Page 127 - 《精细化工》2020年第11期

第 37 卷第 11 期 精 细 化 工 Vol.37, No.11
2020 年 11 月 FINE CHEMICALS Nov. 2020

功能材料
侧链含芘基的聚 N-异丙基丙烯酰胺共聚物

的合成及性能

董秋静 1,2 ，丁 浩 1,2 ，侯玉梅 1,2 ，陈 静 1,2 ，罗春华 1,2*

（1. 阜阳师范大学 化学与材料工程学院，安徽 阜阳 236037；2. 环境污染物降解与监测安徽省重点实
验室，安徽 阜阳 236037）

摘要：N-异丙基丙烯酰胺（NIPAM）和甲基丙烯酸-β-(1-芘丁酰氧基)乙酯（PyBEMA）通过自由基溶液共聚合
1
成了侧链含芘基的聚 N-异丙基丙烯酰胺共聚物，采用 FTIR、UV-Vis、 HNMR 对共聚物进行了表征。考察了投
料比对共聚物收率、组成、相对分子质量及其分布的影响。结果表明，合成的共聚物是一类具有低临界溶解温
度（LCST）温敏性聚合物，随着共聚物中芘基含量的升高，其 LCST 下降；α-环糊精（α-CD）的加入会使共聚
物 LCST 略微升高，而 β-CD 和 γ-CD 的加入会导致 LCST 降低。其中，γ-CD 的加入使 LCST 降低得更显著。共
聚物在水中有轻微的疏水聚集，出现侧链芘基的激基缔合物荧光。室温下，β-CD 的加入能降低共聚物侧链芘基
之间的疏水聚集。随着温度的升高，芘基的荧光强度（I M ）先下降，后突然升高，然后达到稳定并略微下降；
而芘基的激基缔合物的荧光强度（I E ）先出现略微升高，然后基本保持不变，接着缓慢下降。370 nm 处荧光强
度 I 1 与 395 nm 处荧光强度 I 3 的比值（I 1 /I 3 ）随着温度的升高呈下降趋势，在聚合物发生相转变时的温度区间
（28~32 ℃）内迅速降低。
关键词：聚 N-异丙基丙烯酰胺；温敏性；芘；荧光聚合物；环糊精；功能材料
中图分类号：TQ317 文献标识码：A 文章编号：1003-5214 (2020) 11-2273-07

Synthesis and properties of poly(N-isopropylacrylamide)
with side chain of pyrenyl group

1,2
1,2
1,2
1,2
DONG Qiujing , DING Hao , HOU Yumei , CHEN Jing , LUO Chunhua 1,2*
（1. School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, Anhui, China; 2. Anhui
Provincial Key Laboratory for Degradation and Monitoring of the Pollution of the Environment, Fuyang 236037, Anhui, China）
Abstract: A series of poly(N-isopropylacrylamide) copolymers containing pyrenyl group side chain were
synthesized by radical solution copolymerization of N-isopropylacrylamide (NIPAM) and
β-pyrenebutanoyloxyethyl methacrylate (PyBEMA). The copolymers were characterized by FTIR, UV-Vis
1
and HNMR spectra. The effects of feed ratio on the yield, composition, relative molecular mass and its
distribution of copolymers were investigated. The results showed that the synthesized copolymers were a
class of thermosensitive polymers with low critical solution temperature (LCST). LCST decreased with the
increase of pyrenyl content in copolymer. The addition of α-cyclodextrins (α-CD) increased the LCST of
copolymer slight, while those of β-CD and γ-CD decreased the LCST, in which the addition of γ-CD
decreased the LCST significantly. The copolymers exhibited slight hydrophobic aggregation in water and
the fluorescence of side chain pyrene excimer was observed. At room temperature, the addition of β-CD
could reduce the hydrophobic aggregation of pyrene group in the copolymer side chain. With the increase of
temperature, the fluorescence intensity (I M) of pyrenyl first decreased, then suddenly increased,
subsequently, reached a stable and slightly decreased. However, the fluorescence intensity (I E) of pyrenyl

收稿日期：2020-06-13; 定用日期：2020-07-14; DOI: 10.13550/j.jxhg.20200513
基金项目：安徽高校自然科学研究重点项目（KJ2018A0344，KJ2019A0523）；国家级大学生创新训练项目（201910371023）
作者简介：董秋静（1980—），女，副教授，E-mail：dongqj1980@163.com。联系人：罗春华（1979—），男，教授，E-mail：lch197919@
163.com。