 hours into this composite solvent while stirring, and mix well to obtain a uniform cellulose suspension, which is added to the pre-cooled twin-screw, the twin-screw speed is 345rpm, and the temperature of each section It is: the first stage: -6°C, the second stage: -10°C, the third stage: -11°C, the fourth stage: -9°C, the head: -6°C; obtained after dissolving in a twin-screw extruder Uniform cellulose solution, the cellulose concentration is 10wt%, and the gel time is 21hr.

Embodiment 3

[0043] Add 45 grams of NaOH to 375 grams of deionized water, stir at normal temperature, then add 30 grams of urea and 30 grams of thiourea, 5 grams of ZnO, 15 grams of polyacrylamide, stir at a high speed to obtain a transparent and uniform composite solvent; 24 hours of dried cellulose pulp is added to this composite solvent while stirring, and after mixing evenly to obtain a uniform cellulose suspension, it is added to the pre-cooled twin-screw, the twin-screw speed is 403rpm, each section temperature It is: the first stage: -6°C, the second stage: -8°C, the third stage: -10°C, the fourth stage: -8°C, the head: -6°C; obtained after dissolving in a twin-screw extruder Uniform cellulose solution, the cellulose concentration is 12wt%, and the gel time is 26.5hr.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a cellulose composite solvent system and application thereof. The composite solvent is composed of the following constituents in percentage by weight: 6%-12% of NaOH, 4%-15% of urea, 4%-15% of thiourea, 0.5%-3% of ZnO, 1%-3% of polyacrylamide and 52%-84% of H2O; and the composite solvent is used for preparing a cellulose spinning solution, and the preparation comprises the following steps of: baking the cellulose powder, pre-freezing, preparing cellulose solution, and processing in a twin-screw extruder, thus obtaining the cellulose spinning solution. The composite solvent system is convenient for preparing the cellulose spinning solution, can effectively dissolve the cellulose under the condition of low temperature and high shear, and is non-toxic and non-volatile, simple and easy to recycle, and low in environment pollution, so that the cellulose can be used widely as a renewable energy substance.

Description

technical field [0001] The invention belongs to the field of a cellulose solvent and its application, in particular to a cellulose composite solvent system and its application. Background technique [0002] According to the prediction of experts, the oil resources on the earth will be exhausted by the middle of the 21st century, and the shortage of oil resources is increasing. At the same time, the global environmental pollution caused by it has attracted more and more attention and attention. In the 21st century, science and technology have tended to renewable raw materials and environmentally friendly and sustainable methods and processes. Cellulose is a renewable resource that widely exists in nature. The development and application of this sustainable renewable resource has attracted more and more attention. There are 500 billion tons of plants produced by photosynthesis on the earth every year, of which the available plant resources are about 200 billion tons. At pres...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08J3/05C08L1/02D01F2/02
Inventor 余木火黎欢张玥李欣达李海峰
Owner DONGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap