반응 #8951

반응 방정식

L-histidine methyl ester dihydrochloride

disodium phosphate 12 hydrate

polyoxyethylene lauryl ether

→

L-histidine

용매

water

sodium hydroxide

반응 조건

후처리

1. 1
   기타to prepare a treating agent solution
2. 2
   workup.ADDITIONtreated
3. 3
   세척washed with water
4. 4
   기타dried
5. 5
   기타to uniformly absorb the total amount of the above treating agent solution
6. 6
   기타air-dried for 3 hours at room temperature
7. 7
   workup.ADDITIONThe dried cloth was heat-treated for 20 minutes at 140° C. in a batch type hot air oven (“IPHH-2000”, an inert oven manufactured by Tabaiesbeck Co., Ltd.)
8. 8
   세척washed with water
9. 9
   세척It was further washed with 5% aqueous sodium bicarbonate solution
10. 10
    세척rinsed three times with water
11. 11
    세척subsequently washed with 10% aqueous succinic acid solution
12. 12
    세척rinsed three times with water
13. 13
    세척finally washed with household
14. 14
    세척washing detergent solution
15. 15
    세척rinsed with water
16. 16
    기타air-dried

실험 절차

2.42 Grams (10 mmol) of L-histidine methyl ester dihydrochloride, 1.11 g (3.1 mmol) of disodium phosphate 12 hydrate and 0.1 g of polyoxyethylene lauryl ether (“Newcol 1100”, nonionic surfactant produced by Nippon Nyukazai Co., Ltd.) were dissolved in 5.0 ml of water to prepare a treating agent solution. A cotton cloth (150 mm×170 mm, 4.8 g) was in advance treated to be immersed in 25% aqueous sodium hydroxide solution for an hour at room temperature, washed with water and dried. This treated cotton cloth was allowed to uniformly absorb the total amount of the above treating agent solution and then air-dried for 3 hours at room temperature. The dried cloth was heat-treated for 20 minutes at 140° C. in a batch type hot air oven (“IPHH-2000”, an inert oven manufactured by Tabaiesbeck Co., Ltd.) and washed with water. It was further washed with 5% aqueous sodium bicarbonate solution and rinsed three times with water and subsequently washed with 10% aqueous succinic acid solution and rinsed three times with water, and finally washed with household washing detergent solution, rinsed with water and air-dried. The identification of L-histidine cellulose ester was conducted by the following method. A part of the cloth was cut and a solution of ninhydrin in butanol was sprayed on it. Thereafter, it was heated for 10 minutes in an oven of 110° C. to cause coloring thereby the presence of the amino acid was confirmed. Also, a part of the cloth was cut and subjected to an infrared spectroscopic analysis whereby there was confirmed a peak based on ester bond at 1730–1750 cm−1. As a result of determination for the amount of the bonded L-histidine, it was 0.17 mmol based on 1 g of the cloth. The degree of esterfication was 0.028. Also, the amount of succinic acid was 0.18 mmol.

출처