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Dynamic polymer with hybrid cross-linked network

A hybrid cross-linking and polymer technology, applied in the field of smart polymers, can solve problems such as difficult to balance self-healing mechanical properties, weak interactions, and insufficient supramolecular hydrogen bond dynamics

Pending Publication Date: 2020-07-07
厦门逍扬运动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, supramolecular hydrogen bonding is a weak interaction. On the one hand, the dynamics of pure supramolecular hydrogen bonding are insufficient, and on the other hand, better fluidity is often required to achieve self-healing. mechanical properties
Dynamic covalent bond is a kind of covalent bond with dynamic reversibility, which can endow polymer materials with structural stability and excellent thermomechanical properties, and at the same time have the intelligence of recyclability, reprocessing and self-healing under certain conditions property, but because it is a covalent bond, the dynamics are relatively weak

Method used

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  • Dynamic polymer with hybrid cross-linked network
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  • Dynamic polymer with hybrid cross-linked network

Examples

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preparation example Construction

[0214] The preparation method of a kind of dynamic polymer ionic liquid gel of the present invention, comprises the following steps: the raw material of the dynamic polymer that prepares hybrid cross-linked network is added in ionic liquid, makes the dynamic state of prepared hybrid cross-linked network The mass fraction of the polymer is 0.3-75%, the covalent cross-linking is carried out by the appropriate means, and after the reaction is completed, a dynamic polymer ion liquid gel is prepared. Another method for preparing a dynamic polymer ionic liquid gel of the present invention comprises the following steps: swelling a dynamic polymer having a hybrid cross-linked network in a solvent containing an ionic liquid, and making the prepared hybrid cross-linked network The mass fraction of the dynamic polymer is 0.3-75%, and the solvent is removed after fully swelling to prepare a dynamic polymer ion liquid gel. The ionic liquid is generally composed of organic cations and inorg...

Embodiment 1

[0223] The specific steps for preparing an ionic liquid gel are as follows:

[0224] (1) 84g of 1,4-pentadien-3-ol and 57g of methyl isocyanate are reacted in 250ml of methylene chloride with 2g of triethylamine as a catalyst to obtain a bis ene compound 1;

[0225] (2) Diene compound 1 and N,N'-bis(acryloyl)cystamine are added to 1-butyl-3-methyl with respect to 15 to 45 wt% of the side group of the ionic liquid with a carbamate group Imidazolium hexafluorophosphate ([C 4 MIM]PF 6 ) in the ionic liquid, then add the crosslinking agent pentaerythritol tetrakis (3-mercaptopropionate) relative to the monomer 0.1~20wt% and the photoinitiator benzoin dimethyl ether (DMPA) relative to the monomer 0.05~0.55wt% , stir and mix well, pour it into a glass plate mold with a silica gel gasket, put it in an ultraviolet crosslinking instrument for 1 to 10 hours of ultraviolet radiation, and you can get a high elongation and elastic modulus adjustable ion Liquid dynamic polymer gel.

[...

Embodiment 2

[0231] The concrete steps of preparing a kind of foam polyurethane material in the present embodiment are as follows:

[0232] Weigh the reaction material A in parts by weight: 112 parts of polyester diol with a molecular weight of 2000, 0.6 parts of N,N-di(2-hydroxyethyl)-N'-propyl-urine, 4,4'- 0.4 part of dihydroxydiphenyl disulfide, 0.2 part of chain extender, 0.2 part of dibutyltin dilaurate, 1 part of dichloromethane, 0.2 part of diethylenetriamine, 0.1 part of silicone oil, add to No. 1 mold , Stir evenly under the conditions of material temperature 30°C and stirring speed 180r / min; Reaction material B: 12 ​​parts of isophorone diisocyanate (IPDI), 2.5 parts of foaming agent, 0.1 part of foam stabilizer, photoinitiator benzoin Add 0.2 parts of dimethyl ether (DMPA) into No. 2 mold, and stir evenly under the condition of material temperature 30°C and stirring speed 180r / min; The equipment was stirred rapidly until bubbles were generated, and left to stand for 72 hours to...

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Abstract

The invention discloses a dynamic polymer with a hybrid cross-linked network. The dynamic polymer comprises at least one network structure, which comprises dynamic covalent crosslinking and supramolecular hydrogen bond crosslinking; wherein the at least one network comprises dynamic covalent cross-linking, and the dynamic covalent cross-linking reaches above the gel point of the covalent cross-linking in the at least one network; the dynamic covalent cross-linked network skeleton chain comprises at least one of a dynamic disulfide bond and a polysulfide bond; the supramolecular hydrogen bond crosslinking is achieved by polymer chain side groups and / or side hydrogen bond groups on the side chains and optionally covalently crosslinking hydrogen bond groups on the polymer chain backbone. According to the invention, dynamic covalent cross-linking and supramolecular hydrogen bond cross-linking are fused; supramolecular hydrogen bonds endow the polymer material with excellent self-repairability, recoverability, stimuli responsiveness and the like, and dynamic covalent bonds endow the material with excellent mechanical strength and structural stability; the dynamic polymer can be used forpreparing recyclable, stimuli-responsive, self-repairing, biomimetic materials and the like.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a dynamic polymer with a hybrid cross-linked network. Background technique [0002] As we all know, traditional thermosetting polymers have excellent thermomechanical properties and thermo-oxidative stability due to their three-dimensional cross-linked network structure. Deficiencies in performance and flexibility. With the depletion of fossil fuels and the improvement of people's requirements for material performance, the development of recyclable smart materials with good thermomechanical properties is an important direction for future development. [0003] Supramolecular hydrogen bonding is a non-covalent interaction. Due to its dynamic reversibility, it can endow polymer materials with many excellent properties, such as self-healing, stimuli responsiveness, and toughness. Therefore, in recent years, supramolecular The application of hydrogen bonding to the research and d...

Claims

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Application Information

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IPC IPC(8): C08J3/24
CPCC08J3/24C08J3/246
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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