For a few hundred dollars, a bedroom can be refreshed with the latest flat-pack offerings. Wood particleboard furniture is affordable and generally easy to assemble, but particleboard is often held together with formaldehyde-based resins that make it hard or impossible to recycle. Now, with the help of science, old pressed-wood furnishings could be repurposed, and new modular decor could incorporate more environmentally friendly materials. Four articles published in ACS journals reveal how. Reporters can request free access to these papers by emailing newsroom@acs.org.
1. Adhesive-free particleboard joined by plant fibers. To bind wood chips together in particleboard, resins containing formaldehyde alternatives have been proposed, such as lignin or cellulose. Now, researchers reporting in ACS’ Nano Letters have developed plant macrofibers with tiny nanofibers on their surfaces (like pieces of yarn that have been roughed up) to ensnare and link the wood chips together. In demonstrations, particleboard made with the new macrofibers was strong, sound-absorbing and lighter than particleboard made with the other plant-based alternative resins.
2. Self-bonding bamboo fiberboard. Researchers in ACS Sustainable Chemistry & Engineering have developed a specialized bamboo fiber that forms a self-bonding fiberboard. Made from fast-growing bamboo, the board is strong and flexible, and it doesn’t use formaldehyde or other volatile organic compounds as a binder. The new material is held together by treating the bamboo fibers with tea polyphenols and cobalt ions, and then cross-linking the fibers’ hydroxyl and carboxyl functional groups with heat and pressure.
3. Thermal insulation made from cardboard. Thermal insulation for buildings is typically made from petrochemical-based polymers, such as polystyrene and polyurethane. Now, a study published in ACS Nano proposes a renewable foam made from discarded cardboard. The foam, manufactured with what the researchers call a one-pot synthesis strategy, is lightweight, temperature insulating and fire-resistant. These characteristics suggest the material could be an effective and sustainable insulation option for residential buildings.
4. Repairing joints with recycled wood. In an ACS Nano study, researchers propose using discarded wood materials, such as particleboard, to create hydrogels with mechanical properties similar to cartilage for the repair of joint defects and injuries. Demonstrations of the wood-derived hydrogel in animal models showed that it healed osteochondral injuries in femur joints significantly better than joints treated with traditional collagen gels at 12 weeks after injury onset. To the researchers’ knowledge, this is the first study investigating the use of wood in tissue engineering.
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