Sustainable Biofuels and Co-Products Research Unit, Eastern Regional Research Center, USDA, ARS, 600 East Mermaid Lane, Wyndmoor, PA, 19038, United States.
Sustainable Biofuels and Co-Products Research Unit, Eastern Regional Research Center, USDA, ARS, 600 East Mermaid Lane, Wyndmoor, PA, 19038, United States.
Carbohydr Polym. 2019 Jun 1;213:382-392. doi: 10.1016/j.carbpol.2019.03.018. Epub 2019 Mar 6.
Arabinoxylans (AX) are potential agricultural co-products for material applications. Sorghum has seen increased production as a bioenergy crop for biofuel and co-product generation. AX from three sorghum fractions (bran, bagasse, and biomass) were isolated to study film formation. All three AX fractions exhibited high moisture sensitivity. Sorghum biomass AX produced low water vapor permeability compared to sorghum bran or sorghum bagasse AX films. Glycerol addition to sorghum bran AX films reduced tensile strength from 34.8 to 16.0 MPa at 0% and 10% (w/w) glycerol, respectively; reduced the storage and loss moduli during dynamic mechanical analyses at 50% relative humidity (RH) and decreased the rubber-to-plastic material transition temperature at 50% RH, from 78.1 °C to 38.4 °C at 0 and 10% (w/w) glycerol, respectively. Sorghum bran AX, while sensitive to water absorption at high RH, produced favorable strength performance compared to AX from other cereal grains indicating potential utilization as a renewable material.
阿拉伯木聚糖（AX）是一种有潜力的农业副产物，可用于材料应用。随着生物能源作物用于生物燃料生产和副产物开发，高粱的产量有所增加。本研究从高粱的三个部分（糠皮、蔗渣和生物质）中分离出 AX，以研究其成膜性能。这三种 AX 均表现出较高的吸湿性。与高粱糠皮或高粱蔗渣 AX 薄膜相比，高粱生物质 AX 产生的水蒸气透过率较低。甘油的添加降低了高粱糠皮 AX 薄膜的拉伸强度，在 0%和 10%（w/w）甘油下，分别从 34.8 MPa 降至 16.0 MPa；在 50%相对湿度（RH）下的动态力学分析中，降低了储能模量和损耗模量；在 50% RH 下，降低了橡胶-塑料材料转变温度，从 78.1°C 降至 38.4°C，在 0%和 10%（w/w）甘油下分别如此。尽管高粱糠皮 AX 在高 RH 下对水分吸收敏感，但与其他谷物的 AX 相比，其强度性能更优，表明其作为可再生材料具有潜在的应用价值。
