CAJ | 학술논문

采用分步法制备了聚苯乙烯／银（PS／Ag）核壳结构复合纳米球。首先采用无皂乳液聚合法并利用丙烯酸（AA）的羧基对制备的PS球进行改性，使其表面带负电荷；然后通过静电吸附作用在改性PS球的表面沉积[Ag（NH3）2]^＋,水浴（80℃）环境中利用十二烷基磺酸钠（SDS）作为还原剂将PS球表面的[Ag（NH3）2]^＋还原，制备出PS／Ag核壳结构复合球。通过动态激光粒度分析仪和透射电子显微镜对PS／Ag核壳纳米球的粒度分布、形貌和结构进行了表征，研究了AA的用量对复合球粒径及包覆的Ag壳厚度的影响。结果表明，随着AA用量的增大，所包覆的银层更加致密，厚度增大，当AA用量为15％时可得到Ag完全包覆的PS／Ag复合纳米球。
채용분보법제비료취분을희／은（PS／Ag）핵각결구복합납미구。수선채용무조유액취합법병이용병희산（AA）적최기대제비적PS구진행개성，사기표면대부전하；연후통과정전흡부작용재개성PS구적표면침적[Ag（NH3）2]^＋,수욕（80℃）배경중이용십이완기광산납（SDS）작위환원제장PS구표면적[Ag（NH3）2]^＋환원，제비출PS／Ag핵각결구복합구。통과동태격광립도분석의화투사전자현미경대PS／Ag핵각납미구적립도분포、형모화결구진행료표정，연구료AA적용량대복합구립경급포복적Ag각후도적영향。결과표명，수착AA용량적증대，소포복적은층경가치밀，후도증대，당AA용량위15％시가득도Ag완전포복적PS／Ag복합납미구。
The core-shell PS/Ag composite nanospheres were synthesized via the method o亿 fractional steps. Firstly, the highly monodisperse PS nanospheres were prepared by taking the emulsifier-free emulsion polymerization approach, and the carboxyl group of acrylic acid was used to modify their surfaces to be surrounded with negative charges. Secondly, [Ag（NH3）2]^＋ was deposited on the modified surfaces of PS nanospheres and then was reduced with the SDS as the reducing agent in the water bath environment （80℃） so as to obtain the PS/Ag core-shell composite nanospheres. The particle size distribution, morphology and structure of the prepared core- shell PS/Ag composite nanospheres were chacacterized by using the dynamic light scattering and transmission election microscope. The influence of AA amount on the core-shell PS/Ag composite particle size and the coat of Ag shell thickness were investigated. It show that the Ag coating became more compact and thicker with the increase of AA amount. When AA came to 15%, the PS/Ag composite nanospheres with completely coated Ag were obtained.