Method for preparing adsorbable oxycellulose through ramie oxidation degumming process

Abstract

The invention provides a method for preparing adsorbable oxycellulose through a ramie oxidation degumming process. The method includes the steps that ramie original hemp serves as a raw material, the original hemp is smashed into short fibers through a smashing machine, and the short fibers are added with deionized water and soaked for pretreatment; a degumming solution is prepared from an oxidizing agent, a stabilizing agent, a fiber expanding agent, a penetrating agent, a chelating agent and water, the ramie original hemp and the degumming solution are mixed, gum in the ramie original hemp is fully removed by means of oxidizability of hyperoxide, and cellulose with active hydroxyl groups is oxidized into oxycellulose containing a great number of formyl groups; the oxycellulose is separated from water and dried to obtain the oxycellulose in the powder state. The method is simple in flow path, environmentally friendly, low in requirement for equipment and beneficial for large-scale production and has good economic and social benefits, the total reaction time is shortened, chemicals and cost are saved, efficiency is greatly improved, reaction conditions are moderate, and additional value of the cellulose is substantially increased.

Description

technical field

[0001] The invention relates to a method for preparing absorbable oxidized cellulose through oxidative degumming of ramie, and belongs to the technical field of natural fiber preparation and application of oxidized cellulose in the textile field. Background technique

[0002] Natural cellulose is widely distributed on the earth, and there are many sources of raw materials. It is an inexhaustible and inexhaustible organic renewable resource in nature. Cellulose itself is non-toxic, has strong water resistance, and meets the requirements of biodegradable and environment-friendly materials. As human beings pay more and more attention to environmental issues, the transformation and utilization of cellulose is an effective way to develop sustainable energy and green chemicals. The development of cellulose derivatives has become a hot research topic at home and abroad. Cellulose is a linear natural polymer compound formed by D-glucopyranose anhydroglucopyranose li...

Examples

Embodiment 1

[0026] A method for preparing adsorbable oxidized cellulose through oxidative degumming of ramie is as follows:

[0027] The raw ramie is crushed into short fibers with a fineness of 20 meshes with a pulverizer, put into a container with a sealing ring to balance the moisture, and measure the moisture regain of the short fibers to be 9.2%. The weighed short fiber quality is 21.20g, and its fiber dry weight is calculated according to the moisture regain to be 19.25g. Add deionized water to make the mass concentration of raw hemp cellulose at 1%, and soak for 24 hours to make it fully wet.

[0028] 1g of hydrogen peroxide, 0.5g of sodium benzoate, 0.4g of urea, 0.3g of sodium dodecylsulfonate, 0.3g of sodium polyacrylate, and 197.5g of water were added to make a degumming solution; Mix according to the mass ratio of 1:10, and use a 1000mL suction filter bottle as the reactor. The pH value of the degumming solution was adjusted to 10.0 with 0.1mol / L NaOH solution, and the mixtu...

Embodiment 2

[0032] A method for preparing adsorbable oxidized cellulose through oxidative degumming of ramie is as follows:

[0033] Raw ramie is crushed into short fibers with a fineness of 60 meshes with a pulverizer, put into a container with a sealing ring to balance the moisture, and measure the moisture regain of the short fibers to be 8.9%. The weighed short fiber quality is 22.02g, and its fiber dry weight is calculated according to the moisture regain to be 20.06g. Add deionized water to make the mass concentration of raw hemp cellulose at 3%, soak for 36 hours, and make it fully wet.

[0034] Add 2.0g of sodium periodate, 1.0g of sodium salicylate, 0.8g of thiourea, 0.6g of sodium dodecylbenzenesulfonate, 0.6g of sodium tartrate, and 195.0g of water to make a degumming solution; The fiber and the degumming reaction solution were mixed in a mass ratio of 1:10, and a 1000mL suction filter bottle was used as a reactor. The pH value of the degumming solution was adjusted to 14.0 w...

Embodiment 3

[0038] A method for preparing adsorbable oxidized cellulose through oxidative degumming of ramie is as follows:

[0039] The raw ramie is crushed into short fibers with a fineness of 40 meshes with a pulverizer, put into a container with a sealing ring to balance the moisture, and measure the moisture regain of the short fibers to be 9.2%. The weighed short fiber quality is 21.10g, and its fiber dry weight is calculated according to the moisture regain to be 19.16g. Add deionized water so that the mass concentration of raw hemp cellulose is 6%, soak for 48 hours, and make it fully wet.

[0040] Add 0.4g of sodium percarbonate, 0.1g of resorcinol, 0.1g of 4-methylmorpholine-N-oxide, 0.1g of polyvinyl alcohol, 0.1g of aminotrimethylene phosphonic acid, and add 199.2g of water to form a degumming solution ; The ramie raw hemp short fiber and the degumming reaction solution are mixed in a mass ratio of 1:10, and a 1000mL suction filter bottle is used as a reactor. The pH value o...

technical field

[0001] The invention relates to a method for preparing absorbable oxidized cellulose through oxidative degumming of ramie, and belongs to the technical field of natural fiber preparation and application of oxidized cellulose in the textile field. Background technique

[0002] Natural cellulose is widely distributed on the earth, and there are many sources of raw materials. It is an inexhaustible and inexhaustible organic renewable resource in nature. Cellulose itself is non-toxic, has strong water resistance, and meets the requirements of biodegradable and environment-friendly materials. As human beings pay more and more attention to environmental issues, the transformation and utilization of cellulose is an effective way to develop sustainable energy and green chemicals. The development of cellulose derivatives has become a hot research topic at home and abroad. Cellulose is a linear natural polymer compound formed by D-glucopyranose anhydroglucopyranose li...

Examples

Embodiment 1

[0026] A method for preparing adsorbable oxidized cellulose through oxidative degumming of ramie is as follows:

[0027] The raw ramie is crushed into short fibers with a fineness of 20 meshes with a pulverizer, put into a container with a sealing ring to balance the moisture, and measure the moisture regain of the short fibers to be 9.2%. The weighed short fiber quality is 21.20g, and its fiber dry weight is calculated according to the moisture regain to be 19.25g. Add deionized water to make the mass concentration of raw hemp cellulose at 1%, and soak for 24 hours to make it fully wet.

[0028] 1g of hydrogen peroxide, 0.5g of sodium benzoate, 0.4g of urea, 0.3g of sodium dodecylsulfonate, 0.3g of sodium polyacrylate, and 197.5g of water were added to make a degumming solution; Mix according to the mass ratio of 1:10, and use a 1000mL suction filter bottle as the reactor. The pH value of the degumming solution was adjusted to 10.0 with 0.1mol / L NaOH solution, and the mixtu...

Embodiment 2

[0032] A method for preparing adsorbable oxidized cellulose through oxidative degumming of ramie is as follows:

[0033] Raw ramie is crushed into short fibers with a fineness of 60 meshes with a pulverizer, put into a container with a sealing ring to balance the moisture, and measure the moisture regain of the short fibers to be 8.9%. The weighed short fiber quality is 22.02g, and its fiber dry weight is calculated according to the moisture regain to be 20.06g. Add deionized water to make the mass concentration of raw hemp cellulose at 3%, soak for 36 hours, and make it fully wet.

[0034] Add 2.0g of sodium periodate, 1.0g of sodium salicylate, 0.8g of thiourea, 0.6g of sodium dodecylbenzenesulfonate, 0.6g of sodium tartrate, and 195.0g of water to make a degumming solution; The fiber and the degumming reaction solution were mixed in a mass ratio of 1:10, and a 1000mL suction filter bottle was used as a reactor. The pH value of the degumming solution was adjusted to 14.0 w...

Embodiment 3

[0038] A method for preparing adsorbable oxidized cellulose through oxidative degumming of ramie is as follows:

[0039] The raw ramie is crushed into short fibers with a fineness of 40 meshes with a pulverizer, put into a container with a sealing ring to balance the moisture, and measure the moisture regain of the short fibers to be 9.2%. The weighed short fiber quality is 21.10g, and its fiber dry weight is calculated according to the moisture regain to be 19.16g. Add deionized water so that the mass concentration of raw hemp cellulose is 6%, soak for 48 hours, and make it fully wet.

[0040] Add 0.4g of sodium percarbonate, 0.1g of resorcinol, 0.1g of 4-methylmorpholine-N-oxide, 0.1g of polyvinyl alcohol, 0.1g of aminotrimethylene phosphonic acid, and add 199.2g of water to form a degumming solution ; The ramie raw hemp short fiber and the degumming reaction solution are mixed in a mass ratio of 1:10, and a 1000mL suction filter bottle is used as a reactor. The pH value o...