林产化学与工业
林產化學與工業
림산화학여공업
Chemistry and Industry of Forest Products
2015年
5期
71-78
,共8页
三甲基木质素季铵盐%膨润土%吸附%恶霉灵%缓释
三甲基木質素季銨鹽%膨潤土%吸附%噁黴靈%緩釋
삼갑기목질소계안염%팽윤토%흡부%악매령%완석
lignin derived trimethyl quaternary ammonium salt%bentonite%adsorption%hymexazol%slow release
为提高木质素产品的附加值,以钠基膨润土为原料,三甲基木质素季铵盐( T-QL)为改性剂,制备了三甲基木质素季铵盐/膨润土( L-Bt)缓释剂;并以恶霉灵作为模拟农药,考察了L-Bt缓释剂对恶霉灵的吸附性能及缓释性能。利用FT-IR表征了其结构,采用XRD分析了改性后膨润土的底面间距。结果表明:季铵离子已成功负载到膨润土上;改性后的膨润土引起层间域的膨胀,层间距增大。改性膨润土缓释剂最佳制备工艺条件为:T-QL用量为膨润土阳离子交换容量0.8倍的改性膨润土(L-0.8Bt),L-0.8Bt的投加量为0.06 g,吸附时间10 h,恶霉灵初始质量浓度为500 mg/L,pH值为4时,其最大吸附量为281 mg/g。通过水溶缓释实验研究了药水比例和温度对载药量为281 mg/g 的L-0.8Bt缓释性能的影响,结果表明,随着药水比例的增加和温度的升高,其累计释药率均逐渐增加。
為提高木質素產品的附加值,以鈉基膨潤土為原料,三甲基木質素季銨鹽( T-QL)為改性劑,製備瞭三甲基木質素季銨鹽/膨潤土( L-Bt)緩釋劑;併以噁黴靈作為模擬農藥,攷察瞭L-Bt緩釋劑對噁黴靈的吸附性能及緩釋性能。利用FT-IR錶徵瞭其結構,採用XRD分析瞭改性後膨潤土的底麵間距。結果錶明:季銨離子已成功負載到膨潤土上;改性後的膨潤土引起層間域的膨脹,層間距增大。改性膨潤土緩釋劑最佳製備工藝條件為:T-QL用量為膨潤土暘離子交換容量0.8倍的改性膨潤土(L-0.8Bt),L-0.8Bt的投加量為0.06 g,吸附時間10 h,噁黴靈初始質量濃度為500 mg/L,pH值為4時,其最大吸附量為281 mg/g。通過水溶緩釋實驗研究瞭藥水比例和溫度對載藥量為281 mg/g 的L-0.8Bt緩釋性能的影響,結果錶明,隨著藥水比例的增加和溫度的升高,其纍計釋藥率均逐漸增加。
위제고목질소산품적부가치,이납기팽윤토위원료,삼갑기목질소계안염( T-QL)위개성제,제비료삼갑기목질소계안염/팽윤토( L-Bt)완석제;병이악매령작위모의농약,고찰료L-Bt완석제대악매령적흡부성능급완석성능。이용FT-IR표정료기결구,채용XRD분석료개성후팽윤토적저면간거。결과표명:계안리자이성공부재도팽윤토상;개성후적팽윤토인기층간역적팽창,층간거증대。개성팽윤토완석제최가제비공예조건위:T-QL용량위팽윤토양리자교환용량0.8배적개성팽윤토(L-0.8Bt),L-0.8Bt적투가량위0.06 g,흡부시간10 h,악매령초시질량농도위500 mg/L,pH치위4시,기최대흡부량위281 mg/g。통과수용완석실험연구료약수비례화온도대재약량위281 mg/g 적L-0.8Bt완석성능적영향,결과표명,수착약수비례적증가화온도적승고,기루계석약솔균축점증가。
In order to enhance the added value of lignin products, the slow release formulation based on lignin derived trimethyl quaternary ammonium salt / bentonite( L-Bt) was synthesized with using sodium-based bentonite as a raw material and trimethyl quaternary ammonium lignin ( T-QL) as the modification agent. Hymexazol was selected as a simulate pesticide. The adsorption and slow release performance of L-Bt formulation for hymexazol were investigated. The structure and basal spacing of modified bentonite were analyzed by FT-IR and XRD. The results showed that quaternary ammonium ion was successfully loaded on bentonite. The modification caused the expansion of the interlayer domain of bentonite, and led to the increase of the basal spacing. The optimum adsorption conditions for hymexazol were L-0. 8Bt ( the T-QL dosage was 0. 8 times of cation exchange capacity (CEC) of bentonite), the dosage of L-0. 8Bt 0. 06 g, adsorption time 10 h, mass concentration of hymexazol 500 mg/L and pH value of 4. Additionally, the effect of potion proportion and temperature on the cumulative release rate of L-0. 8Bt with the maximum adsorption capacity 281 mg/g was studied by water soluble method. The result showed that Accumulative drug release rate increased gradually with the increase of loading drug ratio and temperature.