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Cellulose higher fatty acid ester and preparation method thereof

A fatty acid ester and cellulose technology, which is applied in the field of cellulose high fatty acid ester and its preparation, can solve the problems of incomplete solid phase reaction, complicated screening and washing, and long reaction time, so as to increase the reaction contact surface and shorten the reaction time. Reaction time, the effect of shortening the reaction time

Active Publication Date: 2013-12-11
福建鸿燕化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of low esterification degree, long reaction time, incomplete solid-phase reaction, cumbersome screening and washing in the later stage of existing cellulose high-grade fatty acid esters, and provide a cellulose high-grade fatty acid ester and its preparation method

Method used

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  • Cellulose higher fatty acid ester and preparation method thereof

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Embodiment 1

[0021] In this embodiment, the weight ratio of each component of the cellulose higher fatty acid ester, cellulose, esterification agent, and co-reactant is 100g:200g:500g. The cellulose is sugarcane cellulose; the esterification agent is octanoic acid (C8); and the co-reactant is acetic anhydride.

[0022] a. Pre-reaction: According to the weight ratio of cellulose, esterifying agent, and co-reactant as 100g:200g:500g, respectively weigh sugarcane cellulose, caprylic acid (C8) esterifying agent, and acetic anhydride co-reactant. After mixing with the co-reactant, pre-react at 65° C. for 15 minutes, and then mix the cellulose with the pre-reacted reactant evenly to obtain a mixed material.

[0023] b. Esterification reaction: Add the mixed material obtained in step a into a ball mill, and carry out esterification reaction for 60 minutes at a stirring speed of 250rmp and a temperature of 65°C to obtain a reaction product, which is washed and dried The cellulose higher fatty aci...

Embodiment 2

[0026] In this embodiment, the weight ratio of the components of the cellulose higher fatty acid ester, cellulose, esterifying agent, and co-reactant, is 100g:100g:400g. The cellulose is tapioca cellulose; the esterification agent is lauric acid (C12); and the co-reactant is p-toluenesulfonyl chloride.

[0027] a, pre-reaction: according to the weight ratio of cellulose, esterifying agent, co-reactant is 100g:100g:400g, take cassava cellulose, lauric acid (C12) esterifying agent, p-toluenesulfonyl chloride co-reactant respectively, and The esterification agent and the co-reactant are mixed and pre-reacted at 50° C. for 18 minutes, and then the cellulose and the pre-reacted reactant are uniformly mixed to obtain a mixed material.

[0028] b. Esterification reaction: Add the mixed material obtained in step a into a ball mill, and carry out esterification reaction for 40 minutes under the conditions of a stirring speed of 300rmp and a temperature of 55°C to obtain a reaction produc...

Embodiment 3

[0031] In this embodiment, the weight ratio of each component of the cellulose higher fatty acid ester, cellulose, esterification agent, and co-reactant is 100g:150g:300g. The cellulose is a mixture of sugarcane cellulose and tapioca cellulose; the esterification agent is a mixture of lauric acid (C12) and octanoic acid (C8); and the co-reactant is trichloroacetic anhydride.

[0032] a. Pre-reaction: According to the weight ratio of cellulose, esterification agent and co-reactant as 100g:150g:300g, weigh sugarcane cellulose and tapioca cellulose (the ratio of both is 50g:50g), lauric acid (C12) and octanoic acid (C8) esterification agent (the ratio of the two is 75g:75g), trichloroacetic acid anhydride co-reactant, the esterification agent and co-reactant are mixed and pre-reacted at 70°C for 107min, and then the cellulose Mix evenly with the pre-reacted reactant to obtain a mixed material.

[0033] b. Esterification reaction: Add the mixed material obtained in step a into th...

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Abstract

The invention belongs to the field of cellulose modification, and more specifically relates to a cellulose higher fatty acid ester and a preparation method thereof. The weight ratio of cellulose, an esterifying agent and a coreactant, which are the principle raw materials of the cellulose higher fatty acid ester, is 100g:50g-300g:100g-600g. The preparation method comprises steps of pre-reaction and esterification reaction, wherein the esterifying agent and the coreactant are mixed uniformly firstly; the mixture is subjected to pre-reaction for 10 to 30min at a temperature of 50 to 90 DEG C; cellulose is mixed with the mixture uniformly after the pre-reaction, and the mixture is delivered into a ball grinder and is subjected to esterification reaction for 20 to 90min at the temperature of 40 to 90 DEGC with a stirring speed of 100 to 500rmp; and then obtained reaction product is washed and dried so as to obtain the cellulose higher fatty acid ester. Mechanical activation technology is employed so as to increase esterification efficiency of cellulose, shorten reaction time and simplify the processing steps.

Description

technical field [0001] The invention belongs to the field of cellulose modification, in particular to a cellulose high fatty acid ester and a preparation method thereof. Background technique [0002] Cellulose is the most abundant and renewable natural resource in nature. It is cheap, degradable, and does not pollute the environment. Therefore, all countries in the world attach great importance to the research and development of cellulose as a bio-based material. However, the hydroxyl groups of cellulose form hydrogen bonds in the molecule or between molecules, have high crystallinity, decompose at high temperatures without melting, have no thermoplasticity, lack the characteristics of softening and melting like "plastics" when heated, and cannot be like metals and plastics It also has the disadvantage of being processed by heating and pressure, and it is incompatible with synthetic polymers, so it is difficult to become a bio-based material, and it must be thermoplastic...

Claims

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Application Information

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IPC IPC(8): C08B3/16C08B3/10
Inventor 黄祖强张燕娟胡华宇刘小萍陈燕萌甘涛覃杏珍黄爱民冯振飞杨梅覃宇奔
Owner 福建鸿燕化工有限公司
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