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Preparation method and application of xylenol orange functionalized polyvinyl alcohol fiber

A polyvinyl alcohol fiber, orange function technology, applied in fiber processing, fiber type, analysis by chemical reaction of materials, etc., can solve the problems of polluting the environment, high cost, and non-recyclable small molecule indicators, reaching The effect of high alkali sensitivity, low cost, and excellent cycle performance

Active Publication Date: 2022-06-28
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of non-recyclable, polluted environment and high cost of existing small molecule indicators, the present invention proposes a xylenol orange functionalized polyvinyl alcohol fiber and its preparation method, and uses it as a recyclable acid-base indicator , the carrier is cheap and easy to obtain, the preparation process is simple, the acid-base discoloration is sensitive, the cost is low, and the cycle performance is good

Method used

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  • Preparation method and application of xylenol orange functionalized polyvinyl alcohol fiber
  • Preparation method and application of xylenol orange functionalized polyvinyl alcohol fiber
  • Preparation method and application of xylenol orange functionalized polyvinyl alcohol fiber

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Embodiment 1

[0034] The preparation method of the xylenol orange functionalized polyvinyl alcohol fiber PVAF-XO of the present embodiment is as follows:

[0035] (1) Pretreatment of commercial polyvinyl alcohol fibers: put 5.0 g of commercial polyvinyl alcohol fibers into a 500 mL round-bottomed flask containing 300 mL of distilled water, reflux under magnetic stirring for 5 h, filter, and use 200 mL of distilled water at 65 °C. rinse. After washing, the fibers were dried in a drying oven at 60 °C for 12 h.

[0036] (2) Add 0.5 g of pretreated polyvinyl alcohol fibers to a 100 mL round-bottomed flask, then add 1.0 g of xylenol orange tetrasodium salt, 1 mL of concentrated phosphoric acid and 30 mL of distilled water, and reflux under magnetic stirring for 5 h. Filtration, the filtrate was collected and used for the preparation of the next batch of fibers; after the reaction, the fibers were washed with distilled water at 65 °C until the filtrate did not develop color under UV light, and f...

Embodiment 2

[0038] The preparation method of the xylenol orange functionalized polyvinyl alcohol fiber PVAF-XO of the present embodiment is as follows:

[0039] (1) Pretreatment of commercial polyvinyl alcohol fibers: put 5.0 g of commercial polyvinyl alcohol fibers into a 500 mL round-bottomed flask containing 300 mL of distilled water, reflux under magnetic stirring for 2 h, filter, and use 200 mL of distilled water at 55 °C rinse. After washing, the fibers were dried in a drying oven at 100 °C for 8 h before use.

[0040] (2) Add 0.5 g of pretreated polyvinyl alcohol fibers to a 100 mL round-bottomed flask, then add 0.5 g of xylenol orange tetrasodium salt, 0.5 mL of concentrated phosphoric acid and 30 mL of distilled water, and reflux for 4 h under magnetic stirring. Filtration, the filtrate was collected and used for the preparation of the next batch of fibers; after the reaction, the fibers were washed with distilled water at 55 °C until the filtrate did not develop color under UV ...

Embodiment 3

[0042] The preparation method of the xylenol orange functionalized polyvinyl alcohol fiber PVAF-XO of the present embodiment is as follows:

[0043](1) Pretreatment of commercial polyvinyl alcohol fibers: put 5.0 g of commercial polyvinyl alcohol fibers into a 500 mL round-bottomed flask containing 300 mL of distilled water, reflux under magnetic stirring for 10 h, filter, and use 200 mL of distilled water at 75 °C rinse. After washing, the fibers were dried in a drying oven at 80 °C for 10 h.

[0044] (2) Add 0.5 g of pretreated polyvinyl alcohol fibers to a 100 mL round-bottomed flask, then add 1.5 g of xylenol orange tetrasodium salt, 1.5 mL of concentrated phosphoric acid and 30 mL of distilled water, and reflux under magnetic stirring for 10 h. Filtration, the filtrate was collected and used for the preparation of the next batch of fibers; after the reaction, the fibers were washed with distilled water at 75 °C until the filtrate did not develop color under UV light, and...

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Abstract

The invention relates to xylenol orange functionalized polyvinyl alcohol fiber as well as a preparation method and application thereof, and belongs to the technical field of acid-base indication. The invention aims to solve the problems that a micromolecular acid-base indicator cannot be separated from a solution, and a system with high requirements can cause certain pollution to the solution after measurement. In addition, some acid-base indicators are expensive, the preparation process is complex, and the application cost of the micromolecular acid-base indicators is increased due to the defect that the acid-base indicators are difficult to recover, and the method mainly comprises the following two steps: 1, polyvinyl alcohol fiber pretreatment; and 2, synthesizing the xylenol orange functionalized polyvinyl alcohol fiber, namely the polyvinyl alcohol fiber immobilized xylenol orange indicator. The advantages of the xylenol orange and the polyvinyl alcohol fiber are combined, and the xylenol orange is immobilized on the polyvinyl alcohol fiber and is used for determining the acid-base property of a solution. The solid acid-base indicator is simple in preparation method, sensitive in acid-base discoloration, excellent in recycling performance and high in industrial application value.

Description

technical field [0001] The invention belongs to the technical field of acid-base discoloration indication, in particular to a xylenol orange functionalized polyvinyl alcohol fiber and a preparation method and application thereof. Background technique [0002] Color-changing fiber material refers to a fiber with a special structure that can change its color when it encounters external environmental stimuli such as changes in pH, light, temperature or pressure. Color-changing fiber is a kind of intelligent fiber, which has potential practical application value in special clothing, packaging, protection, monitoring, sensors, military masking and other fields. Color-changing fibers mainly include photochromic fibers, thermochromic fibers, acid-base color-changing fibers, and the like. In the past 20 years, based on extensive research on color-changing dyes, a large number of color-changing materials with novel structures and different functions have been reported. [0003] Aci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/438G01N21/80D06M101/24
CPCD06M13/438G01N21/80G01N2021/775D06M2101/24Y02W30/62
Inventor 李鹏宇艾文英杨宇张俊涛鲁佳丽付强厉明杨赵廷月
Owner ZHONGYUAN ENGINEERING COLLEGE
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