海藻酸钠/纤维素复合微球的制备及性能表征

doi:10.3969/j.issn.0253-2417.2019.02.010

林产化学与工业 ›› 2019, Vol. 39 ›› Issue (2): 67-72.doi: 10.3969/j.issn.0253-2417.2019.02.010

海藻酸钠/纤维素复合微球的制备及性能表征

李延庆,刘志明*(),程小凯,曹梦楠,王佳楠

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:2018-09-14 出版日期:2019-04-25 发布日期:2019-05-08
通讯作者: 刘志明 E-mail:zhimingliuwhy@126.com
作者简介:李延庆(1992—)，男，湖北荆门人，硕士生，主要从事纤维素复合材料研究
基金资助:
“十三五”国家重点研发计划资助(2017YFD0601004)

Preparation and Performance Characterization of Sodium Alginate/Cellulose Composite Microspheres

Yanqing LI,Zhiming LIU*(),Xiaokai CHENG,Mengnan CAO,Jianan WANG

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

Received:2018-09-14 Online:2019-04-25 Published:2019-05-08
Contact: Zhiming LIU E-mail:zhimingliuwhy@126.com
Supported by:
“十三五”国家重点研发计划资助(2017YFD0601004)

摘要/Abstract

摘要：

以短绒棉浆为原料，在NaOH/尿素溶剂体系中将纤维素与海藻酸钠按比例混合，采用溶胶凝胶转相法制备系列海藻酸钠/纤维素复合微球(SACCM)，并探讨了SACCM对水相中磷酸根离子的吸附能力。采用扫描电子显微镜(SEM)、傅里叶变换红外光谱(FT-IR)和激光粒度分析仪等对复合微球的结构和性能进行了分析。研究结果表明：系列复合微球均成球形，平均粒径约为360 μm，微球均表现为具孔的三维网状结构，孔径2~5 μm；通过FT-IR谱图可以看出，纤维素未与海藻酸钠发生化学反应，而是通过物理复合成球。吸附实验结果表明：复合微球对水相中磷酸根均具有较强的吸附性能，且吸附能力随着海藻酸钠质量分数的增加而变强，当海藻酸钠质量分数20%(SACCM20)时，对磷酸根的吸附性能最强，吸附效率可达到85.58%。

关键词: 纤维素微球, 海藻酸钠, 吸附剂, 磷酸根

Abstract:

The cellulose solutions were prepared with the cotton linter pulp dissolved in NaOH/urea aqueous system at low temperature and mixed with sodium alginate for the preparation of sodium alginate/cellulose composite micropheres(SACCM) by sol-gel transition. Then a series of SACCM, which could be preserved in water phase, were prepared by turning the ratio of cellulose and sodium alginate. The structure and properties of the microspheres were characterized by scanning electron microscopy(SEM), Fourier transform infrared spectrometer(FT-IR) and laser particle size analyzer. And the adsorption ability of the sodium alginate/cellulose composite microspheres to phosphate in water phase were evaluated. The results showed that all the composite microspheres were spherical with the average diameter of about 360 μm, and the microspheres exhibited three-dimensional network porous structure. FT-IR spectra showed that cellulose and sodium alginate were physically combined through hydrogen bonding and intermolecular interaction. The results of adsorption experiments showed that these composite microspheres had a strong adsorption capacity for phosphate in aqueous phase, and the adsorption capacity of phosphate on the composite microspheres increased with the increase of sodium alginate content. Among them, SACCM20 (mass fraction of sodium alginate 20%) had the strongest adsorption capacity for phosphate, and the adsorption efficiency could reach 85.58%.

Key words: cellulose microspheres, sodium alginate, adsorbent, phosphate radical

中图分类号:

TQ35

李延庆,刘志明,程小凯,曹梦楠,王佳楠. 海藻酸钠/纤维素复合微球的制备及性能表征[J]. 林产化学与工业, 2019, 39(2): 67-72.

Yanqing LI,Zhiming LIU,Xiaokai CHENG,Mengnan CAO,Jianan WANG. Preparation and Performance Characterization of Sodium Alginate/Cellulose Composite Microspheres[J]. Chemistry and Industry of Forest Products, 2019, 39(2): 67-72.

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样品 samples	A	C_e/(mg·L^-1)	m/mg	q_e/(mg·g^-1)	η/%
SACCM0	0.228	1.1664	0.1150	0.9958	76.67
SACCM10	0.199	0.9736	0.1208	1.0492	80.53
SACCM20	0.161	0.7210	0.1284	1.0994	85.58

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海藻酸钠/纤维素复合微球的制备及性能表征

Preparation and Performance Characterization of Sodium Alginate/Cellulose Composite Microspheres

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