需要金幣： 1000 個(gè)金幣 |
資料包括：完整論文 |  |
 |
| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：13349 |  | |
| 折扣與優(yōu)惠：團(tuán)購(gòu)最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要：采用化學(xué)接枝方法對(duì)PP微孔膜表面進(jìn)行親水改性，通過(guò)在膜上引入含親水基團(tuán)的單體使膜表面的接觸角下降，親水性提高，從而提高它的抗污染性。本實(shí)驗(yàn)采用重鉻酸鉀，水，濃硫酸（配比為1∶2∶20）混合溶液預(yù)處理PP膜，使膜表面產(chǎn)生接枝點(diǎn)，再用合適的引發(fā)劑，在一定條件下接枝合適的單體。在控制其他因素的情況下，考察單體濃度，引發(fā)劑濃度，反應(yīng)溫度，反應(yīng)時(shí)間對(duì)膜接枝率的影響。并對(duì)PP基膜和接枝后的膜進(jìn)行紅外光譜，水接觸角等測(cè)試，比較并分析接枝前后PP膜的變化情況。通過(guò)研究可以得出結(jié)論：丙烯酰胺，丙烯酸，甲基丙烯酸甲酯能成功地接枝到PP膜上；單體濃度，引發(fā)劑濃度，溫度，時(shí)間等和膜的接枝率都有一定的對(duì)應(yīng)關(guān)系；接枝后的PP膜和PP基膜相比水接觸角有明顯的下降，親水性得到提高。 關(guān)鍵詞：PP微孔膜；親水改性；丙烯酰胺；接枝率；水接觸角
Abstract：Study the hydrophilic modification of the polypropylene micro-porous membrane by chemical grafting method to make the contact angle of the membrane smaller and the hydrophily better by grafting monomers with hydrophilic groups and to promote the anti-biofouling properties. In this study, potassium dichromate, water concentrated sulfuric acid mixed solution (ratio 1:2:20) pretreatment PP film to produce grafted points on the surface, and use suitable initiator to graft suitable monomer onto the surface of the membrane under certain conditions. Control the other conditions, inspect the influences of monomer concentration, initiator concentration, reaction temperature and reaction time on the membrane grafting degree. After grafting, test the infrared spectroscopy, water contact angles of the membrane, comparing all the results with those of the original membrane. We can draw a conclusion through the research: the acryl amide, acrylic acid, methyl methacylate can be grafted onto the surface of the membrane successfully; There are some relationships between the monomer concentration, the initiator concentration, the reaction temperature, the reaction time and the grafting degree; That grafted polypropylene membrane compared with the original polypropylene membrane, the water contact angle is much smaller, and the hydrophilic is improved. Key words: Polypropylene microporous membrane; Hydrophilic modification; Acrylamide Grafting degree; Water contact angle
|
