木薯淀粉水凝胶的制备及表征
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摘要
采用木薯淀粉接枝丙烯酰胺,以淀粉为骨架,接枝上丙烯酰胺支链,以期形成具有敏感性的空间网状大分子结构水凝胶。以木薯淀粉为原料,丙烯酰胺为单体,以N,N-亚甲基双丙烯酰胺为交联剂,过硫酸铵为引发剂,制备具有高溶胀性能的木薯淀粉基水凝胶,研究了水凝胶对温度pH的敏感特性。通过傅里叶红外光谱(FTIR)、场发射扫描电子显微镜(FE-SEM)、X-射线衍射仪(XRD)等现代分析测试手段对其进行表征。实验结果表明:当木薯淀粉用量为1 g,丙烯酰胺用量为5 g,N,N-亚甲基双丙烯酰胺为0.06 g,过硫酸铵0.03 g时,制得的木薯淀粉水凝胶吸水倍率较高。表征结果证明已成功制备木薯淀粉水凝胶。水凝胶溶胀平衡比会随着温度以及pH的改变而改变,溶胀比在35℃时达到最大,在pH为12.24碱性条件下溶胀性达到最高,表明制备的水凝胶具有温度与pH双敏感性。该水凝胶良好的溶胀性能可以使其用于重金属离子吸附、生物医药等领域,应用价值较高。
The cassava grafted acrylamide was used,and the starch was used as the backbone to graft the acrylamide branch to form a sensitive spatial network macromolecular structure hydrogel. The tapioca starch-based hydrogel with high swelling property was prepared by using cassava starch as raw material,acrylamide as monomer,N,N-methylenebisacrylamide as cross-linking agent and ammonium persulfate as initiator. The tapioca starch-based hydrogel with high swelling property was prepared,and the sensitivity of the hydrogel to temperature and pH was studied. It was characterized by fourier transform infrared spectroscopy (FTIR),field emission scanning electron microscopy (FE-SEM),X-ray diffractometry (XRD) and other modern analytical testing methods.The experimental results showed that when the amount of tapioca starch was 1 g,the amount of acrylamide was 5 g,N,N-methylenebisacrylamide was 0.06 g,and ammonium persulfate was 0.03 g,the prepared tapioca starch hydrogel had a high water absorption rate.The characterization results demonstrated that the tapioca starch hydrogel had been successfully prepared. The hydrogel swelling equilibrium ratio changes with temperature and pH change,the swelling property reached maximum at 35 ℃,and the swelling property reached the highest under the alkaline condition of pH 12.24,it was indicated that the prepared hydrogel had both temperature and pH sensitivity. The good swelling property of the hydrogel would be used in the fields of heavy metal ion adsorption,biomedicine,and the application value was high.
The cassava grafted acrylamide was used,and the starch was used as the backbone to graft the acrylamide branch to form a sensitive spatial network macromolecular structure hydrogel. The tapioca starch-based hydrogel with high swelling property was prepared by using cassava starch as raw material,acrylamide as monomer,N,N-methylenebisacrylamide as cross-linking agent and ammonium persulfate as initiator. The tapioca starch-based hydrogel with high swelling property was prepared,and the sensitivity of the hydrogel to temperature and pH was studied. It was characterized by fourier transform infrared spectroscopy (FTIR),field emission scanning electron microscopy (FE-SEM),X-ray diffractometry (XRD) and other modern analytical testing methods.The experimental results showed that when the amount of tapioca starch was 1 g,the amount of acrylamide was 5 g,N,N-methylenebisacrylamide was 0.06 g,and ammonium persulfate was 0.03 g,the prepared tapioca starch hydrogel had a high water absorption rate.The characterization results demonstrated that the tapioca starch hydrogel had been successfully prepared. The hydrogel swelling equilibrium ratio changes with temperature and pH change,the swelling property reached maximum at 35 ℃,and the swelling property reached the highest under the alkaline condition of pH 12.24,it was indicated that the prepared hydrogel had both temperature and pH sensitivity. The good swelling property of the hydrogel would be used in the fields of heavy metal ion adsorption,biomedicine,and the application value was high.
引文
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[2]王薇,关国平,王璐.生物医用水凝胶研究进展[J].生物医学工程学进展,2015,36(4):221-225.
[3]刘壮,谢锐,巨晓洁,等.环境刺激响应型高强度智能水凝胶研究进展[J].化工进展,2016,35(6):1812-1819.
[4]柴莉娜,张广成,孙伟民等.淀粉接枝丙烯酰胺的合成及其絮凝性能的研究[J].应用化工,2009,38(9):1313-1316.
[5]Sadrykia F,Arsalani N.Preparation and characterization of hydrogel nanocomposites based on oxidized starch and incompletely condensed polyhedral oligomeric silsesquioxanes[J].Procedia Materials Science,2015,11:531-535.
[6]刘继伟,谷长生,宋文东,等.木薯淀粉基质水凝胶的制备及溶胀性能研究[J].安徽农业科学,2010,38(14):7696-7697,7700.
[7]Namazi H,Dadkhah A.Convenient method for preparation of hydrophobically modified starch nanocrystals with using fatty acids[J].Carbohydrate Polymers,2010,79(3):731-737.
[8]乔冬玲.高浓度高剪切环境中淀粉基高吸水树脂的构建及性能研究[D].广州:华南理工学,2016.
[9]韦晓燕,谭军,欧阳玉霞,等.淀粉接枝丙烯酰胺吸附铜离子性能研究[J].工业水处理,2014,34(2):15-18.
[10]赵天勤,杜杰,张鹏,等.新型淀粉基p H敏感水凝胶的微波法合成及性能表征[J].化工新型材料,2013,41(11):108-110,117.
[11]陈兆伟,陈明清,刘晓亚,等.温敏性聚(N-异丙基丙烯酰胺)水凝胶的合成与表征[J].功能高分子学报,2004(1):46-50.
[12]Gao T,Wang W,Wang A.A p H-sensitive composite hydrogel based on sodium alginate and medical stone:Synthesis,swelling,and heavy metal ions adsorption properties[J].Macromolecular Research,2011,19(7):739-748.
[13]LW Pin,A Ashri,M A Bakar.Preparation and characterization of starch/acrylamide-based hydrogel from Stemona curtissi tuber[J].Malaysian Journal of Analytical Sciences,2016(14):157-170.
[14]Vakili M R,Rahneshin N.Synthesis and characterization of novel stimuli-responsive hydrogels based on starch and L-aspartic acid.[J].Carbohydrate Polymers,2013,98(2):1624-1630.
[15]Du J,Zhao T,Liu Y,et al.Synthesis and characterization of a novel starch-based p H-sensitive hydrogel[J].Applied Mechanics&Materials,2013,303-306:2602-2605.
[16]Yan Z,Gao P,Lin Z,et al.Preparation and swelling properties of a starch-g-poly(acrylic acid)/organo-mordenite hydrogel composite[J].Frontiers of Chemical Science and Engineering,2016,10(1):147-161.
[17]陈俊.基于聚(N,N-二乙基丙烯酰胺)的温度和p H敏感性水凝胶的合成及其性能研究[D].兰州:兰州大学,2010.
[18]Bai C,Zhang S,Huang L,et al.Starch-based hydrogel loading with carbendazim for controlled-release and water absorption.[J].Carbohydrate Polymers,2015,125:376-383.
[19]Soleyman R,Pourjavadi A,Monfared A,et al.Novel salepbased chelating hydrogel for heavy metal removal from aqueous solutions[J].Polymers for Advanced Technologies,2016,27(8):999-1005.
[20]刘子杰,梁兴唐,钟书明,等.微波合成淀粉基水凝胶的Pb2+吸附性能[J].精细化工,2016,33(10):1135-1140,1182.
[21]吴阳阳.多晶型药物结晶过程中的晶型转变与晶体提纯[D].上海:华东理工大学,2012.
[22]金海琴,张玉红,董勤政,等.壳聚糖接枝丙烯酸/丙烯酰胺水凝胶的制备及性能[J].高分子材料科学与工程,2009,25(11):129-132.
[23]尹大伟,周英,刘玉婷,等.水凝胶的最新研究进展[J].化工新型材料,2012,40(2):21-23,71.
[24]Qi C,An H,Jiang Y,et al.POEGMA hydrogel cross-linked by starch-based microspheres:Synthesis and characterization[J].Iranian Polymer Journal,2017,26(5):323-330.