剑麻纤维增强胶原基复合材料

用戊二醛作交联剂对皮革下脚料中提取的胶原水解物进行交联改性，采用溶胀度表征了材料的交联程度。探讨了戊二醛用量、胶原蛋白浓度和丙三醇含量对材料溶胀度的影响，并使用红外光谱对交联产物进行了表征。以改性胶原蛋白为基体、剑麻纤维为增强相，制备了剑麻纤维/胶原蛋白复合材料。用扫描电子显微镜对复合材料的形貌进行了表征，探讨了剑麻纤维的表面处理、纤维含量以及长度对复合材料力学性能的影响。结果表明，对剑麻纤维表面进行碱处理可以改善纤维的表面结构，增加纤维与基体的界面粘结，提高复合材料的力学性能。当剑麻纤维质量分数为15 %、纤维长度为 7～8 mm时，复合材料具有较好的力学性能。该复合材料可望在包装垫隔材料方面得以应用。 

Sisal f iber reinforced collagen composites

The collagen was crosslinked by glutaraldehyde ( GTA) . The influences of the GTA content , collagen concent ration and glycerol content on the swelling ratio of the modified collagen were investigated. Using the modi2fied collagen as the mat rix and sisal fiber as the reinforcement , the sisal fiber/ collagen composite was prepared. The morphologies of the composites were characterized by using scanning elect ron microscopy (SEM) . The influences of the sisal fiber t reatment , fiber content and fiber length on the mechanical properties of the composites were discussed. It is found that the alkali t reatment improves the surface st ructure of the sisal fiber and increases the mechanical properties of the composite. The mechanical properties were improved dramatically when the sisal fiber mass f raction is 15 % and the fiber length is 7～8 mm. The composites can be used as packaging materials.