Surface Characterization of Plasma-modified Poplar Veneer: Dynamic Wettability
The dynamic wettability of plasma-modified poplar veneer was investigated with sessile adhesive droplets using a wetting model. Dynamic contact angle, instantaneous and equilibrium contact angles, and their rates of change (K-value) were used to illustrate the dynamic wetting process. The experiment...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2014-11-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_1_369_Tang_Surface_Characterization_Plasma_Poplar |
| _version_ | 1811311847256621056 |
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| author | Lijuan Tang Xuehui Yang Minzhi Chen Xiangming Wang Xiaoyan Zhou |
| author_facet | Lijuan Tang Xuehui Yang Minzhi Chen Xiangming Wang Xiaoyan Zhou |
| author_sort | Lijuan Tang |
| collection | DOAJ |
| description | The dynamic wettability of plasma-modified poplar veneer was investigated with sessile adhesive droplets using a wetting model. Dynamic contact angle, instantaneous and equilibrium contact angles, and their rates of change (K-value) were used to illustrate the dynamic wetting process. The experiment consisted of selecting treatment parameters (type of gas, power) that would lead to the increased wettability of wood. Three resin systems, urea-formaldehyde (UF), phenol-formaldehyde (PF), and diphenylmethylene diisocyanate (MDI), were evaluated. Based on the wetting model, the K-value was used to interpret the kinetics of wetting. The higher the K-value, the faster the contact angle reaches equilibrium, and the faster the liquid penetrates and spreads. Therefore, the model was helpful for characterizing the dynamic wettability of wood surfaces modified with different plasma treatments. The K-values of plasma-treated veneer surfaces at different plasma power levels and with different gases (such as O2, N2, Ar, air, and NH3) were 458% to 653% and 332% to 528% higher than those of untreated veneer surfaces, respectively. In addition, the K-values of the three resins on the oxygen plasma-treated veneer surfaces were 38% to 1204% higher than those on the untreated veneer surfaces. Therefore, this method was helpful for characterizing the dynamic wettability of veneer surfaces modified with plasma treatment. |
| first_indexed | 2024-04-13T10:26:14Z |
| format | Article |
| id | doaj.art-66c9712ca60e46dfa689924a965bfd48 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-04-13T10:26:14Z |
| publishDate | 2014-11-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-66c9712ca60e46dfa689924a965bfd482022-12-22T02:50:18ZengNorth Carolina State UniversityBioResources1930-21261930-21262014-11-0110136938110.15376/biores.10.1.369-381Surface Characterization of Plasma-modified Poplar Veneer: Dynamic WettabilityLijuan Tang0Xuehui Yang1Minzhi Chen2Xiangming Wang3Xiaoyan Zhou4College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; FPInnovations, 319 rue Franquet, Québec (Québec) G1P 4R4, Canada; ChinaCollege of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; ChinaCollege of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; China FPInnovations, 319 rue Franquet, Québec (Québec) G1P 4R4, Canada; CanadaCollege of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; ChinaThe dynamic wettability of plasma-modified poplar veneer was investigated with sessile adhesive droplets using a wetting model. Dynamic contact angle, instantaneous and equilibrium contact angles, and their rates of change (K-value) were used to illustrate the dynamic wetting process. The experiment consisted of selecting treatment parameters (type of gas, power) that would lead to the increased wettability of wood. Three resin systems, urea-formaldehyde (UF), phenol-formaldehyde (PF), and diphenylmethylene diisocyanate (MDI), were evaluated. Based on the wetting model, the K-value was used to interpret the kinetics of wetting. The higher the K-value, the faster the contact angle reaches equilibrium, and the faster the liquid penetrates and spreads. Therefore, the model was helpful for characterizing the dynamic wettability of wood surfaces modified with different plasma treatments. The K-values of plasma-treated veneer surfaces at different plasma power levels and with different gases (such as O2, N2, Ar, air, and NH3) were 458% to 653% and 332% to 528% higher than those of untreated veneer surfaces, respectively. In addition, the K-values of the three resins on the oxygen plasma-treated veneer surfaces were 38% to 1204% higher than those on the untreated veneer surfaces. Therefore, this method was helpful for characterizing the dynamic wettability of veneer surfaces modified with plasma treatment.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_1_369_Tang_Surface_Characterization_Plasma_PoplarPlasma treatmentPoplar veneerDynamic wettabilityK-value |
| spellingShingle | Lijuan Tang Xuehui Yang Minzhi Chen Xiangming Wang Xiaoyan Zhou Surface Characterization of Plasma-modified Poplar Veneer: Dynamic Wettability BioResources Plasma treatment Poplar veneer Dynamic wettability K-value |
| title | Surface Characterization of Plasma-modified Poplar Veneer: Dynamic Wettability |
| title_full | Surface Characterization of Plasma-modified Poplar Veneer: Dynamic Wettability |
| title_fullStr | Surface Characterization of Plasma-modified Poplar Veneer: Dynamic Wettability |
| title_full_unstemmed | Surface Characterization of Plasma-modified Poplar Veneer: Dynamic Wettability |
| title_short | Surface Characterization of Plasma-modified Poplar Veneer: Dynamic Wettability |
| title_sort | surface characterization of plasma modified poplar veneer dynamic wettability |
| topic | Plasma treatment Poplar veneer Dynamic wettability K-value |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_1_369_Tang_Surface_Characterization_Plasma_Poplar |
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