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Preparation method of nano-composite lignin with fast deswelling performance

A nanocomposite, swelling technology, applied in the field of preparation of fast deswelling nanocomposite lignin, can solve the problems of slow temperature response rate, poor mechanical properties, decline, etc., achieve fast response rate and improve rapid deswelling performance Effect

Inactive Publication Date: 2018-03-16
成都昂多生物技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This lignin breaks through the traditional characteristics of poor mechanical properties of lignin, and has higher fracture strength and larger elongation ratio at break, and it is found that its mechanical strength increases with the increase of clay content. However, this high-strength lignin The response rate of nanocomposite lignin to temperature is relatively slow and decreases with the increase of clay content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 3 grams of clay and dissolve it into 28 grams of deionized water, place it in a 150 ml beaker and stir for 2 hours to form a solution, weigh 3 grams of (N-isopropylacrylamide), add it to the beaker and continue stirring for 40 minutes.

[0019] Weigh 2ml of Ni(OH) with a concentration of 1 g / L 2 Ultrasonic the aqueous solution of inorganic nanowires for 25 minutes, add it to the above aqueous solution, stir, add 0.01 g of α-ketoglutaric acid to the above solution, blow nitrogen gas for 30 minutes, and remove the residual oxygen in the solution;

[0020] Then inject the solution into a mold with a thickness of 0.2mm, keep it at 0°C, and initiate polymerization by ultraviolet light for 60 minutes;

[0021] Then soak the above product in 0.1M HCl solution for 2 hours, soak and rinse with distilled water repeatedly to remove excess Ni(OH) remaining inside the gel 2 and HC1, obtained nanocomposite lignin with fast deswellability.

[0022] The deswelling rate at T=50℃...

Embodiment 2

[0028] Weigh 3 grams of clay and dissolve it into 28 grams of deionized aqueous solution, place it in a 150 ml beaker and stir for 2 hours to form a solution, add 3 grams of (N-isopropylacrylamide) into the beaker and continue stirring.

[0029] Mix 2m1 of Ni(OH) at a concentration of 1 g / 1- 2 The aqueous solution of inorganic nanowires was ultrasonicated for 25 minutes and then added to the above solution. After stirring, 0.01 g of α-ketoglutaric acid was added to the above solution, and nitrogen gas was blown in for 30 minutes to remove residual oxygen in the solution. Then inject the solution into a mold with a thickness of 0.2mm, keep it at 10°C, and initiate polymerization by ultraviolet for 40 minutes;

[0030] Soak the above product in 0.1 M HCl aqueous solution for 4 hours, soak and rinse with distilled water repeatedly to remove excess Ni(OH) remaining inside the gel 2 and HCI, the obtained nanocomposite lignin with micropores.

[0031] The deswelling rate at T=50℃ ...

Embodiment 3

[0037] Dissolve 3 grams of clay into 28 grams of deionized aqueous solution, place in a 150 ml beaker and stir for 2 hours to form a solution, weigh 3 (N-isopropylacrylamide), add it to the beaker and continue stirring.

[0038] Weigh 2m1 of Ni(OH) with a concentration of 1 g / L 2 Inorganic nanowire aqueous solution was ultrasonically added to the above solution for 25 minutes, stirred, 0.01 gram of α-hydroxyalkyl phenone (Darocur 2959) was added to the above solution, and nitrogen gas was blown in for 30 minutes to remove residual oxygen in the solution, and then Inject the solution into a mold with a thickness of 0.2mm, keep it at 5°C, and initiate polymerization with ultraviolet light for 50 minutes;

[0039] Soak the product containing the above in 0.1m HCl aqueous solution for 8 hours, soak and rinse with distilled water repeatedly to remove excess Ni(OH) remaining inside the gel 2 and HC1, the obtained nanocomposite lignin with micropores.

[0040] The deswelling rate a...

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Abstract

The invention provides a nano-composite lignin with rapid deswellability and a preparation method thereof. The preparation method comprises the following steps: (1) mixing a crosslinking agent with water, then adding poly(N-isopropylacrylamide), stirring and mixing; (2) adding an aqueous solution of Ni(OH)2 inorganic nanowires to step (1) ) mixture, add an initiator, in an inert atmosphere, initiate polymerization under ultraviolet light, then soak the obtained product in an acid solution for 2 to 12 hours, and then wash to obtain a microporous structure with rapid deswelling Nanocomposite lignin. The response rate of the nanocomposite lignin of the present invention to temperature is relatively fast, and does not decrease with the increase of clay content. When the clay content reaches 15wt% of the gel, the gel is still temperature sensitive, and the temperature is constant in a 50°C water bath. Loss of water, about 30% weight loss within 1 hour.

Description

technical field [0001] The invention relates to a preparation method of fast deswellable nano composite lignin. Background technique [0002] In the past few decades, poly(N-isopropylacrylamide) (PNIPAAm) lignin, as a typical temperature-sensitive lignin, has attracted many researchers' research interest. Compared with traditional lignin, due to its unique properties, this thermosensitive lignin has been applied in many fields, such as: detection of protein ligands, drug release control, and microchannel components. [0003] PNIPAAm / clay lignin has a unique inorganic / organic three-dimensional network structure, and its water content can be as high as 90%. In the previous research, a kind of sodium pyrophosphate-modified saponite (Laponite XLS, Clay-S) was used as a crosslinking agent. The applicant disclosed a Chinese patent with publication number CN200610002977.8 A PNIPAAm / clay nanocomposite lignin with high clay content. This lignin breaks through the traditional chara...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08J9/26C08F120/54C08K9/04C08K3/34
CPCC08J9/28C08F120/54C08J9/26C08J2201/0442C08J2333/24C08K3/346C08K9/04
Inventor 丁伟
Owner 成都昂多生物技术有限责任公司
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