Molecular design and applications of a nanostructure green Tripodal surface active ionic liquid in enhanced oil recovery: Interfacial tension reduction, wettability alteration, and emulsification

Surface active ionic liquids (SAILs) are considered as prominent materials in enhanced oil recovery thanks to their high interfacial activity. This study reports the preparation and applications of a nanostructure Tripodal imidazolium SAIL as an environmentally-friendly substitute to the conventional surfactants. The product has a star-like molecular structure centered by a triazine spacer, namely [(C_(4)im)_(3)TA][Cl_(3)], prepared by a one-step synthesis method and characterized with FT-IR, NMR, XRD, and SEM analysis methods. The interfacial tension of the system was decreased to about 78% at critical micelle concentration of less than 0.08 mol·dm^(−3). Increasing temperature, from 298.2 to 323.2 K, improved this capability. The solid surface wettability was changed from oil-wet to water-wet and 80% and 77% stable emulsions of crude oil–aqueous solutions were created after one day and one week, respectively. Compared to the Gemini kind homologous SAILs, the superior effects of the Tripodal SAIL were revealed and attributed to the strong hydrophobic branches in the molecule. The Frumkin adsorption isotherm precisely reproduced the generated IFT data, and accordingly, the adsorption and thermodynamic parameters were determined.

Summary of Research on Use of Sediment in Building Materials

Based on the recent research at home and abroad,this paper summarizes the preparation of cement clinker,baking-free brick,subgrade filler and ceramsite from sediment,and puts forward relevant suggestions and prospects for the future research direction of sediment.

The Permeability and Strength of Green High Performance Concrete

The permeability,alkali silica reaction,workability and strength of GHPC(green high performance concrete) were studied in this paper.The results show that GHPC has an excellent durability and the effects of mass ratio of flyash to high calcium slag,water binder ratio,content of water reducer,and crushed coarse aggregate type on the workability and strength of GHPC were considerably evident.A new path for the concretes continuous development was put forward.

Analysis of Sustainable Materials Used in Ecovillages: Review of Progress in BedZED and Masdar City

This paper explores reclaimed and recycled material used in ecovillages. The models discussed in this paper include BedZED in the United Kingdom and Masdar City in the Middle East. These two communities contain features characterized by the sustainable principles of the ecovillage concept by using non-traditional building materials. The creations of more ecovillages, along with the growth of current ecovillages, play an important role in positively solvening environmental and social problems. The sustainable materials used in the ecovillages also act as a model for communities wishing to implement sustainable development.

Synthesis of a New Family of Green Light Emitting Material Containing Both Hole and Electron Transporting Units

Two new molecules containing oxadiazoles and triphenylamine-stilbene moiety were synthesized. Their luminescent properties were determined, which indicated that they had strong green fluorescent properties. All the two molecules can be used as green organic electrolumine- scence materials.

Digital twin-driven green material optimal selection and evolution in product iterative design

In recent years,green concepts have been integrated into the product iterative design in the manufacturing field to address global competition and sustainability issues.However,previous efforts for green material optimal selection disregarded the interaction and fusion among physical entities,virtual models,and users,resulting in distortions and inaccuracies among user,physical entity,and virtual model such as inconsistency among the expected value,predicted simulation value,and actual performance value of evaluation indices.Therefore,this study proposes a digital twin-driven green material optimal selection and evolution method for product iterative design.Firstly,a novel framework is proposed.Subsequently,an analysis is carried out from six perspectives:the digital twin model construction for green material optimal selection,evolution mechanism of the digital twin model,multi-objective prediction and optimization,algorithm design,decision-making,and product function verification.Finally,taking the material selection of a shared bicycle frame as an example,the proposed method was verified by the prediction and iterative optimization of the carbon emission index.

Recent advances in the microfluidic generation of shape-controllable hydrogel microparticles and their applications

Hydrogel microparticles,generally accepted as significant green materials,have been widely used in chemical,biological,and biomedical fields owing to their excellent biocompatibility,biodegradability,and noncytotoxicity.Among these,non-spherical hydrogel microparticles with diverse shape anisotropy have great potential in applications such as drug delivery,cellular interaction,micromotors,etc.Benefiting from their shapes,their functionalities in such fields cannot be satisfied by the typical spherical types.Recently,microfluidics with precise control and domination of fluids at microflow sizes has emerged as a powerful method for synthesizing shape-controllable hydrogel microparticles with good monodispersity and unique morphology.In this review,we tried to provide an overview of the production of non-spherical microparticles composed of green hydrogel materials,emphasizing the microfluidic approaches.Furthermore,a brief introduction to their current applications is also presented.

Development of sustainable thermal insulation based on bio-polyester filled with date pits

Date palm pit(DPP)-filled poly(-hydroxybutyrate)(PHB)composites were prepared,evaluated,and characterized to determine their thermal insulation ability.Thermal conductivity values ranged between 0.086 and 0.100 W/(m·K).At a maximum filler concentration(50%(w)),the specific heat capacity and thermal diffusivity were 1183 J/(kg·K)and 0.0689 mm^(2)/s,respec-tively.The DPP increased the thermal stability,and the highest compressive strength obtained was 80 MPa at 30%filler content.The PHB-DPP composites exhibited promising water absorption(less than 6%)and tensile strength(6-14 MPa).Date-pit-based PHB composites could be used in sustainable building engineering and cleaner production.

Application of Waste Bamboo Materials on Produced Eco-brick

With regard to the optimization test of mixing ratio between waste bamboo and cement,the single axial compression strength of the second set(5:95) is the highest.By increasing the mixing ratio to 10:90 and complying with Chinese national standard(CNS) required strength for water permeable bricks.In the test for optimizing the mixing ratio of waste bamboo-charcoal and cement,the second set of single-axial compression strengths is the highest.Further increasing the ratio to 40:60,the single-axial compression strength also can be up to 9.212 MPa,and complying with CNS requir 7.840 MPa for the strength of decoration bricks.In the investigation of the optimization ratio for the mixture ratio of 2(hammered fine coal debris):1(fly-ash):1(cement) after a 28-day aging,and the resultant strength of 39.788 MPa are observed for each set,and complying with the strength required by CNS for high-pressure brick C-grade.By means of natural strengthen agents can increase the strength,it is concluded that the strengthen agents can significantly increase the strength after aging for 6 to 28 days.For competitive strategy for a future market,it should be focused on the creation of differentiation for product and technology,the increase of service and features,as well as the branding effect to become a price-leader.