CAJ | 학술논문

为减少丙草胺的用量及其对环境的影响，以十二烷基三甲基氯化铵（ DTMAC）改性有机膨润土为载体制备丙草胺缓释剂，利用傅立叶红外光谱和X-射线衍射分析了有机膨润土的结构变化，并分析丙草胺在有机膨润土上的等温吸附对其释放动力学的影响。结果表明，DTMAC改性有机膨润土对丙草胺具有良好的吸附能力，并减低其在水中的释放速率。在丙草胺吸附和释放过程中疏水相互作用起关键作用，增加改性剂载量有助于增强膨润土的疏水性及其对丙草胺的吸附能力，从而获得更好的缓释效果。50％的丙草胺从DTMAC用量为可交换阳离子总量的60％、80％、100％和120％的有机膨润土的释放时间T50分别为2.05、2.07、2.97、4.26 d，其与丙草胺在相应有机膨润土上吸附的Freundlich系数Kf存在良好的线性函数关系。
위감소병초알적용량급기대배경적영향，이십이완기삼갑기록화안（ DTMAC）개성유궤팽윤토위재체제비병초알완석제，이용부립협홍외광보화X-사선연사분석료유궤팽윤토적결구변화，병분석병초알재유궤팽윤토상적등온흡부대기석방동역학적영향。결과표명，DTMAC개성유궤팽윤토대병초알구유량호적흡부능력，병감저기재수중적석방속솔。재병초알흡부화석방과정중소수상호작용기관건작용，증가개성제재량유조우증강팽윤토적소수성급기대병초알적흡부능력，종이획득경호적완석효과。50％적병초알종DTMAC용량위가교환양리자총량적60％、80％、100％화120％적유궤팽윤토적석방시간T50분별위2.05、2.07、2.97、4.26 d，기여병초알재상응유궤팽윤토상흡부적Freundlich계수Kf존재량호적선성함수관계。
To reduce the usage amount and the impact on the environment, organobentonites modi-fied with different loading levels of dodecyltrimethylammonium chloride ( DTMAC ) were prepared and used as matrix of controlled release formulation of pretilachlor.The structure of organobentonites was characterized by FTIR and XRD, and the sorption towards pretilachlor was investigated.The re-sults were utilized to reveal the effects of organobentonites on the release of pretilachlor.It was shown that organobentonites were of excellent sorption capacity towards pretilachlor and greatly reduced its release in water.The results indicated that hydrophobic interaction played a key roll in the sorption and sustained release of pretilachlor, of which an enhancement could be achieved by increasing the loading level of modifying agent.The time taken for 50% of active ingredient to be released, T50 , from organobentonites with DTMAC loading of 60%, 80%, 100%and 120%of the cation exchange capacity were found to be 2.05, 2.07, 2.97 and 4.26 d, exhibiting excellent linear relationship with the sorption coefficient Kf from Freundlich equation.