Dynamic contact angle on a reconstructive polymer surface by segregation

Inutsuka, Manabu; Tanoue, Hirokazu; Yamada, Norifumi L.; Ito, Kohzo; Yokoyama, Haruki

doi:10.1039/c7ra00708f

Cited by 21 publications

(30 citation statements)

References 30 publications

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“…The static contact angle of virgin PS was found to be 80 °, and increasing the concentration of PEG, the contact angle was decreased [25]. The PSP5 blend with 5% PEG concentration has demonstrated contact angle of 66 ° [26]. By increasing the concentration of PEG up to 10% in the PSP10 blend, the contact angle was found to be 63 ° [27].…”

Section: Contact Angle and Surfacementioning

confidence: 94%

Antialgal Synergistic Polystyrene Blended with Polyethylene Glycol and Silver Sulfadiazine for Healthcare Applications

Anjum

Mushtaq

Abbas

et al. 2021

Advances in Polymer Technology

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Polystyrene (PS) was blended with polyethylene glycol (PEG) and silver sulfadiazine (SS) with different weight proportions to form polymeric blends. These synthesized blends were preliminary characterized in terms of functional groups through the FTIR technique. All compositions were subjected to thermogravimetric analysis for studying thermal transition and were founded thermally stable even at 280°C. The zeta potential and average diameter of algal strains of Dictyosphaerium sp. (DHM1), Dictyosphaerium sp. (DHM2), and Pectinodesmus sp. (PHM3) were measured to be -32.7 mV, -33.0 mV, and -25.7 mV and 179.6 nm, 102.6 nm, and 70.4 nm, respectively. Upon incorporation of PEG and SS into PS blends, contact angles were decreased while hydrophilicity and surface energy were increased. However, increase of surface energy did not led to decrease of antialgal activities. This has indicated that biofilm adhesion is not a major antialgal factor in these blended materials. The synergetic effect of PEG and SS in PS blends has exhibited significant antialgal activity via the agar disk diffusion method. The PSPS10 composition with 10 w / w % PEG and 10 w / w % SS has exhibited highest inhibition zones 10.8 mm, 10.8 mm, and 11.3 mm against algal strains DHM1, DHM2, and DHM3, respectively. This thermally stable polystyrene blends with improved antialgal properties have potential for a wide range of applications including marine coatings.

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Section: Contact Angle and Surfacementioning

confidence: 94%

Antialgal Synergistic Polystyrene Blended with Polyethylene Glycol and Silver Sulfadiazine for Healthcare Applications

Anjum

Mushtaq

Abbas

et al. 2021

Advances in Polymer Technology

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“…Since the interfacial energy is lowered in the new chain arrangement, the droplet tends to increase the contact area with the surface, so the contact line moves outward, which triggers chain reconfiguration in the newly wetted area and further lowers the interfacial energy. [ 69 ] The wetting process continues, resulting in an elongating contact line and decreasing contact angle. In the meantime, water adsorption happens on the interface due to the strong interaction between the metal–ligand coordination sites and the water molecules.…”

Section: Resultsmentioning

confidence: 99%

Enabling Tunable Water‐Responsive Surface Adaptation of PDMS via Metal–Ligand Coordinated Dynamic Networks

Zhang

Crisci

Finlay

et al. 2022

Adv Materials Inter

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emerging as an enabling technology. [1][2][3][4] The combination of flexibility and responsiveness allows applications in various fields, including wearable electronics, soft robotics, drug delivery, biomedical devices, and biomimetic design. [5][6][7][8][9][10] Among various material options, polymers play an essential role in fabricating flexible sensors and soft actuators due to their tailorability and the potential of integrating multiple functionalities, such as adaptive response to signals (e.g., chemical, mechanical, electrical), energy harvesting and storage, and biochemical sensing. [3,10] Adding responsive functionality to a polymer often involves methods such as copolymerizing monomers with different capability, attaching layers of active materials to a polymer matrix, building in molecular orientation or internal polarization, introducing structural heterogeneity by combining amorphous and crystalline domain or multi-layer assembly, and preparing composites by hybridizing organic and inorganic materials. [2,[11][12][13][14] Among various techniques, utilizing dynamic chemistry to enable polymer responsivity has received significant attention in the past few decades. [15,16] Reversible interactions, including dynamic covalent bonding, hydrogen bonding, ionic bonding, π-π stacking, and metal-ligand coordination, are susceptible to environmental variation and can achieve multiple physical and chemical responses via bond breaking and reforming. [17][18][19][20][21] Fascinating material properties arise from disrupting the equilibrium state of dynamic bonding, for example: polymers with spiropyran go through force-induced covalent-bond activation and give rise to visible color and fluorescence; supramolecular polymers containing metal-ligand motifs can self-heal by exposing to ultraviolet irradiation; and polymers functionalized by self-complementary hydrogen bonded ureidopyrimidinone (UPy) moieties shows shape-memory effect through temperature change. [22][23][24] Among these options, metal-ligand coordination bonding is particularly appealing to realize a particular desired response, because of the ease of tuning the stability of the bond.One of the most popular polymers for fabricating sensors and actuators is polydimethylsiloxane (PDMS). [2,7] It commonly serves as an essential substrate or a responsive component due to the attractive physical and chemical properties, including low Polymers are at the core of emerging flexible sensor and soft actuator technology. Ideal candidates not only respond to external stimuli but also have programmable response intensity and speed. Incorporating dynamic interactions into polymers has been widely studied. However, most research has focused on synthesis methods and on optical and mechanical effects of these interactions. Here, a new and tunable method of enabling environmentally adaptive polymers are introduced. Specifically, polar functionalities are "hidden" within polydimethylsiloxane (PDMS). When unveiled, these polar functionalities change the hydrophilicity ...

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“…In short, the thickness ( t 1 ) and Gaussian roughness at the surface (σ 1 ) of the dPMMA film were determined to be 67.6 and 0.2 nm, respectively. Fitting analysis based on a sublayer model revealed that the PMEA layer with a thickness ( t 2 ) of 12.9 nm at most was formed on the dPMMA film after the treatment. Also, since the Gaussian roughness of 0.9 nm at the PMEA/dPMMA interface was greater than the 0.2 nm at the air/dPMMA interface or the dPMMA surface, it seems most likely that PMEA chains were diffused into the surface region of the dPMMA film.…”

Section: Resultsmentioning

confidence: 99%

A Facile Surface Functionalization Method for Polymers Using a Nonsolvent

Hirata¹,

Taneda²,

Nishio³

et al. 2020

ACS Appl. Bio Mater.

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Surface treatment of polymeric solids without impairing their bulk properties is a crucial functionalization strategy for the promotion of their wider application. We here propose a facile method using a nonsolvent which can subtly alter or swell the polymer surface to be modified. A thin film of poly(methyl methacrylate) (PMMA) was immersed in a methanol solution of poly(2methoxyethyl acrylate) (PMEA). Electron spectroscopy for chemical analysis and neutron reflectometry revealed that a PMEA layer formed on the PMMA film with a diffused interface. The PMEA layer was very swollen in water and exhibited the ability to suppress serum protein adsorption and platelet adhesion on it. The functionalization technique using a nonsolvent was also applicable to the surface of other polymeric solids such as polyurethane.

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Dynamic contact angle on a reconstructive polymer surface by segregation

Abstract: A peculiar time evolution of contact angle of water on reconstructive polymer surface was analyzed.

Cited by 21 publications

References 30 publications

Antialgal Synergistic Polystyrene Blended with Polyethylene Glycol and Silver Sulfadiazine for Healthcare Applications

Antialgal Synergistic Polystyrene Blended with Polyethylene Glycol and Silver Sulfadiazine for Healthcare Applications

Enabling Tunable Water‐Responsive Surface Adaptation of PDMS via Metal–Ligand Coordinated Dynamic Networks

A Facile Surface Functionalization Method for Polymers Using a Nonsolvent

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