Membrane characterization using the contact angle technique I. methodology of the captive bubble technique

Zhang, W.; Hallström, B.

doi:10.1016/0011-9164(90)80067-l

Cited by 101 publications

(33 citation statements)

References 8 publications

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“…The motor speed 0.2 mm/s, dipping length 5 mm. This is based on an energy balance approach to the three-phase equilibrium, which results in Young's equation [18,19]:…”

Section: Techniquesmentioning

confidence: 99%

Comparative study of performances of lipase immobilized asymmetric polysulfone and polyether sulfone membranes in olive oil hydrolysis

Gupta

Yogesh

Javiya

et al. 2008

International Journal of Biological Macromolecules

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“…The motor speed 0.2 mm/s, dipping length 5 mm. This is based on an energy balance approach to the three-phase equilibrium, which results in Young's equation [18,19]:…”

Section: Techniquesmentioning

confidence: 99%

Comparative study of performances of lipase immobilized asymmetric polysulfone and polyether sulfone membranes in olive oil hydrolysis

Gupta

Yogesh

Javiya

et al. 2008

International Journal of Biological Macromolecules

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“…The wettability of the four test materials was determined using the captive bubble technique (Zhang & Hallströ m, 1990). This technique was chosen because it kept the hydrogels hydrated throughout the test, preventing drying of their surfaces and anomalous results (Hermitte et al 2004).…”

Section: Captive Bubble Measurementmentioning

confidence: 99%

The prevention of microfouling and macrofouling on hydrogels impregnated with either Arquad 2C-75® or benzalkonium chloride

Cowie¹,

Smith²,

Hannah³

et al. 2006

Biofouling

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Optically clear, surfactant loaded poly (2-hydroxyethyl methacrylate) (pHEMA) hydrogels can be used to prevent fouling on optical windows of marine underwater sensors. To act successfully in this capacity, hydrogels need to prevent both microfouling and macrofouling. Panel trials were conducted using four different materials: unloaded hydrogels, hydrogels containing either benzalkonium chloride (BAC) or dicocodimethylammonium chloride (Arquad 2C-75) and PMMA coupons. Three panels were deployed at staggered intervals (2, 4 and 6 weeks) before the main settlement season of Semibalanus balanoides and Mytilus edulis in the Firth of Clyde, Scotland. Panels were left for a total period of 10, 12 and 14 weeks respectively. Results showed that no sample completely resisted fouling, but Arquad 2C-75 hydrogels were extremely effective at preventing both microfouling and macrofouling. The most heavily fouled materials were unloaded hydrogels and PMMA, despite differences in initial hydrophilicities. Arquad 2C-75 hydrogels were equally effective at preventing larval settlement, for up to 14 weeks.

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“…The pendant drop mechanical analysis (PDMA) technique is based on the principles of pendant drop tensiometry, which has been used to study a wide range of interfacial phenomena 16–19. Modifications have been made to a commercially available pendant drop tensiometer (NRL C.A.…”

Section: Technique Developmentmentioning

confidence: 99%

Development of pendant drop mechanical analysis as a technique for determining the stress–relaxation and water‐permeation properties of interfacially polymerized barrier layers

Khare

Greenberg

Krantz

2003

J of Applied Polymer Sci

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Interfacial polymerization (IP) involves the formation of solid polymeric films at the interface between aqueous and immiscible organic solutions via an interfacial polycondensation reaction between complementary monomeric reactants present in the two solutions. IP films are very thin (Ͻ0.25 m) and form effective barrier layers in interfacially polymerized thin-film composite membranes. Considerable difficulties are encountered in applying conventional characterization techniques to such unsupported IP thin films. This article describes the development of a novel technique, pendant drop mechanical analysis (PDMA), which can be used to study the mechanical and transport behavior of unsupported IP films. Experiments were conducted on films formed in a PDMA apparatus via the IP polymerization of m-phenylene diamine and trimesoyl chloride (TMC). Stress-relaxation data obtained via PDMA were fitted with the Williams-Watts equation, and the results indicated a statistically significant dependence of the model parameters on the TMC concentration. Permeation experiments also demonstrated a statistically significant dependence of the membrane constant on the TMC concentration. The results provide unique insights regarding the relationship between structure and performance in unsupported IP films and suggest that network formation is enhanced in a concentration range of 0.1-0.3 wt % TMC. Although refinements are required, PDMA appears to be a promising technique for identifying optimum IP reaction conditions and assessing corresponding mechanical and transport characteristics.

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Membrane characterization using the contact angle technique I. methodology of the captive bubble technique

Cited by 101 publications

References 8 publications

Comparative study of performances of lipase immobilized asymmetric polysulfone and polyether sulfone membranes in olive oil hydrolysis

Comparative study of performances of lipase immobilized asymmetric polysulfone and polyether sulfone membranes in olive oil hydrolysis

The prevention of microfouling and macrofouling on hydrogels impregnated with either Arquad 2C-75® or benzalkonium chloride

Development of pendant drop mechanical analysis as a technique for determining the stress–relaxation and water‐permeation properties of interfacially polymerized barrier layers

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