海藻酸钠衍生物对水乳液在靶标表面行为的影响
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摘要
采用反相乳化法制备了以烷基糖苷(APG)为乳化剂的高效氯氟氰菊酯水乳液。测定了药液的动、静态表面张力、接触角以及在香蕉叶片上的持留量和药物吸附量,考察了胆固醇改性海藻酸钠衍生物(CSAD)对载药水乳液在叶片上的润湿性和沉积量的影响。结果表明:室温下,CSAD+APG体系和APG单独体系稳定的水乳液中表面活性剂(APG)的临界胶束质量浓度均为0.1 g/L。当ρAPG=0.1 g/L时,两种体系药液的最大持留量分别为0.010 4和0.007 8 g/cm2,粘附张力分别为24.32和16.14 m N/m,粘附功分别为55.23和46.47 m N/m;在叶片上的药物吸附量分别为524和412μg/L。由此推断:两亲性嵌段聚合物CSAD是通过疏水作用与APG形成混合胶束吸附在固液界面,其有效地提高了药液在叶片上的持留量和药物吸附量。
The cyhalothrin water emulsion containing cholesteryl grafted sodium alginate derivative(CSAD) was prepared via an inverse emulsion method by using nonionic surfactant alkyl polyglycosides(APG) as an emulsifier. And its dynamic and static surface tension,contact angle,retention and pesticide adsorption capacity was measured. Subsequently,the influence of CSAD on the wettability and deposition capacity of cyhalothrin in water emulsion on the banana leaf surface was investigated The results showed that the critical micelle concentration of APG(ρAPG) in the CSAD + APG system and the APG system stable water emulsion was both 0. 1 g/L at room temperature. In addition,for the above two systems,when the ρAPGwas 0. 1 g/L,the maximum retention on leaves was 0. 010 4 and0. 007 8 g/cm2,the adhesion tension was 24. 32 and 16. 14 m N/m,and the adhesion work was 55. 23 and 46. 47 m N/m,respectively. Furthermore,the CSAD + APG system showed a much higher pesticide adsorption capacity on leaves(524 μg/L),while the corresponding value was only 412 μg/L for the APG system. In general,the addition of the amphiphilic CSAD could effectively enhance the retention and adsorption capacity of water emulsion on banana leaves due to the formation of CSAD-APG complexes adsorbed at the solid-liquid interface.
The cyhalothrin water emulsion containing cholesteryl grafted sodium alginate derivative(CSAD) was prepared via an inverse emulsion method by using nonionic surfactant alkyl polyglycosides(APG) as an emulsifier. And its dynamic and static surface tension,contact angle,retention and pesticide adsorption capacity was measured. Subsequently,the influence of CSAD on the wettability and deposition capacity of cyhalothrin in water emulsion on the banana leaf surface was investigated The results showed that the critical micelle concentration of APG(ρAPG) in the CSAD + APG system and the APG system stable water emulsion was both 0. 1 g/L at room temperature. In addition,for the above two systems,when the ρAPGwas 0. 1 g/L,the maximum retention on leaves was 0. 010 4 and0. 007 8 g/cm2,the adhesion tension was 24. 32 and 16. 14 m N/m,and the adhesion work was 55. 23 and 46. 47 m N/m,respectively. Furthermore,the CSAD + APG system showed a much higher pesticide adsorption capacity on leaves(524 μg/L),while the corresponding value was only 412 μg/L for the APG system. In general,the addition of the amphiphilic CSAD could effectively enhance the retention and adsorption capacity of water emulsion on banana leaves due to the formation of CSAD-APG complexes adsorbed at the solid-liquid interface.
引文
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[22]Yang L,Zhang B,Wen L,et al.Amphiphilic cholesteryl grafted sodium alginate derivative:Synthesis and self-assembly in aqueous solution[J].Carbohydrate Polymers,2007,68(2):218-225.
[23]Zhu Y Q,Yu C X,Li Y,et al.Research on the changes in wettability of rice(Oryza sativa.)leaf surfaces at different development stages using the OWRK method[J].Pest Management Science,2014,70(3):462-469.
[24]Wang Shujie(王淑杰),Zhang Wei(张伟),He Haibing(何海兵),et al.Effection of typical plants leaves on pesticide wetting speciality and retentivity[J].Journal of Jilin University(Engineering and Technology Edition)(吉林大学学报:工学版),2013,43(2):564-568.
[25]Zhou Z H,Zhang Q,Wang H Z,et al.Wettability of a PTFE surface by aqueous solutions of zwitterionic surfactants:Effect of molecular structure[J].Colloids&Surfaces A Physicochemical&Engineering Aspects,2016,489:370-377.
[2]Yuan Huizhu(袁会珠),Yang Daibin(杨代斌),Yan Xiaojing(闫晓静),et al.Pesticide efficiency and the way to optimize the spray application[J].Plant Protection(植物保护),2011,37(5):14-20.
[3]Hong Xiaoyan(洪晓燕),Zhang Tiandong(张天栋).Related factors analysis and improvement measures affecting the utilization of pesticides[J].Forest Pest and Disease(中国森林病虫),2010,29(5):41-43.
[4]FoquéD,Nuyttens D.Effects of nozzle type and spray angle on spray deposition in ivy pot plants[J].Pest Management Science,2011,67(2):199-208.
[5]Ramsey R J L,Hall J C.Effect of humectants on the uptake and efficacy of glufosinate in wild oat(Avena fatua)plants and isolated cuticles under dry conditions[J].Weed Science,2006,54(2):205-211.
[6]Lin H,Zhou H,Xu L,et al.Effect of surfactant concentration on the spreading properties of pesticide droplets on Eucalyptus leaves[J].Biosystems Engineering,2016,143:42-49.
[7]Spanoghe P,Schampheleire M D,Meeren P V D,et al.Influence of agricultural adjuvants on droplet spectra[J].Pest Management Science,2007,63(1):4-16.
[8]Gu Zhongyan(顾中言),Xu Guangchun(徐广春),Xu Dejin(徐德进),et al.Technical system for scientific reduction of pesticide use in rice field and its principle[J].Jiangsu Journal of Agricultural Sciences(江苏农业学报),2012,28(5):1016-1024.
[9]Gu Zhongyan(顾中言).Analysis of the relationship between hydrophilic or hydrophobic property of plant and action of pesticides solution on plants leaves[J].Jiangsu Journal of Agricultural Sciences(江苏农业学报),2009,25(2):276-281.
[10]Fan Peng(范鹏),Gu Zhongyan(顾中言),Xu Dejin(徐德进),et al.Action analysis of drops of emamection-benzoate microemulsion on rice leaf[J].Chinese Journal of Rice Sciences(中国水稻科学),2010,24(5):503-508.
[11]Gu Zhongyan(顾中言),Chen Mingliang(陈明亮),Xu Xiaolong(许小龙).Analysis of liquid action on cabbage leaf[J].Jiangsu Journal of Agricultural Sciences(江苏农业学报),2007,23(6):568-572.
[12]Fan Renjun(范仁俊),Zhang Xiaoxi(张晓曦),Zhou Lu(周璐),et al.Research on the wettability of peach leaf surfaces by OWRK method[J].Chinese Journal of Pesticide Science(农药学学报),2011,13(1):79-83.
[13]Liu Shuiwen(刘水文),Nie Baisheng(聂百胜).Study on measurement and calculation of critical surface tension of wetting coal with water[J].Coal Science and Technology(煤炭科学技术),2012,40(4):64-66.
[14]Zhu Difu,Li Xiao,Zhang Gang,et al.Mimicking the rice leaffrom ordered binary structures to anisotropic wettability[J].Langmuir,2010,26(17):14276-14283.
[15]Bormashenko E.Progress in understanding wetting transitions on rough surfaces[J].Advances in Colloid&Interface Science,2014,222:92-103.
[16]Maarseveen C V,Jetter R.Composition of the epicuticular and intracuticular wax layers on Kalanchoe daigremontiana(Hamlet et Perr.de la Bathie)leaves[J].Phytochemistry,2009,70(7):899-906.
[17]Taylor P.The wetting of leaf surfaces[J].Current Opinion in Colloid&Interface Science,2011,16(4):326-334.
[18]Dessouky W I E,Abbas R,Sadik W A,et al.Improved adhesion of superhydrophobic layer on metal surfaces via one step spraying method[J].Arabian Journal of Chemistry,DOI:10.1016/j.arabjc.2015.12.011.
[19]Xiong Chengjing(熊成晶),Yang Yan(杨妍),Shen Ganglin(沈刚林),et al.Improvement of adhesion of block polymer by RAFT polymerization to PP substrate coating[J].Functional Material(功能材料),2016,47(8):223-227.
[20]Wang Rui(王瑞),Li Jiacheng(李嘉诚),Feng Yuhong(冯玉红),et al.The influence of amphiphilic alginate derivate on the stability of the dispersion of Ti O2nanoparticle suspension system[J].Fine Chemicals(精细化工),2016,33(2):132-136.
[21]Wang Chunxiu(王春修),Feng Yuhong(冯玉红),Lin Qiang(林强),et al.Effect of amphiphilic cholesteryl grafted sodium alginate derivative on the stability of lambda-cyhalothrin in water emulsion[J].Chinese Journal of Pesticide Science(农药学学报),2015,17(2):208-214.
[22]Yang L,Zhang B,Wen L,et al.Amphiphilic cholesteryl grafted sodium alginate derivative:Synthesis and self-assembly in aqueous solution[J].Carbohydrate Polymers,2007,68(2):218-225.
[23]Zhu Y Q,Yu C X,Li Y,et al.Research on the changes in wettability of rice(Oryza sativa.)leaf surfaces at different development stages using the OWRK method[J].Pest Management Science,2014,70(3):462-469.
[24]Wang Shujie(王淑杰),Zhang Wei(张伟),He Haibing(何海兵),et al.Effection of typical plants leaves on pesticide wetting speciality and retentivity[J].Journal of Jilin University(Engineering and Technology Edition)(吉林大学学报:工学版),2013,43(2):564-568.
[25]Zhou Z H,Zhang Q,Wang H Z,et al.Wettability of a PTFE surface by aqueous solutions of zwitterionic surfactants:Effect of molecular structure[J].Colloids&Surfaces A Physicochemical&Engineering Aspects,2016,489:370-377.