一种复合正渗透膜的制备方法

本发明涉及一种复合正渗透膜的制备方法。目前正渗透过程存在内浓差极化现象。本发明方法首先将聚砜和添加剂加入溶剂中搅拌溶解，得到分散均匀的聚砜铸膜液；配制质量百分比为0.05～5﹪的环糊精水溶液和均苯酰氯正己烷溶液；然后用刮刀将分散均匀的聚砜铸膜液刮在无纺布上，然后浸入凝固浴去离子水中，得到聚砜超滤底膜；将聚砜超滤底膜先后浸泡在环糊精水溶液和均苯酰氯正己烷溶液中，固化后得到复合正渗透膜。本发明方法工艺简单，所制备的正渗透膜具有很高机械强度、耐溶剂性、较高的水通量和高盐截留率

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies