|
|
- 2016
聚天冬氨酸/木质纤维素水凝胶的制备及吸附性能
|
Abstract:
采用水溶液聚合法合成聚天冬氨酸（PASP）/木质纤维素（LNC）水凝胶；考察了预处理时间、预处理温度、KMnO4浓度、戊二醛用量、PASP的用量、反应时间以及反应温度对PASP/LNC水凝胶吸附Pb2+、Cd2+性能的影响；运用Langmuir吸附等温线计算PASP/LNC水凝胶最大吸附量；使用HNO3对PASP/LNC水凝胶进行脱附再生实验；采用SEM和FTIR对水凝胶的结构进行表征。吸附结果表明：预处理时间15 min，预处理温度50 ℃、KMnO4浓度0.06 mol·L-1、戊二醛用量1.00 g、PASP用量11 g、反应时间3.5 h且反应温度70 ℃时，对Pb2+、Cd2+的平衡吸附容量分别为980.39 mg·g-1、813.01 mg·g-1。 吸附/脱附循环实验表明：循环吸附脱附4次后PASP/LNC水凝胶吸附量仍较高，PASP/LNC水凝胶是一种可循环利用的吸附剂。表征结果表明：PASP/LNC水凝胶的表面有大小不等的孔隙，PASP的—COOH与LNC的O—H发生缩聚反应，形成具有三维网络结构的水凝胶。 Polyaspartic acid(PASP)/lignocellulose (LNC) hydrogels were synthesized through aqueous polymerization method; the effects of pretreatment time, pretreatment temperature, KMnO4 concentration, glutaraldehyde amount, PASP amount, reaction time and reaction temperature on adsorption property of PASP/LNC hydrogels for Pb2+, Cd2+ were evaluated; the maximum adsorption capacity of PASP/LNC hydrogels was calculated by Langmuir adsorption isotherm; HNO3 was used to perform desorption and regeneration experiments of PASP/LNC hydrogels; the structure of the hydrogels was characterized by SEM and FTIR. The adsorption result shows that when the pretreatment time is 15 min, the pretreatment temperature is 50 ℃, the KMnO4 concentration is 0.06 mol·L-1, the glutaraldehyde amount is 1.00 g, the PASP amount is 11 g, the reaction time is 3.5 h and the reaction temperature is 70 ℃, the equilibrium adsorption capality for Pb2+, Cd2+ could reach 980.39 mg·g-1, 813.01 mg·g-1. The adsorption/desorption cycling experiment indicates that the adsorption capality of PASP/LNC hydrogels is ideal after four cycles of adsorption/desorption, so PASP/LNC hydrogels are confirmed as a adsorbent for recycling. The characterization results show that the surface of PASP/LNC hydrogels has gap of varying sizes, polycondensation reaction is developed between —COOH of PASP and O—H of LNC, which forms hydrogels of three-dimensional network structure. 内蒙古农业大学优秀青年科学基金（2014XYQ-12）
| [1] | LI J, CHEN C L, ZHANG S W, et al. Surface functional groups and defects on carbon nanotubes affect adsorption-desorption hysteresis of metal cations and oxoanions in water[J]. Environmental Science Nano, 2014, 1(5): 488-495. |
| [2] | 张俊, 毛彩红, 陈小玲, 等. 水体系中制备聚天冬氨酸高吸水性树脂的研究[J]. 塑料工业, 2013, 41(7): 13-16. ZANG J, MAO C H, CHEN X L, et al. Synthesis of poly (aspartic acid) superabsorbent polymer in aqueous solution[J]. China Plastics Industry, 2013, 41(7): 13-16 (in Chinese). |
| [3] | 赵彦生, 彭璐, 刘永梅, 等. 羟化聚天冬氨酸高吸水性树脂的制备及性能研究[J]. 化工新型材料, 2011, 39(10): 122-124. ZHAO Y S, PENG L, LIU Y M, et al. Synthesis and performance of polyaspartic acid superaborbent resin with hydroxyl[J]. New Chemical Materials, 2011, 39(10): 122-124 (in Chinese). |
| [4] | 谢水波, 罗景阳, 刘清, 等. 羧乙基纤维素/海藻酸钠复合膜对六价铀的吸附性能及吸附机制[J]. 复合材料学报, 2015, 32(1): 268-275. XIE S B, LUO J Y, LIU Q, et al. Adsorption characteristics and mechanism of hydroxyethyl cellulose/sodium alginate blend films for uranium(Ⅵ)[J]. Acta Materiae Compositae Sinica, 2015, 32(1): 268-275 (in Chinese). |
| [5] | LI J, ZHANG S W, CHEN C L, et al. Removal of Cu(II) and fulvic acid by graphene oxide nanosheets decorated with Fe3O4 nanoparticles[J]. ACS Applied Materials & Interface, 2012, 4(9): 4991-5000. |
| [6] | YANG S B, CHEN C L, CHEN Y, et al. Competitive adsorption of Pb (II) , Ni(II) , and Sr (II) ions on graphene oxides: A combined experimental and theoretical study[J]. Chempluschem Communications, 2015, 80(3): 480-484. |
| [7] | SHEN C C, CHEN C L, WEN T, et al. Superior adsorption capacity of g-C3N4 for heavy metal ions from aqueous solutions[J]. Journal of Colloid and Interface Science, 2015, 6(4): 7-14. |
| [8] | 史艳茹, 薛振华, 王喜明, 等. 木质纤维-g-丙烯酸/蒙脱土水凝胶制备及吸附性能研究[J]. 功能材料, 2013, 44(4): 502-506. SHI Y R, XUE Z H, WANG X M, et al. Prparation of lignocellulose-g-acrylic acid/montmorillonite hydrogels and its adsorption[J]. Journal of Functional Materials, 2013, 44(4): 502-506 (in Chinese). |
| [9] | KABIRI K, OMIDIAN H, ZOHURIAAN-MEHR M J, et al. Superabsorbent hydrogel composites and nanocomposites: A review[J]. Polymer Composites, 2011, 32(2): 277-289. |
| [10] | 关莹, 陈阁谷, 张冰, 等. 农林生物质材料基水凝胶的研究进展[J]. 林产化学与工业, 2015, 35(2): 171-176. GUAN Y, CHEN G G, ZHANG B, et al. Research progress in agricultural and forestal biomass-basesd hydrogel[J]. Chemistry and Industry of Forest Products, 2015, 35(2): 171-176 (in Chinese). |
| [11] | GAO D, HEIMANN R B, LERCHNER J, et al. Development of a novel moisture sensor based on superabsorbent poly (acrylamide) montmorillonite composite hydrogels[J]. Journal of Materials Science, 2001, 36(18): 4567-4571. |
| [12] | 靳久哲. 氯化镧改性木质纤维素基水凝胶对染料吸附/脱附性能的研究[D]. 呼和浩特: 内蒙古农业大学, 2015. JIN J Z. Research on adsorption/desorption properties of dys on LaCl3 modified lignocellulose based hydrogels[D]. Hohhot: Inner Mongolia Agricultural University, 2015 (in Chinese). |
| [13] | 梁蕊, 王晓燕, 席国喜. 新型pH敏感羧甲基壳聚糖-聚天冬氨酸水凝胶的制备及性能[J]. 化工新型材料, 2013, 11(6): 36-37. LIANG R, WANG X Y, XI G X. Preparation and properties of novel pH-sensitive CMCS/PASP hydrogel[J]. New Chemical Materials, 2013, 11(6): 36-37 (in Chinese). |
| [14] | CAO H, MA X Y, SUN S H, et al. A new photocrosslinkable hydrogel based on a derivative of polyaspartic acid for the controlled release of ketoprofen[J]. Polymer Bulletin, 2010, 64(6): 623-632. |
| [15] | YOSHIHIRO I, MAKOTO S. Production process of cross-linked polysuccinmide resin: US6346569[P]. 2002-01-12. |
| [16] | 黄继才, 齐庆惠, 高洁. 以高锰酸钾为引发剂的丙烯睛与木质纤维素接枝共聚的研究[J]. 化学通讯, 1987, 23(4): 31-32. HUANG J C, QI Q H, GAO J. Research in acrylonitrile gafted with lignocellulose using potassium permanganate as initiator[J]. Chemical Newsletter, 1987, 23(4): 31-32 (in Chinese). |
| [17] | 李贤真, 李彦锋, 朱晓夏, 等. 高分子水凝胶材料研究进展[J]. 功能材料, 2003, 34(4): 382-385. LI X Z, LI Y F, ZHU X X, et al. Study advances on polymeric hydrogels[J]. Journal of Functional Materials, 2003, 34(4): 382-385 (in Chinese). |
| [18] | 倪平. 改性柚皮纤维素的制备及其对金属离子Cd2+的吸附研究[D]. 武汉: 华中农业大学, 2011. NI P. Studies on the cadmium (II) adsorption of the modificaton of cellulose from pomelo peel[D]. Wuhan: Huazhong Agricultural University, 2011 (in Chinese). |
| [19] | MOSIG J, GOODING C H, WHEELER A P, et al. Characterization of the 130 hydrolys of polysuccinimide[J]. Separation of Science and Technology, 1997, 36(6): 2163-2170. |
| [20] | WANG Y M, XUE M Y, WEI J, et al. Novel solvent-free synthesis and modification of polyaspartic acid hydrogel[J]. RSC Advances, 2012, 2(30): 11592-11600. |
| [21] | 马娇娇, 谭天伟, 凌沛学. 聚天冬氨酸/海藻酸钠高吸水树脂的合成与评价[J]. 北京化工大学学报, 2010, 37(1): 98-101. MA J J, TAN T W, LING P X. Synthesis and evaluation of a high water-adsorption capacity resin composed of sodium alginate and polyaspartic acid[J]. Journal of Beijing University of Chemical Technology, 2010, 37(1): 98-101 (in Chinese). |
| [22] | 孙波, 米镇涛, 邵仕香, 等. 微波法合成聚天冬氨酸水凝胶及其对Pb2+的吸附性能[J]. 石油化工, 2004, 33(12): 1168-1172. SUN B, MI Z T, SHAO S X, et al. Preparation of polyaspartate hydrogel using microwave technique and its Pb2+-binding behavior[J]. Petrochemical Technology, 2004, 33(12): 1168-1172 (in Chinese). |
| [23] | 王利君, 韩卿, 谢益民. 不同引发剂体系对纤维素与己内酰胺接枝共聚的影响[J]. 中华纸业, 2010, 31(8): 46-49. WANG L J, HAN Q, XIE Y M. The effcet of different kinds of initiater systems on copolymerization of cellulose gafted with caprolactam[J]. China Pulp & Paper Industry, 2010, 31(8): 46-49 (in Chinese). |
| [24] | LI J, CHEN C L, ZHANG S W, et al. Critical evaluation of adsorption-desorption hysteresis of heavy metal ions from carbon nanotubes: Influence of wall number and surface functionalization[J]. Chemistry-An Asian Journal, 2014, 9(4): 1144-1151. |
| [25] | 张晓涛, 王喜明. 木质纤维素/纳米蒙脱土复合材料对废水中Cu(Ⅱ)的吸附及解吸[J]. 复合材料学报, 2015, 32(2): 385-394. ZHANG X T, WANG X M. Adsorption and desorption of Cu(Ⅱ) in wastewater by lignocelluloses/nano-montmorillonite composites[J]. Acta Materiae Compositae Sinica, 2015, 32(2): 385-394 (in Chinese). |
| [26] | 陈刚, 王丽. 木质纤维素基纳米复合材料对Pb2+、Cd2+的吸附研究[J]. 功能材料, 2014, 45(22): 22084-22090. CHEN G, WANG L. Adsorption of Pb2+ and Cd2+ from aqueous solutions by lignocellcelose-g-acrylicacid/acrylamide/montmorillonite nanocomposites[J]. Journal of Functional Materials, 2014, 45(22): 22084-22090 (in Chinese). |
| [27] | 杜敏. 木质纤维素基水凝胶对Pb2+和Cd2+吸附性能的研究[D]. 呼和浩特: 内蒙古农业大学, 2014. DU M. Research on adsorption properties of Pb2+ and Cd2+ on lignocellulose based hydrogels[D]. Hohhot: Inner Mongolia Agricultural University, 2014 (in Chinese). |
| [28] | 李如忠, 周爱佳, 童芳, 等. 合肥市城区地表灰尘重金属分布特征及环境健康风险评价[J]. 环境科学, 2011, 32(9): 2661-2668. LI R Z, ZHOU A J, TONG F, et al. Distribution of metals in urban dusts of hefei and health risk assessment[J]. Environmental Science, 2011, 32(9): 2661-2668 (in Chinese). |
