Method for rapidly detecting cellulose-ether anti-mold performance

A technology of cellulose ether and cellulase, applied in flow characteristics, measuring devices, instruments, etc., can solve the problems of test result error, long cycle, unfavorable large-scale production, etc., achieve high detection accuracy, ensure production efficiency and annual production The effect of short production and detection cycle

Inactive Publication Date: 2017-01-18
浙江海申新材料有限公司
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  • Description
  • Claims
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Problems solved by technology

However, the test method for the anti-mold performance of this type of cellulose ether has a long cycle, which affects the production efficiency and annual production volume, and the test results have large errors, which is not conducive to large-scale production.

Method used

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  • Method for rapidly detecting cellulose-ether anti-mold performance
  • Method for rapidly detecting cellulose-ether anti-mold performance
  • Method for rapidly detecting cellulose-ether anti-mold performance

Examples

Experimental program
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Embodiment 1

[0027] The method for rapid detection of mildew resistance of cellulose ether products in this embodiment 1 comprises the following steps:

[0028] (1) Preparation of cellulase solution:

[0029] Put 1.00 g of cellulase powder in 100 mL of distilled water, stir at a low speed for 3 minutes to fully suspend the cellulase, stop stirring and let it stand for at least 20 minutes, and wait until the supernatant is completely clarified before use. If the supernatant is still turbid, it can be separated with a centrifuge.

[0030] (2) Preparation of cellulose ether solution:

[0031] After the cellulose ether sample to be tested is dried, prepare 200mL of a 1-2% concentration solution with distilled water, keep the temperature in a constant temperature bath at 20ºC for 2 hours, and measure the initial viscosity V with a Brookfield RV viscometer at 20RPM after the cellulose ether is completely dissolved. 0 . If the initial viscosity is higher than 5000cps, prepare a 0.5% cellulose ...

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Abstract

The invention relates to a method for rapidly detecting the cellulose-ether anti-mold performance. The method includes the following steps that (1) cellulose powder is put into distilled water, the mixture is stirred, the cellulose is fully suspended, and standing is carried out till supernatant is completely clarified; (2) a to-be-detected cellulose-ether sample is dried, then a solution is prepared with distilled water, the constant temperature is kept in a constant temperature groove, and the initial viscosity is detected through a viscosity meter; (3) a cellulose solution is movably taken into a to-be-detected cellulose-ether solution, timing and stirring are carried out, an enzyme solution is evenly dispersed, large bubbles do not exist in the solution, the viscosity is detected, time is recorded, the viscosity is detected once every 30 s to 60 s, operating is repeated till the viscosity is reduced to be below 200 cps to 300 cps, or operating is stopped after 10 min to 15 min. According to the method, detection is carried out in the mode that cellulose ether is cut through cellulose, the anti-enzyme capacity of the cellulose ether can be rapidly detected, the detection period is quite short, the detection accuracy is high, the production efficiency and the annual yield are guaranteed, and the basis is provided for large-scale production.

Description

technical field [0001] The invention relates to a method for detecting the anti-mold performance of cellulose ether, in particular to a method for rapidly detecting the anti-mold performance of cellulose ether. Background technique [0002] As a thickener, cellulose ether is widely used in building materials, oil exploration, water-based paints, daily chemicals, personal care, food and medicine. As a natural polymer, cellulose ether is easily degraded by microorganisms and loses viscosity. Especially in the paint industry, the viscosity stability of cellulose ether is the most important indicator. In the prior art, manufacturers of water-based coatings mix different brands of cellulose ethers into glue or coatings and place them for several months to observe the change in viscosity to determine the stability of cellulose ethers, that is, the enzyme resistance. However, the test method for the mildew resistance of this type of cellulose ether has a long cycle, which affects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/00
CPCG01N11/00
Inventor 高水龙
Owner 浙江海申新材料有限公司
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