Starch blended cellulose aerogel as well as preparation and application thereof

A cellulose aerogel, microcrystalline cellulose technology, applied in aerogel preparation, colloid chemistry, colloid chemistry and other directions, can solve the problems of expensive materials, complex preparation process, etc., achieve low-cost raw materials, simplify the preparation process, Take advantage of the effect

Active Publication Date: 2019-04-26
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scientists try to enhance the oil absorption function and improve the mechanical properties of cellulose airgel by mixing cellulose with MnFe2O4, SiO2, chitosan and other materials, but the application is limited due to the expensive materials or complicated preparation process
The present invention uses starch blended cellulose to prepare airgel, which can make full use of cheap raw materials, simplify the preparation process, and at the same time significantly enhance the oil absorption function, creep resistance and dynamic viscoelasticity of cellulose-based airgel. See the study of adding starch to improve the performance of cellulose-based airgel

Method used

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  • Starch blended cellulose aerogel as well as preparation and application thereof
  • Starch blended cellulose aerogel as well as preparation and application thereof
  • Starch blended cellulose aerogel as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0062] Specific embodiment 1: A preparation method and performance characterization of starch blended cellulose airgel

[0063] 1. Preparation of starch blended cellulose airgel

[0064] 1. Starch blended cellulose wet gel system

[0065] (1) prepare the blend solution of microcrystalline cellulose, high amylose cornstarch and water

[0066] Accurately weigh 4 g (accurate to 0.0001 g) of microcrystalline cellulose and high-amylose cornstarch into a beaker, and the mass ratio of microcrystalline cellulose to high-amylose cornstarch is 19:1. Measure 81 mL of distilled water and add it to the mixture of microcrystalline cellulose and high amylose corn starch to form a suspension of 0.049 g / mL. A sample without high amylose corn starch was used as a blank control. The suspension was sheared at a high speed of 8000r / min for 10min.

[0067] (2) High pressure homogeneous treatment

[0068] The mixed solution of sheared and refined microcrystalline cellulose and starch was homoge...

specific Embodiment approach 2

[0090] Embodiment 2: A preparation method and performance characterization of starch blended cellulose airgel

[0091] 1. Preparation of starch blended cellulose airgel

[0092] 1. Starch blended cellulose wet gel system

[0093] (1) prepare the blend solution of microcrystalline cellulose, high amylose cornstarch and water

[0094] Accurately weigh 4 g (accurate to 0.0001 g) of microcrystalline cellulose and high-amylose cornstarch into a beaker, and the mass ratio of microcrystalline cellulose and high-amylose cornstarch is 9:1. Measure 81 mL of distilled water and add it to the mixture of microcrystalline cellulose and high amylose corn starch to form a suspension of 0.049 g / mL. A sample without high amylose corn starch was used as a blank control. The suspension was sheared at a high speed of 8000r / min for 10min.

[0095] (2) High pressure homogeneous treatment

[0096] The mixed solution of sheared and refined microcrystalline cellulose and starch was homogenized und...

specific Embodiment approach 3

[0118] Embodiment 3: A preparation method and performance characterization of starch blended cellulose airgel

[0119] 1. Preparation of starch blended cellulose airgel

[0120] 1. Starch blended cellulose wet gel system

[0121] (1) prepare the blend solution of microcrystalline cellulose, high amylose cornstarch and water

[0122] Accurately weigh 4 g (accurate to 0.0001 g) of microcrystalline cellulose and high-amylose cornstarch into a beaker, and the mass ratio of microcrystalline cellulose to high-amylose cornstarch is 17:3. Measure 81 mL of distilled water and add it to the mixture of microcrystalline cellulose and high amylose corn starch to form a suspension of 0.049 g / mL. A sample without high amylose corn starch was used as a blank control. The suspension was sheared at a high speed of 8000r / min for 10min.

[0123] (2) High pressure homogeneous treatment

[0124] The mixed solution of sheared and refined microcrystalline cellulose and starch was homogenized und...

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Abstract

The invention provides a starch blended cellulose aerogel as well as preparation and application thereof. The cellulose aerogel is modified by utilizing starch, and the starch blended cellulose aerogel is prepared through high pressure homogeneous blending and vacuum freeze drying. Due to the strong hydrophilicity of the starch, the starch is copolymerized with cellulose whiskers after being micronized and aged, the performance of the cellulose aerogel is improved, cheap materials are fully used, the flow of the preparation process is simplified, and a rich source is provided for the improvement on comprehensive performance of a composite. Compared with the common cellulose aerogel, the starch blended cellulose aerogel has the advantages of small density, high porosity, small volume shrinkage, good oil absorption property, excellent dynamic viscoelasticity and the like.

Description

technical field [0001] The invention relates to cellulose-based airgel, in particular to a starch blended cellulose airgel and its preparation and application. Background technique [0002] At present, the most commonly used methods of treating water pollution include physical treatment, chemical treatment and biological treatment, among which adsorption in the physical treatment method is the most simple and feasible, so it is the most commonly used. Natural material adsorbents include wheat straw, rice husk ash, resin, etc., but they have not been widely used due to their shortcomings such as poor adsorption and poor reusability. SiO 2 Inorganic aerogels such as aerogels and graphene oxide aerogels have the advantages of high absorption rate, high porosity, and large specific surface area, but they cannot be degraded, may cause secondary pollution, and have disadvantages such as high cost, which greatly limit their applications. scope. Therefore, it is imminent to prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L1/02C08L3/12B01J13/00B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J13/0091B01J20/24B01J20/28047C02F1/286C08J9/28C08J2301/02C08J2403/12
Inventor 吴敏罗琪宿佃斌李栋
Owner CHINA AGRI UNIV
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