摘要
为了研究棉纤维的水热行为,以微晶纤维素和葡萄糖为模型化合物,探讨水热条件下棉纤维的碳化过程及结构演变特性。分别利用HPLC、SEM、XRD、FTIR、XPS及EA对水热液相主要产物和水热焦炭的结构及性质进行了表征分析。结果表明,棉纤维可在水热条件下碳化形成炭微球,碳化产物与微晶纤维素和葡萄糖的水热碳化产物具有类似的晶体结构和含氧官能团,但产物形貌结构与性能较差;葡萄糖是棉纤维水解碳化成球的重要中间产物;棉纤维水解为葡萄糖的收率较低,只有部分棉纤维水解为单糖,进而产生两种不同的碳化路径,主要产物形貌为不规则颗粒物。
In order to study the behaviors of waste cotton fiber under hydrothermal conditions,the carbonization process and physicochemical characteristics of waste cotton fiber were explored with microcrystalline cellulose and glucose as models.The structures and properties of different hydrothermally carbonized products were investigated with SEM,XRD,FTIR,XPS and EA while liquid products were characterized by HPLC.The results showed that cotton fiber could form carbon microspheres under hydrothermal conditions.Although the products of cotton fiber had similar crystal structures and oxygen functional groups with the carbonized products of microcrystalline cellulose and glucose,the morphology and properties were worse.Glucose was the key intermediate during the process of carbon microspheres formation from cotton fiber.As cotton fiber had low yield of glucose,only part of that could hydrolysis to simple sugars.These induce two different carbon paths.The main morphology of products is irregular particle.Decreasing the p H of reaction system may promote the cotton fiber carbonized into microspheres.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2016年第4期366-371,376,共7页
Fine Chemicals
基金
国家自然科学基金(51443005
51302183)~~
关键词
棉纤维
回收再利用
水热碳化
碳微球
结构特性
功能材料
cotton fibers
recycling
hydro-char
carbon microsphere
structural characteristics
functional materials
