News Details
Self-healing polymer coatings with crosslinking agents
2017-6-29 17:16:50
Self-healing polymer coatings with crosslinking agents
Self-healing concept of polymer produced in the 1980 s, but it was not until 1993 Dry self-healing polymer composites was proposed, then White, published in 2001, a large number of references to the article, to cause the attention of the world of this materials.
Since then, the self-healing concept of organic and inorganic materials has been used in composite materials, plastics, concrete, adhesives and artificial skin. However, so far, the self-repair mechanism of damaged coatings has not been realized repeatedly and indefinitely.
However, it can be designed and prepared to reduce the damage degree and extend the life of coating. Two main methods can be used to prepare self-healing coatings: one is self-healing through polymer flow, arrangement, rearrangement and bond generation/fracture. The other is to achieve self-repair through responsive auxiliaries.
Both methods require specific triggering mechanisms. In 2002, through the diels - alder reaction, realize the polymer chains (with furan and Thomas to imide functional groups) of cycloaddition, reversible crosslinked composites in heating method is proposed.
Recently, there have also been examples of the use of epoxy compounds for thermal repair of composite materials. Esteves and others developed a polyurethane polyester, which USES the difference of energy as the original power to repair surface damage.
Sijbesma et al. studied the formation of non-covalent bonds, in which the supermolecule networks based on quad-heavy hydrogen bonds and hemiureyrimidine would respond to local stresses, rearrange and repair surface injuries. In some coating formulations, capsules with various restorative agents can also be added.
When triggered, the material can release the repair agent, react with the composition of the paint, the water or the gas in the entrainment, or cross the link, thereby achieving the purpose of repairing the damage. Baghdachi et al. developed and discussed the formulation and performance of self-repairing polyurethane coatings, which can be triggered by climatic factors such as high humidity, heat and ambient light.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
The unique performance of functional coating (whether the surface function or the overall function) is mainly derived from the following three kinds of materials: specially designed responsive polymers; Responsive auxiliaries, diluents or solvents; Responsive pigment. Material selection is usually one of the most important processes in the process of coating preparation.
The coating can kill or inhibit bacterial growth through the following three mechanisms: (1) coating resists the attachment of bacteria; (2) coating can release fungicide to kill bacteria; (3) the bacteria that can kill the contact coating. A coating can also have two or more antibacterial mechanisms.
To inhibit bacterial attachment, coating surfaces must be hydrophobic. For this reason, the coating should contain fluoropolymer and organosilicon compounds with extremely low surface energy, so that the surface of the coating will not have the accumulation of liquid water, so that no bacteria can reproduce. A variety of fungicides and anti-mildew agents can also be used in the paint formulation, such as small molecule antibiotics, season salt, chloramine or triazine.
However, if the compound cannot be grafted on the main chain of the main resin, it will leak out over time, which will greatly shorten the life of the coating. Polymeric fungicides contain active functional groups (such as quantamine), various quinolone carboxylic acid derivatives (such as norfloxacin) or halogen compounds.
These polymers can be classified as "fungicide release type" or "non-contact sterilization". The release fungicide has been sold. In the meantime, inorganic compounds (such as zinc oxide, titanium dioxide and silver compound) can be dispersed in ordinary polymer, and the "contact sterilization" function of antimicrobial coating can be achieved.
Ultra hydrophobic, self-cleaning, easy to clean and anti-icing paint. Generally speaking, the superhydrophobic surface can be achieved by two completely different methods: the method of texture structure or formulation of the low surface energy materials. Texture structures can be either nanostructures, micron structures or layered structures.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Self-healing concept of polymer produced in the 1980 s, but it was not until 1993 Dry self-healing polymer composites was proposed, then White, published in 2001, a large number of references to the article, to cause the attention of the world of this materials.
Since then, the self-healing concept of organic and inorganic materials has been used in composite materials, plastics, concrete, adhesives and artificial skin. However, so far, the self-repair mechanism of damaged coatings has not been realized repeatedly and indefinitely.
However, it can be designed and prepared to reduce the damage degree and extend the life of coating. Two main methods can be used to prepare self-healing coatings: one is self-healing through polymer flow, arrangement, rearrangement and bond generation/fracture. The other is to achieve self-repair through responsive auxiliaries.
Both methods require specific triggering mechanisms. In 2002, through the diels - alder reaction, realize the polymer chains (with furan and Thomas to imide functional groups) of cycloaddition, reversible crosslinked composites in heating method is proposed.
Recently, there have also been examples of the use of epoxy compounds for thermal repair of composite materials. Esteves and others developed a polyurethane polyester, which USES the difference of energy as the original power to repair surface damage.
Sijbesma et al. studied the formation of non-covalent bonds, in which the supermolecule networks based on quad-heavy hydrogen bonds and hemiureyrimidine would respond to local stresses, rearrange and repair surface injuries. In some coating formulations, capsules with various restorative agents can also be added.
When triggered, the material can release the repair agent, react with the composition of the paint, the water or the gas in the entrainment, or cross the link, thereby achieving the purpose of repairing the damage. Baghdachi et al. developed and discussed the formulation and performance of self-repairing polyurethane coatings, which can be triggered by climatic factors such as high humidity, heat and ambient light.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
The unique performance of functional coating (whether the surface function or the overall function) is mainly derived from the following three kinds of materials: specially designed responsive polymers; Responsive auxiliaries, diluents or solvents; Responsive pigment. Material selection is usually one of the most important processes in the process of coating preparation.
The coating can kill or inhibit bacterial growth through the following three mechanisms: (1) coating resists the attachment of bacteria; (2) coating can release fungicide to kill bacteria; (3) the bacteria that can kill the contact coating. A coating can also have two or more antibacterial mechanisms.
To inhibit bacterial attachment, coating surfaces must be hydrophobic. For this reason, the coating should contain fluoropolymer and organosilicon compounds with extremely low surface energy, so that the surface of the coating will not have the accumulation of liquid water, so that no bacteria can reproduce. A variety of fungicides and anti-mildew agents can also be used in the paint formulation, such as small molecule antibiotics, season salt, chloramine or triazine.
However, if the compound cannot be grafted on the main chain of the main resin, it will leak out over time, which will greatly shorten the life of the coating. Polymeric fungicides contain active functional groups (such as quantamine), various quinolone carboxylic acid derivatives (such as norfloxacin) or halogen compounds.
These polymers can be classified as "fungicide release type" or "non-contact sterilization". The release fungicide has been sold. In the meantime, inorganic compounds (such as zinc oxide, titanium dioxide and silver compound) can be dispersed in ordinary polymer, and the "contact sterilization" function of antimicrobial coating can be achieved.
Ultra hydrophobic, self-cleaning, easy to clean and anti-icing paint. Generally speaking, the superhydrophobic surface can be achieved by two completely different methods: the method of texture structure or formulation of the low surface energy materials. Texture structures can be either nanostructures, micron structures or layered structures.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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