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Fluorescent nano particle with AIE characteristic, bionic nano composite hydrogel actuator, preparation method and application

A composite hydrogel, fluorescent nanotechnology, applied in the field of fluorescent nanocomposite materials, can solve the problems of low contrast between nanoparticles and polymer matrix, difficult to achieve dynamic real-time detection, low conductivity, etc., to avoid complex sample processing, TICT Significant effect, significant color change effect

Active Publication Date: 2022-08-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: the hydrogel is difficult to characterize due to its wettability, low conductivity, and low contrast between nanoparticles and polymer matrix. It is difficult to realize technical problems such as dynamic real-time detection

Method used

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  • Fluorescent nano particle with AIE characteristic, bionic nano composite hydrogel actuator, preparation method and application
  • Fluorescent nano particle with AIE characteristic, bionic nano composite hydrogel actuator, preparation method and application
  • Fluorescent nano particle with AIE characteristic, bionic nano composite hydrogel actuator, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 Design and synthesis of fluorescent nanoparticle TPE-CNC

[0050] The TPE-pyo fluorescent molecules were grafted onto CNCs through click reactions to synthesize fluorescent nano-TPE-CNCs, such as figure 1 As shown in a, it specifically includes the following steps:

[0051] (1) Preparation of solution: dissolve 10-30mg TPE-pyo fluorescent molecule (alkyne-TPE) in 10-30mL CH 2 Cl 2 In the solvent, 0.1-0.4g cellulose nanocrystals (Cellulose Nanocrystal, CNC) were dispersed in 10-90mL CH 2 Cl 2 medium, sonicate for 10-40min, dissolve DMAP (4-dimethylaminopyridine) in CH 2 Cl 2 A solution of 20 mg / mL was obtained in , wherein the TPE-pyo fluorescent molecule and the CNC chemical structural formula are as follows:

[0052]

[0053] (2) Mix the prepared 0.5-4 mL DMAP solution with the TPE-pyo solution, dropwise into the CNC suspension while stirring, and stir for 12 h at room temperature to fully react;

[0054] (3) after the reaction finishes, the obtaine...

Embodiment 2

[0056] Example 2 Preparation of biomimetic nanocomposite hydrogel actuators

[0057] The TPE-CNC fluorescent nanoparticles were introduced into the composite hydrogel system to prepare a biomimetic nanocomposite hydrogel actuator (TPE-CNC nanocomposite hydrogel fiber), including:

[0058] Disperse 0.02-0.06g TPE-CNC into 2mL H 2 O, sonicate for 3min, add 0.1-0.3g N-isopropylacrylamide (NIPAM), 0.001-0.004g N,N'-methylenebisacrylamide (Bis), 10-40μL polyethylene glycol monoethyl ether Methacrylate (PEGMEMA), 2-6 μL of photoinitiator DEAP, stirred at room temperature in the dark for 10-60 min. The above solution is poured into the fiber mold, and the polymerization is initiated by ultraviolet light for 10-60 min to obtain the TPE-CNC nanocomposite hydrogel fiber. in, image 3 It is shown that during the preparation process, the fluorescence color and luminescence intensity of TPE-CNC are changed in different microenvironments. The fluorescent color of CNC gradually changed f...

Embodiment 3

[0059] Example 3 Tracking the dynamic motion and static distribution process of fluorescent nanoparticles in the hydrogel preparation process:

[0060] The TPE-CNC hydrogel precursor dispersion was continuously scanned by a fluorescence spectrometer ( Figure 4 ), the excitation wavelength was set to 350-400 nm, the scanning range was 400-800 nm, and the slit was set to 1 nm. The cuvettes used were 750 μL microcuvettes with an optical path length of 2 mm. In order to ensure uniformity, the samples were fully mixed before the test. The test was carried out at room temperature, and the fluorescence spectrometer and the sample were not disturbed. The test time is more than 400min. As time goes by, the fluorescence intensity of the sample first increases and then decreases, because the fluorescent nanoparticle TPE-CNC first aggregates between particles in the hydrogel dispersion system, and then continuously settles under the action of gravity. At the same time, due to the combin...

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Abstract

The invention discloses a fluorescent nano particle with AIE characteristics, a bionic nano composite hydrogel actuator, a preparation method and application. The invention provides fluorescent nanoparticles with aggregation-induced emission (AIE) characteristics. The fluorescent nanoparticles are prepared from TPE-pyo fluorescent molecules and cellulose nanocrystals under the action of a catalyst. On the basis of a conjugated donor-acceptor (D-A) structure of the fluorescent nanoparticles, the change of a microenvironment can be sensitively sensed, so that the dynamic movement of the fluorescent nanoparticles in the hydrogel forming process is tracked; the static distribution of the fluorescent nanoparticles in the hydrogel is visualized; and monitoring the bending movement process and the phase transformation behavior of the nano composite hydrogel under thermal stimulation. The fluorescent nanoparticles with AIE characteristics and the related application method thereof are expected to promote the application of the fluorescence technology in the fields of artificial muscles, intelligent actuation and bionic nanocomposite materials.

Description

technical field [0001] The invention relates to a fluorescent nanoparticle with AIE characteristics, a biomimetic nanocomposite hydrogel actuator, a preparation method and an application, and belongs to the technical field of fluorescent nanocomposite materials. Background technique [0002] A hydrogel actuator is a new type of smart material that can reversibly deform or change its volume in response to external stimuli (light, heat, chemistry, electricity, etc.). As a class of "soft and wet" materials similar to biological tissues, hydrogel actuators have great potential applications in the fields of soft robotics, artificial muscles, and tissue engineering. Adding nanoparticles to hydrogel systems to induce asymmetric network structures is an effective method. [0003] In order to realize the construction of asymmetric hydrogel networks, it is crucial to precisely control the distribution of nanoparticles in the polymer matrix. However, traditional testing methods such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B15/00C09K11/06C08J3/075C08L51/02C08F251/02C08F220/54C08F222/38C08F220/28C08F2/48G01N21/64
CPCC08B15/00C09K11/06C08J3/075C08F251/02C08F2/48G01N21/6428C09K2211/1425C09K2211/145C08J2351/02C08F220/54C08F222/385C08F220/286Y02B20/00
Inventor 成艳华于晓晓朱美芳陈林峰张君妍高孟月徐成建
Owner DONGHUA UNIV
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