Ag2O/再生纤维素球形气凝胶的性能表征

doi:10.3969/j.issn.0253-2417.2016.03.005

林产化学与工业 ›› 2016, Vol. 36 ›› Issue (3): 29-35.doi: 10.3969/j.issn.0253-2417.2016.03.005

Ag₂O/再生纤维素球形气凝胶的性能表征

吴鹏, 刘志明, 彭涛, 王钰

东北林业大学材料科学与工程学院, 黑龙江哈尔滨 150040

收稿日期:2015-05-06 出版日期:2016-06-25 发布日期:2016-07-07
通讯作者: 刘志明,教授,博士生导师,博士,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研究;E-mail:zhimingliuwhy@126.com。 E-mail:zhimingliuwhy@126.com
作者简介:吴鹏(1987-),男,河南洛阳人,博士生,主要从事纤维素气凝胶和纳米纤维素复合材料研究
基金资助:
中央高校基本科研业务费专项资金项目资助(2572014AB20,2572014EB01-02);国家自然科学基金项目资助(31070633)

Performance Characterization of Ag₂O/Regenerated Cellulose Spherical Aerogel

WU Peng, LIU Zhi-ming, PENG Tao, WANG Yu

College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China

Received:2015-05-06 Online:2016-06-25 Published:2016-07-07

摘要/Abstract

摘要： 为了探讨再生纤维素气凝胶对碘蒸气的吸附去除能力,用天然竹纤维制备再生纤维素球形气凝胶(RCSA),然后通过银氨络离子在纤维素表面的吸附和反应,得到Ag₂O/再生纤维素球形复合气凝胶(Ag₂O/RCSA),以 ¹²⁷I作为放射性 ¹³¹I的同位素研究了复合气凝胶对碘的吸附。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)和BET比表面积等检测手段对制备的Ag₂O/RCSA样品的形貌、晶型、孔隙结构和碘吸附性能进行了表征。研究结果表明:纳米Ag₂O粒子的引入使RCSA颜色由白色变为棕色,RCSA原始的三维网结构没有发生变化;纳米Ag₂O粒子均匀分布在纤维素骨架中,并与纤维素紧密结合;Ag₂O/RCSA与RCSA一样都表现为Ⅳ型吸附/脱附等温线,BET比表面积、BJH孔体积比RCSA明显减小,平均孔径大小变化不大;Ag₂O/RCSA对碘蒸气的吸附是气凝胶孔隙的物理吸附和Ag₂O转变为AgI的化学吸附共同作用,总吸附量为87.8 mg/g。

关键词: 纤维素, 气凝胶, Ag₂O, 碘吸附性能

Abstract: In order to investigate the adsorption ability of regenerated cellulose aerogel to iodine vapor, regenerated cellulose spherical aerogels(RCSA) were prepared from natural bamboo fibers and then Ag₂O/RCSA were fabricated by adsorption and reaction of ammine silver complex ion on the surface of cellulose. In addition, the adsorption ability to iodine was studied by taking ¹²⁷I as the radioisotope of ¹³¹I. The morphology, crystal form and pore structure of Ag₂O/RCSA were characterized and analyzed by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD) and BET specific surface area. The results showed that the color of RCSA turned from white to brown with the appending of Ag₂O nanoparticles, but the original three-dimensional network structure cellulose aerogels didn't change. Ag₂O nanoparticles uniformly distributed in the cellulose backbone and closely combined with cellulose. Both N₂ adsorption and desorption isotherms of RCSA and Ag₂O/RCSA exhibited the characteristics of type Ⅳ isotherms. The BET specific surface area and BJH pore volume of Ag₂O/RCSA decreased obviously compared with those of RCSA, and there was little change in the size of the average pore diameter. The adsorption of Ag₂O/RCSA to iodine vapor was physical adsorption by porous aerogel and chemical adsorption by turning Ag₂O into AgI, and the total iodine vapor adsorption capacity of Ag₂O/RCSA was 87.8 mg/g.

Key words: cellulose, aerogel, Ag₂O, iodine adsorption properties

中图分类号:

TQ35
O636.2

吴鹏, 刘志明, 彭涛, 王钰. Ag₂O/再生纤维素球形气凝胶的性能表征[J]. 林产化学与工业, 2016, 36(3): 29-35.

WU Peng, LIU Zhi-ming, PENG Tao, WANG Yu. Performance Characterization of Ag₂O/Regenerated Cellulose Spherical Aerogel[J]. Chemistry and Industry of Forest Products, 2016, 36(3): 29-35.

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Ag₂O/再生纤维素球形气凝胶的性能表征

Performance Characterization of Ag₂O/Regenerated Cellulose Spherical Aerogel

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