Moisture Sorption and Thermodynamic Properties of Wood under Dynamic Condition
Thermodynamic approach is a useful method to study interactions between water and wood at molecular level. This work investigated the dynamic moisture sorption and thermodynamic properties for two thick poplar woods (Populus euramericana Cv.) subjected to sinusoidal relative humidity (RH) changes be...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2016/2454610 |
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| _version_ | 1832559096472010752 |
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| author | Tiantian Yang Erni Ma |
| author_facet | Tiantian Yang Erni Ma |
| author_sort | Tiantian Yang |
| collection | DOAJ |
| description | Thermodynamic approach is a useful method to study interactions between water and wood at molecular level. This work investigated the dynamic moisture sorption and thermodynamic properties for two thick poplar woods (Populus euramericana Cv.) subjected to sinusoidal relative humidity (RH) changes between 45% and 75% for cyclic period of 1, 6, and 24 h, at two temperatures of 25°C and 40°C. Moisture changes of the specimens were measured during the successive adsorption and desorption processes, giving the following results: (1) moisture content changed sinusoidally with the imposed RH and was inversely related to specimen thickness as well as temperature, but in a positive correlation with cyclic periods; (2) all of QL, ΔG, and TΔS of the adsorbed water during dynamic sorption decreased with increasing moisture content or specimen thickness and decreasing cyclic period. However, temperature had opposite effects on ΔG and TΔS. (3) Both moisture sorption hysteresis and thermodynamic sorption hysteresis could be found. The former became weak with rising temperature or thicker specimens, while the latter got clear when temperature or specimen thickness increased. |
| format | Article |
| id | doaj-art-beb3431bb9064ecda263d355938bc933 |
| institution | Kabale University |
| issn | 1687-9422 1687-9430 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Polymer Science |
| spelling | doaj-art-beb3431bb9064ecda263d355938bc9332025-02-03T01:30:56ZengWileyInternational Journal of Polymer Science1687-94221687-94302016-01-01201610.1155/2016/24546102454610Moisture Sorption and Thermodynamic Properties of Wood under Dynamic ConditionTiantian Yang0Erni Ma1College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, ChinaCollege of Materials Science and Technology, Beijing Forestry University, Beijing 100083, ChinaThermodynamic approach is a useful method to study interactions between water and wood at molecular level. This work investigated the dynamic moisture sorption and thermodynamic properties for two thick poplar woods (Populus euramericana Cv.) subjected to sinusoidal relative humidity (RH) changes between 45% and 75% for cyclic period of 1, 6, and 24 h, at two temperatures of 25°C and 40°C. Moisture changes of the specimens were measured during the successive adsorption and desorption processes, giving the following results: (1) moisture content changed sinusoidally with the imposed RH and was inversely related to specimen thickness as well as temperature, but in a positive correlation with cyclic periods; (2) all of QL, ΔG, and TΔS of the adsorbed water during dynamic sorption decreased with increasing moisture content or specimen thickness and decreasing cyclic period. However, temperature had opposite effects on ΔG and TΔS. (3) Both moisture sorption hysteresis and thermodynamic sorption hysteresis could be found. The former became weak with rising temperature or thicker specimens, while the latter got clear when temperature or specimen thickness increased.http://dx.doi.org/10.1155/2016/2454610 |
| spellingShingle | Tiantian Yang Erni Ma Moisture Sorption and Thermodynamic Properties of Wood under Dynamic Condition International Journal of Polymer Science |
| title | Moisture Sorption and Thermodynamic Properties of Wood under Dynamic Condition |
| title_full | Moisture Sorption and Thermodynamic Properties of Wood under Dynamic Condition |
| title_fullStr | Moisture Sorption and Thermodynamic Properties of Wood under Dynamic Condition |
| title_full_unstemmed | Moisture Sorption and Thermodynamic Properties of Wood under Dynamic Condition |
| title_short | Moisture Sorption and Thermodynamic Properties of Wood under Dynamic Condition |
| title_sort | moisture sorption and thermodynamic properties of wood under dynamic condition |
| url | http://dx.doi.org/10.1155/2016/2454610 |
| work_keys_str_mv | AT tiantianyang moisturesorptionandthermodynamicpropertiesofwoodunderdynamiccondition AT ernima moisturesorptionandthermodynamicpropertiesofwoodunderdynamiccondition |