Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammoni...Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammonium asymmetric gemini surfactants(RGS-2-n)with different alkyl chain lengths(n=12,14,16,18)were synthesized using a simple two-step method based on dehydroabietylamine as the raw material.The feasibility of these surfactants for cleaning purposes was comprehensively evaluated,suggesting that the surfactants own high surface activity and good cleaning performance.Furthermore,by successfully introducing the amine group of dehydroabietylamine into the hydrophilic group of the surfactants,we avoided its potential harm to the environment and water pollution.Density functional theory proves rosin-based gemini surfactants with asymmetric structure can further improve cleaning efficiency.Overall,our findings suggests that RGS-2-n surfactants are promising and sustainable candidates for cleaning electric plates,and provide new opportunities for rosin application in the electric industry.展开更多
Carbon-based perovskite solar cells show great potential owing to their low-cost production and superior stability in ambient air.However,scaling up to high-efficiency carbon-based solar modules hinges on reliable dep...Carbon-based perovskite solar cells show great potential owing to their low-cost production and superior stability in ambient air.However,scaling up to high-efficiency carbon-based solar modules hinges on reliable deposition of uniform defect-free perovskite films over large areas,which is an unsettled but urgent issue.In this work,a long-chain gemini surfactant is introduced into perovskite precursor ink to enforce self-assembly into a network structure,considerably enhancing the coverage and smoothness of the perovskite films.The long gemini surfactant plays a distinctively synergistic role in perovskite film construction,crystallization kinetics modulation and defect passivation,leading to a certified record power conversion efficiency of 15.46%with Voc of 1.13 V and Jsc of 22.92 mA cm^(-2)for this type of modules.Importantly,all of the functional layers of the module are printed through a simple and high-speed(300 cm min^(-1))blade coating strategy in ambient atmosphere.These results mark a significant step toward the commercialization of all-printable carbon-based perovskite solar modules.展开更多
以十二胺和二溴乙烷为原料合成双长链二胺,再与丙烷磺内酯反应经中和后得到磺酸盐型Gemini表面活性剂(C12GS)。运用TLC对反应进程进行了监测,并对文献中的重结晶剂进行了改进。用1 H NMR对中间产物双链二胺和最终产物进行了结构表征。...以十二胺和二溴乙烷为原料合成双长链二胺,再与丙烷磺内酯反应经中和后得到磺酸盐型Gemini表面活性剂(C12GS)。运用TLC对反应进程进行了监测,并对文献中的重结晶剂进行了改进。用1 H NMR对中间产物双链二胺和最终产物进行了结构表征。测定了Gemini磺酸盐表面活性剂水溶液的表面张力和临界胶束浓度,探讨了Gemini磺酸盐表面活性剂产物与同样疏水碳数的阳离子Gemini表面活性剂(C12GC)在蒸馏水和0.5%NaCl中的相互作用以及盐对表面张力的影响。实验表明:合成的Gemini表面活性剂临界胶束浓度cmc为0.045mmol/L;产物与C12GC有较好的协同作用,混合体系中两种物质浓度相差越大,阴阳离子Gemini表面活性剂协同作用就越强,两者含量逐渐接近,协同作用减弱;C12GS较易进入混合胶团中,盐的加入会促使阴阳离子Gemini表面活性剂混合溶液的表面张力下降,cmc略有上升,同时二者之间的协同作用下降。展开更多
基金supported by National Natural Science Foundation of China(U21A200313)Key Program of Qingyuan Innovation Laboratory(00221003)‘111’program of Fuzhou University.
文摘Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammonium asymmetric gemini surfactants(RGS-2-n)with different alkyl chain lengths(n=12,14,16,18)were synthesized using a simple two-step method based on dehydroabietylamine as the raw material.The feasibility of these surfactants for cleaning purposes was comprehensively evaluated,suggesting that the surfactants own high surface activity and good cleaning performance.Furthermore,by successfully introducing the amine group of dehydroabietylamine into the hydrophilic group of the surfactants,we avoided its potential harm to the environment and water pollution.Density functional theory proves rosin-based gemini surfactants with asymmetric structure can further improve cleaning efficiency.Overall,our findings suggests that RGS-2-n surfactants are promising and sustainable candidates for cleaning electric plates,and provide new opportunities for rosin application in the electric industry.
基金supported by the National Natural Science Foundation of China(U2001217,22261160370 and 21972006)Guangdong-Hong Kong-Macao Joint Innovation Foundation(2021A0505110003)+1 种基金Shenzhen Basic Research(JCYJ20220818101018038 and JCYJ20200109110628172)Guangdong Province Regional Joint Innovation Foundation(2020B1515120039)。
文摘Carbon-based perovskite solar cells show great potential owing to their low-cost production and superior stability in ambient air.However,scaling up to high-efficiency carbon-based solar modules hinges on reliable deposition of uniform defect-free perovskite films over large areas,which is an unsettled but urgent issue.In this work,a long-chain gemini surfactant is introduced into perovskite precursor ink to enforce self-assembly into a network structure,considerably enhancing the coverage and smoothness of the perovskite films.The long gemini surfactant plays a distinctively synergistic role in perovskite film construction,crystallization kinetics modulation and defect passivation,leading to a certified record power conversion efficiency of 15.46%with Voc of 1.13 V and Jsc of 22.92 mA cm^(-2)for this type of modules.Importantly,all of the functional layers of the module are printed through a simple and high-speed(300 cm min^(-1))blade coating strategy in ambient atmosphere.These results mark a significant step toward the commercialization of all-printable carbon-based perovskite solar modules.
文摘以十二胺和二溴乙烷为原料合成双长链二胺,再与丙烷磺内酯反应经中和后得到磺酸盐型Gemini表面活性剂(C12GS)。运用TLC对反应进程进行了监测,并对文献中的重结晶剂进行了改进。用1 H NMR对中间产物双链二胺和最终产物进行了结构表征。测定了Gemini磺酸盐表面活性剂水溶液的表面张力和临界胶束浓度,探讨了Gemini磺酸盐表面活性剂产物与同样疏水碳数的阳离子Gemini表面活性剂(C12GC)在蒸馏水和0.5%NaCl中的相互作用以及盐对表面张力的影响。实验表明:合成的Gemini表面活性剂临界胶束浓度cmc为0.045mmol/L;产物与C12GC有较好的协同作用,混合体系中两种物质浓度相差越大,阴阳离子Gemini表面活性剂协同作用就越强,两者含量逐渐接近,协同作用减弱;C12GS较易进入混合胶团中,盐的加入会促使阴阳离子Gemini表面活性剂混合溶液的表面张力下降,cmc略有上升,同时二者之间的协同作用下降。
