Juan Guo^*, Xiaoying Yu

Journal of Information Hiding and Privacy Protection, Vol.3, No.2, pp. 61-68, 2021, DOI:10.32604/jihpp.2021.017451

Abstract Mainly introduces intelligent classification trash can be dedicated to solving indoor household garbage classification. The trash can is based on AT89S52 single-chip microcomputer as the main control chip. The single-chip microcomputer realizes the intelligent classification of garbage by controlling the voice module, mechanical drive module, and infrared detection module. The use of voice control technology and infrared detection technology makes the trash can have voice control and overflow alarm functions. The design has the advantages of simple and intelligent operation, simple structure, stable performance, low investment, etc., which can further effectively isolate people and garbage, reduce human infection with bacteria,… More >

Shanshan Liu¹, Yukun Cao¹, Lu Gao¹, Jian Xu^1,2,*, Wu Zeng^1,2

Journal of Information Hiding and Privacy Protection, Vol.3, No.2, pp. 55-59, 2021, DOI:10.32604/jihpp.2021.017254

Abstract With the development of computation technology, the augmented reality (AR) is widely applied in many fields as well as the image recognition. However, the AR application on mobile platform is not developed enough in the past decades due to the capability of the mobile processors. In recent years, the performance of mobile processors has changed rapidly, which makes it comparable to the desktop processors. This paper proposed and realized an AR system to be used on the Android mobile platform based on the image recognition through EasyAR engine and Unity 3D development tools. In this system, the image recognition could… More >

Dafni Foti¹, Eleni E. Voulgaridou¹, Sotirios Karastergiou², Hamid R. Taghiyari³, Antonios N. Papadopoulos^1,*

Journal of Renewable Materials, Vol.10, No.1, pp. 75-88, 2022, DOI:10.32604/jrm.2022.017759

Abstract The development of alternative wood composites based on the use of waste or recycled materials can be beneficial due to over exploitation of natural resources. Under this frame, an option for the successful utilization of waste polystyrene which avoids environmental problems that formaldehyde adhesives cause and also reduces waste disposal, is its potential application as a binder for the production of value-added environmentally friendly and low cost wood composites. Two types of panel were successfully made, consisting of wood dust and two recycled polystyrene contents, namely, 15% and 30%. Both physical properties, water absorption and thickness swelling, and mechanical properties,… More > Graphic Abstract

Zhenzhen Zhang¹, Kai Lan^2,*

Journal of Renewable Materials, Vol.10, No.1, pp. 53-73, 2022, DOI:10.32604/jrm.2022.017506

Abstract Understanding the economic feasibility of cross-laminated timber (CLT), an emerging and sustainable alternative to concrete and steel, is critical for the rapid expansion of the mass timber industry. However, previous studies on economic performance of CLT have not fully considered the variations in the feedstock, plant capacities, manufacturing parameters, and capital and operating costs. This study fills this gap by developing a techno-economic analysis of producing CLT panels in the Southern United States. The effects of those variations on minimum selling price (MSP) of CLT panels are explored by Monte Carlo simulation. The results show that, across all the plant… More >

Freddy Muñoz¹, Carolina Tenorio¹, Róger Moya^1,*, Angel Navarro-Mora²

Journal of Renewable Materials, Vol.10, No.1, pp. 1-17, 2022, DOI:10.32604/jrm.2022.017392

Abstract Fabrication and use of Cross Laminated Timber (CLT) using tropical woods is still limited at present. Therefore objective of the present study aims to determine the possibility of using CLT panels of 3 and 5 layers, fabricated with Tectona grandis and Gmelina arborea wood using adhesive of isocyanate polymer emulsion system catalyzed with polymeric isocyanate. Delamination, water absorption, density, flexure test, compression and glue-line shear were evaluated using ANSI/APA PRG320-2012 ASTM D198 and ASTM D4761 standard. The results showed that CLT panels of T. grandis presented higher values of density, less water absorption and lower delamination, with no evident differences… More >

Deniz Sema Sarul¹, Dogan Arslan², Emre Vatansever¹, Yusuf Kahraman², Ali Durmus³, Reza Salehiyan⁴, Mohammadreza Nofar^1,2,*

Journal of Renewable Materials, Vol.10, No.1, pp. 149-164, 2022, DOI:10.32604/jrm.2022.017003

Abstract Polylactide (PLA)/poly (butylene adipate-co-terephthalate) (PBAT) blend nanocomposites including 3 wt% of cellulose nanocrystals (CNCs) were prepared by melt compounding method in a twin-screw extruder and an internal mixer. Blend nanocomposites were formulated by diluting three different masterbatches prepared by solution casting method that contained 7 wt% of CNC. These masterbatches were: (m1) PLA/PBAT/CNC masterbatch; (m2) PLA/CNC masterbatch; and (m3) PBAT/CNC masterbatch. These were to explore how different preparation methods affect the dispersion and localization of CNC and hence the properties of PLA/PBAT/CNC blend nanocomposites. Scanning electron microscopy (SEM) was used to study the structural changes of the blends. Rheological properties… More >

Shaoxiang Cai¹, Yuliang Guo¹, Yanjun Li^2,*

Journal of Renewable Materials, Vol.10, No.1, pp. 119-133, 2022, DOI:10.32604/jrm.2022.016260

Abstract In this study, Pinus massoniana Lamb at different heights, across the annual rings, and between earlywood and latewood was measured by X-ray diffraction and the chemical composition was analyzed by chemical treatment. Results indicated that the microfibril angle (MFA) decreased and the chemical composition changed little with the increase in height from 1 m to 9 m. In the radial direction, the MFA decreased and the chemical composition changed little with an increase in annual rings. The cellulose content of latewood was higher than that of earlywood. The viscoelastic changes of wood cell walls at different heights, across the annual rings by… More >

Ke Zhou^1,2, Haitao Li^1,2,*, Assima Dauletbek^1,2, Dong Yang^1,2, Zhenhua Xiong³, Rodolfo Lorenzo⁴, Kun Zhou⁵, Ileana Corbi⁶, Ottavia Corbi⁶

Journal of Renewable Materials, Vol.10, No.1, pp. 165-182, 2022, DOI:10.32604/jrm.2021.017223

Abstract Eccentric compression tests on 15 chamfered laminated bamboo lumber (LBL) columns with a height ranging from 600 to 3000 mm were conducted in order to study the eccentric mechanical performance. The failure of all specimens was caused by the crack of bamboo fiber in the tensile region. When the ultimate strength was reached, except specimens with a height of 600 mm, all other specimens could bear large deformation, showing good ductility. The lateral displacements of the specimens under eccentric compression were approximately parabolic in the direction of column height. The ultimate bending moment of LBL columns with different slenderness ratios… More >

Yuhao Jiang, Jialan Yao, Chengfei Zhu^*

Journal of Renewable Materials, Vol.10, No.1, pp. 135-148, 2022, DOI:10.32604/jrm.2021.016304

Abstract Poly(urea-formaldehyde) (PUF) microcapsules were prepared by in-situ polymerization with four different processes in this paper. The chemical composition, surface morphology, particle size distribution, and thermal stability were characterized by FTIR, SEM, particle size analyzer, and TGA, respectively. The results demonstrated that the agglomeration of the PUF microcapsules was related to the agglomeration of the emulsion particles caused by the changes of emulsion interface during the shell polymerization. Due to the slow deposition of the shell material, the PUF microcapsules with the core-shell structure prepared by the process with ammonium chloride as the last additive showed good dispersibility with an average… More > Graphic Abstract

Yousef Y. Sewar¹, Zhancheng Zhang¹, Xinmiao Meng^1,*, Mohammed Y. Wahan¹, Hanxiao Qi^1,2, Qahtan M. Al-Shami^1,3, Shijiao Luo¹

Journal of Renewable Materials, Vol.10, No.1, pp. 219-235, 2022, DOI:10.32604/jrm.2021.016013

Abstract Engineered bamboo has recently received lots of attention of civil engineers and professional researchers due to its better mechanical performance than that of softwood timber. Parallel strand bamboo is one important part of engineered bamboo for its excellent durable performance compared to the laminated veneer bamboo. The required curing temperature in hot-pressing process is usually higher than 120°C to reduce the content of nutritional ingredients and hemy cellulose, and to avoid the decay from the environment and insects. Nonetheless, the appearance of engineered bamboo gets darker with the increase of temperature during the hot-pressing process. In order to minimize the… More > Graphic Abstract