There has been much effort to provide eco-friendly and biodegradable materials for the next generation of composite products owing to global environmental concerns and increased awareness of renewable green resources. This review article uniquely highlights the use of green composites from natural fiber, particularly with regard to the development and characterization of chitosan, natural-fiber-reinforced chitosan biopolymer, chitosan blends, and chitosan nanocomposites. Natural fiber composites have a number of advantages such as durability, low cost, low weight, high specific strength, non-abrasiveness, equitably good mechanical properties, environmental friendliness, and biodegradability. Findings revealed that chitosan is a natural fiber that falls to the animal fiber category. As it has a biomaterial form, chitosan can be presented as hydrogels, sponges, film, and porous membrane. There are different processing methods in the preparation of chitosan composites such as solution and solvent casting, dipping and spray coating, freeze casting and drying, layer-by-layer preparation, and extrusion. It was also reported that the developed chitosan-based composites possess high thermal stability, as well as good chemical and physical properties. In these regards, chitosan-based “green” composites have wide applicability and potential in the industry of biomedicine, cosmetology, papermaking, wastewater treatment, agriculture, and pharmaceuticals.

New product development review article aims to consolidate the principles and current literature on design for sustainability to seek the field’s future direction. In this point of view, the design for sustainability methods can be established under the idea of sustainability in dimensions of ecology, economy and social pillars. Design for sustainability concept is implemented in concurrent engineering, including concept, embodiment and detail design processes. Integrating sustainability in engineering designs is crucial to producing greener products, system innovation, and services aligned with current market demand. Currently, many concurrent engineering studies related to natural fibre-reinforced polymer composites associated with sustainability enhance the application of design for sustainability techniques by professional designers. However, the current literature is scarce in bridging the design for sustainability concept with concurrent engineering during the design development stage, and these areas should be further developed. Several other future research directions, such as the need for aligning with principles and applications, along with exploring the relationships between the design for sustainability techniques and views of sustainability, are presented in this review paper.

In the era of globalisation, decreasing synthetic resources, especially petroleum, have encouraged global communities to apply biomass waste as a substitute material for green technology development. The development of plastic products from lignocellulosic fibre-reinforced composites has been a hot topic among material scientists and engineers due to their abundance, sustainable in nature, and less toxic towards health. For the Malaysian scenario, sugar palm is a plant found in the wild and locally planted in certain areas in Malaysia and Indonesia. Generally, sugar palm can be harvested for traditional foods, fruits, starch sugar (gula kabung), and alcohol, whereas sugar palm fibre (SPF) is used in conventional products (brushes and brooms). Various researchers are working on the characterisation of fibre and its composites for engineering and packaging products. The main drawback of SPF is its hydrophilic behaviour, which leads to high moisture uptake and inhibits a good bond between the fibre and the matrix. Thus, a solution for this problem is by implementing chemical treatments on the fibre. From the literature review, no comprehensive review paper has been published on the influence of chemical treatment on the mechanical behaviour of SPF-reinforced polymer composites. Thus, the present review examines recent studies on the mechanical properties of sugar palm lignocellulosic fibres with various chemical treatments to evaluate their potential in structural applications.

Biomimetics is the field of obtaining ideas from nature that can be applied in science, engineering, and medicine. The usefulness of cellulose nanocrystals (CNC) and their excellent characteristics in biomimetic applications are exciting and promising areas of present and future research. CNCs are bio-based nanostructured material that can be isolated from several natural biomasses. The CNCs are one-dimensional with a high aspect ratio. They possess high crystalline order and high chirality when they are allowed to assemble in concentrated dispersions. Recent studies have demonstrated that CNCs possess remarkable optical and chemical properties that can be used to fabricate liquid crystals. Research is present in the early stage to develop CNC-based solvent-free liquid crystals that behave like both crystalline solids and liquids and exhibit the phenomenon of birefringence in anisotropic media. All these characteristics are beneficial for several biomimetic applications. Moreover, the films of CNC show the property of iridescent colors, making it suitable for photonic applications in various devices, such as electro-optical devices and flat panel displays.

Education for the environment and sustainable development is the one important thing for being studied. At formal school in Indonesia, it was integrated into the subject matter like social science, natural science, geography, or biology. The study about geography education for promoting sustainability had not been thoroughly done in Indonesia. Therefore, this study examined and investigated articles about geography learning and sustainability in Indonesia from 2010 to 2020. The materials were searched through the Garuda and ERIC application, by using keywords related to geography education. It was selected to published articles in journals indexed by Scopus and Sinta. The data were analyzed by a qualitative method with a content analysis approach. The foci of analysis are topics of sustainability elements, learning methods and models, learning media and resources, and students’ assessment in geography learning. All of these were investigated in concern to their relationships and achievements to sustainable development goals (SDGs). As a result, the topics of geography education in Indonesia have contained three main elements of sustainability, namely environment which the most stated, then social, and economic. The learning model and method that was mostly used was outdoor learning with contextual method. The learning media that mostly mentioned were maps, while the learning resources were local wisdom. Aspects of students’ assessment that mostly studied in geography education for promoting sustainability were students’ knowledge, attitude, and skills. Overall, this study has shown that the topics related to sustainability elements contained in the articles on geography education in Indonesia includes their learning components.

Purpose: This paper aims to investigate the knowledge, attitude and behaviour of foundation chemistry learners concerning the sustainable development concept.Design/methodology/approach: Qualitative and quantitative studies were conducted. Atlas.ti software was used to analyse the chemistry curriculum based on selected themes and sub-themes. A survey was carried out involving 132 chemistry learners. The chemistry learners were students from a foundation programme in a local university located in Selangor, Malaysia. The collected data were analysed using SPSS 21.0 involving descriptive and inferential statistics.Findings: Document analysis on the chemistry curriculum shows that water is the theme most covered in the chemistry learners’ textbook, as compared to other themes. In general, the chemistry learners have good knowledge and attitude concerning the sustainable development concept. However, their knowledge and attitude do not reflect in their behaviour as an individual, as well as in the classroom. Moreover, their knowledge, attitude and behaviour focus more on environmental dimension, as compared to other sustainable development dimensions.Practical implications: This paper is instrumental in assisting educators to assess how chemistry learners perceive sustainable development, and this may help to bring about changes to improve chemistry teaching and learning processes towards education for sustainable development.Originality/value: This paper is an original and novel research paper which is first conducted on sustainable development concept in chemistry curriculum in Malaysia.