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A kind of polymer blend compatibilized by silane carbon quantum dots and its preparation method and application

A silane carbon quantum and polymer technology, which is applied in the field of polymer blends and preparations compatibilized by silane carbon quantum dots. finely structured effects

Active Publication Date: 2021-07-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The compatibilizers used in the preparation of the above-mentioned blend materials are all reactive compatibilizers. Due to the inherent flexibility of the copolymer, these compatibilizers are easy to detach from the interface to form micelles during the strong shear reaction of the material, resulting in Reduction of Compatibility Efficiency

Method used

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  • A kind of polymer blend compatibilized by silane carbon quantum dots and its preparation method and application
  • A kind of polymer blend compatibilized by silane carbon quantum dots and its preparation method and application
  • A kind of polymer blend compatibilized by silane carbon quantum dots and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a method for preparing silane carbon quantum dots, including:

[0039] Weigh citric acid solid powder and silane KH792 according to the dosage in Table 1 into a 100ml polytetrafluoroethylene-lined stainless steel reactor. After tightening the reactor, put it into an electric oven and react at 180° for 6 hours. After the reaction kettle was naturally cooled to room temperature, a bright brown liquid was obtained. Utilize sherwood oil to be extraction liquid, in separating funnel, gained liquid is extracted three times, obtain final carbon point (such as figure 1 shown).

[0040] The dosage ratio of table 1 citric acid and silane KH792

[0041]

[0042]

[0043] The particle size of each carbon quantum dot obtained in this embodiment is 2nm.

Embodiment 2

[0045] This embodiment provides a method for preparing silane carbon quantum dots, including:

[0046] Weigh 0.5g of citric acid solid powder and add it to 10ml of DMF solution, stir until it is fully dissolved, then mix the above solution with 10ml of silane KH792 and add it to a 100ml Teflon-lined stainless steel reactor. After tightening, put it into an electric heating oven and react at 180° for 6h. After the reaction kettle was naturally cooled to room temperature, a bright brown liquid was obtained. Using petroleum ether as the extraction liquid, the resulting liquid was extracted three times in a separating funnel to obtain the final carbon dots (silane carbon quantum dots V).

[0047] The carbon quantum dots prepared in this example have a size of 5 nm.

Embodiment 3

[0049] The present embodiment provides a kind of preparation method of polymer copolymer, comprising:

[0050] The basic composition and mass parts of raw materials are as follows:

[0051]

[0052] Specific steps are as follows:

[0053] First, mix methyl vinyl silicone rubber with silane carbon quantum dot II to obtain a composite material; then mix polypropylene and silicone rubber / carbon quantum dot composite material at 170°C to 260°C, and add an antioxidant in proportion, After uniform mixing, the material is cooled to room temperature to obtain a carbon dot compatibilized polypropylene / silicone rubber blend.

[0054] The blended polymer prepared in this example was characterized by scanning electron microscopy of the brittle fracture surface to observe the effect of carbon quantum dots on the compatibility of silicone rubber and polyurethane. as table 2 and figure 2 shown.

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Abstract

The invention belongs to the field of polymer material processing, and in particular relates to a polymer blend compatibilized by silane carbon quantum dots, a preparation method and an application. The polymer blend compatibilized by the silane carbon quantum dots is prepared by mixing raw materials including silicone rubber, plastics, silane carbon quantum dots and antioxidants; wherein, the surface of the silane carbon quantum dots has a long chain The functional group of the silane coupling agent; the plastic is polypropylene or polyurethane. The present invention proposes for the first time that silane carbon quantum dots are used as a compatibilizer for blended materials, and the molecular chains of its silane coupling agent are entangled with the molecular chains of silicone rubber, thereby playing a role of physical compatibility, which can significantly reduce the amount of polymer blends. The particle size of the medium rubber phase can improve the mechanical properties of the blend, which has certain practicability.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to a polymer blend compatibilized by silane carbon quantum dots, a preparation method and an application. Background technique [0002] The main chain of silicone rubber is composed of silicon atoms and oxygen atoms alternately, and there are usually two organic groups attached to the silicon atoms. The salient features of silicone rubber are good biocompatibility, biostability, high temperature resistance and oxygen stability. However, the mechanical strength of silicone rubber is poor, and it has only moderate oil resistance and solvent resistance. [0003] Polypropylene has good bending fatigue resistance, heat resistance, chemical resistance, and is easy to process. Polyurethane thermoplastic elastomer has good oil resistance, aging resistance and biocompatibility. Therefore, blending silicone rubber / polypropylene or silicone rubber / polyurethane can comb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L53/00C08L23/14C08L75/06C08L75/08C08K9/06C08K3/04C08K5/134
CPCC08L83/04C08L2205/08C08L53/00C08L23/14C08L75/06C08L75/08C08K9/06C08K3/04C08K5/1345
Inventor 岳冬梅姚乃群王瀚彬田明张立群
Owner BEIJING UNIV OF CHEM TECH
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