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Heteropolyacid salt loaded cellulose porous material and preparation method thereof

A technology for heteropolyacid salts and porous materials, which is applied in the field of heteropolyacid salt supported cellulose porous materials and their preparation, can solve the problems of small specific surface area and low surface modification density of cellulose fabrics, and achieves low density and improved density. Mechanical properties, the effect of broad application prospects

Inactive Publication Date: 2018-10-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Allen, N.E., et al. et al. used aminosilane to modify cellulose fabrics to immobilize heteropolyacids for oxidative removal of organic matter, but they still face the disadvantages of small specific surface area of ​​cellulose fabrics and low surface modification density.

Method used

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  • Heteropolyacid salt loaded cellulose porous material and preparation method thereof
  • Heteropolyacid salt loaded cellulose porous material and preparation method thereof
  • Heteropolyacid salt loaded cellulose porous material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Get 10.0g solid content 1.2wt.% nanocellulose suspension, add 3-(2,3-epoxypropoxy)propyltrimethoxysilane (0.12g), polyethyleneimine (0.12g) , and stirred at room temperature for 4 h to obtain polyethyleneimine-modified cellulose nanowire suspension.

[0032] (2) Place the suspension prepared in (1) into liquid nitrogen for quick freezing, the cooling time is 10min, and then freeze-dry in a freeze dryer, the freezing time is 24 hours, the temperature is -30°C, and the pressure is 20Pa, Then put it in an oven and bake at 110° C. for 30 minutes to hydrolyze and crosslink the silane to obtain a polyethyleneimine-modified cellulose porous material.

[0033] (3) Take the cellulose porous material and impregnate it in 2mg / mL Ru 4 In the heteropoly acid salt solution (mass ratio of cellulose porous material to heteropoly acid salt solution: 1:1000), use 12mol / L hydrochloric acid to adjust the pH value of the solution to 7.0, immerse for 12 hours, and temperature 25°C.

[...

Embodiment 2

[0039] (1) Get 10.0g solid content 1.2wt.% nanocellulose suspension, add 3-(2,3-epoxypropoxy)propyltrimethoxysilane (0.24g), polyethyleneimine (0.12g) , and stirred at room temperature for 4 h to obtain polyethyleneimine-modified cellulose nanowire suspension.

[0040] (2) Place the suspension prepared in (1) into liquid nitrogen for quick freezing, the cooling time is 10min, and then freeze-dry in a freeze dryer, the freezing time is 24 hours, the temperature is -30°C, and the pressure is 20Pa, Then put it in an oven and bake at 110° C. for 30 minutes to hydrolyze and crosslink the silane to obtain a polyethyleneimine-modified cellulose porous material.

[0041] (3) Take the cellulose porous material and impregnate it in 2mg / mL Na 10 [Co 4 (H 2 O) 2 (PW 9 o 34 ) 2 ] In the heteropoly acid salt solution (the mass ratio of the cellulose porous material to the heteropoly acid salt solution is 1:1000), use 12mol / L hydrochloric acid to adjust the pH value of the solution to...

Embodiment 3

[0047] (1) Get 10.00g solid content 1.2wt.% nano-cellulose suspension, add 2-(3,4-epoxycyclohexyl) ethyltriethoxysilane (0.12g), polyethyleneimine ( 0.12 g), stirred at room temperature for 4 h to obtain polyethyleneimine modified cellulose nanowire suspension.

[0048] (2) Place the suspension prepared in (1) into liquid nitrogen for quick freezing, the cooling time is 10min, and then freeze-dry in a freeze dryer, the freezing time is 24 hours, the temperature is -30°C, and the pressure is 20Pa, Then put it in an oven and bake at 110° C. for 30 minutes to hydrolyze and crosslink the silane to obtain a polyethyleneimine-modified cellulose porous material.

[0049] (3) Take the cellulose porous material and impregnate it in 2mg / mL [(n-C 4 h 9 ) 4 N] 3 [H 3 V 10 o 28 ] In the heteropolyacid salt acetonitrile solution (mass ratio of cellulose porous material to heteropolyacid salt solution is 1:1000), use 12mol / L hydrochloric acid to adjust the pH value of the solution to ...

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Abstract

The invention relates to a heteropolyacid salt loaded cellulose porous material and a preparation method thereof. The preparation method includes: taking cellulose as a framework, epoxy silane as a crosslinking agent and polyethyleneimine as an active site; adopting freeze-drying to obtain a cellulose porous material; adsorbing and fixing to obtain the loaded cellulose porous material. The heteropolyacid salt loaded cellulose porous material has the advantages of large specific surface area, small density, excellent resilience performance and biodegradability and meets ecological and environment-protection requirements; heteropolyacid salt has wide application prospect, so that the cellulose porous material has wide application prospect in the field of energy sources, clean production, catalytic synthesis, pollutant degradation and drug loading.

Description

technical field [0001] The invention belongs to the field of cellulose porous materials, in particular to a heteropolyacid salt loaded cellulose porous material and a preparation method thereof. Background technique [0002] Heteropolyacids (POM), also known as metal-oxygen clusters, have a unique complex structure and high negative charge, and are widely used in the fields of green petroleum, medicine, environmental cleaning and catalysis. Common heteropoly acid salts are easily soluble in organic solvents, causing problems such as difficult separation and difficult recycling after use, thereby limiting the scope of use; on the other hand, heteropoly acid salts have high-valent metal ions, and if they cannot be effectively recovered serious threat to the environment. How to find a suitable carrier of heteropolyacids and efficiently immobilize heteropolyacids has become an urgent need. The common immobilization method of heteropolyacid salt is electrostatic immobilization ...

Claims

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Application Information

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IPC IPC(8): C08J9/40C08J9/28C08L1/02C08L1/28C08L1/04C08L79/08C08K5/5435
CPCC08J9/0042C08J9/28C08J9/40C08J2301/02C08J2301/28C08J2401/04C08J2479/02C08K5/5435
Inventor 隋晓锋张聪聪侯煜李海燕王碧佳毛志平徐红张琳萍钟毅
Owner DONGHUA UNIV
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