香蕉茎秆纤维提取工艺优化及其表征  

Optimization of Extraction Process of Banana Pseudostem Fibers and Its Characterization

作　　者：于昕樱 李英教 徐树英[1,2] YU Xinying;LI Yingjiao;XU Shuying(Key Laboratory of Solid Waste Resource Utilization and Environmental Protection of Haikou City,Hainan University,Haikou 570228,China;School of Chemistry and Chemical Engineering,Hainan University,Haikou 570228,China)

机构地区：[1]海南大学海口市固废物资源利用及环境保护重点实验室,海南海口570228 [2]海南大学化学化工学院,海南海口570228

出　　处：《生物质化学工程》2024年第2期31-38,共8页Biomass Chemical Engineering

基　　金：海南省自然科学基金高层次人才项目(521RC500)。

摘　　要：为了对农业废弃物香蕉茎秆进行综合利用,采用化学法脱胶工艺提取香蕉茎秆纤维。在单因素试验基础上,采用响应曲面法,以NaOH质量浓度、碱煮时间、碱煮温度为影响因素,以香蕉茎秆纤维的拉伸强度为响应值建立二次回归方程,通过响应面分析得到其优化组合。结果表明:碱煮时间对香蕉茎秆纤维拉伸强度的影响最大,其次为NaOH质量浓度,最后为碱煮温度。当NaOH质量浓度8.76 g/L,碱煮时间3.98 h,碱煮温度80.72℃,料液比1∶20(g∶mL)时,香蕉茎秆纤维的脱胶率为82.4%,含纤维素67.69%,拉伸强度为433.93 MPa。傅里叶红外结果显示较佳工艺制备的香蕉茎秆纤维去除了大量半纤维素和木质素。扫描电镜图显示香蕉茎秆纤维的断裂截面呈现脆性-塑性复合型断裂形式。In order to make comprehensive utilization of agricultural waste banana stalk,the banana stalk fiber was extracted by chemical degumming process.On the basis of single factor test,the response surface method was used to establish quadratic regression equation with NaOH mass concentration,alkali cooking time and alkali cooking temperature as the influencing factors,and the tensile strength of banana stem fiber as the response value.The optimal combination was obtained by response surface analysis.The results showed that alkali cooking time had the greatest effect on the tensile strength of banana stem fiber,followed by NaOH mass concentration and finally the alkali cooking temperature.When the mass concentration of NaOH was 8.76 g/L,the alkali boiling time was 3.98 h,the alkali boiling temperature was 80.72℃,the ratio of solid to liquid was 1∶20(g∶mL),the degumming rate of banana stalk fiber was 82.4%,the cellulose was 67.69%,and the tensile strength was 433.93 MPa.Fourier transform infrared results showed that a large amount of hemicellulose and lignin were removed from banana stem fiber prepared by optimal conditions.Scanning electron microscopy showed that the fracture section of banana stem fiber showed a brittle-plastic composite fracture form.

关 键 词：香蕉茎秆纤维 响应面法 脱胶率 机械性能 

分 类 号：TQ35[化学工程]