Mechanical and barrier properties of edible chitosan films as affected by composition and storage
Mechanical and barrier properties of edible chitosan films as affected by composition and storage
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DOI：
10.1111/j.1365-2621.1996.tb10909.x
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发表时间：
1996-09-01
影响因子：
3.9
通讯作者：
Wiles, JL
中科院分区：
文献类型：
--
作者：
Butler, BL;Vergano, PJ;Wiles, JL
测定了用两种浓度（0.25 和 0.50 mL/g 壳聚糖）甘油增塑的壳聚糖薄膜的氧渗透系数 (OF)、水蒸气渗透系数 (WVP)、乙烯渗透系数 (EP)、拉伸强度 (TS) 和断裂伸长率 (%E)。薄膜样品在储存 0、2、4、8 和 12 周后进行测试。在存储的前 2 周期间，渗透性最初下降后，平均 OP (4.6x10(-5) cc/m . 天 . atm) 和平均 EP (2.3x10(-4) cc ./m . 天 . atm) 保持不变，而平均 WVP (2.2x10(-1) g/m . 天 . atm) 随存储时间而下降。相对于储存时间，TS 值 (15-30 MPa) 降低，%E 值 (25%-45%) 增加。 OP 和 EP 值在储存过程中的稳定性未达到预期，而机械性能的变化符合预期。
Oxygen permeability coefficients (OF), water vapor permeability coefficients (WVP), ethylene permeability coefficients (EP), tensile strength (TS) and percent elongation (%E) at break values were determined for chitosan films plasticized with glycerin at two concentrations (0.25 and 0.50 mL/g chitosan). Film samples were tested after 0, 2, 4, 8 and 12 wk of storage. After an initial drop in permeability during the first 2 wk of storage, mean OP (4.6x10(-5) cc/m . day . atm) and mean EP (2.3x10(-4) cc ./m . day . atm) remained constant while mean WVP (2.2x10(-1) g/m . day . atm) decreased with respect to storage time. TS values (15-30 MPa) decreased and %E values (25%-45%) increased with respect to storage time. The stability of OP and EP values with storage was not expected, while the change in mechanical properties was as expected.