为拓展碳纳米纤维在环境清洁领域的应用,提高碳纳米纤维的水接触角,改善膜表面的疏水性能,获得疏水性较好的碳纳米纤维薄膜,利用静电纺丝法将纳米纤维素(CNFs)与碳纳米纤维前驱体复合,获得具有低表面能和良好疏水性能的纳米碳纤维/纳米纤维素复合纤维膜。通过对纳米纤维素含量进行调控,经预氧化和碳化处理后得到一系列具有规则三维空间网络结构的复合纤维膜,并探究不同纳米纤维素含量对复合纤维膜疏水性能的影响。结果表明:纳米纤维素修饰复合纤维膜随着碳化程度的提高其表面能呈现逐渐降低的趋势,其对水的接触角也逐渐增大,疏水效果得到较大幅度提升。随着纳米纤维素含量继续增加,复合纤维膜的水接触角呈上升趋势,未添加前接触角为36.13°,当纳米纤维素添加质量为20％时,水接触角最大为132.14°,提高了366%。
In order to expand the application of carbon nanofibers in the field of environmental cleaning,increase the water contact angle of carbon nanofibers,improve the hydrophobic properties of the membrane surface,and obtain a carbon nanofiber film with better hydrophobicity,the electrospinning method was used to compound nanocellulose (CNFs) with carbon nanofiber precursor and obtain carbon nanofiber/cellulose composite fiber membrane with low surface energy and good hydrophobic properties.By adjusting the content of nanocellulose,a series of composite fiber membranes with a regular three-dimensional spatial network structure were obtained after pre-oxidation and carbonization treatment,and the influence of different nanocellulose content on the hydrophobic properties of composite fiber membranes was explored.The results showed that the surface energy of nanocellulose modified composite fiber membranes gradually decreased with the increase of carbonization degree,and its contact angle to water gradually increased,and the hydrophobic effect was greatly improved.As the content of nanocellulose continued to increase,the water contact angle of the composite fiber membrane showed an upward trend,and the contact angle before the addition was 36.13°.When the amount of nanocellulose added was 20wt%,the maximum water contact angle was 132.14°,which was 366% higher than that of pure carbon nanofibers.
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基金资助
国家自然科学基金(51962029);内蒙古自治区科技计划项目(2019GG265);内蒙古农业大学高层次人才启动项目(NDGCC2016-20);内蒙古自治区高等学校“青年科技英才支持计划”项目(NJYT-19-A08);内蒙古自治区“草原英才”工程青年创新创业人才项目(内人社办函[2022]274号);内蒙古自治区重大专项(2020ZD0024);内蒙古自然科学基金——杰出青年科学基金(2022JQ08)
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