TY - JOUR
T1 - Novel, tadpole-shaped, polyhedral oligomeric silsesquioxane containing sulfonated block copolymer for humidity sensing
AU - Chen, Fang
AU - Yang, Jiayu
AU - Cai, Rong
AU - Qi, Mengfei
AU - Ma, Xiaoyan
N1 - Publisher Copyright:
© 2020 The Author
PY - 2020/8
Y1 - 2020/8
N2 - Due to the “trade-off” effect between the high water adsorption and low stability under high Relative Humidity of polymer matrix, fabrication of resistive-type polymer-based humidity sensors with a wide impedance response and excellent stability in high relative humidity remains a great challenge. Aim at solving that, a novel polymeric humidity sensing matrix, specifically a tadpole-shaped, polyhedral oligomeric silsesquioxane (POSS) containing block copolymers (BCPs) of POSS-poly(methyl methacrylate)-polystyrene (POSS-PMMA-SPS) were proposed. This novel BCP was synthesized using atom transfer radical polymerization (ATRP) employing a two-step approach, and following post sulfonation, a series of sulfonated BCPs (POSS-PMMA-SPS) with different sulfonation degree was obtained. The subject humidity sensors were produced using different sulfonated BCPs employing a dip-coating technique, and three wide-impedance response humidity sensors were produced. Each of these sensors exhibited an excellent humidity-sensing response of more than 104 within the humidity range from 11% to 95% RH. In particular, the humidity sensor S-6 that had a proper degree of sulfonation presented a relatively fast response (t90% of 11 s and 80 s in both the water adsorption and desorption processes), and superior repeatability for more than 30 days.
AB - Due to the “trade-off” effect between the high water adsorption and low stability under high Relative Humidity of polymer matrix, fabrication of resistive-type polymer-based humidity sensors with a wide impedance response and excellent stability in high relative humidity remains a great challenge. Aim at solving that, a novel polymeric humidity sensing matrix, specifically a tadpole-shaped, polyhedral oligomeric silsesquioxane (POSS) containing block copolymers (BCPs) of POSS-poly(methyl methacrylate)-polystyrene (POSS-PMMA-SPS) were proposed. This novel BCP was synthesized using atom transfer radical polymerization (ATRP) employing a two-step approach, and following post sulfonation, a series of sulfonated BCPs (POSS-PMMA-SPS) with different sulfonation degree was obtained. The subject humidity sensors were produced using different sulfonated BCPs employing a dip-coating technique, and three wide-impedance response humidity sensors were produced. Each of these sensors exhibited an excellent humidity-sensing response of more than 104 within the humidity range from 11% to 95% RH. In particular, the humidity sensor S-6 that had a proper degree of sulfonation presented a relatively fast response (t90% of 11 s and 80 s in both the water adsorption and desorption processes), and superior repeatability for more than 30 days.
KW - Humidity sensor
KW - POSS containing block copolymer
KW - Sulfonation degree
KW - Tadpole-shaped
KW - Wide impedance response
UR - http://www.scopus.com/inward/record.url?scp=85081657063&partnerID=8YFLogxK
U2 - 10.1016/j.cclet.2020.01.020
DO - 10.1016/j.cclet.2020.01.020
M3 - 文章
AN - SCOPUS:85081657063
SN - 1001-8417
VL - 31
SP - 2119
EP - 2124
JO - Chinese Chemical Letters
JF - Chinese Chemical Letters
IS - 8
ER -