There is a great importance in the development of anion exchange membrane fuel cells (AEMFCs) for renewable energy research. The high conductivity and alkaline stability under high pH conditions at elevated temperatures are required for AEMs. We report herein SEBS-based AEMS with different hydrophobic side chain lengths, and investigated the properties of the corresponding AEMs, including conductivity, morphology and chemophysical stabilities.

The proton exchange membrane fuel cells(PEMFCs) have been noticed as the promising power sources. One of the important components in PEMFC is the proton exchange membranes(PEMs). Recently various materials for PEMs have been investigated for fuel cell applications. Sulfonated aromatic hydrocarbon-based multiblock copolymers have drawn much interest due to their well-defined phase separation between hydrophilic and hydrophobic blocks. In our group, multiblock copolymers based on highly sulfonated poly(fluorenyl ether sulfone)s were developed as highly conductive and stable polymer electrolyte membranes. We report herein the investigation of the influence of phase separation and properties by block length of the corresponding membranes.

Purpose – As the scope of existing digital transformation expanded to various degrees, the Fourth Industrial Revolution came into being. In 2016, Klaus Schwab, Chairman of the World Economic Forum (WEF), said that the new technologies that lead the fourth industrial revolution are AI, Block chain, IoT, Big Data, Augmented Reality, and Virtual Reality. This technology is expected to be a full-fledged fusion of digital, biological and physical boundaries. Everything in the world is connected to the online network, and the trend of 'block chain' technology is getting attention because it is a core technology for realizing a super connective society. If the block chain is commercialized at the World Knowledge Forum (WKF), it will be a platform that can be applied to the entire industry. The block chain is rapidly evolving around the financial sector, and the impact of block chains on logistics, medical services, and public services has increased beyond the financial sector. Research design, data, and methodology – Figure analysis of data and social science analytical software of IBM SPSS AMOS 23.0 and IBM Statistics 23.0 were used for all the data researched. Data were collected from hotel employees in China from 25th March to 10th May. Results – The purpose of this study is to investigate the effect of the block chain characteristics of the existing hotel reservation system on the intention to use and to examine the influence of the block chain characteristics of the hotel reservation system on the intention to use, We rearranged the variables having the same or similar meaning and analyzed the effect of these factors on the intention to use the block chain characteristic of the hotel reservation system. 339 questionnaires were used for analysis. Conclusions – There are only sample hotel workers in this study, and their ages are in their 20s and 30s. In future studies, samples should be constructed in various layers and studied. In this study, the block chain characteristics are set as five variables as security, reliability, economical efficiency, availability, and diversity. Among them, Security and reliability made positive effects on the perceived usefulness. Also, security and economics did on the perceived ease. Availability and diversity did on both perceived usefulness and perceived ease. Perceived ease did on perceived usefulness. And perceived ease and perceived usefulness did on user intent. But security and economics did not on the perceived usefulness