337P日本大胆欧美裸体艺术_久久久久精品无码专区_一个人看的免费视频WWW中文字幕_欧美熟妇精品视频网免费观看
第 45 卷第 3 期Vol. 45 No. 3
2015 年 6 月Jun 2015

所屬欄目:安全與環(huán)保

聚二甲基二烯丙基氯化銨的合成及其絮凝性能研究
李佼佼,胡瓊璨,張偉鋒,寧靜恒* (長(cháng)沙理工大學(xué) 化學(xué)與生物工程學(xué)院,湖南 長(cháng)沙 410110)
摘 要:以二甲基二烯丙基氯化銨(DMDAAC)單體濃度為65%、硫酸銨(APS)與DMDAAC質(zhì)量比為0.35%、乙二胺四乙酸二鈉與DMDAAC質(zhì)量比為0.0035%三階段升溫制備聚二甲基二烯丙基氯化銨(PDMDAAC)。第一階段反應2 h,第二階段和第三階均反應3 h,并將溫度依次設定為46.0、55.5、67.0℃,得到的PDMDAAC特性粘度可達2.78 dL/g。并用其進(jìn)行混凝實(shí)驗,在投加量為3 mg/L、pH=7、混凝溫度50℃、靜置10 min的條件下,PDMDAAC的透過(guò)率最佳,其與原水樣比值可達到9.5∶1.0,呈現良好的絮凝效果。
關(guān)鍵詞:聚二甲基二烯丙基氯化銨;合成;絮凝
中圖分類(lèi)號:TQ31  文獻標識碼:A  文章編號:1009-9212(2015)03-0070-03
Synthesis and Flocculational Performance of Polydimethyldiallylammonium Chloride
LI Jiao-jiao, HU Qiong-can, ZHANG Wei-feng, NING Jing-heng* (School of Chemistry and Biological Engineering, Changsha University of Science & Technology, Changsha 410110, China)
Abstract:Polydimethyldiallylammonium chloride(PDMDAAC)was prepared by a 3-stage method. This 3-stage method included a first-stage reaction of 2 h at 46.0℃, a second stage reaction of 3 h at 55.5℃, and a third stage reaction of 3 h at 67.0℃. The weight ratio of chemicals in the reaction was as follows: m(APS)∶m(DMDAAC)=0.35%; m(Na2EDTA)∶m(DMDAAC)=0.0035%. The intrinsic viscosity of the obtained typical product (PDMDAAC) could reach 2.78 DL/g. The flocculational performance testing results of PDMDAAC showed a good flocculational performance with a best permeability rate, and the ratio of the permeability rate was obtained in the presence/absence of PDMDAAC was 9.5∶1.0 at a loading of 3 mg/L, a pH of 7, and a temperature of 50℃, standing time of 10 min.
Key words:polydimethyldiallyammonium chloride; synthesis; flocculation
基金項目: 智能活性包裝材料合成及其在水產(chǎn)品保鮮中的應用,湖南省水生資源食品加工工程實(shí)驗室開(kāi)放基金資助(2015GCZX04)。
作者簡(jiǎn)介:李佼佼(1989-),女,吉林白山人,碩士研究生,研究方向:功能材料。
聯(lián) 系 人: 寧靜恒,副教授,研究方向:有機功能材料。
收稿日期: 2015-05-1
337P日本大胆欧美裸体艺术_久久久久精品无码专区_一个人看的免费视频WWW中文字幕_欧美熟妇精品视频网免费观看