 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 6 | 1/1 | 返回列表 |
| 查看: 1731 | 回復: 5 | ||||
| 本帖產(chǎn)生 1 個 翻譯EPI ，點擊這里進行查看 | ||||
supee木蟲 (正式寫手)
|
[求助]
急求英語達人 （水平有限，高手可重新翻譯或在該版本上修改潤色）新手勿擾
|
|||
|
隨著經(jīng)濟的快速發(fā)展以及人們對環(huán)境重視程度的提高，聚砜膜分離技術以其高效、節(jié)能、環(huán)保、選擇性高、裝置靈活等特點，在工農(nóng)業(yè)水處理、海水淡化、生物醫(yī)學等方面有著廣泛的應用。聚砜由于其耐酸堿腐蝕，抗氧化能力強，具有優(yōu)良的力學性能，適合在壓力環(huán)境下使用，常被用于膜分離材料。但由于聚砜材料自身親水性差，膜分離過程中，生物懸浮物或大分子/膠體沉積易在膜表面和膜孔內(nèi)部造成膜污染。此外，聚砜質(zhì)脆，柔韌性較差的缺點也限制了其在其他領域的應用。 本文針對聚砜樹脂柔韌性不足、親水性差的問題，通過羥基封端的聚砜和異氰酸酯基封端的聚氨酯預聚體共聚制備聚氨酯改性聚砜樹脂，結合聚氨酯的結構特性，改善聚砜樹脂柔韌性和親水性。論文主要包括以下內(nèi)容：制備了以羥基封端的聚砜，得到一系列不同分子量聚砜，研究了該合成方法的最佳合成條件及影響因素；合成了以異氰酸酯（NCO）基團封端的聚氨酯預聚體；用羥基封端的聚砜和聚氨酯預聚體共聚，合成了聚氨酯改性聚砜（PSF-PU）樹脂，研究了其制備的最佳條件；利用 ATR-IR、1HNMR、GPC手段對聚氨酯改性聚砜樹脂的結構進行了表征；將改性的聚砜樹脂制備成膜，測試該膜材料的斷裂伸長率、抗張強度、表面接觸角，玻璃化轉(zhuǎn)變溫度等物理性能；將改性的聚砜樹脂制備成平板超濾膜，測定超濾膜的純水通量以及對PEG-10000分子的截留率等分離性能。再用牛血清蛋白模擬動態(tài)吸附，測試超濾膜在使用過程中的抗污染性。 通過調(diào)節(jié)聚砜以及聚氨酯改性聚砜樹脂的制備條件，研究各因素的影響，確定聚砜的合成最佳條件為：反應單體濃度40%，甲苯用量35 mL，帶水時間2 h，縮聚反應溫度160℃，時間4 h。聚氨酯改性聚砜樹脂的最佳合成條件為：反應溫度80℃，時間6 h；反應物濃度25%。 ATR-IR、1HNMR、GPC分析表明，聚砜的端羥基與聚氨酯預聚體的端異氰酸酯基發(fā)生了反應，聚氨酯預聚體與聚砜發(fā)生反應，具有聚氨酯特性的鏈段成功引入到聚砜上。 聚氨酯改性聚砜樹脂膜的玻璃化轉(zhuǎn)變溫度為188.33℃，比聚砜高2.75℃；斷裂伸長率為18.62%，比聚砜膜高4.38%；水接觸角比聚砜小21.5° ~ 22.3°，親水性得到提高。 聚氨酯改性聚砜樹脂超濾膜的純水通量增加4.36 mL•cm-2•h-1，對于PEG-10000分子的截留率提高4%，分離性能提高；對牛血清蛋白的總污染度減小0.18389，不可逆污染減小減少0.12243，抗污染性能提高。 將聚氨酯改性聚砜樹脂超濾膜和聚砜超濾膜處理皮革脫毛廢水測定超濾膜對廢水中的硫化物、COD、色度、懸浮物及灰分的截留率。測定結果表明聚氨酯改性聚砜樹脂超濾膜相比聚砜超濾膜對于皮革脫毛廢水中的各項指標均有較高的截留率。 Because of the rapid economic development and the continuous improvement of people's attention to the environment, polysulfone separation membrane technology, depending on its high efficiency, energy saving, environmental protection, high selectivity and device flexibility, has been widely used in the industrial and agricultural water treatment, desalination, biomedical applications and so on. Due to its acid and base resistance, anti-oxidation ability, excellent mechanical properties, adaptability for using under pressure, polysulfone was always selected for membrane material. However, hydrophilicity of polysulfone was poor, which could easily result in the membrane fouling from biological suspended solids or macromolecules/colloids deposited on the membrane surface and membrane inner holes. Besides, the application of polysulfone material in other fields is limited as its brittleness and poor flexibility. In this thesis, in order to improve hydrophilicity and flexibility of polysulfone resin, firstly, the synthesis of hydrophilic isocyanate group ended polyurethane and the hydroxyl ended polysulfone was carried out. Then the copolymerization of the hydroxyl ended polysulfone and the isocyanate group ended polyurethane was carried out. The preparation method, the optimum preparation conditions and influence factors of polysulfone and polyurethane modified polysulfone resin were studied by comparing the viscosity of the products. The structures of polyurethane modified polysulfone resin was characterized with ATR-IR, 1HNMR and GPC. The polyurethane modified polysulfone membrane resin membrane was prepared through L-S phase inversion method. The elongation at break, tensile strength contact angle, the glass transition temperature and other physical properties of modified membrane was tested. The polyurethane modified polysulfone resin ultrafiltration membrane was prepared. The pure water flux and the reject rate of the PPG-10000 of the ultrafiltration membrane were tested through the ultrafiltration cup. The antifouling property was tested by assessing the flux loss of bovine serum albumin in the process of dynamic adsorption. We studied the preparation conditions of polysulfone . Finally, we found that the monomer concentration was 40%, the dosage of toluene was 35 mL, the dewater time was 2 h, condensation reaction temperature was 160℃ and condensation reaction time was 4 h. The best copolymerization temperature of polysulfone and polyurethane copolymerization was 80℃; The best copolymerization time was 6 h; The best copolymerization concentration was 25%. Tg of polyurethane modified polysulfone resin membrane was 188.33℃, which was 2.75℃ higher than the polysulfone. Elongation at break of polyurethane modified polysulfone membrane was 18.62%, 4.38% higher than the polysulfone membrane. The water contact angle of polyurethane modified polysulfone membrane are 21.5°~22.3° lower than polysulfone membrane. The pure water flux of polyurethane modified polysulfone resin ultrafiltration membrane was 4.36 mL•cm-2•h-1 higher than polysulfone membrane and the reject rate was 4% higher than polysulfone membrane. The pollution resistance performance of polyurethane modified polysulfone ultrafiltration membrane was better than polysulfone ultrafiltration membrane. Total pollution reduced by 0.18389, irreversible pollution reduced by 0.12243. When we used the flat ultrafiltration membrane for treating laboratory leather unhairing waste-water, the application performance of the flat ultrafiltration membrane was assessed by comparing the chroma, ash content, sulfide, suspended solids, chemical oxygen demand (COD) between influent and effluent. We found that the reject rate of COD, sulfide, chroma, suspended solids and ash treated by polyurethane modified polysulfone resin ultrafiltration membrane were higher than by polysulfone ultrafiltration membrane. |
回復此樓» 猜你喜歡
【考研調(diào)劑】化學專業(yè) 281分，一志愿四川大學，誠心求調(diào)劑
已經(jīng)有4人回復
-
317求調(diào)劑
已經(jīng)有5人回復
-
0817 化學工程 299分求調(diào)劑 有科研經(jīng)歷 有二區(qū)文章
已經(jīng)有10人回復
-
一志愿 西北大學 ，070300化學學碩，總分287，雙非一本，求調(diào)劑。
已經(jīng)有3人回復
-
一志愿福大288有機化學，求調(diào)劑
已經(jīng)有3人回復
-
085600材料與化工求調(diào)劑
已經(jīng)有6人回復
-
一志愿西安交通大學材料工程專業(yè) 282分求調(diào)劑
已經(jīng)有6人回復
-
085600材料與化工調(diào)劑 324分
已經(jīng)有10人回復
-
294求調(diào)劑材料與化工專碩
已經(jīng)有11人回復
-
一志愿南昌大學，327分，材料與化工085600
已經(jīng)有3人回復
Paulwolf
榮譽版主 (文壇精英)
非線性控制領域新人一枚
-
專家經(jīng)驗: +178 - 翻譯EPI: 23
- 應助: 317 (大學生)
- 貴賓: 4.423
- 金幣: 310300
- 散金: 17942
- 紅花: 554
- 沙發(fā): 3382
- 帖子: 35712
- 在線: 4027.9小時
- 蟲號: 3131175
- 注冊: 2014-04-12
- 專業(yè): 控制理論與方法
- 管轄: 學術會議
【答案】應助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
愛與雨下: 金幣+1 2014-06-10 19:03:37
supee: 金幣+50, 翻譯EPI+1, ★有幫助, 改得可以 如果重新把全文翻譯一遍就不錯了 謝謝 2014-06-10 19:18:47
愛與雨下: 金幣+1 2014-06-10 19:03:37
supee: 金幣+50, 翻譯EPI+1, ★有幫助, 改得可以 如果重新把全文翻譯一遍就不錯了 謝謝 2014-06-10 19:18:47
|
修改后的文章： 第一段： With the rapid development of economy and the increasing attention people pay on the environment, the separation technology of polysulfone membrane depending on its high efficiency, energy saving, environmental protection, high selectivity and device flexibility, has been widely used in the water treatment of the industrial and agricultural, desalination, biomedical applications and so on. Due to its acid and alkali resistance, anti-oxidation ability, excellent mechanical properties, fitness for using under pressure, polysulfone is always selected as the material of membrane. However, the poor hydrophilicity of polysulfone could easily result in the membrane fouling from biological suspended solids or macromolecules/colloids deposited on the membrane surface and membrane inner holes. Besides, the brittleness and poor flexibility of polysulfone material has limited its application in other fields. |
2樓2014-06-10 18:12:27
Paulwolf
榮譽版主 (文壇精英)
非線性控制領域新人一枚
-
專家經(jīng)驗: +178 - 翻譯EPI: 23
- 應助: 317 (大學生)
- 貴賓: 4.423
- 金幣: 310300
- 散金: 17942
- 紅花: 554
- 沙發(fā): 3382
- 帖子: 35712
- 在線: 4027.9小時
- 蟲號: 3131175
- 注冊: 2014-04-12
- 專業(yè): 控制理論與方法
- 管轄: 學術會議
3樓2014-06-10 19:26:47
supee
木蟲 (正式寫手)
- 應助: 0 (幼兒園)
- 金幣: 2161.7
- 紅花: 4
- 帖子: 387
- 在線: 116.3小時
- 蟲號: 768090
- 注冊: 2009-05-11
- 專業(yè): 化學反應工程
4樓2014-06-10 19:31:42
Paulwolf
榮譽版主 (文壇精英)
非線性控制領域新人一枚
-
專家經(jīng)驗: +178 - 翻譯EPI: 23
- 應助: 317 (大學生)
- 貴賓: 4.423
- 金幣: 310300
- 散金: 17942
- 紅花: 554
- 沙發(fā): 3382
- 帖子: 35712
- 在線: 4027.9小時
- 蟲號: 3131175
- 注冊: 2014-04-12
- 專業(yè): 控制理論與方法
- 管轄: 學術會議
5樓2014-06-10 19:40:07
supee
木蟲 (正式寫手)
- 應助: 0 (幼兒園)
- 金幣: 2161.7
- 紅花: 4
- 帖子: 387
- 在線: 116.3小時
- 蟲號: 768090
- 注冊: 2009-05-11
- 專業(yè): 化學反應工程
6樓2014-06-10 19:56:21
相關版塊跳轉(zhuǎn)
我要訂閱樓主 supee 的主題更新
| 6 | 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] 321求調(diào)劑 +7 | 何潤采123 2026-03-18 | 7/350 |
|
|---|---|---|---|---|
|
|
[考研] 281求調(diào)劑（0805） +9 | 煙汐憶海 2026-03-16 | 19/950 |
|
|
|
[考研] 本科鄭州大學物理學院，一志愿華科070200學碩，346求調(diào)劑 +4 | 我不是一根蔥 2026-03-18 | 4/200 |
|
|
[考研] 一志愿中國海洋大學，生物學，301分，求調(diào)劑 +4 | 1孫悟空 2026-03-17 | 4/200 |
|
|
|
[考研] 材料與化工一志愿南昌大學327求調(diào)劑推薦 +8 | Ncdx123456 2026-03-13 | 9/450 |
|
|
|
[考研] 收復試調(diào)劑生 +4 | 雨后秋荷 2026-03-18 | 4/200 |
|
|
|
[考研] 304求調(diào)劑 +12 | 小熊joy 2026-03-14 | 13/650 |
|
|
|
[考研] 工科材料085601 279求調(diào)劑 +6 | 困于星晨 2026-03-17 | 6/300 |
|
|
|
[考研] 0703化學336分求調(diào)劑 +6 | zbzihdhd 2026-03-15 | 7/350 |
|
|
|
[考研] 268求調(diào)劑 +6 | 簡單點0 2026-03-17 | 6/300 |
|
|
|
[考研] 有沒有道鐵/土木的想調(diào)劑南林，給自己招師弟中～ +3 | TqlXswl 2026-03-16 | 7/350 |
|
|
|
[考研] 070300化學學碩求調(diào)劑 +6 | 太想進步了0608 2026-03-16 | 6/300 |
|
|
|
[考研] 求老師收留調(diào)劑 +4 | jiang姜66 2026-03-14 | 5/250 |
|
|
|
[考研] 22408總分284求調(diào)劑 +3 | InAspic 2026-03-13 | 3/150 |
|
|
|
[考研] 294求調(diào)劑 +3 | Zys010410@ 2026-03-13 | 4/200 |
|
|
|
[考研] 中科大材料與化工319求調(diào)劑 +3 | 孟鑫材料 2026-03-14 | 3/150 |
|
|
|
[考研] 330求調(diào)劑 +3 | ?醬給調(diào)劑跪了 2026-03-13 | 3/150 |
|
|
|
[考研] 材料301分求調(diào)劑 +5 | Liyouyumairs 2026-03-12 | 5/250 |
|
|
|
[考研] 308求調(diào)劑 +3 | 是Lupa啊 2026-03-12 | 3/150 |
|
|
|
[考研] 321求調(diào)劑（食品/專碩） +3 | mxcz321 2026-03-12 | 6/300 |
|