Microstructure and flocculation properties of hydrophobically associating acrylamide-modified cationic copolymer

ZHONG Chuanrong; HE Wenqiong; LAI Li; LUO Pingya

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Microstructure and flocculation properties of hydrophobically associating acrylamide-modified cationic copolymer

更新时间：2025-12-10

- Microstructure and flocculation properties of hydrophobically associating acrylamide-modified cationic copolymer
- CIESC Journal Issue 8, Pages: 2138-2143(2007)
- 作者机构：
  
  1. 西南石油大学油气藏地质及开发工程国家重点实验室
  2. 成都理工大学材料与化学化工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 August 2007，
  
  Published：05 August 2007
- 稿件说明：
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ZHONG Chuanrong, HE Wenqiong, LAI Li, et al. Microstructure and flocculation properties of hydrophobically associating acrylamide-modified cationic copolymer[J]. CIESC Journal, 2007, (8): 2138-2143.
DOI：

ZHONG Chuanrong, HE Wenqiong, LAI Li, et al. Microstructure and flocculation properties of hydrophobically associating acrylamide-modified cationic copolymer[J]. CIESC Journal, 2007, (8): 2138-2143. DOI：

摘要

用自由基胶束聚合法合成了丙烯酰胺（AM）/丁基苯乙烯（BS）/二甲基二烯丙基氯化铵（DMDAAC）疏水缔合型高分子絮凝剂PBAD。通过UV、FT-IR表征了共聚物的分子结构，AFM研究表明，由于丁苯基疏水基团强的分子间作用，0.005 g.dL-1 PBAD在水溶液中已形成了缔合体，并随着聚合物浓度的增加，缔合结构的尺寸和数量显著增加。在3%硅藻土溶液中，PBAD絮凝的最佳用量为0.005 g.dL-1，此时的透光率为96.5%，污水中的NaCl浓度能明显影响聚合物的架桥吸附作用，Ca2+和Al3+能增强聚合物的絮凝效果。

Abstract

The hydrophobically associating copolymers

poly (BS/AM/DMDAAC)(PBAD) were synthesized from acrylamide (AM)，butyl styrene (BS) and dimethyldiallyammonium chloride (DMDAAC) by the micellar free radical copolymerization technique.The copolymers were characterized with UV and FT-IR.The atomic force microscope(AFM) measurement showed that aggregates had been formed in the aqueous solution of 0.005 g.dl-1 PBAD

and with the increase of PBAD concentration

the number and size of aggregates increased due to the intermolecular hydrophobic association of butylphenyl groups.The optimum flocculant concentration of PBAD was 0.005 g·dl-1 in the aqueous solution of 3% diatomite and the transmittance was 96.5%.The NaCl concentration obviously influenced the bridging and adsorption behavior of the copolymer for celite suspensions

and calcium and aluminium ions strengthened the flocculation effect of the polymer.

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