Preparation of tannin gel by enzyme-mimetic reaction of condensed tannin without use of crosslinking agent

详细信息    查看全文

• 作者：Jun-Ichi Kadokawa ; Daisuke Shinohara ; Akihiko Takegawa ; Masa-aki Murakami ; Yoshiro Kaneko and Tomoaki Matsuo
• 关键词：Condensed tannin ; Enzyme ; mimetic ; Hematin ; Crosslinking ; Gel
• 刊名：Colloid & Polymer Science
• 出版年：2008
• 出版时间：April, 2008
• 年：2008
• 卷：286
• 期：4
• 页码：481-485
• 全文大小：184.3 KB

文摘

Preparation of tannin gels was attempted by means of enzyme-mimetic reaction of condensed tannin without use of crosslinking agent. The gelation of condensed tannin was performed in the presence of H₂O₂ catalyzed by hematin of a ferriprotoporphyrin complex in water. The compressive measurements of the gels obtained by the 30–50 wt % concentrations of the tannin using 0.20–0.50 ml of 30 w/v % H₂O₂ aq. were examined. There is a tendency for the compressive properties of the gels obtained from the higher concentrations of the tannin and the larger amounts of H₂O₂ to be superior. The obtained gel was characterized by means of IR spectroscopy. Moreover, the obtained tannin gel was compatibilized with natural rubber to form a composite material.