P(DMC-AM)高分子絮凝剂的制备及絮凝性能  

Preparation and Study of Flocculating Performance of Cationic P(DMC-AM)

作　　者：沈一丁[1] 张宇[1] 

机构地区：[1]陕西科技大学轻化工助剂陕西省重点实验室,陕西咸阳712081

出　　处：《精细化工》2005年第8期607-610,624,共5页Fine Chemicals

基　　金：陕西省自然科学基金资助(2003B02)~~

摘　　要：论述了高相对分子质量阳离子聚(甲基丙烯酰氧乙基三甲基氯化胺-丙烯酰胺)[P(DMC-AM)] 絮凝剂的制备及絮凝性能研究,讨论了多种因素对絮凝效果的影响. 当w(单体)=40%;m(DMC): m(AM)=3: 2;m(引发剂): m(AM)=0.09: 100时,得到的阳离子型P(DMC-AM)高分子絮凝剂对造纸污水及生活废水有明显的絮凝作用.P(DMC-AM)的最佳絮凝条件为:相对分子质量为430～460万,用量为1.1～1.3 mg/L,阳离子度为33%～38%, 废水pH=3～7;在造纸污(废)水体系中,CODCr的去除率可达89%以上,透光率接近100%;采用电子扫描电镜观察絮凝物,结果发现,絮凝后的纤维间可形成多个物理吸附点,交叉网状结构明显,网络编织致密,说明桥联及电中和作用明显,絮凝效果优异.This paper deals with the preparation of cationic P（ DMC -AM） flocculant and its capability of coagulation. Studies were focused on the factors influencing the flocculating peformance. When ω（monomers） =40% ,m（ DMC）：m（AM） =3：2,and m（initiator）：m（AM） =0.09：100,the flocculant P （DMC -AM） obtained had molecular weight = 430×10^4～460×10^4 and cationic degree = 33%～38%. With dosage = 1.1×1.3 mg/L, the CODCr removal efficiency in organic wastewater amounts to 89% ,and the transmittance is nearly 100%. It is superior to other flocculants obviously. The bridgeconnecting action might be the main reason to form hard flocculating system. Also the structure morphology was studied ·by SEM method. The results show that we can find a lot of physical absorption sites ,structure of cross netting is obvious, and the network weaves delicately among the fibers after flocculating. This indicates that actions of bridge uniting and electric neutralization are obvious, and the flocculating performance is excellent.

关 键 词：阳离子絮凝剂 絮凝性能 聚(甲基丙烯酰氧乙基三甲基氯化胺-丙烯酰胺) 反相乳液聚合 

分 类 号：TQ316.334[化学工程—高聚物工业]