In the housing market enormous challenges exist for the retrofitting of existing housing in combination with the ambition to realize new environmentally friendly and affordable dwellings. Bio-based building materials offer the possibility to use renewable resources in building and construction. The efficient use of bio-based building materials is desirable due to several potential advantages related to environmental and economic aspects e.g. CO2 fixation and additional value. The potential biodegradability of biomaterials however demands also in-novative solutions to avoid e.g. the use of environmental harmful substances. It is essential to use balanced technological solutions, which consider aspects like service life or technical per-formance as well as environmental aspects. Circular economy and biodiversity also play an im-portant role in these concepts and potential production chains. Other questions arise considering the interaction with other large biomass users e.g. food production. What will be the impact if we use more bio-based building materials with regard to biodiversity and resource availability? Does this create opportunities or risks for the increasing use of bio-based building materials or does intelligent use of biomass in building materials offer the possibility to apply still unused (bio) resources and use them as a carbon sink? Potential routes of intelligent usage of biomass as well as potential risks and disadvantages are highlighted and discussed in relation to resource efficiency and decoupling concept(s).
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Worldwide, plastic cups are used for serving drinks. Some typical examples of large-scale consumption are large concerts and festivals. As a part of the BIOCAS project, which focusses on the valorization of biomass through various routes, a PHA biobased festival cup was developed and created to reduce the impact of current fossil plastics. The role of VHL was to assess the environmental impact. The aim of the report is to inform the BIOCAS-partners about the use of plastic cups, and address the environmental impact in comparison with other types of biobased plastic cups and fossil-based cups. This report can serve as a basis for making choices within all different types of (plastic/biobased) cups. Besides, it can be used as a public communication tool about the environmental impact of different types of (plastic/biobased) cup applications.
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Dit boek is het resultaat van het SIA Raak MKB project “Biocomposieten voor civiele en bouwkundige toepassingen; Biobased brug”. Het is geschreven voor bedrijfsleven en studenten van het MBO, het HBO en de universiteiten. Het project leverde een haalbaarheidsonderzoek van een volledig biocomposieten voetgangersbrug. Materialenonderzoek bij Inholland Composites en stijfheid en sterkte berekeningen toonden aan dat een volledig biocomposieten voetgangersbrug haalbaar was. De Dommelbrug is met succes door ruim 100 studenten gebouwd.
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Stedelijke natuurversterking is bij uitstek een thema dat door de schalen heen moet worden bekeken. Van pocket park en gevelbekleding tot stedelijke groenstructuur, de biodiversiteit komt het beste tot bloei door samenhang.In het SIA-project Natuurinclusieve Gebiedsontwikkeling onderzochten vier hogescholen - Aeres Hogeschool, Avans Hogeschool, Hogeschool van Amsterdam en Hogeschool Van Hall Larenstein - drie schaalniveaus van gebiedsontwikkeling om de transitie naar natuurinclusieve gebiedsontwikkeling te versnellen. Gekoppeld aan drie casussen waren dit: gebouw (Spoorzone Waarder), straat (Knowledge Mile Park - KMP - Amsterdam), en gebied (Almere Centrum-Pampus). De casussen belichten veelvoorkomende typen ingrepen, zoals kleinschalige nieuwbouw, verbetering van de publieke ruimte, en binnenstedelijke woningbouw. Ondanks dat elke case een eigen thematisch zwaartepunt had - biobased materialen (Spoorzone Waarder), natuurlijke vergroening (KMP), en governance (Almere) - heeft via deelonderzoeken en tussen hogescholen kruisbestuiving plaatsgevonden. De white paper geeft de belangrijkste resultaten en lessen hiervan weer.Urban nature enhancement is a theme that needs to be considered across different scale levels. From pocket parks and façade greening to urban green infrastructure, biodiversity thrives best through connectivity.In the SIA-project Nature-inclusive Area Development, four universities of applied sciences - Aeres University of Applied Sciences, Avans UAS, Amsterdam UAS, and Van Hall Larenstein UAS- researched three scale levels of area development to accelerate the transition to nature-inclusive area development. This was linked to three case studies: Waarder Railway Zone (building), Knowledge Mile Park (KMP - street - Amsterdam), and Almere Centre-Pampus (area). The case studies represent common types of urban interventions, such as small-scale new developments, improvement of public space, and inner-city densification. Despite each case having its own thematic focus - biobased materials (Waarder Railway Zone), natural greening (KMP), and governance (Almere) - cross-pollination took place through sub-studies and collaboration between universities. The following pages present the main results and lessons learnt.
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People during this Covid-19 year were forced to spend more time at home due to the lockdown and extreme weather conditions. Before the crisis, people already spent approximately 90 percent of their time indoors and relied on nearby public outdoor spaces for social and physical activities to maintain their health and well-being. During the pandemic, unhealthy, overcrowded, uncomfortable outdoor public spaces and a lack of greenery likely encouraged people to stay indoors even more. In city centres, greenery is often scarce: municipalities struggle to find nature-based solutions that meet the multiple functions of these areas.Fortunately, pandemics appear to spur cities to create healthier, greener environments. The nineteenth-century cholera pandemics, for example, led many western cities to establish large public parks to act as green lungs. These include Central Park and Prospect Park in New York, designed by the influential landscape architect Frederick Law Olmsted. The Covid-19 crisis creates the momentum to bring nature back into our cities and to repair vital ecosystem functions and derived Urban Ecosystem Services (UESs).In this action-research study we adopted the Panarchy model and its principle that initiatives on a fine-grained scale can eventually have a positive impact on the entire ecosystem. Green interventions at street-level hold the promise that they may activate communities to initiate change for more social-ecological resilience. This paper describes two experimental projects: The Climate Cube, installed at a shopping centre in the Nieuw-West district in Amsterdam, and the Rewilding Stepping Stones in the centre of New Town Almere. The Climate Cube consists of a pergola, large, interconnected planter boxes, and benches on each side and acts as a cool social spot. The aim is to explore how it might improve visitors’ (thermal) comfort and to build community support before larger redevelopment projects are launched. The Rewilding Stepping Stones are made of biobased and recycled materials and planted with native species to encourage nature to return to the city centre.
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The problem of single-use personal protective equipment (PPE) made from non-renewable resources polluting the environment encouraged the creation of a circular face mask. The main factors that influence the design of a face mask that protects the user from COVID-19 were investigated. According to the findings, these are filtration, fit performance, and comfortability. Therefore, the two following goals were set for this project, to design a face mask (1) produced in the Netherlands using 50% local circular materials and 50% recyclable materials and (2) that perfectly fits men's and women’s faces
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Positioning paper bij de inauguratie van Vincent Voet als lector Circular Plastics.
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![People. Planet. Polymer: een Wereld te Winnen [Inaugurele rede]](https://publinova-harvester-content-prod.s3.amazonaws.com/thumbnails/files/previews/pdf/20250506132442742072.Positioning20Paper20Vincent20Voet202024-thumbnail-400x300.png)
Melt electrowriting (MEW) enables precise scaffold fabrication for biomedical applications. With a limited number of processable materials with short and tunable degradation times, polyhydroxyalkanoates (PHAs) present an interesting option. Here, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and a blend of PHBV and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (PHBV+P34HB) are successfully melt electrowritten into scaffolds with various architectures. PHBV+P34HB exhibits greater thermal stability, making it a superior printing material compared to PHBV in MEW. The PHBV+P34HB scaffolds subjected to enzymatic degradation show tunable degradation times, governed by enzyme dilution, incubation time, and scaffold surface area. PHBV+P34HB scaffolds seeded with human dermal fibroblasts (HDFs), demonstrate enhanced cell adherence, proliferation, and spreading. The HDFs, when exposed to the enzyme solutions and enzymatic degradation residues, show good viability and proliferation rates. Additionally, HDFs grown on enzymatically pre-incubated scaffolds do not show any difference in behavior compared those grown on control scaffolds. It is concluded that PHAs, as biobased materials with enzymatically tunable degradability rates, are an important addition to the already limited set of materials available for MEW technology.
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Op 28 maart 2024 vond de slotbijeenkomst van het project Natuurinclusieve Gebiedsontwikkeling plaats in het Natural Pavilion te Almere. Tijdens deze bijeenkomst werden de belangrijkste bevindingen en aanbevelingen per case gepresenteerd van twee jaar onderzoek met als hoogtepunt de presentatie van de whitepaper met natuurinclusieve uitgangspunten. Naast de presentaties was er een posterexpositie georganiseerd waarbij op de posters de belangrijkste uitkomsten van diverse deelonderzoeken werden gepresenteerd. De posters van onderzoekers en studenten zijn in deze publicatie gebundeld.
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