Contact Angle of Water on Polymer Surfaces

Yasuda, Takeshi; Okuno, Tatsuyuki; Yasuda, Hideyuki

doi:10.1021/la00019a068

Cited by 149 publications

(87 citation statements)

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“…Therefore, advancing angle data are commonly used to calculate surface and interfacial tension components (27)(28)(29). Contact angle hysteresis has been attributed to solid surface roughness, surface chemical heterogeneity, swelling, penetration of liquid into the solid surface, and surface reorientation of functional groups (11,24,(30)(31)(32)(33)(34)(35), and refs. therein).…”

Section: Contact Angle Hysteresismentioning

confidence: 99%

“…Surface roughness is not expected to result in contact angle hysteresis for surfaces with rugosities less than approximately 0.5 µm (i.e., smooth surfaces) (11). On the other hand, a number of studies (24,(30)(31)(32)(33)(34)(35) have reported that surface chemical heterogeneities, surface swelling, penetration of liquid into the solid surface, and surface reorientation of chemical functional groups can all lead to contact angle hysteresis, even on smooth surfaces.…”

Section: Contact Angle Hysteresismentioning

confidence: 99%

See 1 more Smart Citation

Contact Angle Study on Polymer-Grafted Silicon Wafers

Faibish

Yoshida

Cohen

2002

Journal of Colloid and Interface Science

137

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Section: Contact Angle Hysteresismentioning

confidence: 99%

Section: Contact Angle Hysteresismentioning

confidence: 99%

Contact Angle Study on Polymer-Grafted Silicon Wafers

Faibish

Yoshida

Cohen

2002

Journal of Colloid and Interface Science

137

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“…The phenomenon of hysteresis has been known for a couple of decades and it was explained by roughness of real surfaces and/or their chemical heterogeneity, surface swelling, penetration of liquid into the solid surface, and surface functional groups reorientation [10][11][12][13][14][15][16][17][18][19]. On the other hand, on molecularly smooth surface the advancing and receding contact angles differs for example of cyclohexane on mica by 0.5 o [20].…”

Section: Introductionmentioning

confidence: 99%

Influence of relative humidity on the wettability of silicon wafer surfaces

Hołysz¹,

Mirosław²,

Terpiłowski³

et al. 2008

Annales UMCS, Chemistry

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Investigation of wetting properties of the original silicon wafers and modified by oxidation was carried out by contact angles measurements of water at varying relative humidity (RH) of the atmosphere present in the measuring chamber. At three selected humidities (10, 30 and 50%) contact angles of diiodomethane and formamide were also determined for the original silicon wafer only. The topography of the tested surfaces was determined with the help of atomic force microscopy (AFM). Using the measured contact angles the total apparent surface free energy and its components of studied silicon wafers were determined using two models: the contact angle hysteresis (CAH) and Lifshitz-van der Waals acid-base (LWAB) approaches. In the former approach the advancing and receding contact angles are employed, and in the latter only the advancing angles. It was found that in the case of original silicon wafer the contact angels and surface free energy depend on the humidity only in the RH range from 10 to 40% with a minimum at 30% RH, and then they fluctuate around a mean value. For the oxidized silicon wafer the changes in the contact angles and the surface free energy depend on the relative humidity and change periodically with increasing RH. These changes can result from water adsorption on the hydrophilic silicon surface.

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“…Условия формирования поверхностного слоя желатина существенно влияют на величину начального краевого угла [2, c. 117]. По разным данным, начальное значение краевого угла натекания воды на гидрогеле желатина обычно варьирует в диапазоне 70° ± 13° и вцелом определяется природой, степенью обезжиривания и концентрацией желатина, относительной влажностью воздуха и, до некоторой степени, размером наносимой капли воды [3][4][5][6][7][8][9][10][11][12][13].…”

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Gelatin hydrogel as a model for assessment of the wettability and water-resistance of polypeptide materials

et al. 2015

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УДК 544.72; 544.773.43; 620.193 Поступила в редакцию В работе приведены результаты исследования смачивания водой и подсолнечным маслом поверхности гидрогелей желатина и натуральной выделанной кожи, как таковой и обработанной гидрофобизирующими агентами -поли(1,1,2,2-тетрагидроперфторалкилметакрилатами), где перфторалкил -н-С 6 F 13 и н-С 8 F 17 . Анализируется кинетика изменения краевого угла на гидрогеле и коже с целью установления корреляции между смачиваемостью и водостойкостью образцов, обработанных гидрофобизирующими агентами. ВВЕДЕНИЕГидрогель желатина представляет собой пространственную вязкоупругую сетку, образованную сольватированным денатурированным коллагеном. Рис. 3. Изменение краевых углов подсолнечного масла на исходной поверхности желатиновой пленки (1) и этой поверхности, модифицированной гидрофобизирующими агентами C6F13 (2) и C8F17 (3). Кривые 2`, 3` -изменение краевых углов для тех же систем, протестированных через 4 суток после нанесения агента. AbstractResults of wetting by water and sunflower oil are presented for the gelatin hydrogel surface and the smooth natural leather, as such and cured with water-proofing agents poly(1,1,2,2-tetrahydroperfluoroalkyl methacrylate), where perfluoroalkyl is n-С 6 F 13 and n-С 8 F 17 . Kinetics of the contact angle change on the gelatin hydrogel and leather is analysed in order to found a correlation between the wettability and the water resistance of the samples treated with water-proofing agents.

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Contact Angle of Water on Polymer Surfaces

Cited by 149 publications

References 0 publications

Contact Angle Study on Polymer-Grafted Silicon Wafers

Contact Angle Study on Polymer-Grafted Silicon Wafers

Influence of relative humidity on the wettability of silicon wafer surfaces

Gelatin hydrogel as a model for assessment of the wettability and water-resistance of polypeptide materials

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