A method for the construction of intelligent reversible self-assembled structures based on core-shell phase-change cellulose nanocrystals under solid-state conditions

A nanocrystalline and cellulose technology, applied in the field of self-assembly of nanomaterials, to achieve excellent self-healing and thermal reversible properties

Active Publication Date: 2021-07-09
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the problem that nanoparticles can only reversibly self-assemble under liquid phase conditions, and provides a method for constructing an intelligent reversible self-assembled structure based on core-shell phase-change cellulose nanocrystals under solid-phase conditions

Method used

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  • A method for the construction of intelligent reversible self-assembled structures based on core-shell phase-change cellulose nanocrystals under solid-state conditions
  • A method for the construction of intelligent reversible self-assembled structures based on core-shell phase-change cellulose nanocrystals under solid-state conditions
  • A method for the construction of intelligent reversible self-assembled structures based on core-shell phase-change cellulose nanocrystals under solid-state conditions

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specific Embodiment approach 1

[0044] Specific Embodiment 1: In this embodiment, a method for constructing an intelligent reversible self-assembled structure based on core-shell phase-change cellulose nanocrystals under solid-state conditions is carried out in the following steps:

[0045] 1. Preparation of cellulose nanocrystals:

[0046] ①. Add microcrystalline cellulose to aqueous hydrochloric acid solution with a concentration of 5mol / L-8mol / L to obtain suspension A. Under the condition of a power of 60W-120W, ultrasonicate the suspension A in an ice-water bath for 10min-20min , and then stand at room temperature for 15h to 20h to obtain the mixture;

[0047] The volume ratio of the quality of the microcrystalline cellulose to the hydrochloric acid aqueous solution whose concentration is 5mol / L~8mol / L is 1g:(30~40)mL;

[0048] ②. Under the conditions of magnetic stirring speed of 200r / min-500r / min and temperature of 90℃-100℃, reflux the mixture for 3h-4h, and then naturally cool to room temperature to ...

specific Embodiment approach 2

[0076] Embodiment 2: This embodiment differs from Embodiment 1 in that the unsaturated fatty acid chloride described in Step 2 ② is an unsaturated fatty acid chloride with an aliphatic carbon chain length of 10-13. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0077] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the long-chain alkyl mercaptan described in step 3 ① is a long-chain alkyl mercaptan with a carbon chain length of 14-22. Others are the same as in the first or second embodiment.

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Abstract

A method for constructing an intelligent reversible self-assembly structure based on core-shell phase-change cellulose nanocrystals under solid-state conditions, which belongs to the field of self-assembly of nanomaterials. The present invention aims to solve the problem that nanoparticles can only reversibly self-assemble under liquid phase conditions. Preparation method: 1. Preparation of cellulose nanocrystals; 2. Preparation of core-shell cellulose nanocrystals containing flexible spacers; 3. Preparation of core-shell cellulose nanocrystals containing flexible spacers and phase-change structural units Preparation; 4. Thermosensitive PC‑FS‑CNC with reversible self-healing smart assembly structure under solid phase conditions S membrane construction. The invention is used for the construction of an intelligent reversible self-assembled structure based on core-shell phase-change cellulose nanocrystals under solid state conditions.

Description

technical field [0001] The invention belongs to the field of self-assembly of nanometer materials. Background technique [0002] Self-assembly is usually a process in which nano- or micro-scale basic units spontaneously form ordered structures, and is widely used in the synthesis of materials in the fields of sensor devices, energy storage, drug delivery, and catalysis. In addition to entropy-driven self-assembly, most chemically assisted self-assembly on the surface of nanoparticles is driven by different intermolecular forces, such as hydrogen bonds, dipole-dipole interactions, etc. These interactions can be tuned by adjusting temperature, interface, solvent, and pH to achieve the desired structure. Therefore, self-assembly by nanoparticles provides a tailored, bottom-up approach for materials design. Although self-assembled materials have achieved significant breakthroughs in these fields, self-assembled materials with reversible multifunctionality are rarely studied. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08B3/14C08B3/10C08L1/10
CPCC08B3/10C08B3/14C08J5/18C08J2301/10
Inventor 王永贵郎真邱泽谢延军肖泽芳王海刚黄薇汤相宇
Owner NORTHEAST FORESTRY UNIVERSITY
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