| 查看: 207 | 回复: 1 | |||
| 当前主题已经存档。 | |||
songlaoda银虫 (初入文坛)
|
[交流]
修改摘要2009年11月20日
|
||
| The cellulose ionic liquids of 1-butyl-3-methylimidazolium chloride [BMIM]Cl and 1-allyl-3-methylimidazolium chloride [AMIM]Cl were prepared by one-step method respectively, which were characterized by FTIR. They were then used to treat cotton cellulose in order to improve the enzymatic hydrolysis. The results showed that the reducing sugar concentration of regenerated cotton cellulose treated with [BMIM]Cl and [AMIM]Cl was improved, being only 18.14gL-1 for untreated one. In contrast, dissolving capacity of [AMIM]Cl was better than [BMIM]Cl at the same temperature condition with the reducing sugar concentration being 41.99gL-1 and 41.47gL-1 at their optimal temperature 180℃ and 170℃ respectively. At 180℃, maximum solubility of cotton cellulose in [BMIM]Cl and [AMIM]Cl was both 19%. SEM images revealed that the surfaces of regenerated cellulose treated by ionic liquids have become rough and dense regular structure of the original was spoiled. There was serious corrosion in many areas on the surface of regenerated cellulose. XRD measurements showed that the crystalline size of regeneration cotton cellulose was significantly reduced, which indicating that crystallinity of cellulose was decreased because of ionic liquids being conducive to further digestion. |
回复此楼» 猜你喜欢
课题组招2027级博士 上海工程技术大学 激光智能制造方向
已经有4人回复
-
现代”学阀”该如何界定
已经有8人回复
-
上海工程技术大学 激光智能制造课题组 2027级博士研究生招生
已经有3人回复
-
实名举报：华南理工大学物理与光电学院副院长李志远婚内两次出轨女学生（博士）
已经有16人回复
-
上海工程技术大学激光智能制造课题组｜2027级博士研究生招生公告
已经有11人回复
-
上海工程技术大学激光智能制造课题组招收博士研究生
已经有10人回复
-
申博发邮件
已经有11人回复
-
各位大神，目前国内有哪些比较好用的逆合成软件？
已经有12人回复
-
我的奶奶
已经有3人回复
-
国社科系统bug了，是不是要放榜了？
已经有9人回复
xpy111
铁杆木虫 (著名写手)
- 应助: 0 (幼儿园)
- 金币: 8529.3
- 散金: 60
- 帖子: 2414
- 在线: 105.7小时
- 虫号: 199885
- 注册: 2006-02-27
- 性别: GG
- 专业: 生物医学传感
★ ★ ★ ★
小木虫(金币+0.5):给个红包，谢谢回帖交流
sirljz(金币+3,VIP+0):谢谢交流 11-22 17:25
小木虫(金币+0.5):给个红包，谢谢回帖交流
sirljz(金币+3,VIP+0):谢谢交流 11-22 17:25
| The cellulose ionic liquids of 1-butyl-3-methylimidazolium chloride [BMIM]Cl and 1-allyl-3-methylimidazolium chloride [AMIM]Cl were prepared by one-step method, respectively, and they were characterized by FTIR. They were used to treat cotton cellulose in order to improve the enzymatic hydrolysis. The results showed that the reducing sugar concentration of regenerated cotton cellulose treated with [BMIM]Cl and [AMIM]Cl was both improved, being only 18.14 gL-1 for untreated one (没有给出treated之后是多少，这个18.14的意义何在？). In contrast, dissolving capacity of [AMIM]Cl was better than [BMIM]Cl under the same temperature conditions with the reducing sugar concentration being 41.99 gL-1 and 41.47 gL-1 at their optimal temperature 180℃ and 170℃ ,respectively. At 180℃, maximum solubility of cotton cellulose in [BMIM]Cl and [AMIM]Cl was both 19%. SEM images revealed that the surfaces of regenerated cellulose treated by ionic liquids have become rough and dense regular structure of the original was spoiled. Serious corrosion was abserved in many areas on the surface of regenerated cellulose. XRD measurements showed that the crystalline size of regenerated cotton cellulose was significantly reduced, indicating that crystallinity of cellulose was decreased because ionic liquids was conducive to further digestion. |
2楼2009-11-22 16:57:11