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Automated Composite Repair Robot

Omdat de composieten industrie een zeer snel groeiende industrie is, is de vraag naar kosteneffectieve onderhoudsmethoden groeiende. Deze toenemende vraag kan beantwoord worden met behulp van geautomatiseerde composieten reparatie. Het idee is om een robot arm uit te rusten met defect-detectie-systeem en een frees om een gevonden defect uit het materiaal te frezen. Dit idee is gebaseerd op een eerder onderzoek wat is uitgevoerd bij Inholland met als onderwerp het automatisch verwijderen van materiaal met een robot (RAAK2014-1-26M). Het commercieel potentieel is groot aangezien weinig tot geen van deze automatische reparaties worden aangeboden en de vraag steeds groter wordt aangezien composieten steeds meer worden toegepast. Na het onderzoek zal al dan niet een octrooi aanvraag worden verricht om vervolgens het onderzoek te publiceren. De doelstelling is het inzicht verkrijgen in de economische en technische haalbaarheid van dit product. Deze twee onderwerpen zullen worden onderzocht door twee afstudeer stagiaires en begeleid worden door Ruben van den Brink. Daarnaast kunnen een aantal deskundigen aanwezig in het laboratorium van Inholland Composites ook geraadpleegd worden. Hier is specialistische vakkennis aanwezig waarmee eventuele risico’s op expertise-tekort worden gemitigeerd.

Automatisering van het vacuüminfusieproces voor composiet

Biobonding, improved biocomposites through fibre treatment

Recent research by the renowned Royal Institution of Chartered Surveyors (RICS) shows that more than 2/3 of all CO2 is emitted during the building process and less than 1/3 during use to heat the building and the tap water. Lightweight, local and biobased materials such as biocomposites to replace concrete and fossil based cladding are in the framework of climate change, a necessity for future building. Using plant fiber in polymer composites is especially interesting for construction since natural fibers exhibit comparative good mechanical properties with small specific weight, which defines the potential for lightweight constructions. The use of renewable resources, will affect the ecosystem favorably and the production costs of construction materials could also decrease. However, one disadvantage of natural fibers in plastics is their hydrophilic properties. In construction the materials need to meet special requirements like the resistance against fluctuating weather conditions (Ticoalu et al., 2010). In contrast to synthetic fibers, the natural ones are more moisture- and UV-radiation-sensitive. That may lead to degradation of these materials and a decreasing in quality of products. (Lopez et al., 2006; Mokhothu und John, 2017) Tanatex and NPSP have approached CoE BBE/Avans to assist in a study where fibres impregnated with the (modified) Tanatex products will be used for reinforcement of thermoset biopolymers. The influence of the different Tanatex products on the moisture absorption of natural/cellulosic fibers and the adhesion on the fibers on main composite matrix will be measured. The effect of Tantex products can optimize the bonding reaction between the resin and the fibers in the (bio) composite and result to improved strength and physico-chemical properties of the biocomposite materials. (word count: 270)

BUILDING LIGHT- LIGHT AND SUSTAINABLE BIOCOMPOSITES FOR CONSTRUCTION

Buildings are responsible for approximately 40% of energy consumption and 36% of carbon dioxide (CO2) emissions in the EU, and the largest energy consumer in Europe (https://ec.europa.eu/energy). Recent research shows that more than 2/3 of all CO2 is emitted during the building process whereas less than 1/3 is emitted during use. Cement is the source of about 8% of the world's CO2 emissions and innovation to create a distributive change in building practices is urgently needed, according to Chatham House report (Lehne et al 2018). Therefore new sustainable materials must be developed to replace concrete and fossil based building materials. Lightweight biobased biocomposites are good candidates for claddings and many other non-bearing building structures. Biocarbon, also commonly known as Biochar, is a high-carbon, fine-grained solid that is produced through pyrolysis processes and currently mainly used for energy. Recently biocarbon has also gained attention for its potential value with in industrial applications such as composites (Giorcellia et al, 2018; Piri et.al, 2018). Addition of biocarbon in the biocomposites is likely to increase the UV-resistance and fire resistance of the materials and decrease hydrophilic nature of composites. Using biocarbon in polymer composites is also interesting because of its relatively low specific weight that will result to lighter composite materials. In this Building Light project the SMEs Torrgas and NPSP will collaborate with and Avans/CoE BBE in a feasibility study on the use of biocarbon in a NPSP biocomposite. The physicochemical properties and moisture absorption of the composites with biocarbon filler will be compared to the biocomposite obtained with the currently used calcium carbonate filler. These novel biocarbon-biocomposites are anticipated to have higher stability and lighter weight, hence resulting to a new, exciting building materials that will create new business opportunities for both of the SME partners.

Building on Mycelium

The climate change and depletion of the world’s raw materials are commonly acknowledged as the biggest societal challenges. Decreasing the energy use and the related use of fossil fuels and fossil based materials is imperative for the future. Currently 40% of the total European energy consumption and about 45% of the CO2 emissions are related to building construction and utilization (EC, 2015). Almost half of this energy is embodied in materials. Developing sustainable materials to find replacement for traditional building materials is therefore an increasingly important issue. Mycelium biocomposites have a high potential to replace the traditional fossil based building materials. Mycelium is the ‘root network’ of mushrooms, which acts as a natural glue to bind biomass. Mycelium grows through the biomass, which functions simultaneously as a growth substrate and a biocomposite matrix. Different organic residual streams such as straw, sawdust or other agricultural waste can be used as substrate, therefore mycelium biocomposites are totally natural, non-toxic, biological materials which can be grown locally and can be composted after usage (Jones et al., 2018). In the “Building On Mycelium” project Avans University of Applied Sciences, HZ University of Applied Sciences, University of Utrecht and the industrial partners will investigate how the locally available organic waste streams can be used to produce mycelium biocomposites with properties, which make them suitable for the building industry. In this project the focus will be on studying the use of the biocomposite as raw materials for the manufacturing of furniture or interior panels (insulation or acoustic).

Colouring Mycelium

To decrease the environmental impact caused by the construction sector, biobased materials need to be further developed to allow better integration and acceptance in the market. Mycelium composites are innovative products, with intrinsic properties which rise the attention of architects, designers and industrial companies. Until now, research has focused on the mechanical properties of mycelium products. The aim has been improving their mechanical strength, to achieve wider application in the construction sector. Alongside this, to introduce mycelium composites to a wider market, the aesthetic experience of the public also needs to be considered. In the context of this proposal, it is argued that users of biobased products can shift their attitudes towards their surroundings by adjusting to the visual aesthetics within their environment or products they surround themselves with (Hekkert, 1997). This can be further attributed to colours which can be experienced as warm or cold, aggressive or inviting, leading to experiences that may include pleasure or displeasure indicating the future success of the bio based product. Mycelium composites can be used as building materials, but also as interior design materials, therefore visible to its user. It is to determine the appropriate methodologies to confer colour to mycelium composites that the companies Impershield and Dorable came together to form the consortium for the present project. The investigated ways are: 1. Through the preliminary colouring of fibres and their use as substrate for mycelium growth 2. The surface treatment of the final product. The Centre of Expertise BioBased Economy (CoEBBE) and the Centre of Applied Research for Art and Design (CARADT) will be guiding the research through their experience with mycelium composites. This project will lay the basis to enhance visual appearance of mycelium composites, with the utilization of natural pigments, natural paints and coatings.