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Materials from renewable resources have attracted increasing attention in recent decades as a result of environmental concerns and due to the depletion of petroleum resources. Polymeric materials from renewable sources have a long history. They were used in ancient times and later accompanied the development of man and civilization. Currently, they are widespread in many areas of life and used, for example, in packaging and in the automotive, construction and pharmaceutical industries.The aim of this Special Issue is to highlight the progress in the manufacturing, characterization, and applications of environmentally friendly polymeric blends from renewable resources. The following aspects were investigated: (i) synthesis of composites based on natural llers; (ii) chemical modi cation of polymers or fillers in order to improve interfacial interactions; (iii) potential applications of the biobased materials.

Environmental science, engineering & technology --- lignin --- microspheres --- composites --- polymeric material --- fractionation --- porosity --- radiation grafting --- cotton linter --- phosphate adsorption --- dynamic studies --- bio-polyethylene --- barley straw --- thermomechanical fibers --- interface --- automotive industry --- natural fiber --- polypropylene --- stiffness --- curauá fibers --- microcrystalline cellulose (MCC) --- unsaturated polyester resins --- thermogravimetric analysis (TG) --- mechanical analysis --- dynamic mechanical analysis (DMA) --- LignoBoost® kraft lignin --- potentiometric sensors --- carbon nanotubes --- impedance spectroscopy --- transition metals --- rice nanofibers --- biocomposites --- casting --- mechanical properties --- thermal properties --- rigid polyurethane foams --- lignocellulosic materials --- filler --- chemical treatment --- mechanical characteristics --- pyrolysis process --- Caragana korshinskii biochar --- physicochemical properties --- adsorption characteristics --- nitrate nitrogen --- bio-oil --- polyurethanes --- hemp shives --- bio-filler --- oil impregnation --- sugar beet pulp --- thermal conductivity --- polyurethane composites --- lavender --- kaolinite --- hydroxyapatite --- high-ball milling process --- antibacterial activity --- wood–resin composites --- unsaturated polyester resin --- recycled PET --- wood flour --- renewable resources --- silver nanoparticles --- n/a --- curauá fibers --- wood-resin composites

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Dear colleagues, Geological energy has a long history in China. As early as 500 BC, China began to use coal as fuel. In the middle of the 19th century, China began to develop oil resources. After the foundation of new China, with the discovery of the Daqing oilfield, China's oil industry entered an era of great development. During the 21st century, with the development of drilling technology, the development of unconventional energy such as shale gas and shale oil has entered a new era. In recent years, the development of flammable ice has set off a wave of clean energy. With the carbon reduction plan proposed by the Chinese government, clean geo-energy has been granted unparalleled development space in the future. China's geo-energy development technology used to lag behind that of major developed countries for a long time, but after years of development, it has become the world's leading edge in some fields. Therefore, we specially set up this collection to collect China's advanced geo-energy exploitation technology and development trends, whilst providing some new directions for thinking about geo-energy development in China and even the world. This collection seeks to contribute to such topics through enhanced scientific and multidisciplinary knowledge.

airflow reversal --- gas outburst --- mine ventilation system --- orthogonal experiment --- numerical simulation --- deep chamber --- asymmetric failure --- mechanical analysis --- control measures --- Yinggehai --- overpressure --- hydraulic fracture --- mudstone --- fluid pressure --- red sandstone --- pre-existing cracks --- creep behavior --- temperature --- long-term permeability --- partial saturation --- patchy saturation --- squirt flow --- P-wave velocity dispersion and attenuation --- anelasticity --- ultrasonic measurements --- heavy oil reservoirs --- cyclic steam stimulation --- conformance control --- extreme gradient boost (XGBoost) trees --- prediction model --- Dongsha Waters in the northern South China Sea margin --- velocity inversion --- mud volcano --- magma intrusion --- Mesozoic hydrocarbon --- tubing --- modal analysis --- fluid-structure interaction --- inlet pressure --- pipeline --- water hammer --- gas-liquid two-phase flow --- pressure --- velocity --- lattice Boltzmann method --- discrete element method --- sand production --- force chain network analysis --- seismic sedimentology --- sedimentary facies evolution --- peat accumulation regularity --- frequency–division amplitude fusion --- thin sand bodies --- stable crack propagation --- crack strain --- stress–strain curve --- model --- wing crack --- outburst coal --- primary coal --- structural parameters --- infrared spectrum --- XRD --- oil shale --- in situ conversion project --- biomarker --- pyrolysis process --- organic geochemistry

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• Reference Manager
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Dear colleagues, Geological energy has a long history in China. As early as 500 BC, China began to use coal as fuel. In the middle of the 19th century, China began to develop oil resources. After the foundation of new China, with the discovery of the Daqing oilfield, China's oil industry entered an era of great development. During the 21st century, with the development of drilling technology, the development of unconventional energy such as shale gas and shale oil has entered a new era. In recent years, the development of flammable ice has set off a wave of clean energy. With the carbon reduction plan proposed by the Chinese government, clean geo-energy has been granted unparalleled development space in the future. China's geo-energy development technology used to lag behind that of major developed countries for a long time, but after years of development, it has become the world's leading edge in some fields. Therefore, we specially set up this collection to collect China's advanced geo-energy exploitation technology and development trends, whilst providing some new directions for thinking about geo-energy development in China and even the world. This collection seeks to contribute to such topics through enhanced scientific and multidisciplinary knowledge.

Research & information: general --- airflow reversal --- gas outburst --- mine ventilation system --- orthogonal experiment --- numerical simulation --- deep chamber --- asymmetric failure --- mechanical analysis --- control measures --- Yinggehai --- overpressure --- hydraulic fracture --- mudstone --- fluid pressure --- red sandstone --- pre-existing cracks --- creep behavior --- temperature --- long-term permeability --- partial saturation --- patchy saturation --- squirt flow --- P-wave velocity dispersion and attenuation --- anelasticity --- ultrasonic measurements --- heavy oil reservoirs --- cyclic steam stimulation --- conformance control --- extreme gradient boost (XGBoost) trees --- prediction model --- Dongsha Waters in the northern South China Sea margin --- velocity inversion --- mud volcano --- magma intrusion --- Mesozoic hydrocarbon --- tubing --- modal analysis --- fluid-structure interaction --- inlet pressure --- pipeline --- water hammer --- gas-liquid two-phase flow --- pressure --- velocity --- lattice Boltzmann method --- discrete element method --- sand production --- force chain network analysis --- seismic sedimentology --- sedimentary facies evolution --- peat accumulation regularity --- frequency–division amplitude fusion --- thin sand bodies --- stable crack propagation --- crack strain --- stress–strain curve --- model --- wing crack --- outburst coal --- primary coal --- structural parameters --- infrared spectrum --- XRD --- oil shale --- in situ conversion project --- biomarker --- pyrolysis process --- organic geochemistry --- airflow reversal --- gas outburst --- mine ventilation system --- orthogonal experiment --- numerical simulation --- deep chamber --- asymmetric failure --- mechanical analysis --- control measures --- Yinggehai --- overpressure --- hydraulic fracture --- mudstone --- fluid pressure --- red sandstone --- pre-existing cracks --- creep behavior --- temperature --- long-term permeability --- partial saturation --- patchy saturation --- squirt flow --- P-wave velocity dispersion and attenuation --- anelasticity --- ultrasonic measurements --- heavy oil reservoirs --- cyclic steam stimulation --- conformance control --- extreme gradient boost (XGBoost) trees --- prediction model --- Dongsha Waters in the northern South China Sea margin --- velocity inversion --- mud volcano --- magma intrusion --- Mesozoic hydrocarbon --- tubing --- modal analysis --- fluid-structure interaction --- inlet pressure --- pipeline --- water hammer --- gas-liquid two-phase flow --- pressure --- velocity --- lattice Boltzmann method --- discrete element method --- sand production --- force chain network analysis --- seismic sedimentology --- sedimentary facies evolution --- peat accumulation regularity --- frequency–division amplitude fusion --- thin sand bodies --- stable crack propagation --- crack strain --- stress–strain curve --- model --- wing crack --- outburst coal --- primary coal --- structural parameters --- infrared spectrum --- XRD --- oil shale --- in situ conversion project --- biomarker --- pyrolysis process --- organic geochemistry