海藻酸酰胺衍生物改性二氧化硅纳米粒及其Pickering乳液的制备
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- 论文作者：颜慧琼 ; 陈秀琼 ; 史载峰 ; 王向辉 ; 张小朋 ; 宋煌旺 ; 林强
- 年：2016
- 作者机构：海南省水环境污染治理与资源化重点实验室 海南师范大学化学与化工学院;
- 论文关键词：Ugi多组分反应 ; 二氧化硅纳米粒 ; 两亲性 ; Pickering乳液 ; 海藻酸酰胺衍生物
- 会议召开时间：2016-10-14
- 会议录名称：2016中国环境科学学会学术年会论文集（第四卷）
- 语种：中文
- 分类号：TQ127.2;O648.23
- 学会代码：HJKP
- 会议名称：中国环境科学学会2016年学术年会
- 会议地点：中国海南海口
- 主办单位：中国环境科学学会
- 学会名称：中国环境科学学会
- 页数：8
- 文件大小：1369k
- 原文格式：O
- 会议级别：全国
摘要
为了减少传统农药剂型的使用量,开发一种对环境无污染,成本低廉的农药新剂型,采用海藻酸酰胺衍生物通过Ugi多组分反应制备了新颖的聚合物-二氧化硅(Oct-Alg-SiO_2)纳米粒。以10%的液体石蜡为油相,通过高速搅拌制得O/W型Pickering乳液。通过氢核磁共振波谱(~1H NMR)和X光电子能谱(XPS)对Oct-Alg-SiO_2的结构和表面元素组分进行了表征。并且采用透射电子显微镜(TEM),Zeta电位和激光粒度分析仪对Oct-Alg-SiO_2的形貌、粒径和胶体性能进行了探索。结果表明,通过Ugi反应成功地合成了Oct-Alg-SiO_2纳米粒。海藻酸酰胺衍生物共价接枝到氨基二氧化硅(SiO_2-NH_2)纳米粒的表面,提高其平均直径,调控了其ζ电位,在水介质中能够表现出良好的分散稳定性。Oct-Alg-SiO_2在油水界面能够形成液滴粒径为5.7μm的稳定的Pickering乳液。随着水相pH值的增大,乳液体积分数增大,稳定性增强。Oct-Alg-SiO_2纳米粒将SiO_2纳米粒优异的胶体性能和海藻酸天然的无毒和可降解性能结合起来,在环保型农药的应用领域展现了极大的潜能。
引文
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[14]Wen C,Yuan Q,Liang H,et al.Preparation and stabilization of d-limonene Pickering emulsions bycellulose nanocrystals[J].Carbohyd Polym,2014,112;695-700.
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[2]Pickering S U.Emulsions[J].J Chem Soc Trans,1907,91:2001-2021.
[3]Binks B P,Rodrigues J A.Influence of surfactant structure on the double inversion of emulsions in the presence of nanoparticles[J].Colloids Surf A,2009,345-195-201.
[4]Binks B P,Rodrigues J A.Double inversion of emulsions by using nanoparticles and di-chain surfactant[J].Angew Chem Int Ed,2007,46.5389-5392.
[5]Fernandez Perez M,Gonzalez Pradas E,Urena Amate M D,et al.Controlled release of imidacloprid from alignin matrix;water release and mobility study[J].Journal of Agriculture and Food Chemistry,1998,46;3826-3834.
[6]Cao Y S,Huang L,Chen J X,et al.Development of a controlled release formulation based on a starch matrix system[J].Int J Pharm,2005,298(1):108-116.
[7]Stober W,FINK A,BOHN E.Controlled growth of monodisperse silica spheres in the micron size range[J].J Colloid Interf Sci,1968,26(1):62-66.
[8]Chen X Q,Yan H Q,Sun W,et al.Synthesis of amphiphilic alginate derivatives and electrospinning blend nanofibers:a novel hydrophobic drug carrier[J].Polym Bull,2015,72;3097-3117.
[9]Kovalenko I,Zdyrko B,Magasinski A,et al.A major constituent of brown algae for use in high-capacity Li-ion batteries[J].Science,2011,334:75-79.
[10]Ugi D D L The a-addition of immonium ions and anions to isonitriles accompanied by secondary reactions[J].Angewandte Chemie International Edition in English,1962,1(1):8-21.
[11]Yan H Q,Chen X Q,Li J C,et al.Synthesis of alginate derivative via the Ugi reaction and its characterization[J].Carbohyd Polym,2016,136:757-763.
[12]Binks B P,Rodrigues J A.Synergistic interaction in emulsions stabilized by a mixture of silica nanoparticles and cationic surfactant[J].Langmuir,2007,23:3626-3636
[13]颜慧琼,李嘉诚,冯玉红,等.改性海藻酸钠活化SiO_2纳米粒子稳定载药Picketing乳液及释药性[J].高等学校化学学报,2013,34(9):2164-2170.
[14]Wen C,Yuan Q,Liang H,et al.Preparation and stabilization of d-limonene Pickering emulsions bycellulose nanocrystals[J].Carbohyd Polym,2014,112;695-700.
[15]Bink B P,Rodrigues J A.Inversion of emulsions stabilized solely by ionizable nanoparticles[J].Angew Chem Int Edit,2005,44(3):441-444.