 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 2 | 1/1 | 返回列表 |
| 查看: 691 | 回復(fù): 1 | |||
282347421金蟲 (小有名氣)
|
[交流]
【求助】固體酸堿雙功能催化劑 已有1人參與
|
|
2.1. “One-pot” catalyst synthesis Siloxane starting materials were purchased from Gelest. Tri- block copolymer poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) P123 (4.0 g, 0.688 mmol, Mn 5800) was weighed into a Teflon bottle. Then 2.0 M HCl (120.0 mL, 240.0 mmol) and H2O (6.0 mL, 333.0 mmol) were added and stirred at 40 ◦C until the P123 was fully dis- solved. TEOS (8.2 mL, 37.8 mmol) was then added to the reaction, and the mixture was stirred at 40 ◦C for another 45 min prehydrolysis time. Then 2-(4-chlorosulfonylphenyl)- ethyltrimethoxysilane (0.65 g, 50/50 w/w solution in dichloro- methane, 1.0 mmol) was added, to allow for hydrolysis of the sulfonyl chloride, followed by 3-aminopropyltrimethoxysilane (0.19 mL, 1.0 mmol). The respective acid component was sub- stituted for the sulfonyl chloride for different acid functional- izations. This mixture was stirred at 40 ◦C for 20 h, then aged at 100 ◦C for 24 h. The mixture was then cooled to room temper- ature, and the resulting solid was filtered and rinsed repeatedly with excess H2O (4 × 500 mL), then allowed to dry overnight on an aspirating filter. The dried solid was then extracted with EtOH (400 mL per g) by refluxing in EtOH for 24 h to remove P123. The solid was again filtered and rinsed repeatedly with EtOH (4 × 500 mL), then dried overnight on the aspirator to obtain a dry white solid, which was further dried at 80 ◦C under vacuum for 24 h. 大家?guī)兔獯鹨幌�，上述為一篇固體酸堿雙功能催化劑的制備方法，想請教一下，他是在酸性情況下制備的，那么最后表面的堿性胺應(yīng)該會被“質(zhì)子”化，那么怎么去質(zhì)子化，是不是用過量的水沖洗就可以了？ |
回復(fù)此樓» 猜你喜歡
求助電催化劑制備，怎么在碳布表面生長PdCo合金
已經(jīng)有0人回復(fù)
-
求助電催化劑制備，怎么在碳布表面生長PdCo合金
已經(jīng)有1人回復(fù)
-
專業(yè)論文潤色/翻譯怎么收費(fèi)?
已經(jīng)有195人回復(fù)
-
304求調(diào)劑
已經(jīng)有5人回復(fù)
-
上海華東理工大學(xué)機(jī)械與動力工程學(xué)院先進(jìn)材料與制造研究組招聘公告
已經(jīng)有0人回復(fù)
-
304求調(diào)劑
已經(jīng)有6人回復(fù)
-
ANSYS 靜態(tài)結(jié)構(gòu) 多線性隨動硬化 應(yīng)變值怎么計算
已經(jīng)有1人回復(fù)
-
304求調(diào)劑
已經(jīng)有1人回復(fù)
-
雙一流湘潭大學(xué)化工學(xué)院招收化工、能源動力、工程熱物理相關(guān)研究生調(diào)劑
已經(jīng)有10人回復(fù)
-
中藥學(xué)306，求調(diào)劑
已經(jīng)有0人回復(fù)
經(jīng)世濟(jì)民
禁蟲 (正式寫手)
|
本帖內(nèi)容被屏蔽 |
2樓2010-04-23 23:36:32
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 282347421 的主題更新
| 2 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 材料與化工（0856）304求B區(qū)調(diào)劑 +3 | 邱gl 2026-03-20 | 7/350 |
|
|---|---|---|---|---|
|
[考研] 一志愿南大，0703化學(xué)，分?jǐn)?shù)336，求調(diào)劑 +3 | 收到VS 2026-03-21 | 3/150 |
|
|
|
[考研] 0703化學(xué)297求調(diào)劑 +3 | Daisy☆ 2026-03-20 | 3/150 |
|
|
|
[考研] 268求調(diào)劑 +9 | 簡單點(diǎn)0 2026-03-17 | 9/450 |
|
|
|
[考研] 316求調(diào)劑 +6 | 梁茜雯 2026-03-19 | 6/300 |
|
|
|
[考研] 307求調(diào)劑 +10 | 冷笙123 2026-03-17 | 10/500 |
|
|
|
[考研] 324分 085600材料化工求調(diào)劑 +4 | llllkkkhh 2026-03-18 | 4/200 |
|
|
|
[考研] 一志愿武理材料305分求調(diào)劑 +6 | 想上岸的鯉魚 2026-03-18 | 7/350 |
|
|
|
[考研] 一志愿 西北大學(xué) ，070300化學(xué)學(xué)碩，總分287，雙非一本，求調(diào)劑。 +3 | 晨昏線與星海 2026-03-18 | 3/150 |
|
|
|
[考研] 材料專業(yè)求調(diào)劑 +6 | hanamiko 2026-03-18 | 6/300 |
|
|
|
[考研] 324求調(diào)劑 +5 | lucky呀呀呀鴨 2026-03-20 | 5/250 |
|
|
|
[考研] 287求調(diào)劑 +7 | 晨昏線與星海 2026-03-19 | 8/400 |
|
|
|
[考研] 260求調(diào)劑 +3 | 朱芷琳 2026-03-20 | 3/150 |
|
|
|
[考研] 招收調(diào)劑碩士 +4 | lidianxing 2026-03-19 | 12/600 |
|
|
|
[考研]
 320求調(diào)劑0856
+3
|
不想起名字112 2026-03-19 | 3/150 |
|
|
|
[考研] 334求調(diào)劑 +3 | 志存高遠(yuǎn)意在機(jī)?/a> 2026-03-16 | 3/150 |
|
|
|
[考研] 301求調(diào)劑 +4 | A_JiXing 2026-03-16 | 4/200 |
|
|
|
[考研] 326求調(diào)劑 +5 | 上岸的小葡 2026-03-15 | 6/300 |
|
|
|
[論文投稿] 有沒有大佬發(fā)小論文能帶我個二作 +3 | 增銳漏人 2026-03-17 | 4/200 |
|
|
|
[考研] 東南大學(xué)364求調(diào)劑 +5 | JasonYuiui 2026-03-15 | 5/250 |
|