Current research progress on the mechanism and influencing factors of formaldehyde emission from wood-based panel is reviewed. The formaldehyde analysis and test methods are summarized, putting forward a new idea to research the relevance of formaldehyde emission and the loading ratio of wood-based panel under the combined action of influencing factors. The quantitative indicators of wood-based panel load in a specific space according to the formaldehyde emission requirements are determined, which provide technical precondition support to improve the interior decoration and furniture design.

Cellulose has attracted considerable attention as the most promising potential candidate raw material for the production of bio-based polymeric materials. In the last decade, significant progress has been made in the production of biopolymers based on different cellulose forms. In this study, cellulose was obtained in an innovative and environmentally friendly way, using boxwood powder. Crude cellulose was obtained by treating Buxus powder with an ethanol–acetic acid–water mixture. Refined cellulose was then obtained by treatment with an acidic sodium hypochlorite solution and alkaline hydrogen peroxide solution. The novel chemistry of cellulose prepared by this method promises to be not only green, but also highly desirable, because of its lower emissions and low cost. It is crucial for the future of the global polymer industry. The refined cellulose was subjected to a high-temperature hydrothermal treatment under two temperatures and time conditions, with temperature gradients of 120, 140, and 160 °C, and time gradients of 1, 2, and 3 h. The samples were subjected to infrared and thermogravimetric analyses. The cellulose undergoes dehydration and thermal degradation reactions during the heat treatment process, and the thermal stability of the residual is enhanced, compared with that of virgin cellulose. Between 120 and 140 °C, the hydroxyl and hypomethyl groups on the surface of cellulose are shed. Groups in the amorphous region of the polymer are the first to be shed. The dehydration reaction reduces the number of free hydroxyl groups on the surface of the cellulose molecules. The dehydration reaction was accelerated by an increase in temperature. Between 140 and 160 °C, the β-(1,4)-glycosidic bond begins to slowly break and some furans are generated. The structure of cellulose undergoes reorganization during thermal treatment. The thermal stability of the modified material is greater than that of untreated cellulose.

To shorten the measuring time of formaldehyde emissions from wood-based panels and reduce the costs of quality control processes during industrial furniture production, more efficient methods for measuring formaldehyde emissions from wood-based panels need to be developed. In this study, the formaldehyde emissions from 18-mm-thick veneered particleboard were measured using the desiccator method and the 1 m³ climate chamber method according to Chinese national standard GB/T17657-2013, and the correlation between these two methods was determined. Through a correlation analysis of 60 groups of data, the results indicated that the linear correlation coefficient (R) between two methods was 0.718, and the regression model was established, which by F and P values demonstrated a significant correlation at the 0.01 level of significance. As long as the quality of materials and the production processes remained consistent, the desiccator method was reliable enough for conducting routine quality control measurements of formaldehyde emissions from veneered boards of 18 mm thickness. In case of dispute, the results can be verified using the 1 m³ climate chamber method for accuracy.

In the context of high-quality development, environmental issues are being paid more and more attention to, and the release of free formaldehyde has become a major problem that needs to be solved. Glueless plywood mainly adopts natural substances as raw materials, without adding chemical products, such as resin adhesives, and it does not contain harmful substances, such as formaldehyde. Glueless plywood is a green product that causes no pollution in the environment and no harm to the human body. In this study, the corresponding weak-phase components in boxwood were pre-delivered by an acidic environmental treatment, and the high-temperature and high-pressure compacting process produced a glueless boxwood panel with excellent water resistance and mechanical properties, while remaining environmentally friendly.

Under the trend of increasing global aging, this study is based on the theory of mental model to conduct a study on the design of living environments for demented elderly, which is dedicated to meeting the special needs of this special group of demented elderly, improving their quality of life and self-care ability, and reducing the dependence on social medical and nursing resources to achieve the goal of social sustainability. The field research method was used to observe and record the behavior of elderly people with dementia in their homes, which included 20 elderly people aged 60–94 years with mild dementia; the ratio of male to female is 1:1. The Kawakita Jiro (KJ) method is used to extract a mental model of elderly people with dementia, obtain their subjective needs for the home environment, and propose related design principles. The research indicates that the mental space of elderly people with dementia regarding the home environment is mainly composed of three parts: information perception, environmental cognition, and environmental shaping. Based on this mental model, design principles of the home environment of elderly people with dementia are designed, aiming to improve their living experience via environmental information perception design, the enhancement of environmental cognition, and the reduction in the difficulty of shaping the environment.

The photocatalytic degradation of formaldehyde by graphite-like C₃N₄ is one of the most attractive and environmentally friendly strategies to address the significant threat to human health posed by indoor air pollutants. Despite its potential, this degradation process still faces issues with suboptimal efficiency, which may be attributed to the rapid recombination of photogenerated excitons and the broad band gap. As a proof of concept, a series of graphite-like C₃N₄@C₆₀ composites combining graphite-like C₃N₄ and C₆₀ was developed via an in situ generation strategy. The obtained graphite-like C₃N₄@C₆₀ composites exhibited a remarkable increase in the photocatalytic degradation efficiency of formaldehyde, of up to 99%, under visible light irradiation, outperforming pure graphite-like C₃N₄ and C₆₀. This may be due to the composites’ enhanced built-in electric field. Additionally, the proposed composites maintained a formaldehyde removal efficiency of 84% even after six cycles, highlighting their potential for indoor air purification and paving the way for the development of efficient photocatalysts.