可持续高转化率环氧化合物开环聚合的P123-CoMgAl复合材料

IF 2.1 4区 材料科学 Q3 CHEMISTRY, MULTIDISCIPLINARY
Xiaoyan Cao, Xiao Xu, Gongming Wu, Zhenggui Gu
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引用次数: 0

摘要

开环聚合是合成聚丙烯乙二醇的基础。然而,均相碱催化剂通常需要复杂的后处理,阻碍了绿色合成和环境可持续性。本文研究了一种基于P123修饰的纳米复合层状双氧化物(CoMgAl-LDO(P123))的非均相环氧化物聚合方法。随后,通过SEM、XRD、FTIR、XPS、BET、TG-DTG等技术对催化剂的组成、晶体结构、形貌和热稳定性进行了表征。结果表明,CoMgAl-LDO(P123)由于具有可设计和自组装的P123胶束,产生了一致的介孔通道和更大的比表面积。钴的引入使CoMgAl-LDO(P123)表面碱性位点富集。在合成小分子量聚丙二醇(即数平均分子量小于500)时,在最佳反应条件下,CoMgAl-LDO(P123)对环氧丙烷转化的催化性能达到96.3%,优于其他催化剂。我们的战略解决了碱催化剂在可持续性和操作复杂性方面面临的权衡问题,在绿色化学领域前景广阔。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
P123-CoMgAl composite for sustainable and high-conversion epoxide ring-opening polymerization

The ring-opening polymerization lays the foundation for synthesizing polypropylene glycol. Nevertheless, homogeneous alkali catalysts usually require complex post-treatments, hindering green synthesis and environmental sustainability. Here, we studied a heterogeneous epoxide polymerization method based on a P123-modified nanocomposite layered double oxide (CoMgAl-LDO(P123)). Thereafter, the composition, crystal structure, morphology, and thermal stability of the catalyst were characterized through SEM, XRD, FTIR, XPS, BET, and TG-DTG techniques. The results indicated that due to the designable and self-assembled P123 micelles, CoMgAl-LDO(P123) generated consistent mesoporous channels and a larger specific surface area. The introduction of cobalt enriched the alkaline sites on the CoMgAl-LDO(P123) surface. In the synthesis of small molecular weight poly(propylene glycol) (i.e., number average molecular weight less than 500), the catalytic performance of CoMgAl-LDO(P123) for the conversion of propylene oxide reached 96.3% under the optimal reaction conditions, which was superior to that of other catalysts. Our strategy addresses the trade-off issue that alkali catalysts faced in terms of sustainability and operational complexity, holding great promise in green chemistry.

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来源期刊
Journal of Nanoparticle Research
Journal of Nanoparticle Research 工程技术-材料科学:综合
CiteScore
4.40
自引率
4.00%
发文量
198
审稿时长
3.9 months
期刊介绍: The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size. Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology. The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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