现代纺织技术2025，Vol.33Issue(6)：119-125,7.DOI:10.19398/j.att.202410049
聚己内酯/明胶纳米纤维膜的制备及其吸附性能
Preparation of PCL/GEL nanofiber membrane and its adsorption properties
摘要
Abstract
Water pollution is a global issue that has posed threats to both aquatic and human life for decades.The severity of water pollution and its associated health problems has significantly escalated in the 21st century,primarily due to population growth and urbanization.It is estimated that global freshwater demand will increase by 35％by 2050,which will exacerbate the problems of water pollution and scarcity.Currently,various chemical,physical,and biological methods have been introduced to address the challenge of water purification.Polycaprolactone(PCL)is a non-toxic,biodegradable hydrophobic polymer with excellent flexibility and plasticity.Gelatin(GEL)is a hydrophilic conductive cationic biopolymer with high biocompatibility and antibacterial activity.GEL exhibits the ability to bind to functional surfaces through electrostatic interactions and hydrogen bonding.This paper focuses on the fabrication of PCL/GEL nanofiber membranes for heavy metal adsorption by combining PCL's superior mechanical properties and spinnability with GEL biopolymer's excellent hydrophilicity and surface charge density. To construct the PCL/GEL nanofiber membrane,a volume ratio of 4∶1 between PCL and GEL spinning solutions was employed.Utilizing electrospinning technology,uniform and smooth PCL/GEL composite nanofibers with an average diameter of 230.49 nm were prepared under conditions of a spinning voltage of 12 kV,a flow rate of 1 mL/h,and a spinning distance of 12 cm.Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),and a JY-82 video contact angle measuring instrument were used to analyze and test the surface functional groups,crystal structure,and water contact angle of the nanofiber membrane,respectively.The results indicated that the characteristic peaks of both PCL and GEL appeared in the FTIR spectrum of the PCL/GEL fiber membrane,with only intensity variations observed in the absorption peaks,indicating a physical mixture of PCL and GEL.Due to the low content of PCL in the PCL/GEL nanofiber membrane,the XRD pattern of PCL/GEL resembled that of pure GEL.Furthermore,the combination of GEL and PCL significantly enhanced the hydrophilicity of the PCL/GEL composite nanofiber membrane.This enhancement was primarily attributed to the abundance of polar groups such as-NH2,—OH and-COOH/—COO-in GEL,which can form hydrogen bonds with water molecules. Finally,the adsorption properties of PCL,GEL,and PCL/GEL nanofiber membranes were evaluated using Cu2+as the target ion.Adsorption experiments demonstrated that the optimal adsorption conditions for PCL/GEL nanofiber membranes to exhibit the best adsorption capacity for Cu2+were as follows:an initial Cu2+concentration of 600 mg/L,a pH value of 6,and an adsorption time of 2 hours.Under these conditions,the saturated adsorption capacity of the PCL/GEL nanofiber membrane was found to be 27.42 mg/g,which was more than twice that of the pure PCL nanofiber membrane.Additionally,the adsorption behavior of Cu2+onto PCL/GEL nanofiber membranes was more consistent with the Langmuir model.These results demonstrate that PCL/GEL nanofiber membranes possess high Cu2+adsorption capacity and have potential applications in the removal of heavy metal ions.关键词
静电纺丝/聚己内酯/明胶/铜离子/吸附Key words
electrospinning/polycaprolactone/gelatin/copper ions/adsorption分类
轻工纺织引用本文复制引用
杨海贞,王一冰,马闯,安宇博,吕梦燕,陈鸽..聚己内酯/明胶纳米纤维膜的制备及其吸附性能[J].现代纺织技术,2025,33(6):119-125,7.基金项目
河南省高等学校重点科研项目(25B540002) （25B540002）
国家级大学生创新创业训练计划项目(202410465024) （202410465024）
河南省大学生创新创业训练计划项目(202410465026) （202410465026）
河南省科技攻关项目(222102230065) （222102230065）
中原工学院青年人才创新能力基金项目(K2020QN003) （K2020QN003）
