Chitosan gels, 3. The formation of gels by reaction of chitosan with glutaraldehyde
書誌事項
- 公開日
- 1989-05
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1002/macp.1989.021900504
- 公開者
- Wiley
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>The effects of several variables on the gelation behaviour of the chitosan/glutaraldehyde system have been studied. The rate of gelation is increased by increase in concentration of either chitosan or glutaraldehyde, or by an increase in temperature, and reduced by an increase in the concentration of acetic acid. Addition of a number of neutral electrolytes also causes an increase in the rate of gelation, the increase being larger the greater the activity coefficient of the electrolyte. UV/visible and NMR spectra of glutaraldehyde, acetaldehyde and crotonaldehyde, together with those of their 2,4‐dinitrophenylhydrazine derivatives, indicate that only a very small proportion (<0,15%) of the aldehyde groups have undergone an aldol condensation reaction leading to α,β‐unsaturated aldehyde groups. This, together with other evidence, suggests that the cross‐linking mechanism involves formation of Schiff's base structures rather than Michael‐type adducts as previously postulated.</jats:p>
収録刊行物
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- Die Makromolekulare Chemie
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Die Makromolekulare Chemie 190 (5), 951-960, 1989-05
Wiley