石油化工
石油化工
석유화공
PETROCHEMICAL TECHNOLOGY
2015年
1期
116-120
,共5页
超临界抗溶剂法%聚乳酸%污水处理%多孔载体
超臨界抗溶劑法%聚乳痠%汙水處理%多孔載體
초림계항용제법%취유산%오수처리%다공재체
supercritical anti-solvent technology%poly(lactic acid)%sewage treatment%porous support
采用超临界抗溶剂法制备了用于污水处理的具有一定孔径的可降解聚乳酸（PLA）多孔载体，考察了压力、温度、保压时间、聚合物溶液质量浓度以及CO2循环时间等工艺参数对PLA多孔载体孔径的影响，并采用SEM方法对制得的PLA多孔载体进行了表征。通过单因素实验及正交实验得到了制备PLA多孔载体的最优工艺条件：聚合物溶液质量浓度160 g/L，压力12 MPa，温度45℃，CO2循环时间90 min，保压时间90 min。在此条件下得到了孔分布均匀、连通性好、平均孔径为160μm的PLA多孔载体。重复实验结果表明，在最优工艺条件下制得的PLA多孔载体的孔径重复率好。
採用超臨界抗溶劑法製備瞭用于汙水處理的具有一定孔徑的可降解聚乳痠（PLA）多孔載體，攷察瞭壓力、溫度、保壓時間、聚閤物溶液質量濃度以及CO2循環時間等工藝參數對PLA多孔載體孔徑的影響，併採用SEM方法對製得的PLA多孔載體進行瞭錶徵。通過單因素實驗及正交實驗得到瞭製備PLA多孔載體的最優工藝條件：聚閤物溶液質量濃度160 g/L，壓力12 MPa，溫度45℃，CO2循環時間90 min，保壓時間90 min。在此條件下得到瞭孔分佈均勻、連通性好、平均孔徑為160μm的PLA多孔載體。重複實驗結果錶明，在最優工藝條件下製得的PLA多孔載體的孔徑重複率好。
채용초림계항용제법제비료용우오수처리적구유일정공경적가강해취유산（PLA）다공재체，고찰료압력、온도、보압시간、취합물용액질량농도이급CO2순배시간등공예삼수대PLA다공재체공경적영향，병채용SEM방법대제득적PLA다공재체진행료표정。통과단인소실험급정교실험득도료제비PLA다공재체적최우공예조건：취합물용액질량농도160 g/L，압력12 MPa，온도45℃，CO2순배시간90 min，보압시간90 min。재차조건하득도료공분포균균、련통성호、평균공경위160μm적PLA다공재체。중복실험결과표명，재최우공예조건하제득적PLA다공재체적공경중복솔호。
Degradable porous poly(lactic acid)(PLA) supports which could be used in sewage treatment were prepared by supercritical anti-solvent technology and characterized by means of SEM. The influences of pressure,temperature,pressure hold time,polymer concentration and CO2 cycling time on the pore diameter of the porous PLA supports were investigated. The optimal conditions for the preparation of the porous PLA supports were obtained through single factor experiments and orthogonal experiments. The porous PLA support with average pore size of about 160μm, uniform pore distribution and good connectivity could be prepared under the optimal conditions of polymer solution mass concentration 160 g/L,pressure 12 MPa,temperature 45℃,CO2 cycling time 90 min and pressure hold time 90 min. The repeatability of the experiments was good.
