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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.
In recent years, polymer dots (PDs) have attracted a great deal of attention due to their good fluorescence properties and light-harvesting ability, and are widely used in bioimaging and detection, etc. However, most of the currently reported polymer dots are conjugated polymers The material is assembled and fixed so that the polymer dots retain the associated properties of the conjugated polymers prior to formation and have better stability and the ability to be further functionalized.The polymer dots we studied in this article refer to Nonconjugated linear polymers are used as starting materials for polymer dots, such polymers include polyethylene oxides, polysaccharides, etc. Polymer dots contain not only the carbonized center that gives them fluorescence but also the peripheral polymer chain structure. Therefore, it is possible to expand the polymer properties of polymer dots.We used the PDs fluorescent center and peripheral polymer chain bi-functional properties, the detailed study of PDs prepared functional nanocomposite system.First, we in situ prepared poly PDs nanocomposite film material (PDs is directly controlled by carbonized carbonized PVA produced) composite materials not only to maintain the fluorescence properties of PDs, but also to maintain the polyethylene Alcohol-processing characteristics such as nanocomposite membrane materials can be prepared, the PDs content can be adjusted according to need: 0,20%, 40%, 60%, 80%, 100% .The nanocomposite membrane material has more under different excitation light Color luminescent properties.Furthermore, we verified that PDs aqueous solution can be blended with many other water-soluble polymers, graphene quantum dots or semiconductor quantum dots to prepare bifunctional nanocomposites.