摘要
本文以埃洛石纳米管(HNTs)对再生丝素蛋白(RSF)进行共混改性,采用流延法制备了一种新型的生物吸附剂HNTs/RSF复合膜。表征结果表明,25%HNTs/RSF复合膜具有良好的机械性能和热稳定性,其中25%HNTs/RSF复合膜的断裂强度和断裂伸长率分别达到(6.67±0.65)MPa和291.17%±16.74%,相比RSF膜分别提高了84.3%和278.2%。通过傅里叶变换红外光谱(FTIR)和广角X射线衍射(WAXD)分析表明,HNTs降低了RSF膜的β折叠和结晶度。进一步通过亚甲基蓝的吸附实验表明,增加环境的碱性或HNTs含量,均有助于提高其吸附性能,在300 min后基本达到吸附平衡。本文基于此制备了具有高吸附性能和优异机械性能的HNTs/RSF复合膜,在医药化工废水处理和生物吸附等领域具有较高的开发和利用价值。
Dye wastewater is becoming a serious environmental problem due to its toxicity,unacceptable color,high chemical oxygen demand,and resistance to chemical,photochemical and biological degradation.The release of organic dyes into water systems takes the form of pharmaceutical and chemical wastewater,agricultural runoff,and chemical spills.In order to achieve sustainable development,the research,development,and application of degradable natural polymeric materials-silk proteins,have attracted a lot of attention from researchers in terms of adsorbent substrate materials.China is a large producer and processor of silk,accounting for 65%of the global production of raw silk.During the production and processing of silk,a large amount of trimmings are produced.However,the current unmodified pure silk fibroin protein film has disadvantages such as poor mechanical properties,high water solubility,and instability.Regenerated silk fibroin protein(RSF)is a protein obtained from silkworm cocoons through degumming,dissolving,and dialysis.At the same time,it can be processed into the form of fibers,films,gels,microspheres,etc.Halloysite nanotubes(HNTs)have the advantages of toughness,low cost,high specific surface area,good biocompatibility,and environmental friendliness.It is widely used in cosmetics,drug slow-release,water treatment,and other fields.In this study,RSF was modified by the addition of HNTs to prepare HNTs/RSF composite films with high adsorption and excellent mechanical properties as a potential biosorbent carrier for dye wastewater treatment.In this paper,a series of HNTs/RSF composite films were prepared by the coasting method by blending HNTs with RSF solution at mass fractions of 5%,10%,15%,20%,25%,and 30%,respectively.The effects of different mass fractions of HNTs on the microscopic morphology,secondary structure,crystal structure,thermal stability,and mechanical properties of the RSF films were investigated.With the elongation at the break of the composite membrane as a reference index,the 25%-HNTs/RSF compo
作者
王津津
李慧慧
郭建军
蒋蕾
李航
武国华
WANG Jinjin;LI Huihui;GUO Jianjun;JIANG Lei;LI Hang;WU Guohua(College of Biotechnology,Jiangsu University of Science and Technology,Zhenjiang 212100,China;College of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China;College of Agriculture,Anshun University,Anshun 561000,China)
出处
《丝绸》
CAS
CSCD
北大核心
2022年第6期34-43,共10页
Journal of Silk
基金
江苏省特聘教授专项基金项目(苏教师〔2015〕17号)
国家特种农产品质量安全风险评价项目(GPFP1801003)。
关键词
再生丝素蛋白
埃洛石纳米管
共混改性
力学性能
亚甲基蓝
吸附
regenerated silk fibroin
halloysite nanotubes
blend modification
mechanical properties
methylene blue
adsorption
