Preparation method of carboxymethyl cellulose lithium
A technology of carboxymethyl cellulose and refined cotton, which is applied in the field of chemical modification of natural polymer materials, can solve the problems of material process loss and long process cycle, and achieve the effects of low raw material consumption, uniform reaction and good solubility
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0025] Add 200ml of isopropanol, 15g of lithium hydroxide, and 115g of water into the three-mouth sesame cake, mix and stir, add 10g of crushed refined cotton after 10 minutes, and turn on N 2 , Alkaline at 20°C for 2.5h, weigh 30.5g of chloroacetic acid and dissolve it in 22g of isopropanol, drop it into a three-necked flask and mix for 40min, heat up to 50°C for etherification for 1h, dissolve 10g of lithium hydroxide in 77g of water, pass through a peristaltic pump Slowly add to the three-mouth sesame cake, react for 1 hour, the reaction temperature rises to 75°C and react for 40 minutes, cool to room temperature, neutralize with acetic acid, and filter and wash with 80% isopropanol for three times, then bake the material.
[0026] The obtained CMC-Li: DS=0.53, the viscosity of 1% aqueous solution measured by rotational viscometer is 4100cP, the light transmittance of 1% aqueous solution is 35.0%, the purity is 99.0%, and the Na salt is 0.10%wtD.
Embodiment 2
[0028] Add 200ml of isopropanol, 12g of lithium hydroxide, and 93g of water into the three-mouth sesame cake, mix and stir, add 10g of crushed refined cotton after 10 minutes, and turn on N 2 , Alkaline at 20°C for 3h, weigh 22g of chloroacetic acid and dissolve it in 18g of isopropanol, drop it into a three-necked flask and mix for 40min, raise the temperature to 50°C for etherification for 1h, dissolve 6g of lithium hydroxide in 47g of water, and pass through a peristaltic pump very slowly Add it into the three-mouth sesame cake, react for 1 hour, the reaction temperature rises to 75°C and react for 40 minutes, then cool to room temperature, neutralize with acetic acid and become neutral, use 80% isopropanol to filter and wash three times, and then bake the material.
[0029] The obtained CMC-Li: DS=0.41, the viscosity of 1% aqueous solution measured by rotational viscometer is 4200cP, the light transmittance of 1% aqueous solution is 37.0%, the purity is 99.0%, and the Na sa...
Embodiment 3
[0031] Add 180ml of isopropanol, 15g of lithium hydroxide, and 115g of water into the three-mouth sesame cake, mix and stir, add 10g of crushed refined cotton after 10 minutes, and turn on N 2, Alkaline at 20°C for 2h, weigh 30.5g of chloroacetic acid and dissolve it in 22g of isopropanol, drop it into a three-neck flask and mix for 40min, heat up to 55°C for etherification for 1h, dissolve 10g of lithium hydroxide in 77g of water, and pass through the peristaltic pump very slowly Add it to the three-mouthed sesame cake, react for 1 hour, and the reaction temperature rises to 75°C for 40 minutes, then cools to room temperature, neutralizes with acetic acid and becomes neutral, filters and washes with 80% isopropanol for three times, and then bakes.
[0032] The obtained CMC-Li: DS=0.49, the viscosity of 1% aqueous solution measured by rotational viscometer is 4300cP, the light transmittance of 1% aqueous solution is 33.0%, the purity is 99.0%, and the Na salt is 0.10%wtD.
PUM
| Property | Measurement | Unit |
|---|---|---|
| transmittivity | aaaaa | aaaaa |
| transmittivity | aaaaa | aaaaa |
| transmittivity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More