Aggregation-Induced Emission Polymer via Bacterial Cellulose Biosynthesis
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Solution Overview
Problem
Current AIE polymers have weak fluorescence or no fluorescence, and their synthesis methods are complex, environmentally harmful, and not suitable for large-scale production.
Innovation Solution
Development of an aggregation-induced emission polymer synthesized through a biosynthesis method using bacterial cellulose, incorporating functional groups like triazole and phosphoric acid for enhanced fluorescence and biocompatibility, avoiding the aggregation-caused quenching effect and simplifying the synthesis process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If AIE polymers are synthesized through chemical methods from monomers, then polymerization can be achieved, but the synthesis process becomes complex and environmentally harmful
Solution Approach 1:
The patent replaces chemical synthesis methods with biological synthesis methods using bacteria. Instead of using chemical reagents and complex reaction conditions to polymerize monomers, the invention uses bacterial systems that naturally produce cellulose, substituting chemical processes with biological processes. This simplifies the manufacturing process and reduces environmental harm while maintaining polymer production capability.
Solution Approach 2:
The patent introduces bacteria as an intermediary system between the starting materials and the final AIE polymer product. The bacteria serve as biological factories that take in simple substrates and convert them into the desired polymer through their natural metabolic pathways, avoiding the need for direct chemical polymerization and associated complex procedures.
2Illumination intensity
If traditional fluorescent materials are used, then light emission can be achieved, but aggregation causes fluorescence quenching
Solution Approach 1:
The patent applies the AIE principle where the aggregation of molecules, which traditionally causes fluorescence quenching (harm), is converted into a beneficial effect. By designing polymer structures with specific AIE-active moieties, the invention makes aggregation enhance rather than reduce fluorescence intensity. The bacterial cellulose framework provides a unique environment where aggregated AIE groups maintain or enhance their emissive properties, turning the harmful aggregation effect into a useful feature for improving fluorescence stability and intensity.
3Reliability
If bacterial cellulose is used as base polymer, then biocompatibility is improved, but fluorescence properties are weak or absent
Solution Approach 1:
The patent creates a composite material system combining bacterial cellulose (providing biocompatibility and structural framework) with AIE-active functional groups (providing fluorescence). The cellulose serves as the biocompatible matrix while the incorporated AIE moieties (such as tetraphenylethylene derivatives) provide the desired optical properties. This composite approach allows both requirements - biocompatibility from the natural polymer and fluorescence from the functional groups - to coexist synergistically.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resulting polymer exhibits excellent fluorescence stability, high quantum yield, and biocompatibility, suitable for applications in light-emitting diodes, biological imaging, and chiral separations, with improved solubility and detection capabilities for metal ions and biomolecules.
Implementation Method 1
In 2001, Academician Tang Benzhong et al. discovered that silacyclopentadiene (silole) did not emit light in solution but emitted strong fluorescence in the aggregation state (nanoparticles in poor solvents or thin films in solid state), and defined this phenomenon as aggregation-induced emission (AIE).
Implementation Method 2
AIE molecules overcome the shortcomings of aggregation-caused quenching (ACQ) molecules.
Data Source
AI summary
The present disclosure provides an aggregation-induced emission polymer, a preparation method and application thereof. The aggregation-induced emission polymer provided in the present disclosure has a structure represented by formula I. The aggregation-induced emission polymer provided by the present disclosure has excellent fluorescence stability and biocompatibility; Because there are many benzene rings in the aggregation-induced emission polymer, the fat-solubility of the aggregation-induced emission polymer is increased, thereby changing the problem that cellulose is insoluble and difficult to be processed and modified. In the present disclosure, the aggregation-induced emission small molecule monomer is placed in a basal medium, and the bacterial seed solution is inoculated and then cultured to obtain the aggregation-induced emission polymer. The preparation method provided by the present disclosure has the characteristics of safety, environmental protection and simplicity, solves the shortcomings of complex and cumbersome synthesis process, and is beneficial to the large-scale production of AIE polymers.