Resistive-type film humidity sensors were prepared with a silicone-containing polyelectrolyte （Si-PE） and their humidity sensitive properties have been investigated. The sensors so obtained show high sensitivity to ...Resistive-type film humidity sensors were prepared with a silicone-containing polyelectrolyte （Si-PE） and their humidity sensitive properties have been investigated. The sensors so obtained show high sensitivity to humidity variation over a wide range of RH （20-96%）. In addition, they exhibit high reversibility, quick response and well long-term stability.展开更多
Humidity sensors have become an essential need for improving daily life quality.Here,a novel humidity sensitive fiber was fabricated using the soft polydimethylsiloxane(PDMS)as the core layer and the non-swellable pol...Humidity sensors have become an essential need for improving daily life quality.Here,a novel humidity sensitive fiber was fabricated using the soft polydimethylsiloxane(PDMS)as the core layer and the non-swellable polyvinylidenedifluoride(PVDF)embedded with a swellable MIL-88A as the outer layer.Noticeably,the PDMS fiber was chosen as a carrier due to its smoothness,softness and good tensile properties.The isoreticular FeIII dicarboxylate MIL-88 family with swellable metal-organic frameworks(MOFs)can undergo reversible dynamic structural transformations with a response to external humidity change.The resulted fiber with swellable MOFs showed three kinds of deformation for a single solvent and also had good deformation performance for two-component miscible solution with different volume ratios.As a proof of concept,a shape-memory effect at relative humidity from 10 to 90%and the simulated salt solutions instead of relative humidity changes were used to evaluate humidity change.In addition,a deep insight into the self-shape-change mechanism among those phenomena was investigated,wherein expansion deformation of the PDMS fiber as well as the structural transforma-tion of the MIL-88A worked in different conditions.展开更多
1 Results Humidity sensors have been widely used in meteorology,process controlling,agriculture and manufacturing.In recent year,more attention has been paid to resistive-type polymeric humidity sensors.Polyelectrolyt...1 Results Humidity sensors have been widely used in meteorology,process controlling,agriculture and manufacturing.In recent year,more attention has been paid to resistive-type polymeric humidity sensors.Polyelectrolytes are the most usually used materials for their advantages of high sensitivity,fast response,easy preparation,low cost,etc[1,2].展开更多
1 Results Humidity sensors have been widely investigated in recent years[1,2].In this work,two kinds of polymer resistive-type humidity sensitive materials were prepared as follows:1)polymer electrolyte with an IPN st...1 Results Humidity sensors have been widely investigated in recent years[1,2].In this work,two kinds of polymer resistive-type humidity sensitive materials were prepared as follows:1)polymer electrolyte with an IPN structure formed by the simultaneous quaternization and crosslinking of poly(4-vinylpyridine)(P4VP)and poly(glycidyl methacrylate)(PGMA)with 1,4-dibromobutane(DBB)and diethyltriamine(DETA)respectively.展开更多
文摘Resistive-type film humidity sensors were prepared with a silicone-containing polyelectrolyte （Si-PE） and their humidity sensitive properties have been investigated. The sensors so obtained show high sensitivity to humidity variation over a wide range of RH （20-96%）. In addition, they exhibit high reversibility, quick response and well long-term stability.
基金support from Zhejiang Top Priority Discipline of Textile Science and Engineering,Natural Science Foundation of Zhejiang Province(No.LY13B030009)Science Foundation of Zhejiang Sci-Tech University(ZSTU)(No.1101820-Y).
文摘Humidity sensors have become an essential need for improving daily life quality.Here,a novel humidity sensitive fiber was fabricated using the soft polydimethylsiloxane(PDMS)as the core layer and the non-swellable polyvinylidenedifluoride(PVDF)embedded with a swellable MIL-88A as the outer layer.Noticeably,the PDMS fiber was chosen as a carrier due to its smoothness,softness and good tensile properties.The isoreticular FeIII dicarboxylate MIL-88 family with swellable metal-organic frameworks(MOFs)can undergo reversible dynamic structural transformations with a response to external humidity change.The resulted fiber with swellable MOFs showed three kinds of deformation for a single solvent and also had good deformation performance for two-component miscible solution with different volume ratios.As a proof of concept,a shape-memory effect at relative humidity from 10 to 90%and the simulated salt solutions instead of relative humidity changes were used to evaluate humidity change.In addition,a deep insight into the self-shape-change mechanism among those phenomena was investigated,wherein expansion deformation of the PDMS fiber as well as the structural transforma-tion of the MIL-88A worked in different conditions.
文摘1 Results Humidity sensors have been widely used in meteorology,process controlling,agriculture and manufacturing.In recent year,more attention has been paid to resistive-type polymeric humidity sensors.Polyelectrolytes are the most usually used materials for their advantages of high sensitivity,fast response,easy preparation,low cost,etc[1,2].
文摘1 Results Humidity sensors have been widely investigated in recent years[1,2].In this work,two kinds of polymer resistive-type humidity sensitive materials were prepared as follows:1)polymer electrolyte with an IPN structure formed by the simultaneous quaternization and crosslinking of poly(4-vinylpyridine)(P4VP)and poly(glycidyl methacrylate)(PGMA)with 1,4-dibromobutane(DBB)and diethyltriamine(DETA)respectively.
