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Yaning Liu,Zhen Xiao,Wenkui Zhang,Hui Huang,Jun Zhang,Yongping Gan,Xinping He,Bingjia Wang,Yi Han,Yang Xia 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.107 No.-
Carbon based conductive polymer composites as electrothermal materials offers many merits in highflexibility, light weight, low cost, excellent processability, and rapid heating ability, however, the maximumworking temperature is usually lower than 200 C, hampering seriously the medium–high temperatureapplications. Herein, a series of rationally designed glass fiber reinforced graphite/carbonblack@polyethersulfone (G/CB@PES) composites are developed to significantly promote the maximumworking temperature over 300 C. To be specific, the introduced glass fibers acted as rigid skeleton greatlyenhance the mechanical strength of PES polymer matrix, thereby offering robust structural stability inhigh temperature working scenario. Meanwhile, glass fibers not only endow G/CB@PES composite withexcellent flame-retardant ability, but also provide rapid thermal conduction channels to reduce the riskof heat accumulation and overheating. More importantly, glass fiber reinforced G/CB@PES composites aselectrothermal film heaters exhibit superior electric heating performance in terms of fast temperatureresponsiveness, high electric heating efficiency, stable maximum working temperatures, and high electricpower efficiency under the relatively low applied voltages of 3–21 V. This work provides new insights onthe innovative design and facile fabrication of high working temperature electrothermal film heaters inemerging applications.
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Bing Jia,Zhaoyang Cheng,Qi Wang,Shujun Zhang,Wei Heng,Liwu Zhu 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.1
‘Dangshansuli’ pear is a yellow–green fruit when mature, whereas that of the mutant ‘Xiusu’ is russeted. In this study, thecontents of glucose, fructose and sucrose in the exocarp of ‘Xiusu’ were found to be lower than those in ‘Dangshansuli’ at75–100 days after full bloom (DAFB) but were higher at 150 DAFB. Additionally, the contents of six polysaccharides inthe exocarp of ‘Xiusu’ were higher than those in ‘Dangshansuli’ at 75 DAFB, the stage at which ‘Xiusu’ becomes russetin color, as well as at 150 DAFB; however, this was not observed for xylose. The contents of type I and II amino acids inthe exocarp of ‘Xiusu’ were higher than those in ‘Dangshansuli’ at diff erent stages, except for at 150 DAFB. The entiresequences of eight genes involved in the shikimate pathway and cell wall structure were cloned, and expression of thesegenes in the exocarp of ‘Dangshansuli’ and ‘Xiusu’ were signifi cantly diff erent during fruit development, indicating thatthese genes might be involved in the russeting process. It is speculated that the shikimate pathway connects primary andsecondary metabolism and that high contents of sugars as carbon sources provide precursors for suberin, lignin and lignanto generate russet skin in pear.
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