Simple synthesis process of cellulose sulfate

A sulfate and fiber technology, which is applied in the field of simple and general synthesis of cellulose sulfate, can solve problems such as unsatisfactory esterification effect, easy carbonization, and difficulty in improving the degree of esterification.

Active Publication Date: 2013-10-23
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pass SO directly into the fiber 3 The gas method has problems such as unsatisfactory esterification effect, the reaction is only carried out on the surface of the fiber, easy carbonization, and difficult to increase the degree of esterification.

Method used

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  • Simple synthesis process of cellulose sulfate
  • Simple synthesis process of cellulose sulfate
  • Simple synthesis process of cellulose sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Solid or gaseous SO 3 , add or pass into cooled 1,2-dichloroethane to form 4mol / L SO 3 / 1,2-dichloroethane solution. Then microcrystalline fiber (MCC) is added in the reactor by the consumption in the table, to SO 3 The effects of solution concentration, dosage, reaction time and reaction temperature on the fiber conversion rate were explored. For the results of related experiments and comparative experiments, see Table 2, Table 3, Table 4, and Table 5.

[0037] Table 2: Different SOs 3 Study on the Influence of Concentration on the Conversion Rate of Microcrystalline Fiber

[0038]

[0039] Note: * Fiber conversion rate is the conversion rate of soluble fiber sulfate (the same below)

[0040] no AGU : n SO3 is the number of moles of glucose units of cellulose and SO 3 Ratio of moles (the same below)

[0041] Table 3 Different SOs 3 Research on the effect of dosage on the conversion rate of microcrystalline fiber

[0042]

[0043] Table 4 Exploration of ...

Embodiment 2

[0049] Solid or gaseous SO 3 , add or pass into cooled dichloromethane to form 3mol / L SO 3 / dichloroethane solution. Using microcrystalline fiber (MCC) as a raw material, the reaction was carried out according to the experimental conditions in Table 6, and the results of related experiments and comparative experiments are shown in Table 6.

[0050] Table VI SO 3 / CH 2 CI 2 systematic exploration

[0051]

Embodiment 3

[0053] Solid or gaseous SO 3 , add or pass into cooled 1,2-dichloroethane to make 3mol / L SO 3 / dichloroethane solution. Then use natural color paste, short cotton linters, and straw powder as fiber raw materials, and react according to the experimental conditions in Table 7. See Table 7 for the results of related experiments and comparative experiments.

[0054] Table 7 Exploration of the sulfation effect of different fibers

[0055]

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Abstract

The invention provides a novel clean production process for synthesizing cellulose sulfate at high conversion rate and high quality in an aprotic solvent in the absence of an acid-binding agent based on SO3 and fiber as raw materials. The novel clean production process is simple in process, mild in condition, recyclable in reaction materials, high in conversion rate, good in product quality and free of toxic and side ion and solvent residual; the cellulose sulfate product is wide to apply and has a huge industrial application prospect.

Description

technical field [0001] The invention relates to a simple and general synthesis process of cellulose sulfate, which belongs to the technical field of cellulose modification and application. Background technique [0002] Cellulose is the most widely distributed renewable resource with the largest reserves and production. The cellulose synthesized by photosynthesis in nature reaches 1.5*10 every year. 12 tons, but only 2.5% are utilized. Cellulose has the characteristics of biodegradability, biocompatibility, and derivatization. Cellulose functionalized products have a wide range of applications in the fields of energy, materials, chemical industry, and agriculture. The high crystallinity of cellulose macromolecules makes it insoluble and infusible, which affects its processing performance, mechanical properties and performance, and restricts its development and utilization as a basic raw material. Therefore, through the derivatization of cellulose, improving its water-solubi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B5/14
Inventor 樊媛婷尹应武赵玉芬陈榕冰
Owner XIAMEN UNIV
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