化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2014年
6期
1425-1428
,共4页
纳米粒子%表面活性剂%密度%黏度%关联性
納米粒子%錶麵活性劑%密度%黏度%關聯性
납미입자%표면활성제%밀도%점도%관련성
nanoparticles%surfactant%density%viscosity%relevance
采用聚乙烯吡咯烷酮（PVP-K30）对纳米二硫化钼（MoS2）进行表面化学修饰，配制了分散稳定性良好的环烷基纳米冷冻机油。利用旋转式黏度计和密度仪对5种配比的纳米冷冻机油（二硫化钼质量分数为0.25%、0.5%、0.75%、1%、1.25%、1.5%）在不同温度（288~333K）下的密度和黏度进行了测试，并对其数据进行了拟合关联。实验结果表明：经 PVP 修饰的纳米 MoS2在低浓度情况下在冷冻机油中分散稳定性能良好，且在质量分数之比为1∶1时达到最佳分散效果；纳米冷冻机油的黏度随MoS2和PVP质量分数的增加而下降，在温度较低时更为明显；纳米冷冻机油的密度测量值和计算值基本吻合，其密度黏度关联式的计算值与90%的实验数据吻合较好。该结果为纳米冷冻机油在传热、流动和摩擦领域的应用提供了重要的基础数据。
採用聚乙烯吡咯烷酮（PVP-K30）對納米二硫化鉬（MoS2）進行錶麵化學脩飾，配製瞭分散穩定性良好的環烷基納米冷凍機油。利用鏇轉式黏度計和密度儀對5種配比的納米冷凍機油（二硫化鉬質量分數為0.25%、0.5%、0.75%、1%、1.25%、1.5%）在不同溫度（288~333K）下的密度和黏度進行瞭測試，併對其數據進行瞭擬閤關聯。實驗結果錶明：經 PVP 脩飾的納米 MoS2在低濃度情況下在冷凍機油中分散穩定性能良好，且在質量分數之比為1∶1時達到最佳分散效果；納米冷凍機油的黏度隨MoS2和PVP質量分數的增加而下降，在溫度較低時更為明顯；納米冷凍機油的密度測量值和計算值基本吻閤，其密度黏度關聯式的計算值與90%的實驗數據吻閤較好。該結果為納米冷凍機油在傳熱、流動和摩抆領域的應用提供瞭重要的基礎數據。
채용취을희필각완동（PVP-K30）대납미이류화목（MoS2）진행표면화학수식，배제료분산은정성량호적배완기납미냉동궤유。이용선전식점도계화밀도의대5충배비적납미냉동궤유（이류화목질량분수위0.25%、0.5%、0.75%、1%、1.25%、1.5%）재불동온도（288~333K）하적밀도화점도진행료측시，병대기수거진행료의합관련。실험결과표명：경 PVP 수식적납미 MoS2재저농도정황하재냉동궤유중분산은정성능량호，차재질량분수지비위1∶1시체도최가분산효과；납미냉동궤유적점도수MoS2화PVP질량분수적증가이하강，재온도교저시경위명현；납미냉동궤유적밀도측량치화계산치기본문합，기밀도점도관련식적계산치여90%적실험수거문합교호。해결과위납미냉동궤유재전열、류동화마찰영역적응용제공료중요적기출수거。
In this research,the nanofrigeration oil with good stability were prepared by adopting polyvinylpyrrolidone (PVP-K30)to modify molybdenum disulfide nanoparticles. Tests on the density and viscosity of 5 nanorefrigeration oil with different proportions(mass fraction of molybdenum disulfide is 0.25%,0.5%,0.75%,1%,1.25%,1.5%,respectively)were carried out using rotating viscometer and densimeter within the temperature range of 288K to 333K. Based on the experimental results , data-fitting was done correspondingly. The experimental results showed that:MoS2 nanoparticles had good dispersion stability in low concentration nanorefrigeration oil after modified by PVP. The nanorefrigeration oil presented the best dispersion performance when mass fraction proportion of MoS2 and PVP was 1∶1;with the increase of mass fraction of MoS2 and PVP,the viscosity of nanorefrigeration oil decreased and the reduction was more obvious in lower temperature conditions;the measured values of density of nanorefrigeration oil were basically consistent with the calculated values,and 90 percent of the values calculated from viscosity-density correlation agreed with the experimental data. The results of the research provided important data foundation for application of nanorefrigeration oil in fields of heat transfer,flow and friction.
