Hemp stalk composite cellulose ether and preparation method thereof

A hemp stalk and cellulose technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of ecological damage, difficult to decompose, etc., and achieve the effects of less sewage discharge, easy desizing, and rich raw material resources

Inactive Publication Date: 2013-05-22
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The environmental pollution problem of PVA is mainly that it is very stable to acid, alkali and general microorganisms, it is not easy to be decomposed, and long-term deposition will cause ecological damage

Method used

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  • Hemp stalk composite cellulose ether and preparation method thereof
  • Hemp stalk composite cellulose ether and preparation method thereof
  • Hemp stalk composite cellulose ether and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The preparation of embodiment 1 hemp stalk cellulose compound ether

[0040] 1. Grind the cleaned and dried hemp stalk to 200 mesh hemp stalk powder.

[0041] 2. Soak 175g of hemp stalk powder in 1000g of 8g / 100ml sodium hydroxide solution and stir for alkalization to generate alkali cellulose, and react at 20°C for 50 minutes.

[0042] 3. Add 280g of methyl chloride to the alkali cellulose. When the reactor temperature was raised to 42°C, 280g of ethylene oxide was added, and the temperature was gradually raised to 48°C within 2.5 hours. Then, it was kept at 55°C for 1.5 hours to complete the etherification. After the reaction was finished, the reactor was cooled to 20°C and exhausted. The crude product was mixed with 65g of 50wt% citric acid to adjust the pH to 5.0, and then 13g of 40wt% liquid glyoxal was added. After thorough mixing, heat to 70° C. for 20 minutes to obtain surface-crosslinked nonionic hemp stalk cellulose complex ether. Cool the crude product t...

Embodiment 2

[0047] The preparation of embodiment 2 hemp stalk cellulose compound ethers

[0048] 1. Grind the washed and dried hemp stalk to 400 mesh hemp stalk powder.

[0049] 2. Soak 175g of hemp stalk powder in 1000g of 8g / 100ml sodium hydroxide solution and stir for alkalization to generate alkali cellulose, and react at 20°C for 50 minutes.

[0050] 3. Add 280g of methyl chloride to the alkali cellulose. When the reactor was heated to 42°C, 280g of propylene oxide was added, and the temperature was gradually raised to 48°C within 2.5 hours. Then, it was kept at 55°C for 1.5 hours to complete the etherification. After the reaction, the reactor was cooled to 25° C. and exhausted. The crude product was mixed with 65g of 50wt% citric acid to adjust the pH to 5.0, and then 13g of 40wt% glyoxal was added. After being fully mixed, heat to 70°C for 20 minutes, cool the crude product to 25°C, wash twice with water, filter, and dry at 80°C to obtain a surface-crosslinked non-ionic hemp st...

Embodiment 3

[0056] Embodiment 3 sizing effect evaluation

[0057] Taking 40s×40s, 110×76 plain cotton cloth as an example, the yarn sizing process is as described in "Weaving Science" (Edited by Zhu Sukang, China Textile Press, Beijing, 121-122). In the sizing process parameters, use GA310 sizing machine, adopt 1 part of compounded hemp stalk cellulose compound ether to replace 2 parts of PVA sizing, the composition of the hemp stalk cellulose compound ether is 40wt% of 2# size and 60wt% % of 1# slurry. The comparison data of sizing process parameters are shown in Table 3, and the comparison results of sizing process effects are shown in Table 4:

[0058] Table 3 Comparison of sizing process parameters

[0059]

[0060] Table 4 Comparison of sizing process effects

[0061]

[0062]

[0063] After hemp stalk cellulose composite ether sizing, during the weaving process, the warp yarn breakage rate is 9.7 / 100,000 wefts, the weft yarn breakage rate is 9.5 / 100,000 wefts, and the lo...

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Abstract

The invention discloses a preparation method of hemp stalk composite cellulose ether. The method comprises the following steps of: preparing hemp stalks into nonionic composite cellulose ether and ionic composite cellulose ether; and compounding the two types of hemp stalk cellulose ether, wherein the viscosity measured at the temperature 25 DEG C and under the concentration 2 percent by weight is 2-500 mPa.s. The hemp stalk composite cellulose ether has short process flow, adjustable viscosity as well as high viscosity and high viscosity stability under the high temperature condition, is particularly suitable to be applied to the fields of slurry and oil exploration, and has the advantages of short process flow, stable viscosity, convenience for operating, good product quality and wide application range.

Description

technical field [0001] The invention relates to a cellulose compound ether and a preparation method thereof, belonging to the field of chemical industry, in particular to a hemp stalk cellulose compound ether and a preparation method thereof. Background technique [0002] Since the 1990s, due to the increasingly serious problem of global environmental pollution, the future availability of human resources has been continuously shrinking, and life and health have gradually become topics that people pay more and more attention to and eternally pay attention to. The so-called "green resources" that have no environmental pollution, are hygienic and antibacterial, and can be recycled. Human beings advocate nature and return to nature. Under this situation, the research on green and environment-friendly textiles has attracted more and more attention from the world. [0003] The textile industry is a pillar industry for my country's export and foreign exchange earning, and it is al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B11/08C08B11/12C08B1/08C08L1/28D06M15/09C09K8/00
Inventor 季英超尹春英王迎
Owner DALIAN POLYTECHNIC UNIVERSITY
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