基于聚乙烯醇聚合物点制备荧光纳米复合材料

doi:10.6023/A12090690

化学学报 ›› 2012, Vol. 70 ›› Issue (22): 2311-2315.DOI: 10.6023/A12090690 上一篇下一篇

研究论文

基于聚乙烯醇聚合物点制备荧光纳米复合材料

朱守俊, 张俊虎, 宋玉彬, 张国彦, 张皓, 杨柏

吉林大学化学学院超分子结构与材料国家重点实验室长春 130012

投稿日期:2012-09-20 发布日期:2012-10-17
通讯作者: 杨柏 E-mail:byangchem@jlu.edu.cn
基金资助:
项目受国家自然科学基金(Nos. 91123031, 20921003, 50973039, 21074048)资助.

Fluorescent Nanocomposite Based on PVA Polymer Dots

Zhu Shoujun, Zhang Junhu, Song Yubin, Zhang Guoyan, Zhang Hao, Yang Bai

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012

Received:2012-09-20 Published:2012-10-17
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 91123031, 20921003, 50973039, 21074048).

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摘要/Abstract

近年来, 由于聚合物点(PDs)具有良好的荧光性质和光收集能力, 受到了人们广泛的关注, 应用在生物成像和检测等领域. 然而, 目前报道的聚合物点大多数是指共轭聚合物经过组装、固定形成的, 因此聚合物点保持着形成之前的共轭聚合物的相关性质, 且具有更好的稳定性和进一步功能化的能力. 本文中我们研究的聚合物点是指从非共轭线性聚合物为原料而制备的聚合物点, 这类聚合物包括聚环氧乙烯, 多糖等. 聚合物点不仅包含使其具有荧光的碳化中心, 还具有外围的聚合物链结构. 因此, 可以拓展应用聚合物点的聚合物特性. 我们利用PDs的荧光中心和外围的聚合物链双功能性质, 详细研究了基于PDs制备功能性纳米复合材料体系. 首先, 我们原位制备了聚乙烯醇/PDs纳米复合膜材料(PDs是直接通过聚乙烯醇可控碳化而产生的). 复合材料不仅保持了PDs的荧光特性, 还保持了聚乙烯醇易加工的特性, 如可以制备成纳米复合膜材料, PDs含量可以根据需要调控: 0, 20%, 40%, 60%, 80%, 100%. 纳米复合膜材料在不同激发光下具有多颜色发光性质. 进一步的, 我们验证了PDs水溶液可以和很多其他水溶性聚合物, 石墨烯量子点或半导体量子点实现共混, 从而制备双功能性纳米复合材料.

关键词: 荧光聚合物点, 石墨烯量子点, 纳米复合物, 多颜色发光

Currently, fluorescent polymer dots (PDs) draw much attention these years in the fields of bioimaging and sensor due to their high fluorescence efficiency and extraordinary light-gathering capability. However, the present PDs are most conjugated polymer dots derived from conjugated polymer assembly. They preserve the advantages of conjugated polymer dots. Moreover, they are more stable than conjugated polymer and can be further functionalized for practical applications. The PDs in this article are prepared from non-conjugated linear polymer instead of conjugated polymer. Linear polymer is a kind of macromolecules composed of repeating non-conjugated structural units, such as polyethylene glycol (PEG), polysaccharides. These polymers show no fluorescence due to lack of photoluminescent centre. As a result, it is fancy to obtain fluorescent materials from this kind of “simple” polymers. Using carbonization method, photoluminescent polymer dots were prepared by moderately hydrothermal treating polyvinyl alcohol (PVA). PDs contain not only the fluorescent carbon center, but also the connected polymer chains. It’s highly interesting to apply these PDs to polymer based fields using the outstanding properties of polymer chains. In this paper, derived from the fluorescent property and connected polymer chains of PDs, we investigated the functional nanocomposite based on PDs. Firstly, the polyvinyl alcohol (PVA)/PDs nanocomposite films were prepared (PDs was synthesized by carbonization of PVA). The nanocomposite films hold the fluorescent properties of PDs while it’s also facile to be processed like the linear PVA, for example, nanocomposite films were prepared based on PDs, the proportion of PDs and PVA can be tuned as requirement from 0, 20%, 40%, 60%, 80%, 100%. The nanocomposite films have multi-color emission properties using different excitations due to the excitation-dependent behavior of PDs. Furthermore, other nanocomposites based on PDs were investigated such as PDs/water-solubility polymers, PDs/graphene quantum dots (GQDs) and PDs/semiconductor quantum dots. These nanocomposites have di-fluorescence property at the same excitation and could be used at sensor fields.

Key words: fluorescent polymer dots, graphene quantum dots, nanocomposite, multi-color emission

引用此文

朱守俊, 张俊虎, 宋玉彬, 张国彦, 张皓, 杨柏. 基于聚乙烯醇聚合物点制备荧光纳米复合材料[J]. 化学学报, 2012, 70(22): 2311-2315.

Zhu Shoujun, Zhang Junhu, Song Yubin, Zhang Guoyan, Zhang Hao, Yang Bai. Fluorescent Nanocomposite Based on PVA Polymer Dots[J]. Acta Chimica Sinica, 2012, 70(22): 2311-2315.

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基于聚乙烯醇聚合物点制备荧光纳米复合材料

Fluorescent Nanocomposite Based on PVA Polymer Dots

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