TPM表征PAN凝固丝孔结构的影响因素  

Factors affecting the characterization of pore structure of PAN coagulated fibers by TPM

作　　者：潘世龙 史纪友 张玥[1,2] 张育红 张玉梅[1,2] 刘俊彦 Pan Shilong;Shi Jiyou;Zhang Yue;Zhang Yuhong;Zhang Yumei;Liu Junyan(College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;State Key Laboratory for Material Modification of Chemical Fibers,Donghua University,Shanghai 201620,China;Sinopec Shanghai Research Institute of Petrochemical Technology Co.,Ltd.,Shanghai 201208,China)

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620 [3]中石化(上海)石油化工研究院有限公司,上海201208

出　　处：《产业用纺织品》2024年第12期42-49,共8页Technical Textiles

摘　　要：热孔计法(TPM)可根据受限空间内液-固相转变温度的变化程度,推算材料中的孔径尺寸和分布、孔体积及内表面积。以湿法纺丝制备的聚丙烯腈(PAN)凝固丝为研究对象,通过优化试样处理方法和测试条件,建立TPM表征PAN凝固丝孔结构参数的方法。研究结果表明:TPM的可测孔径范围为1.7~50 nm;制样方法和测试条件均影响TPM的测试结果,测试前须对PAN凝固丝进行冷冻干燥,且制样时还需控制水分比不小于2.84 g/g;PAN凝固丝的孔结构参数适合通过连续法升温方式进行表征,且最佳升温速率为1.0℃/min。Thermoporometry(TPM)can be used to calculate the pore size and distribution,pore volume and internal surface area of materials according to the change degree of liquid-solid phase transition temperature in confined space.Taking wet-spun polyacrylonitrile(PAN)coagulated fiber as the research object,a set of methods for characterizing the pore structure parameters of PAN coagulated fiber by TPM were established through optimizing the sample treatment methods and test conditions.The resulTSshowed that the measurable pore size of TPM ranged from 1.7 nm to 50 nm.Both the sample preparation methods and the test conditions affected the test resulTSof TPM.The PAN coagulated fibers should be freeze-dried before test,and the water ratio should be controlled not less than 2.84 g/g during the sample preparation.The pore structure parameters of PAN coagulated fibers were suitable to be characterized by continuous heating method,and the optimal heating rate was 1.0℃/min.

关 键 词：孔尺寸 孔结构 热孔计法(TPM) 聚丙烯腈(PAN) 凝固丝 

分 类 号：TQ342.31[化学工程—化纤工业]