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Preparation method of oleophobic hydrophobic/hydrophilic functional self-conversion cellulose coating material

A coating material and cellulose technology, which is applied in the field of preparation of oleophobic/hydrophobic/hydrophilic functional self-converting cellulose coating materials, can solve the problems of low product yield and environmental pollution

Active Publication Date: 2015-07-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the relevant research is to use the heterogeneous method of petrochemical organic polymers as the carrier to chemically link two different hydrophobic and hydrophilic groups. However, the product yield obtained by this preparation method is low, and it will cause serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing an oleophobic / hydrophobic / hydrophilic functional self-converting cellulose coating material, comprising the following steps:

[0019] (1) In terms of weight fraction, add 1 part of cellulose raw material to 20 parts of 1-butyl-3 alkane imidazolium chloride salt ionic liquid at 100 ° C for complete dissolution, add 8 parts of trityl chloride and 9 parts of pyrimidine catalyst, Under the condition of Ar atmosphere, the temperature was raised to 80°C and kept for 8h for C 6 The upper trityl substitution reaction, cooled to room temperature, inject the reaction mixture into the methanol solution, and repeatedly wash and filter with methanol, and vacuum dry to obtain the reaction product 1; this step mainly utilizes the C on the cellulose molecular chain 2 ,C 3 and C 6 Differences in ‐OH reactivity.

[0020] (2) Sodium chloroacetate (ClCH) with 5% cellulose quality 2 COONa) was added to the DMSO solution of the reaction product one, stirred and rea...

Embodiment 2

[0027] A method for preparing an oleophobic / hydrophobic / hydrophilic functional self-converting cellulose coating material, comprising the following steps:

[0028] (1) In parts by weight, 1 part of cellulose raw material is added to 20 parts of 1-allyl-3 alkane imidazolium chloride salt ionic liquid at 100 ° C for complete dissolution, and then 8 parts of trityl chloride and 9 parts The pyrimidine catalyst was added to the above reaction mixture, the temperature was raised to 85°C and kept for 8h for C 6 The upper trityl substitution reaction (under Ar atmosphere conditions), followed by cooling to room temperature; the reaction mixture was injected into methanol solution, and repeatedly washed and filtered with methanol, and finally vacuum-dried to obtain the desired reaction product-

[0029] (2) The relative concentration is 7% sodium chloroacetate (ClCH 2 COONa) was added into the reaction product one / DMSO solution, stirred and reacted at 80° C. for 54 h, after the reaction...

Embodiment 3

[0035] A method for preparing an oleophobic / hydrophobic / hydrophilic functional self-converting cellulose coating material, comprising the following steps:

[0036] (1) Utilize the C on the cellulose molecular chain 2 ,C 3 and C 6 Difference in ‐OH reactivity: Add 1 part of cellulose raw material to 20 parts of room temperature biphosphite alkyl imidazole compound ionic liquid at 60 °C for complete dissolution, then add 9 parts of trityl chloride and 9 parts of pyrimidine catalyst to In the above reaction mixture, the temperature was raised to 90°C and kept for 8h for C 6 The upper trityl substitution reaction (under Ar atmosphere conditions), followed by cooling to room temperature; the reaction mixture was poured into methanol solution, and washed with methanol repeatedly and filtered, and finally vacuum-dried to obtain the desired reaction product one.

[0037] (2) The relative concentration is 8% sodium chloroacetate (ClCH 2 COONa) was added to the reaction product one / ...

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Abstract

The invention discloses a preparation method of an oleophobic hydrophobic / hydrophilic functional self-conversion cellulose coating material. The preparation method comprises the following steps of: adding 1-3 parts by weight of cellulose into 20-25 parts by weight of ionic liquid, dissolving, adding triphenylmethyl chloride and a pyrimidine catalyst, and reacting to obtain a reaction product I; adding methyl sodium chloroacetate into the reaction product I, and reacting to obtain a reaction product II; dispersing the reaction product II in an ethanol solution, dropping concentrated hydrochloric acid, and reacting to obtain a reaction product III; stirring 1, 1-2H-perfluoro alcohol and 4, 4-diphenylmethane diisocyanate to obtain a reaction product IV; adding the reaction product IV into the reaction product III to obtain a reaction product V; and grinding, placing into an acetone / water solution to prepare an emulsified solution, and coating on a PVC (polyvinyl chloride) thin film to obtain the oleophobic hydrophobic functional self-conversion cellulose coating material. According to the preparation method disclosed by the invention, a cellulose molecular chain stereoselective functional assembly method in the ionic liquid is introduced into the preparation of the amphipathic functional material, and the functional self-conversion of a coating can be further realized.

Description

technical field [0001] The invention relates to a functional cellulose coating material, in particular to a preparation method of an oleophobic / hydrophobic / hydrophilic functional self-converting cellulose coating material. Background technique [0002] With the rapid development of the world economy, the depletion of non-renewable resources such as petroleum, coal mines, and natural gas, and the increasingly serious environmental pollution, the development and utilization of agricultural and forestry biomass resources based on cellulose is gradually becoming a research hotspot for scientists worldwide. , has been widely used in many fields such as food, pulp and paper, and functional composite materials. Many developed countries have considered the development and utilization of agricultural and forestry biomass resources as a major national strategic development consideration. In my country, it is also clear that the comprehensive development of agricultural and forestry biom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B15/06C09D101/08
Inventor 刘德桃杨仁党陈克复夏锟峰阮蒙杨飞
Owner SOUTH CHINA UNIV OF TECH
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