壳聚糖/纤维素气凝胶球的制备及其甲醛吸附性能

doi:10.3969/j.issn.0253-2417.2017.01.004

林产化学与工业 ›› 2017, Vol. 37 ›› Issue (1): 27-35.doi: 10.3969/j.issn.0253-2417.2017.01.004

壳聚糖/纤维素气凝胶球的制备及其甲醛吸附性能

刘志明¹, 吴鹏^1,2

1. 东北林业大学材料科学与工程学院, 黑龙江哈尔滨 150040;
2. 汉中职业技术学院药学与医学技术系, 陕西汉中 723000

收稿日期:2016-05-26 出版日期:2017-02-25 发布日期:2017-02-25
作者简介:刘志明(1971-),男,黑龙江明水人,教授,博士,博士生导师,主要从事生物质材料化学、纤维素气凝胶和纳米纤维素、木质素及其复合功能材料的研究;E-mail:zhimingliuwhy@126.com
基金资助:
林业公益性行业科研专项（201504602-5）；黑龙江省自然科学基金项目（C2015055）；浙江省林业工程重中之重一级学科开放基金重点项目（2014lygcz002）

Preparation of Chitosan/Cellulose Aerogel Beads and Its Formaldehyde Gas Adsorption Performance

LIU Zhiming¹, WU Peng^1,2

1. Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China;
2. Department of Pharmacy and Medical Technology, Hanzhong Vocational Technical College, Hanzhong 723000, China

Received:2016-05-26 Online:2017-02-25 Published:2017-02-25

摘要/Abstract

摘要： 采用液滴悬浮凝胶法分别制备纤维素气凝胶球（CAB）和壳聚糖/纤维素气凝胶球（CCAB），再经酸处理过程分别制得酸处理的CAB（CAB-A）和酸处理的CCAB（CCAB-A），并通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）、X光电子能谱（XPS）和比表面积孔隙测定仪等检测手段对复合气凝胶球的形貌、化学态、表面元素分布以及孔隙结构进行了分析。同时，通过气态甲醛吸附试验对样品的甲醛吸附性能进行测定。结果表明：该法制备的壳聚糖/纤维素复合气凝胶具有均匀的球形形态，CAB、CAB-A、CCAB和CCAB-A的平均粒径分别为（2.67±0.01）、（2.47±0.02）、（2.79±0.05）和（3.34±0.05）mm。壳聚糖引入到纤维素基体中没有发生化学变化，并且通过酸处理使壳聚糖分子在纤维素凝胶网络中进行了重新分布和组装，形成更为密集的气凝胶网状结构，产生了更为丰富的孔隙结构，CCAB-A的比表面积和介孔体积分别为1 350.7 m²/g和4.511 cm³/g。气态甲醛吸附测试结果表明：CCAB-A复合气凝胶球吸附1 h的吸附量高达1.99 mmol/g，远远大于相同用量的椰壳活性炭材料的甲醛吸附量0.39 mmol/g，并且与甲醛分子之间形成了稳定的甲亚胺和席夫碱的化学结合。

关键词: 纤维素, 壳聚糖, 气凝胶球, 吸附, 甲醛

Abstract: Cellulose aerogel beads(CAB) and chitosan/cellulose aerogel beads(CCAB) were prepared through droplet-suspension gelation processing,and then the acid treated CAB(CAB-A) and acid treated CCAB(CCAB-A) were obtained through acetic acid post-processing from CAB and CCAB. Morphologies,chemical states,element distributions and pore structures of the aerogel beads were characterized and analyzed by SEM,FT-IR,XPS and BET. Meanwhile,formaldehyde adsorption performances of the aerogel beads were measured by gaseous formaldehyde adsorption test. The results showed that the prepared aerogels had uniform spherical shape,and the average particle sizes of CAB, CAB-A,CCAB and CCAB-A were (2.67±0.01), (2.47±0.02), (2.79±0.05) and (3.34±0.05) mm, respectively. Chitosan molecules were introduced into the cellulose matrix and no significant chemical changes occurred during the preparation. In addition,chitosan molecules by acid treatment were renewably distributed and self-assembled in the network of cellulose gel, formed more intensive aerogel network structure,and provided abundant pore structure with the specific surface area and mesoporous volume of CCAB-A of 1 350.7 m²/g and 4.511 cm³/g,respectively. Thus the adsorbing capacity of the composite aerogel beads reached up to 1.99 mmol/g after adsorption for 1 h which was far greater than that by coconut shell activated carbon material with same dosage (0.39 mmol/g). The chemical combination of azomethine and schiff base was formed between primary amine and formaldehyde molecule in the aerogel beads.

Key words: cellulose, chitosan, aerogel beads, adsorption, formaldehyde

中图分类号:

TQ35

刘志明, 吴鹏. 壳聚糖/纤维素气凝胶球的制备及其甲醛吸附性能[J]. 林产化学与工业, 2017, 37(1): 27-35.

LIU Zhiming, WU Peng. Preparation of Chitosan/Cellulose Aerogel Beads and Its Formaldehyde Gas Adsorption Performance[J]. Chemistry and Industry of Forest Products, 2017, 37(1): 27-35.

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壳聚糖/纤维素气凝胶球的制备及其甲醛吸附性能

Preparation of Chitosan/Cellulose Aerogel Beads and Its Formaldehyde Gas Adsorption Performance

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