The Experts below are selected from a list of 602538 Experts worldwide ranked by ideXlab platform
Mei Liang - One of the best experts on this subject based on the ideXlab platform.
-
high toughness induced by wormlike nanostructure in epoxy thermoset containing amphiphilic pdms pcl block copolymers
Industrial & Engineering Chemistry Research, 2018Co-Authors: Muxuan Li, Zhengguang Heng, Huawei Zou, Yang Chen, Mei LiangAbstract:The modification of epoxy composites through the construction of Nanostructures via self-organization of block copolymers has become a hot topic. In this research, high toughness epoxy thermoset was prepared through constructing wormlike-nanostructure by incorporating amphiphilic polydimethylsiloxane-block-poly(e-caprolactone) block copolymer. The fracture toughness of subsequent epoxy thermosets increased nearly 355% comparing with neat epoxy with the addition of 40 wt % wormlike nanostructure, which was higher than that of thermosets with spherical nanostructure (142%). There was obviously plastic deformation in fractured surfaces of thermosets with wormlike nanostructure, it is believed that a combination of several toughening mechanisms leads to the improvement in fracture toughness. The morphologies transition, dynamic mechanical properties and wetting behavior of the thermoset containing spherical/wormlike Nanostructures are also reported.
-
High Toughness Induced by Wormlike-Nanostructure in Epoxy Thermoset Containing Amphiphilic PDMS–PCL Block Copolymers
Industrial & Engineering Chemistry Research, 2018Co-Authors: Muxuan Li, Zhengguang Heng, Huawei Zou, Yang Chen, Mei LiangAbstract:The modification of epoxy composites through the construction of Nanostructures via self-organization of block copolymers has become a hot topic. In this research, high toughness epoxy thermoset was prepared through constructing wormlike-nanostructure by incorporating amphiphilic polydimethylsiloxane-block-poly(e-caprolactone) block copolymer. The fracture toughness of subsequent epoxy thermosets increased nearly 355% comparing with neat epoxy with the addition of 40 wt % wormlike nanostructure, which was higher than that of thermosets with spherical nanostructure (142%). There was obviously plastic deformation in fractured surfaces of thermosets with wormlike nanostructure, it is believed that a combination of several toughening mechanisms leads to the improvement in fracture toughness. The morphologies transition, dynamic mechanical properties and wetting behavior of the thermoset containing spherical/wormlike Nanostructures are also reported.
Muxuan Li - One of the best experts on this subject based on the ideXlab platform.
-
high toughness induced by wormlike nanostructure in epoxy thermoset containing amphiphilic pdms pcl block copolymers
Industrial & Engineering Chemistry Research, 2018Co-Authors: Muxuan Li, Zhengguang Heng, Huawei Zou, Yang Chen, Mei LiangAbstract:The modification of epoxy composites through the construction of Nanostructures via self-organization of block copolymers has become a hot topic. In this research, high toughness epoxy thermoset was prepared through constructing wormlike-nanostructure by incorporating amphiphilic polydimethylsiloxane-block-poly(e-caprolactone) block copolymer. The fracture toughness of subsequent epoxy thermosets increased nearly 355% comparing with neat epoxy with the addition of 40 wt % wormlike nanostructure, which was higher than that of thermosets with spherical nanostructure (142%). There was obviously plastic deformation in fractured surfaces of thermosets with wormlike nanostructure, it is believed that a combination of several toughening mechanisms leads to the improvement in fracture toughness. The morphologies transition, dynamic mechanical properties and wetting behavior of the thermoset containing spherical/wormlike Nanostructures are also reported.
-
High Toughness Induced by Wormlike-Nanostructure in Epoxy Thermoset Containing Amphiphilic PDMS–PCL Block Copolymers
Industrial & Engineering Chemistry Research, 2018Co-Authors: Muxuan Li, Zhengguang Heng, Huawei Zou, Yang Chen, Mei LiangAbstract:The modification of epoxy composites through the construction of Nanostructures via self-organization of block copolymers has become a hot topic. In this research, high toughness epoxy thermoset was prepared through constructing wormlike-nanostructure by incorporating amphiphilic polydimethylsiloxane-block-poly(e-caprolactone) block copolymer. The fracture toughness of subsequent epoxy thermosets increased nearly 355% comparing with neat epoxy with the addition of 40 wt % wormlike nanostructure, which was higher than that of thermosets with spherical nanostructure (142%). There was obviously plastic deformation in fractured surfaces of thermosets with wormlike nanostructure, it is believed that a combination of several toughening mechanisms leads to the improvement in fracture toughness. The morphologies transition, dynamic mechanical properties and wetting behavior of the thermoset containing spherical/wormlike Nanostructures are also reported.
Myoung-woon Moon - One of the best experts on this subject based on the ideXlab platform.
-
Adhesion behavior of mouse liver cancer cells on nanostructured superhydrophobic and superhydrophilic surfaces
Soft Matter, 2013Co-Authors: Tae-jun Ko, So Nagashima, Kyu-hwan Oh, Myoung-woon MoonAbstract:The control of cancer cell adhesion behavior on certain surfaces has been widely studied in recent years to enhance cell adhesion, which is required for bio-sensing, implant biomaterials, or to prevent infections from bacteria or germs. In addition, it helps to preserve the original functions of medical devices such as implants, catheters, injection syringes, and vascular stents. In this study, we explored the behavior of mouse liver cancer cells on nanostructured surfaces in extreme wetting conditions of a superhydrophobic or superhydrophilic nature. Oxygen plasma treatment of polymeric surfaces induced the formation of Nanostructures such as bumps or hairs with various aspect ratios, which is defined as the height to diameter ratio. A superhydrophobic surface with a contact angle (CA) of 161.1° was obtained through the hydrophobic coating of a nanostructured surface with a high aspect ratio of 25.8. On the other hand, an opposite extreme wetting surface with a superhydrophilic nature with a CA of 1.7° was obtained through the hydrophilic coating of the same structured surface. The mouse liver cancer cells significantly proliferated on a mild hydrophilic surface with a low aspect ratio nanostructure due to the mild roughness and improvements of mechanical anchoring. However, the superhydrophilic surface with a high aspect ratio nanostructure (i.e., hair shaped) suppressed the growth of the cancer cells due to the limited number of sites for focal adhesion, which restricted the adhesion of cancer cells and resulted in a decrease in the cell-covered area. The superhydrophobic nanostructured surface with a high aspect ratio further restricted the adhesion and growth of the cancer cells; the cell activity was extremely suppressed and the spherical shape of the cancer cells was maintained. Thus, this simple method for fabricating nanostructured surfaces with various wetting conditions might be useful for producing biomedical devices such as stents, implants, drug delivery devices, and detection and/or sensing devices for cancer cells.
-
Thermal stability of superhydrophobic, nanostructured surfaces.
Journal of Colloid and Interface Science, 2012Co-Authors: Sung-chul Cha, Eun Kyu Her, Seong-jin Kim, Hyunchul Roh, Kwang-ryeol Lee, Myoung-woon MoonAbstract:Abstract The thermal stability of superhydrophobic, nanostructured surfaces after thermal annealing was explored. Flat surfaces coated with hydrophobic diamond-like carbon (DLC) via plasma polymerization of hexamethyldisiloxane (HMDSO) showed a gradual decrease in the water contact angle from 90 o to 60 o while nanostructured surfaces maintained superhydrophobicity with more than 150° for annealing temperatures between 25 and 300 °C. It was also found that surfaces with Nanostructures having an aspect ratio of more than 5.2 may maintain superhydrophobicity for annealing temperatures as high as 350 °C; above this temperature, however, the hydrophobicity on surfaces with lower aspect ratio Nanostructures gradually degraded. It was observed that regardless of the aspect ratios of the nanostructure, all superhydrophobic surfaces became superhydrophilic after annealing at temperatures higher than 500 °C.
Yang Chen - One of the best experts on this subject based on the ideXlab platform.
-
high toughness induced by wormlike nanostructure in epoxy thermoset containing amphiphilic pdms pcl block copolymers
Industrial & Engineering Chemistry Research, 2018Co-Authors: Muxuan Li, Zhengguang Heng, Huawei Zou, Yang Chen, Mei LiangAbstract:The modification of epoxy composites through the construction of Nanostructures via self-organization of block copolymers has become a hot topic. In this research, high toughness epoxy thermoset was prepared through constructing wormlike-nanostructure by incorporating amphiphilic polydimethylsiloxane-block-poly(e-caprolactone) block copolymer. The fracture toughness of subsequent epoxy thermosets increased nearly 355% comparing with neat epoxy with the addition of 40 wt % wormlike nanostructure, which was higher than that of thermosets with spherical nanostructure (142%). There was obviously plastic deformation in fractured surfaces of thermosets with wormlike nanostructure, it is believed that a combination of several toughening mechanisms leads to the improvement in fracture toughness. The morphologies transition, dynamic mechanical properties and wetting behavior of the thermoset containing spherical/wormlike Nanostructures are also reported.
-
High Toughness Induced by Wormlike-Nanostructure in Epoxy Thermoset Containing Amphiphilic PDMS–PCL Block Copolymers
Industrial & Engineering Chemistry Research, 2018Co-Authors: Muxuan Li, Zhengguang Heng, Huawei Zou, Yang Chen, Mei LiangAbstract:The modification of epoxy composites through the construction of Nanostructures via self-organization of block copolymers has become a hot topic. In this research, high toughness epoxy thermoset was prepared through constructing wormlike-nanostructure by incorporating amphiphilic polydimethylsiloxane-block-poly(e-caprolactone) block copolymer. The fracture toughness of subsequent epoxy thermosets increased nearly 355% comparing with neat epoxy with the addition of 40 wt % wormlike nanostructure, which was higher than that of thermosets with spherical nanostructure (142%). There was obviously plastic deformation in fractured surfaces of thermosets with wormlike nanostructure, it is believed that a combination of several toughening mechanisms leads to the improvement in fracture toughness. The morphologies transition, dynamic mechanical properties and wetting behavior of the thermoset containing spherical/wormlike Nanostructures are also reported.
Huawei Zou - One of the best experts on this subject based on the ideXlab platform.
-
high toughness induced by wormlike nanostructure in epoxy thermoset containing amphiphilic pdms pcl block copolymers
Industrial & Engineering Chemistry Research, 2018Co-Authors: Muxuan Li, Zhengguang Heng, Huawei Zou, Yang Chen, Mei LiangAbstract:The modification of epoxy composites through the construction of Nanostructures via self-organization of block copolymers has become a hot topic. In this research, high toughness epoxy thermoset was prepared through constructing wormlike-nanostructure by incorporating amphiphilic polydimethylsiloxane-block-poly(e-caprolactone) block copolymer. The fracture toughness of subsequent epoxy thermosets increased nearly 355% comparing with neat epoxy with the addition of 40 wt % wormlike nanostructure, which was higher than that of thermosets with spherical nanostructure (142%). There was obviously plastic deformation in fractured surfaces of thermosets with wormlike nanostructure, it is believed that a combination of several toughening mechanisms leads to the improvement in fracture toughness. The morphologies transition, dynamic mechanical properties and wetting behavior of the thermoset containing spherical/wormlike Nanostructures are also reported.
-
High Toughness Induced by Wormlike-Nanostructure in Epoxy Thermoset Containing Amphiphilic PDMS–PCL Block Copolymers
Industrial & Engineering Chemistry Research, 2018Co-Authors: Muxuan Li, Zhengguang Heng, Huawei Zou, Yang Chen, Mei LiangAbstract:The modification of epoxy composites through the construction of Nanostructures via self-organization of block copolymers has become a hot topic. In this research, high toughness epoxy thermoset was prepared through constructing wormlike-nanostructure by incorporating amphiphilic polydimethylsiloxane-block-poly(e-caprolactone) block copolymer. The fracture toughness of subsequent epoxy thermosets increased nearly 355% comparing with neat epoxy with the addition of 40 wt % wormlike nanostructure, which was higher than that of thermosets with spherical nanostructure (142%). There was obviously plastic deformation in fractured surfaces of thermosets with wormlike nanostructure, it is believed that a combination of several toughening mechanisms leads to the improvement in fracture toughness. The morphologies transition, dynamic mechanical properties and wetting behavior of the thermoset containing spherical/wormlike Nanostructures are also reported.
