Today, the scientific community is facing crucial challenges in delivering a healthier world for future generations. Among these, the quest for circular and sustainable approaches for plastic recycling is one of the most demanding for several reasons. Indeed, the massive use of plastic materials over the last century has generated large amounts of long-lasting waste, which, for much time, has not been object of adequate recovery and disposal politics. Most of this waste is generated by packaging materials. Nevertheless, in the last decade, a new trend imposed by environmental concerns brought this topic under the magnifying glass, as testified by the increasing number of related publications. Several methods have been proposed for the recycling of polymeric plastic materials based on chemical or mechanical methods. A panorama of the most promising studies related to the recycling of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polystyrene (PS) is given within this review.

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

Agri-food wastes (such as brewer’s spent grain, olive pomace, residual pulp from fruit juice production, etc.) are produced annually in very high quantities posing a serious problem, both environmentally and economically. These wastes can be used as secondary starting materials to produce value-added goods within the principles of the circular economy. In this context, this review focuses on the use of agri-food wastes either to produce building blocks for bioplastics manufacturing or biofillers to be mixed with other bioplastics. The pros and cons of the literature analysis have been highlighted, together with the main aspects related to the production of bioplastics, their use and recycling. The high number of European Union (EU)-funded projects for the valorisation of agri-food waste with the best European practices for this industrial sector confirm a growing interest in safeguarding our planet from environmental pollution. However, problems such as the correct labelling and separation of bioplastics from fossil ones remain open and to be optimised, with the possibility of reuse before final composting and selective recovery of biomass.

/pdf/agri-food-wastes-for-bioplastics-european-prospective-on-185m0amh.pdf

Agri-Food Wastes for Bioplastics: European Prospective on Possible Applications in Their Second Life for a Circular Economy

Catalytic pyrolysis kinetic behaviour of glass fibre-reinforced epoxy resin composites over ZSM-5 zeolite catalyst

Recent researches on Cu-Ni alloy matrix composites through electrodeposition and powder metallurgy methods: A review

Development of sustainable and lighter-weight materials with low or zero carbon footprint is the major research field in 21st century. The current research has been focused on the development of hybrid composite materials from organic wood particles and graphene nanoparticles (GNPs) along with epoxy resin as matrix material. A constant 5% weight percentage of wood particles has been maintained, while GNPs weight percentages have been varied from 0% to 1% by weight with an equal interval of 0.25. The effects of GNPs addition on wood particle reinforced epoxy composite have been examined by performing different structural, physical, mechanical, thermal, and dynamic mechanical testings. The addition of GNPs up to 0.75% resulted in the increment of 28% hardness, 42.04% tensile strength, 34.24% flexural strength, 22.47% impact strength, and 16.3% fracture toughness, and 129.61% conductivity compared with wood composites (GPC-0.0). Similar observations have been observed for dynamic mechanical analysis where, the GPC-0.75 composites recorded maximum storage modulus (2.54 GPa), viscous modulus (0.27 GPa), and glass transition temperature (97°C). Further increments of graphene percentage (GPC-1.0) resulted in agglomeration between particles and revealed decrements properties. The structural analysis of wood particles and GNPs have been examined with X-ray diffractometer, Fourier transforms infrared spectroscopy, and thermogravimetric analysis. The developed composites showed better interfacial bonds between matrix and reinforcements that reduce the void and moisture contents as well as improved the fracture behavior. Therefore, these filter-hybrid composites may be used for energy harvesting, solar cells, electronic gadgets, sensor, and heating equipment. 

Effects of graphene nanoparticles with organic wood particles: A synergistic effect on the structural, physical, thermal, and mechanical behavior of hybrid composites

A review on polymer composite with waste material as reinforcement

Abstract: Fire Incident is a disaster that can potentially cause the loss of life, property damage and permanent disability to the affected victim. The Victim of Fire Incident can also suffer from prolonged psychological and trauma. Fire fighters are primarily tasked to handle fire incidents, but they are often exposed to higher risks when extinguishing fire, especially in hazardous environments such as in nuclear power plant, petroleum refineries and gas tanks. They are also faced with other difficulties, particularly if fire occurs in narrow and restricted places, as it is necessary to explore the ruins of buildings and obstacles to extinguish the fire and save the victim. With high barriers and risks in fire extinguishment operations, technological innovations can be utilized to assist firefighting. Therefore, this paper presents the design of a firefighting robot dubbed that can extinguish fire without the need for fire fighters to be exposed to unnecessary danger. It is designed to be compact in size than other conventional fire-fighting robot to ease small location entry for deeper reach of extinguishing fire in narrow space. It is also equipped with an ultrasonic sensor to avoid it from hitting any obstacle and surrounding objects, while a flame sensor is attached for fire detection. This resulted in It demonstrating capabilities of identifying fire locations automatically and ability to extinguish fire remotely at distance

/pdf/fabrication-of-mini-fire-fighting-robot-2x264get.pdf

Fabrication of Mini Fire Fighting Robot


 
 The results demonstrate the effectiveness of wood apple shell particles in enhancing wear resistance, offering a sustainable alternative for composite reinforcement. This study aims to emphasize the benefits of agricultural waste utilization in material development, reducing waste while promoting sustainable industrial applications.
 
 
 
 In this experimental study, epoxy resin (LAPOX B11) is used. It is a medium-viscosity and unmodified polymer that falls under the epoxide category. It consists of bisphenol-A (DGEBA) which shows a viscosity range of 11,000–15,000 MPa·s at 25 °C. This resin is combined with hardener HY-951 (a compound based on 2-aminoethyl ethane-1,2-diamine) for curing purposes. Wood apple shell which is considered as waste materials is used to prepare wood apple particles. A ball milling machine is used to obtain particles from hard wood apple shells, Figure 1. The wood apple particles with varying weight percentage (0, 5, 10, 15 and 20 wt.%) are thoroughly mixed with epoxy and corresponding hardener. Sliding wear tests, Taguchi experimental studies and steady state studies are also carried out.
 
 
 
 The wood apple particles reinforced polymer composites with 20 wt.% filler content exhibited the minimum specific wear rate among all the fabricated composite samples. The factor combination of A3B2C3D3, that is, filler content of 15 wt.%, normal load of 20 N, sliding distance of 1,800 m and sliding velocity of 3 m/s will result in minimum specific wear rate. The parameters A (filler wt.%), C (sliding distance) and D (sliding velocity) has significant effect on specific wear rate. The scanning electron microscopic study exhibited the presence of micro-ploughing, micro-fracture, plastic deformation, formation of groves and pits over the surface of tested specimens which may be considered as the possible failure mechanism.
 
 
 
 Wear performance of polymer composites reinforced with wood apple shell particles is a new characterized composite which has better wear and strength factors. Also it forms the usage of Agricultural waste to resources.
 
 
 
 The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2025-0386/


Wear performance of polymer composites reinforced with wood apple shell particles

Agricultural waste fiber/filler composites: a review on physical, mechanical and wear behaviour

/pdf/design-and-analysis-of-mini-fire-fighting-robot-2bd8kyov.pdf

Design and Analysis of Mini Fire Fighting Robot

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