We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Flame-Retardant and Fire-Sensing Packaging Papers Enabled by Diffusion-Driven Self-Assembly of Graphene Oxide and Branched Polyethyleneimine Coatings
AI summary Read the abstract
This paper is not about microplastics; it describes a technique for coating paper packaging with graphene oxide layers to make it flame-retardant and capable of triggering fire alarms.
Paper has gained popularity as a packaging material due to its reduced environmental impact compared with non-degradable alternatives. However, its flammability poses safety risks, prompting research on enhancing its flame retardancy. This work introduces a diffusion-driven self-assembly strategy (DDSAS) to create a functional graphene oxide (GO) coating on various packaging papers. DDSAS involves infiltrating the paper’s cellulose microfiber network with branched polyethyleneimine (b-PEI), which binds firmly to cellulose microfibers. Electrostatic interactions between GO and b-PEI then drive GO assembly into a densely stacked, layered structure on the paper surface. This GO structure provides a physical barrier against flames and generates incombustible gases (CO2, H2O, NO2, and NO) when heated, diluting the surrounding oxygen concentration and acting as a heat insulation layer. These factors increase the flame retardancy of treated papers ten-fold. Additionally, the gradual reduction of GO upon heating forms reduced graphene oxide (rGO) on the paper, significantly increasing its electrical conductivity. As a result, the flame-retardant papers not only prevent the fire from spreading but can also act as fire sensors by triggering an alarm signal at the early stages of contact with fire. In summary, this work offers a rational strategy for designing and manufacturing flame-retardant paper packaging materials.
More Papers Like This
Microplastic Strength Increased by Using Graphene Oxide to Modify Aramid Filler
AI summary Read the abstract
Researchers demonstrated that treating aramid fiber fillers with graphene oxide before incorporating them into epoxide resin composites increased the resulting material's tensile strength by up to 13.36%, from 5.511 to 6.247 GPa. Producing stronger, more durable composite materials can extend product lifespans and reduce the mechanical wear and fragmentation that generates microplastic particles during use.
Boosting the ultraviolet shielding and thermal retardancy properties of unsaturated polyester resin by employing electrochemically exfoliated e-GO nanosheets
AI summary Read the abstract
Researchers prepared unsaturated polyester resin nanocomposites with electrochemically exfoliated graphene oxide at varying concentrations, finding that even small additions of e-GO improved mechanical properties, thermal stability, and UV shielding performance.
Starch-based biocomposite films and coatings in paper-based food packaging: a review
AI summary Read the abstract
Researchers reviewed starch-based biocomposite films as a plastic-free alternative for food packaging, concluding that while these materials are promising for reducing microplastic pollution, they still have significant weaknesses in heat resistance, moisture barriers, and mechanical strength that must be addressed before wide commercial use.
Sustainable approaches for integrating intrinsic self-healing polymer coatings into food packaging systems
AI summary Read the abstract
This review examines self-healing biopolymer coatings for food packaging, highlighting their potential to autonomously repair mechanical damage and extend the functional lifespan of biodegradable materials while reducing microplastic fragment generation from degraded packaging. Standardized methods for quantifying multi-cycle healing performance are identified as the key barrier to translating these materials from laboratory research to commercial food packaging applications.
New alternatives to single‐use plastics: Starch and chitosan‐graft‐polydimethylsiloxane‐coated paper for water‐ and oil‐resistant applications
AI summary Read the abstract
Researchers developed a fluorine-free, bio-based paper coating using starch and chitosan grafted with polydimethylsiloxane, achieving water- and oil-resistance comparable to conventional fluorochemical coatings while remaining biodegradable and compostable.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.