1987 Fiscal Year Final Research Report Summary
Studies on Synthesis and Activities of Non-Toxic Detergents Derived from Starch
| Project/Area Number |
60490002
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
広領域
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
MURAKAMI Kenkichi Chem. Res. Non-Agueous Soln., Tohoku Univ., Professor, 非水溶液化学研究所, 教授 (90006289)
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| Co-Investigator(Kenkyū-buntansha) |
HONKA Hisashi Chem. Res. Non-Agueous Soln., Tohoku Univ., Research Associate, 非水溶液研究所, 助手 (00181553)
OIKAWA Hidetoshi Chem. Res. Non-Agueous Soin., Tohoku Univ., Research Associate, 非水溶液化学研究所, 助手 (60134061)
ONO Katsumichi Chem. Res. Non-Agueous Soln., Tohoku Univ., Associate Professor, 非水溶液化学研究所, 助教授 (40006325)
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| Project Period (FY) |
1985 – 1987
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| Keywords | Starch / Amylose / Esterification / Surfactant / Emulsification / レオペキシー |
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| Research Abstract |
1. Synthesis of Long Chain Fatty Acid Esters of Amylose by Ester Exchange Reaction
The esterification of amylose was carried out in DMF with methyl stearate using potassium carbonate as catalyst. The yield of amylose esters was relatively low because of the alkaline hydrolysis at reducing end.
2. The Protection of Reducing End
In order to supress the alkaline hydrolysis, the reducing end of amylose was protected by reacting sodium borohydride. Monostearate of maltitol was successfully obtained by this method. The reactivity of reduced amylose, however, was low and highly esterified amylose could not be obtained by this method. 3. Esterification of Amylose by Stearoyl Chloride
1) Synthesis of Highly Esterified Amylose
Highly esterified amyloses with the digree of substitution per glucose residue being more than 1.0 were obtained by the reaction with stearoyl chloride with pyridine. Esters obtained from short chain amylose showed a W/O type emulsifying ability.
2) Synthesis of Water Soluble Esterified Amylose
Water soluble amylose esters were obtained in pyridine-formamide mixed solvent. The degree of substitution was less than 1.0. The agueous solutions of long chain amylose esters showed a rhopectic behavior and O/W type emulsifying ability.
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