It could be seen that water uptake capacity varied with temperature. All the water uptake capacities of chitosan films tested between 10 to 40◦C were higher than 500 g/g, indicating the chitosan film can work well in a wide range of temperature. The maximum water uptake capacity was found on the temperature at 20◦C, showing a temperature-responsive character within the temperature range tested. The results indicated that the hydrogen bond between chitosan and water plays a dominant role at temperature below 20◦C, and hydrophobic forces between chitosan chains exceeds the effect of hydrogen bond at temperature above20◦C, leading to a rapid release of water