国产日产欧美精品-亚洲国产综合久久精品-色综合色国产热无码一-亚洲欧美日本国产,免费观看一区二区三区_在线观看片A免费不卡观看_亚洲а∨天堂久久精品_99久无码中文字幕一本久道

產(chǎn)品展廳收藏該商鋪

您好 登錄 注冊

當前位置:
美國布魯克海文儀器公司>技術(shù)文章>Influence of polyamide membrane surface chemistry on gypsum scaling behavior

技術(shù)文章

Influence of polyamide membrane surface chemistry on gypsum scaling behavior

閱讀:561          發(fā)布時間:2017-3-15
 作者 Devin L. Shaffera, Marissa E. Tousleyb, Menachem Elimelecha

a Department of Chemical & Environmental Engineering, Yale University, New Haven, CT 06520-8286, USA

b Department of Chemical Engineering, Rose-Hulman Institute of Technology, Terre Haute, IN 47803, USA

 

摘要:Mineral scaling of thin-film composite desalination membranes is affected by the surface chemistry and roughness of the membrane polyamide selective layer, but the relative contributions of these surface properties to scaling is unknown. We studied the influence of differences in polyamide surface chemistry on gypsum (calcium sulfate dihydrate) scaling of thin-film composite membranes, independent of surface roughness, with the goal of improving scaling resistance through changes to membrane surface chemistry. Smooth polyamide films and thin-film composite membranes were created using a molecular layer-by-layer deposition technique, and the surface chemistry of the polyamide films was enriched with amine or carboxyl functional groups by varying the final monomer deposition step in the layer-by-layer assembly process. Polyamide films and composite membranes with different surface chemistry were subjected to gypsum scaling by both homogeneous and heterogeneous nucleation mechanisms. Results from quartz crystal microbalance experiments and dynamic membrane scaling tests show that differences in the polyamide surface chemistry do not influence long-term gypsum scaling behavior. We conclude that hydrodynamic conditions have a greater effect than differences in surface chemistry on the gypsum scaling behavior of polyamide thin-film composite membranes.

收藏該商鋪

登錄 后再收藏

提示

您的留言已提交成功!我們將在第一時間回復(fù)您~

對比框

產(chǎn)品對比 產(chǎn)品對比 聯(lián)系電話 二維碼 意見反饋 在線交流

掃一掃訪問手機商鋪
010-62081908
在線留言
阜宁县| 汉川市| 海阳市| 安康市| 沂南县| 马鞍山市| 邳州市| 武功县| 黑山县| 莆田市| 仙游县| 河东区| 凤城市| 祁阳县| 仲巴县| 顺昌县| 肇源县| 万安县| 福贡县| 乃东县| 新平| 忻州市| 宁波市| 军事| 当雄县| 清水河县| 师宗县| 和龙市| 吉木萨尔县| 庄河市| 恩平市| 惠水县| 海安县| 灯塔市| 驻马店市| 三亚市| 黄冈市| 井冈山市| 太仆寺旗| 夏邑县| 蒙山县|