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Preparation method of active supramolecular polymer based on layered double hydroxide bionic confinement driving

A technology of supramolecular polymers and hydroxides, which is applied in the direction of analyzing materials through chemical reactions, and can solve problems such as insufficient activation barriers to control growth kinetics

Active Publication Date: 2021-02-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the activation barrier of aggregates composed of monomers with simple structures is not sufficient to control the subsequent growth kinetics, thus, the preparation of LSPs composed of simple monomers remains a considerable challenge.

Method used

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  • Preparation method of active supramolecular polymer based on layered double hydroxide bionic confinement driving
  • Preparation method of active supramolecular polymer based on layered double hydroxide bionic confinement driving
  • Preparation method of active supramolecular polymer based on layered double hydroxide bionic confinement driving

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Step A: drop NaOH solution (0.500mol / L) into the solution containing 30.0mmol MgCl 2 ·6H 2 O and 10.0 mmol AlCl 3 9H 2 O in saline solution (50.0 mL) until pH ≈ 8.50, all solutions used were freshly prepared from decarbonated distilled water. The slurry was transferred to an autoclave and heated at 110°C for 24 hours, washed three times with decarbonated distilled water, dried in a vacuum oven at 70°C, and then used to obtain an LDH precursor with a size of 50 nm.

[0034]Step B: Use ion exchange to intercalate various small organic molecules into the interlayer of LDH. First prepare the stock solution (pH≈8.00, 12.5mmol / L) of small organic molecules (SG7, BSA, 3-ABSA, 2,5-DABSA, CR and DHNS) with decarbonated distilled water, and take 50mL stock solution respectively, Add 0.313g of LDH precursor powder to it while stirring, raise the temperature to 80°C, and 2 Ion exchanged under atmosphere for 24 hours, washed with carbon dioxide-free distilled water and anhydrou...

Embodiment 2

[0039] Step A: Preparation of LDHs of various sizes (all solutions were prepared with decarbonated distilled water and the LDH product was washed with decarbonated distilled water). 20nm LDH precursor: Add 50.0mL of NaCl solution (1.00mol / L) to a 500mL four-neck flask, add 50.0mL of 3.75mmol MgCl 2 ·6H 2 O and 1.25 mmol AlCl 3 9H 2 The salt solution of O is marked as solution A, and the 50.0mL NaOH solution (1.00mol / L) is marked as solution B, N 2 Add solutions A and B dropwise to the flask under atmosphere and stir vigorously. During the dropping process, maintain the pH of the suspension at ≈8.00. After the addition is complete, put the mixture under N 2 Aging at room temperature in the atmosphere for 24 hours, washing 3 times with distilled water to remove carbon dioxide, drying in a vacuum oven at 70°C and then ready for use; 50nm LDH precursor: see step A of Example 1 for the preparation method; 100nm LDH precursor: 50.0mL of NaCl solution (10.0mol / L) was added to a 5...

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Abstract

The invention discloses a preparation method of an active supramolecular polymer based on layered double hydroxide bionic confinement driving. In the invention, the layered double hydroxide can be used as a nano material for providing a bionic confinement space, and various simple small molecular monomers are assembled into an orderly arranged super-monomer in a confinement manner; after a laminate is removed, the super-monomer can temporarily maintain its form and properties, and can be further assembled into an active supramolecular polymer with controllable length and narrow dispersibilityunder appropriate conditions. Kinetic research shows that the layered double hydroxide overcomes a huge energy barrier, and spontaneous nucleation of a monomer and depolymerization of a metastable active supramolecular polymer can be inhibited. The polymerization degree of the active supramolecular polymer can reach 6000, which exceeds the polymerization degree of all published active supramolecular polymers. The new active polymerization strategy can promote exploration of other multifunctional molecules and promote the rapid development of functional active supramolecular polymers.

Description

Technical field: [0001] The invention belongs to the technical field of active supramolecular polymerization, and in particular relates to a preparation method of an active supramolecular polymer based on layered double hydroxide biomimetic confinement drive. Background technique: [0002] The development of supramolecular polymers provides a broad blueprint for next-generation functional materials such as soft matter materials, drug delivery, and catalysts, especially the active supramolecular polymers (LSPs) with highly efficient controllability and uniform dispersion. The emergence of supramolecular polymers provides a novel preparation route for the preparation of supramolecular polymers and their biological applications. Strictly speaking, a supramolecular polymer can be defined as an LSP only if it is proved that the active end of the supramolecular polymer can be polymerized multiple times through cycling experiments. In 2014, Sugiyasu and Takeuchi's group establishe...

Claims

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Application Information

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IPC IPC(8): C08G83/00G01N21/75
CPCC08G83/008G01N21/75
Inventor 史文颖宗映彤
Owner BEIJING UNIV OF CHEM TECH
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