Investigation and Analysis of the Linguistic Landscape in High-end Consumer Business District in Guangzhou——Taking TaiKoo Hui as an Example

Linguistic landscape has become an emerging research topic in sociolinguistics due to the development of urban linguistic landscape.Based on the development of linguistic landscape in TaiKoo Hui,its diverse characteristics are analyzed,and the language signs,usage,and codes are summarized.It is found that there is poor transmission effect of multilingual landscape information and improper use of linguistic landscape in TaiKoo Hui.This paper concludes that the linguistic landscape of Taikoo Hui can be optimized from two aspects to enhance its attractiveness and competitiveness,including improving the informational function of foreign language signs and regulating the use of linguistic landscape.

From trash to treasure: Chemical recycling and upcycling of commodity plastic waste to fuels, high-valued chemicals and advanced materials

Of all the existing materials, plastics are no doubt among the most versatile ones. However, the extreme increases in plastic production as well as the difficulty of the material for degradation have led to a huge number of plastic wastes. Their recycling rate after disposal is less than 10%, resulting in a series of serious environmental and ecological problems as well as a significant waste of resources. Current recycling methods generally suffer from large energy consumption, the low utilization rate of recycled products with low added value, and produce other waste during the process. Here, we summarized recentlydeveloped chemical recycling ways on commodity plastics, especially new catalytic paths in production of fuels, high-valued chemicals and advanced materials from a single virgin or a mixture of plastic waste,which have emerged as promising ways to valorize waste plastics more economically and environmentally friendly. The new catalyst design criteria as well as innovative catalytic paths and technologies for plastic upcycling are highlighted. Beyond energy recovery by incineration, these approaches demonstrate how waste plastics can be a viable feedstock for energy use with the generation of clean H_(2), high-quality liquid fuels and materials for energy storage, and help inspiring more catalytic process on plastic upcycling to overcome the economical hurdle and building a circular plastic economy.

Enhanced Salt Tolerance of Polyurethane Based Multilayer Films

In our previous study,polyurethane(PU)based multilayer films assembled with weak polyelectrolytes exhibited controllable loading and release properties,but would be decomposed in high salt solution.Herein,a strong polyelectrolyte,poly(styrene sulfonic acid)sodium(PSS),was introduced to fabricate multilayer films.The salt tolerance of the film was investigated by evaluating the loading and release profiles towards model drug in salt solution with different concentrations.Results showed that the release behavior of the film,as well as its loading capacity,can be tuned by varying the salt concentrations.And the film showed a good salt tolerance that can remain integrity even after 6 cycles of drug loading and release in 600 mmol•L^(−1) NaCl solution.It showed that the salt tolerance of PU based films can be greatly improved through assembling with strong polyelectrolyte.