Abstract: Autonomous detection of damage in a polymer coating is described by utilizing microcapsules in a polymer coating having free and/or residual amines. The microcapsules contain a color indicator, such as 2?,7?-dichlorofluorescein (DCF), bromophenol blue (BPB) or fluorescamine, which is reactive with the free and/or residual amines present in the polymer coating. For coatings without the presence of free and/or residual amines, a color indicator microcapsule can be combined with a second type of microcapsule filled with a base. When sufficient damage is inflicted to the coating, the microcapsules in and/or around an area of the damage will rupture, and the color indicator will react with the free and/or residual amines or the base to autonomically indicate the area in which the coating has been damaged.

Abstract: Autonomous detection of damage in a polymer coating is described by utilizing microcapsules in a polymer coating having free and/or residual amines. The microcapsules contain a color indicator, such as 2?,7?-dichlorofluorescein (DCF), bromophenol blue (BPB) or fluorescamine, which is reactive with the free and/or residual amines present in the polymer coating. For coatings without the presence of free and/or residual amines, a color indicator microcapsule can be combined with a second type of microcapsule filled with a base. When sufficient damage is inflicted to the coating, the microcapsules in and/or around an area of the damage will rupture, and the color indicator will react with the free and/or residual amines or the base to autonomically indicate the area in which the coating has been damaged.

Abstract: Autonomous detection of damage in a polymer coating is described by utilizing microcapsules in a polymer coating having free and/or residual amines. The microcapsules contain a color indicator, such as 2?,7?-dichlorofluorescein (DCF), bromophenol blue (BPB) or fluorescamine, which is reactive with the free and/or residual amines present in the polymer coating. For coatings without the presence of free and/or residual amines, a color indicator microcapsule can be combined with a second type of microcapsule filled with a base. When sufficient damage is inflicted to the coating, the microcapsules in and/or around an area of the damage will rupture, and the color indicator will react with the free and/or residual amines or the base to autonomically indicate the area in which the coating has been damaged.

Abstract: An autonomic self-indicating material is provided, the material comprising a polymer composition or a composite material embedded with a microcapsule or a vascular structure comprising an aggregation-induced emission (AIE) luminogen. Upon mechanical damage to the material, the luminogen is released and aggregates, leading to fluorescence.

Abstract: An autonomic self-indicating material is provided, the material comprising a polymer composition or a composite material embedded with a microcapsule or a vascular structure comprising an aggregation-induced emission (AIE) luminogen. Upon mechanical damage to the material, the luminogen is released and aggregates, leading to fluorescence.

Abstract: Autonomous detection of damage in a polymer coating is described by utilizing microcapsules in a polymer coating having free and/or residual amines. The microcapsules contain a color indicator, such as 2?,7?-dichlorofluorescein (DCF), bromophenol blue (BPB) or fluorescamine, which is reactive with the free and/or residual amines present in the polymer coating. For coatings without the presence of free and/or residual amines, a color indicator microcapsule can be combined with a second type of microcapsule filled with a base. When sufficient damage is inflicted to the coating, the microcapsules in and/or around an area of the damage will rupture, and the color indicator will react with the free and/or residual amines or the base to autonomically indicate the area in which the coating has been damaged.

Abstract: The present invention relates to a method for producing lubricating base oil with a low cloud point and a high viscosity index. In the method, a lubricating base oil with a low pour point, a low cloud point and a high viscosity index is produced by a hydrorefining-isomerization/asymmetrical cracking-hydrofinishing in the presence of hydrogen, wherein a highly waxy heavy fraction oil having an initial boiling point of 300° C. to 460° C., a wax content of 5% or more, a pour point of ?20° C. or more and a cloud point of ?5° C. or more is used as a raw material, and naphtha and middle fraction oil being co-produced. The method is characterized mainly in the high yield of heavy base oil, a low pour point and cloud point, a high viscosity and viscosity index of the base oil.