11.Invited – Cellulose-based electrical sensor and their applications in healthcare and food systems
Celluose is a plant-derived abundant biopolymer that has been used in a variety of applications ranging from woven and non-woven fabrics to threads and food additives. Because cellulose-based sensors can be manufactured inexpensively, they are a hidden gem for producing large quantities of data that can be used for training machine learning models to provide […]
11.5 Printed circuit board substrates derived from lignocellulose nanofibrils
The growing problem of electronic waste poses an environmental challenge due to petroleum-based materials and toxic metals. Recycling e-waste is complex and costly due to numerous components requiring separation. Using bio-based, biodegradable materials for printed circuit board (PCB) substrates simplifies PCB component separation and improves environmental impact [1]. Hornified cellulose fibrils are promising PCB substrates […]
11.4 Printed electronics directly on wood veneers
Sustainability is becoming an increasingly crucial focus across various industries, reigniting interest in wood as a material. The major objective of this project is to pave the way for the transition of wood from a conventionally utilized resource to a highly functional and, at the same time, aesthetic material. From this transformation, wood will emerge […]
11.6 Fabrication of Lignosulfonate-Based Supercapacitor Electrodes through Self-Activation and Two-Step CO₂ Activation with Plasma Treatment
In this study, we aim to promote the valorization of technical lignin derived from the pulp and paper industry and develop sustainable and environmentally friendly energy storage devices. Lignosulfonate was used as a precursor, and two different approaches were employed: self-activation and two-stage CO2 physical activation, producing porous carbon (PC) and lignosulfonate-activated carbon (LSAC), respectively. […]
11.3 Energy-regulating cellulose-based optical materials
This presentation focuses on our research on cellulose-based energy-regulating optical materials. Cellulose is highly interesting for optical applications because it is inherently non-absorptive in the visible and can therefore be designed via structure or additives to provide desired reflection, transparency, and coloration. Cellulose further strongly absorbs infrared light in the thermal spectral range around 10 […]
11.2 Salt-in-Wood Piezoelectric Power Generators
The nanowatt-level power density of current biobased piezoelectric energy harvesters restricts their applicative potential for the efficient conversion of biomechanical energy. We demonstrate a high-performing, renewable piezoelectric device incorporating green piezo-active Rochelle salt in a laser-drilled wood template to form crystal pillar arrays. By investigating the effect of different crystal pillar configurations on the piezoelectric […]
11.1 Production of electrical conductive paper materials
We have demonstrated that electrical conductive paper can be produced by traditional roll-to-roll papermaking as well as by wet moulding. The former allows for more efficient production where as the latter allows for more flexible production and the formation of 3D shaped materials. A key aspect of the production is the retention of the electrical […]
P11.1 – Enhancing plant growth with wood-based electronics
The globally rising population results in an increasing food demand. In parallel, the changing climate results in higher demands for sustainable crop cultivation and agriculture. Hydroponic cultivation minimizes water and fertilizer use while maximizing food production in limited urban spaces.(1) Commercially available hydroponic substrates, often produced from non-sustainable materials, primarily provide mechanical support.(2) To address […]
P11.2 – Anisotropic BNNS Network Guided by Cellulose Nanofibers for Highly Thermal Conductive Nanocomposites in Portable electronics
Efficient heat dissipation through thermal interface materials is a critical challenge in the advancement of modern microelectronic devices. Traditional polymer composites, even when loaded with highly thermally conductive fillers, often exhibit limited thermal conductivity due to the absence of effective heat transfer pathways. In this study, vertically aligned and interconnected boron nitride (BN) networks are […]
P11.3 – Tuning Triboelectric Properties of Regenerated Cellulose with Graphene: A Path to Higher Power Output via Bulk Modification
Triboelectric nanogenerators (TENGs) convert mechanical energy from surface friction induced by motions into electrical energy through contact electrification and electrostatic induction. These devices harvest energy from materials with different electron affinities to power small electronics and sensors [1]. Our research group at Mid Sweden University demonstrated that regenerated cellulose (R-cellulose) films are a suitable tribomaterial due […]
