Nacre mimetics show great potential as lightweight, mechanically robust, and functional materials. Here, we introduce highly reinforced nacre-mimetic nanocomposite (NC), prepared via self-assembly of poly(vinyl alcohol) polymer-coated synthetic nanoclay from aqueous dispersions, as a transparent and mechanically robust substrate to prepare silver nanowire (AgNW) embedded thin-film resistive heater. AgNW is a promising substitute for widely used brittle and expensive indium tin oxide (ITO) due to its high electrical conductivity, excellent optical transparency, and good mechanical flexibility. However, current AgNW-based electrodes mostly suffer from limitations such as surface roughness and weak adhesion of AgNWs to flexible plastic substrates (e.g., poly(ethylene terephthalate), PET). We demonstrate that AgNW can be embedded in nacre-mimetic NC substrate by simple hot-pressing as compared to PET, leading to excellent stability against scotch tape peeling without any encapsulation layer. The AgNW/NC resistive heater shows uniform sheet resistance varying from 10 to 80 Ω/sq with 70 to 91% transmittance at 550 nm on decreasing AgNW density from 111 to 23 mg/m 2 . Moreover, AgNW/NC heater can generate rapid (10 s) and repetitive long-term heating response at low input voltages. It shows only small variation in temperature (4 °C) and sheet resistance during bending at 14 mm diameter for 2000 cycles as well as under various extreme mechanical deformations. Taking advantage of the conformability, mechanical deformability, and fast thermal response of the resistive heater, we demonstrated the in vitro temperature-triggered release of antibiotics (i.e.,vancomycin) from phase change material-coated, antibiotic-loaded hydrogels. Hence, we envision that the resistive heater can be introduced as a potential candidate into flexible electronics and wearable devices.

In recent years, the environmental pollution caused by a large amount of domestic solid waste generated in localities across the country is a challenge that governments of all levels, sectors and localities need to focus on solving. In order to make a substantial change in the domestic solid waste management, improve environmental quality and contribute to improving the quality of people’s lives, the Vietnamese Goverment is actively implementing specific activities to strengthen the management and recycle of domestic solid waste throughout the country. Besides, in the current legal documents, there is still a lack of guidance on appropriate technology selection and technical guidance on domestic solid waste collection, storage, treatment and recycle. Solid waste recycling activities are still scattered, spontaneous and lack the management and control of the competent authorities on environmental protection in the locality. The majority of recycling facilities are small in scale, the level of technology investment is not high, the majority of technologies are outdated and the machinery and equipment are obsolete, which causes environmental pollution. This article focuses on the challenges of recycling domestic solid waste in Vietnam. It also provides causes and recommendation to amend and supplement regulations related to recycling domestic solid waste in Vietnam

Eco-industrial park is the new trend in developing sustainable industrial zones. In Vietnam, the concept of ‘eco-industrial park’ has gained its popularity in the last decade; yet there remain many obstacles in actualizing this model. One of the main reasons is the lack of a criteria set for building eco-industrial parks that fits Vietnamese situation. We analyzed criteria for building eco-industrial parks in other countries in order to compare with current criteria in Vietnam. Suggestions for establishing a criteria set for building eco-industrial parks in Vietnam were discussed.