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Modified organic polysilazane based on long-chain alkyl compound modification, preparation method and application thereof

A long-chain alkyl, polysilazane technology, applied in the direction of coating, can solve the problems of poor bonding force and poor durability, and achieve the effects of low cost, good scalability and strong designability

Active Publication Date: 2021-07-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to aim at the common problems of poor binding force between low surface energy substances and substrates, and poor durability of constructed hydrophobic and superhydrophobic surfaces or coatings, aiming to provide a long-chain alkyl compound based Modified modified organopolysilazane and preparation method thereof; the prepared modified organopolysilazane retains the excellent anchoring properties of organopolysilazane to various substrates and the low surface energy of long-chain alkyl compounds properties or other functional properties, a stable and durable functional coating can be prepared on the surface of a variety of substrates using a simple and versatile coating technology

Method used

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  • Modified organic polysilazane based on long-chain alkyl compound modification, preparation method and application thereof
  • Modified organic polysilazane based on long-chain alkyl compound modification, preparation method and application thereof
  • Modified organic polysilazane based on long-chain alkyl compound modification, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Example 1 Preparation of modified organopolysilazane based on long-chain alkyl compound modification

[0068] (1) Synthesis of long-chain alkyl compounds: under the protection of argon, 0.665g of n-hexadecyl alcohol (CA) and 0.500g of hexamethylene diisocyanate (HDI) were added to 10ml of tetrahydrofuran solvent, and mixed uniformly; Then, add triethylamine accounting for 0.10wt% of the total mass of reactant monomers, and react for 5 hours at a temperature of 50°C to obtain a long-chain alkyl compound solution. The product is denoted as CA-HDI, and its chemical structure is as follows shown.

[0069]

[0070] (2) Preparation of modified organopolysilazane based on long-chain alkyl compound modification: under argon protection, 11.65g of organopolysilazane OPSZ was added to the CA-HDI solution prepared in step (1) , stirring evenly; at a temperature of 25° C., after 7 hours of reaction, the solvent in the reaction system was removed to obtain a modified organopolysi...

Embodiment 2

[0078] Example 2 Preparation of modified organopolysilazane based on long-chain alkyl compound modification

[0079] (1) Synthesis of long-chain alkyl compounds: under argon protection, 1.110g of n-dodecyl alcohol (DA) and 1.000g of hexamethylene diisocyanate (HDI) were added to 15ml of tetrahydrofuran solvent, and mixed uniformly; Then, add 0.05wt% dibutyltin dilaurate accounting for the total mass of reactant monomers, and react for 5.5 hours at a temperature of 55°C to obtain a long-chain alkyl compound solution, and the product is marked as DA-HDI.

[0080] (2) Preparation of modified organopolysilazane based on long-chain alkyl compound modification: under the protection of argon, 25.32g of organopolysilazane was added to the DA-HDI solution obtained in step (1), and stirred Uniform; after reacting for 3.5 hours at a temperature of 45°C, remove the solvent in the reaction system to obtain the modified organopolysilazane M-OPSZ modified with long-chain alkyl compounds. In...

Embodiment 3

[0083] Example 3 Preparation of modified organopolysilazane based on long-chain alkyl compound modification

[0084] (1) Synthesis of long-chain alkyl compounds: under nitrogen protection, 1.381g of 7-phenyl-1-heptanol (PHA) and 1.500g of trimethylhexamethylene diisocyanate (TDMI) were added to 20ml of dioxane In the solvent, mix evenly; Then, add tetramethylbutylene diamine accounting for 0.03wt% of the total mass of reactant monomers, and react for 5.0 hours at a temperature of 60°C to obtain a long-chain alkyl compound solution. The product is described as for PHA-TDMI.

[0085] (2) Preparation of modified organopolysilazane based on long-chain alkyl compound modification: under nitrogen protection, 23.50 g of organopolysilazane was added to the PHA-TDMI solution obtained in step (1), and stirred evenly ; After reacting for 5.0 hours at a temperature of 35°C, remove the solvent in the reaction system to obtain the modified organopolysilazane M-OPSZ modified with long-chain...

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Abstract

The invention discloses modified organic polysilazane based on long-chain alkyl compound modification, a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing an alcohol monomer and a diisocyanate monomer under the protection of inert gas, adding a catalyst, and reacting at 30-90 DEG C for 2-12 hours to obtain a long-chain alkyl compound containing 2-50 carbons; and uniformly mixing the synthesized modified substance long-chain alkyl compound with the organic polysilazane, and reacting at a temperature of 20-60 DEG C for 1-8 hours to obtain the organic polysilazane modified by the long-chain alkyl compound. The modified organic polysilazane prepared by the invention not only has lower surface energy, but also retains the excellent anchoring characteristic of polysilazane, and can be firmly adhered to different types of substrates, thereby greatly simplifying the process for constructing an easy-to-clean coating. The modified organic polysilazane coating and the modified organic polysilazane / micro-nano material composite coating prepared by the invention have good hydrophobic performance, easy cleaning performance, chemical resistance, wear resistance and weather resistance, and show excellent durability.

Description

technical field [0001] The invention relates to a modified polysilazane, in particular to a modified organopolysilazane based on a long-chain alkyl compound modification and its preparation method and application; it belongs to the technical field of surface modification and coating preparation. Background technique [0002] Polysilazane is a polymer composed of Si atoms and N atoms connected alternately by covalent bonds to form a basic skeleton. The general formula is: Among them, n is the degree of polymerization, R 1 , R 2 and R 3 All are side chain substituents, generally hydrogen atoms, methyl groups or other organic groups. According to R 1 , R 2 and R 3 With different groups, polysilazanes have different macromolecular structures and performance characteristics. Polysilazanes are mainly divided into two categories: if all the side chain substituents are hydrogen atoms, they are perhydropolysilazanes, also known as inorganic polysilazanes (PHPS); if some or al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/62C09D183/16
CPCC08G77/62C09D183/16
Inventor 李光吉罗南辉朱晨静熊博宋鑫晏
Owner SOUTH CHINA UNIV OF TECH
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