Water contact angle data

Fig. 4 Water contact angle data (a) and surface energy data (b) from a surface energy library produced through the graded UV-ozonolysis of an ODS self-assembled monolayer on sihcon. (Reproduced with permission from [17])...

Fig. 12 Surface expression of block segments in block copolymer gradient libraries after treatment to two solvents. See text for details a illustration of surface expression of PnBMA black) and PDMAEMA blue) block copolymer brush segments after water and hexane treatments b water contact angle data from three PnBMA-b-PDMAEMA block copolymer gradient libraries after hexane filled symbols) and water open symbols) treatments. (Derived from [58] with permission)...

The water contact angle data for VTES on air-dried silica (Figure 6B) indicate a gradual increase in 0H2o with time. The rate of increase and the ultimate value of 0H2o after 20 hours adsorption time were both greater at the higher concentrations. 

It has been shown that water contact angle data of alkyl phosphate SAMs reflect the degree of coverage of SAMs of long-chain alkyl phosphates. Contact angle values of complete monolayers from various types of hydroxy-... 

Fig. 14. Water contact angle data illustrating the reorganization of end-functional polystsrenes in the glassy state. The number in the sample designation refers to the molecular weight in thousands PS is polystyrene, PS-F is fluorosilane-terminated polystyrene, and PS-COOH is carboxylic acid-terminated polyst3rrene. lOOK PS 5K PS-F lOK PS-F X 25K PS-F 6.5K PS-COOH O lOK PS-COOH. From Ref 60.

Each data point represents the average of measurements at three independent, random locations on the screen surface. Also plotted is the methanol/water contact angle data from Addesso and Lund (1997) obtained using the Whilhelmy plate method. Reasonable agreement exists between the data sets. Methanol mass fraction values in this work were chosen consistent with mass fractions from bubble point measurements. Contact angle measurements for mixtures here are also in qualitative agreement with previously... 

Table 3.2 Water contact angle data for Surfaces a and b as a function of spot size and water droplet diameter (data taken from [36])...

Table 4.1 Physical and water contact angle data for the heterogeneous surfaces shown in Fig. 4.1 (data from [3])...

Synthesis of siloxane-urethane copolymers from various hydroxyalkyl-terminated PDMS oligomers and aliphatic diisocyanates, such as tetramethylene- and hexame-thylene diisocyanate and HMDI was reported 333,334). Reactions were conducted either in chloroform or 1,4-dioxane and usually low molecular weight, oily products were obtained. No data were available on the molecular weights or the thermal and mechanical properties of the copolymers obtained. These products were later cross-linked by a peroxide. Resulting materials were characterized by IR spectroscopy and water contact angle measurements for possible use as contact lenses. 

Fig. 17 Dry thickness of poly(acryl amide) (PAAm), /z, (closed symbols) and contact angle of DI water, 6>diw> (open symbols) as a function of the position on the substrate for samples prepared on substrates containing the initiator gradients made of CMPEiPO mixtures (w/w) 1 1 a ( , ) and b 1 5 (A, A). The contact angle data have an error better than 1.5 deg and 1 mm on the vertical and horizontal scales, respectively. (Reproduced with permission from [76])...

Figure 2. Correlation of water contact angles for different counterions with anion-exchange resin selectivity data of Gregor et al. (13)...

In the water desorption test the VTES films on flamed silica proved to be more resistant to change than the VTES films on air-dried silica. This difference is illustrated by the data in Figure 7. On air-dried surfaces after one hour adsorption time the VTES produced a film that initially had a low water contact angle and was not significantly altered in the desorption experiment. By allowing 20 hours contact with the solution a more hydrophobic film was obtained but it was quickly desorbed to a condition equivalent to that for only an hour adsorption time. On flamed silica, in contrast, the film adsorbed after 20 hours adsorption time showed only a slight tendency to lose its hydrophobic character. 

While contact angle data show the influence of water immersion clearly, XPS analysis of atomic ratio for O/C measured at the normally employed take-off angle... 

Contact-Angle Studies. Siloxanes with higher alkyl substituents have thermal properties that are also much more like those of paraffins than of PDMS, as shown by an early study by Hunter and co-workers (8). Figure 2 shows some of their data comparing the water contact angles of soda-lime glass surfaces treated with PDMS, poly(diethylsiloxane), and poly(octadecyl-methylsiloxane). Compared with PDMS, poly(diethylsiloxane) and poly(octa-... 

Figure 2. Water contact angles of soda-lime glass surfaces treated with 0.02% benzene solutions of polyorganosiloxanes. Data were taken from Table I of...

Figure 2. Plot of contact angle data for rat skin collagen films at 50% relative humidity and when completely water swollen...

Jaffe, R.L., Gonnet, P., Werder, T., et al. (2004). Water—carbon interactions. 2 Calibration of potentials using contact angle data for different interaction models. Mol. Sim., 30, 205-16. 

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