Rouilly A, Geneau-Sbartaï C, Rigal L
INRA, UMR 1010, F-31077 Toulouse, France.
Bioresour Technol. 2009 Jun;100(12):3076-81. doi: 10.1016/j.biortech.2008.12.047. Epub 2009 Feb 20.
Thermoplastic sugar beet pulp (thermo-mechanical processing was discussed in previous studies) was formed into film strips by extrusion. Film tensile properties are discussed according to the molecular structure of external plasticizer. Sorbitol, fructose and adipic acid have a marked antiplasticizing effect, while urea and xylitol gave higher ultimate tensile stress than glycerol for a comparable strain at break. Xylitol can be considered as the best plasticizer with UTS and EL of, respectively, 4.9 MPa and 11.3% and water absorption (85% RH, 25 degrees C) was less than 25%. Glycidyl methacrylate was directly used in the extrusion process as cross-linker. In high humidity atmosphere (97% RH, 25 degrees C), film water absorption was then kept under 40% while tensile strength and strain were improved of 50% and with a 30 min UV post-treatment the mass gain in absorption was even less than 30% after 5 days.
热塑性甜菜浆（热机械加工在先前的研究中已有讨论）通过挤压制成薄膜条带。根据外部增塑剂的分子结构对薄膜拉伸性能进行了讨论。山梨醇、果糖和己二酸具有显著的抗增塑作用，而在断裂应变相当的情况下，尿素和木糖醇的极限拉伸应力高于甘油。木糖醇可被视为最佳增塑剂，其极限拉伸应力和断裂伸长率分别为4.9兆帕和11.3%，且在25℃、相对湿度85%的条件下吸水率小于25%。甲基丙烯酸缩水甘油酯在挤压过程中直接用作交联剂。在高湿度环境（25℃、相对湿度97%）下，薄膜吸水率保持在40%以下，同时拉伸强度和应变提高了50%，经过30分钟紫外线后处理，5天后吸收的质量增益甚至小于30%。
