Banana cellulose crystallite/polylactic acid aerogel and preparation method and use thereof

A technology of cellulose microcrystals and polylactic acid, which is applied in fiber raw material processing, textiles and papermaking, etc., can solve the problems of banana stems and leaves polluting the environment, and achieve good oil absorption performance

Active Publication Date: 2015-11-04
GUANGXI TEACHERS EDUCATION UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Another object of the present invention is to provide a preparation method of banana cellulose microcrystal / polylactic acid airgel, the present invention utilizes polylactic acid as a reinforcing phase, prepares banana cellulose microcrystal / polylactic acid airgel composite material, solves the problem of The current problem of banana stems and leaves polluting the environment

Method used

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  • Banana cellulose crystallite/polylactic acid aerogel and preparation method and use thereof
  • Banana cellulose crystallite/polylactic acid aerogel and preparation method and use thereof
  • Banana cellulose crystallite/polylactic acid aerogel and preparation method and use thereof

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preparation example Construction

[0052] Figure 1~ Figure 7 Shown, the present invention provides a kind of preparation method of banana cellulose microcrystal / polylactic acid airgel, comprises the steps:

[0053] Step 1. Preparation of banana cellulose microcrystalline hydrogel: take banana cellulose microcrystals and ionic liquid according to the mass ratio of 1:20, and mix the banana cellulose microcrystals and ionic liquid, and then keep the temperature at 100°C Reflux and condense for 3 hours under the protection of nitrogen, then add acetic anhydride whose mass is 1.5 times the mass of the banana cellulose microcrystals for modification, and then continue to stir at a temperature of 90°C for 3 hours under the protection of nitrogen to obtain banana fiber vegan microcrystalline hydrosol; and,

[0054] Step 2, prepare banana cellulose microcrystal / polylactic acid airgel: first take polylactic acid and methylene chloride according to the mass volume ratio of 1.8:10, and dissolve the polylactic acid in met...

Embodiment 1

[0075] 1.1 Main raw materials and equipment

[0076] Table 1 Main raw materials

[0077]

[0078] Table 2 Main instruments and equipment

[0079]

[0080]

[0081] 2 Experimental steps

[0082] 2.1 Production of banana fibrils

[0083] First, the banana stems are peeled off, cut into long strips with a width of about 4 cm, then dehydrated in the sun, and finally placed in a vacuum drying oven at a constant temperature of 60°C for drying. In this experiment, the chemical method is used to extract fiber from banana stems. The process is: pre-acid treatment→alkaline treatment→simmering→washing and bleaching→acid. The cost of this method is very low, and the preparation method is simple. Banana fiber.

[0084] The present invention adopts following steps to process banana stem bast:

[0085] (1) Beat the banana bark, rinse it with water, and dry it for later use. In this way, a large part of impurities can be removed in advance, and it can be used for a long time af...

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Abstract

The invention discloses a preparation method of a banana cellulose crystallite/polylactic acid aerogel. The preparation method comprises the following steps: step one, taking banana cellulose crystallite and ionic liquid and blending the banana cellulose crystallite and the ionic liquid, then performing reflux condensation for 3 hours under the protection of nitrogen at the constant temperature of 100 DEG C, then adding acetic oxide for modification, and then continuously stirring for 3 hours at the temperature of 90 DEG C under the protection of nitrogen to obtain a banana cellulose crystallite hydrosol; and step two, firstly taking polylactic acid and dichloromethane in the mass-to-volume ratio of 1.8: 10, dissolving the polylactic acid in the dichloromethane, then putting the banana cellulose crystallite hydrosol obtained in the step one into the dichloromethane dissolved with the polylactic acid, and then blending to obtain a crude banana cellulose crystallite/polylactic acid aerogel product. The invention also discloses the banana cellulose crystallite/polylactic acid aerogel. The invention also discloses use of the banana cellulose crystallite/polylactic acid aerogel for oil absorption.

Description

technical field [0001] The invention relates to banana cellulose microcrystal / polylactic acid airgel, a preparation method of banana cellulose microcrystal / polylactic acid airgel, and an application of banana cellulose microcrystal / polylactic acid airgel. Background technique [0002] Aerogels are highly porous nanostructured materials, which have been widely used in the fields of catalyst adsorbents and elastic conductors due to their low density, high porosity, and high specific surface area. The traditional preparation materials of aerogels are mostly silicon and metal oxides. A common disadvantage of these aerogel materials is that the materials are relatively brittle, which limits the application of aerogels to a certain extent. In order to prepare lightweight and high-strength airgel, plant cellulose is selected as the raw material. [0003] As a new third-generation material, cellulose aerogel surpasses silicon aerogel and polymer-based aerogel, and incorporates its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/02C08L1/02C08L67/04C08B15/08D21C5/00
Inventor 庞锦英莫羡忠谭登峰黄雪梅刘钰馨李静雨
Owner GUANGXI TEACHERS EDUCATION UNIV
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