Drvna Industrija最新文献_第4页

Potential Use of Olive Stone Residues in Particleboard Production 橄榄石残留物在刨花板生产中的潜在用途

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-06-20 DOI: 10.5552/drvind.2023.0047

G. Nemli, U. Aras, Hülya Kalaycoglu, Suleyman Kustas

{"title":"Potential Use of Olive Stone Residues in Particleboard Production","authors":"G. Nemli, U. Aras, Hülya Kalaycoglu, Suleyman Kustas","doi":"10.5552/drvind.2023.0047","DOIUrl":"https://doi.org/10.5552/drvind.2023.0047","url":null,"abstract":"In this study, the effect of using olive stone residues (OSR) on some properties of particleboard was investigated. For this purpose, particle boards were manufactured from particles of white poplar (Populus Alba L.), which were partially substituted with OSR particles in amounts of 10 %, 20 % and 30 %. In addition, boards containing 30 % OSR, which had previously been chemically modified with NaOH solution, were produced. Phenol formaldehyde adhesive was used in the production of the boards. Chemical properties of wood and OSR particles (pH, alcohol benzene solubility, amount of ash), physico-mechanical properties (density, moisture content thickness swelling, modulus of rupture, modulus of elasticity and internal bond strength) and formaldehyde emission values of boards were determined. Water absorption and thickness swelling values were generally decreased with the increase in the use of OSR. When the effect of OSR usage on bending strength, modulus of elasticity, and perpendicular tensile strength values were examined, a decrease in the values was observed except for the 10 % OSR usage ratio. As a result of the application of alkali pretreatment, an increase in thickness swelling values was observed, while the values of mechanical properties increased. Scanning electron microscopy (SEM) analysis results showed more spaces between particles with an increasing OSR usage ratio. Formaldehyde emission values decreased with the increasing amount of OSR. Formaldehyde emission values increased slightly with the application of alkaline pretreatment. Based on the findings of this study, we can conclude that OSR can be used at particularly low ratio in particleboard production.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43806357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research of Carbon Biosensors for Application in Seating Furniture 碳生物传感器在座椅家具中的应用研究

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-06-20 DOI: 10.5552/drvind.2023.0089

Z. Vlaović, Vid Palalić, D. Domljan

{"title":"Research of Carbon Biosensors for Application in Seating Furniture","authors":"Z. Vlaović, Vid Palalić, D. Domljan","doi":"10.5552/drvind.2023.0089","DOIUrl":"https://doi.org/10.5552/drvind.2023.0089","url":null,"abstract":"The paper provides a limited overview of existing pressure sensors based on composite technology from carbonized biomass and synthetic materials which could be implemented in seating furniture. Carbon-based pressure sensors have proven to be good for pressure measurement that works on the principle of the piezoresistive effect. Research on materials based on carbonized components of biological origin encourages the development of composite sensors made of different materials, which have different negative and positive properties. Despite the great potential, such sensors are still not sufficiently researched and there is a lot of space for their improvement. Today’s rapid development of technologies and frequent work at the computer leads to excessive sitting while working, which is a big problem for human health. Chairs with sensors could be increasingly used in the future, and in combination with the Internet of Things could be used to monitor the sitting habits and health of users. Sensors implemented in seating furniture are one way of monitoring sitting habits, warning users of inappropriate body positions when sitting, and mitigating the negative consequences of long-term improper sitting. The paper analyses research that includes the production and application of sensors made of carbonized bio-materials, which could be used in seating furniture with the aim of monitoring the way of sitting based on the principle of pressure detection. So far, the results have not provided the requested answers. However, they provided an overview of technologies that, with additional research, likely have the potential to be incorporated into seating furniture.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44598985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Obojenje lakova za namještaj s biljnim bojilima i određivanje njihove otpornosti na vremenske utjecaje

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-06-20 DOI: 10.5552/drvind.2023.0050

Osman Goktas, Yasar Tahsin Bozkaya, Mehmet Yeniocak

{"title":"Obojenje lakova za namještaj s biljnim bojilima i određivanje njihove otpornosti na vremenske utjecaje","authors":"Osman Goktas, Yasar Tahsin Bozkaya, Mehmet Yeniocak","doi":"10.5552/drvind.2023.0050","DOIUrl":"https://doi.org/10.5552/drvind.2023.0050","url":null,"abstract":"The main goal of the study is to produce eco-friendly furniture dyes by using bio-colorants and to determine the color stability of these dyes in outdoor conditions. In this regard, dye extracts obtained from red beet (Beta vulgaris), safflower (Carthamus tinctorius L.), and purple cabbage (Brassica oleracea), as a bio-colorant source, were applied to MDF test panels by mixing with water-based synthetic lacquer coatings. Also, three different synthetic dyes were applied to MDF test panels in order to compare the results with eco-friendly natural dyes. Natural dyes were mixed with metal and natural mordants such as iron sulfate, aluminum sulfate and vinegar. Lacquer coated test panels, coated with natural and synthetic dyes, were exposed to outdoor conditions for 50 days in Denizli/Turkey in order to assess the change in color. As a result, the maximum color stability occurred in the test panels lacquer coated with synthetic black dye, while the minimum color stability occurred in the test panels lacquer coated with synthetic light blue dye. It was determined that the thickness of the color coating layer applied to test panels increases color stability. It was also observed that the color stability performance of natural dyes is as good as that of synthetic dyes.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42775156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plywood Cantilever Deflection 胶合板悬臂挠度

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0053

Alma Žiga, J. Kačmarčik

引用次数: 0

Sinteza fenolne smole ojačane nanočesticama TiO2 i njezin utjecaj na gorivost lamelirane drvne građe (LVL) 纳米TiO2增强苯酚盐的合成及其对木材燃料的影响

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0006

Günay Özbay, Musa Atar, Ayhan Ozcifci

{"title":"Sinteza fenolne smole ojačane nanočesticama TiO2 i njezin utjecaj na gorivost lamelirane drvne građe (LVL)","authors":"Günay Özbay, Musa Atar, Ayhan Ozcifci","doi":"10.5552/drvind.2023.0006","DOIUrl":"https://doi.org/10.5552/drvind.2023.0006","url":null,"abstract":"In this study, phenol-formaldehyde (PF) resin has been modified with titanium dioxide nanoparticles (nano-TiO2) at a varying ratio from 0.05 wt.% to 1.5 wt.% to enhance the thermal properties and combustion performance of the resins. The effect of the nano-TiO2 modification on the properties (chemical or thermal) of the resins was determined by Fourier to transform infrared (FT-IR) and thermal analysis (TGA) techniques. In addition, the combustion performance of laminated veneer lumber (LVL) samples bonded with the PF resin modified with nano-TiO2 was tested. The result of the FT-IR analysis indicated that the modified PF resins had match peaks to the reference PF resin. These similarities of the peaks supported that the modified PF resins were successfully synthesise with phenol, formaldehyde, and nano-TiO2. The PF resins modified by nano-TiO2 demonstrated better thermal stability than the reference resin. The nano-TiO2 modified PF resin exhibited a favourable influence on the combustion characteristics of LVL. In consequence, PF resin modified with nano-TiO2 could be used as a combustion retardant adhesive in the wood industry.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43670841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utjecaj različitih vrsta modifikacije na izvlačnu silu rotacijski zavarenih moždanika 不同修饰对旋转障碍提取力的影响

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0087

Ivica Župčić, Igor Đukić, Matija Jug, Mario Jurišić, Marin Hasan

引用次数: 0

Čimbenici koji utječu na proces savijanja cjelovitog drva Čimbenici koji utječu na proces savijanja cjelovitog drva

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0020

Mislav Mikšik, Stjepan Pervan, Miljenko Klarić, Anita Čavlović, Nikola Španić, Silvana Prekrat

引用次数: 1

Boron Compounds-Added Kraft Pulping from Scots Pine 硼化合物-添加苏格兰松硫酸盐纸浆

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0014

Suleyman Kustas, S. K. Gülsoy

引用次数: 1

Bending Moment of Mortise-and-Tenon Joints in a Crossed Chair Base 交叉椅座榫卯节点的弯矩

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0004

{"title":"Bending Moment of Mortise-and-Tenon Joints in a Crossed Chair Base","authors":"","doi":"10.5552/drvind.2023.0004","DOIUrl":"https://doi.org/10.5552/drvind.2023.0004","url":null,"abstract":"This paper investigated the bending moment of chair base joints. The ultimate bending moments (maximum moment), calculated on the base of the measured maximum applied loads (maximum force), were compared for the front leg and rear leg joints of a chair base. The joints had different angles between the stretcher and the leg (joint angle) as well different tenon lengths (30 mm and 32 mm). The results of the tests indicated that for different test specimen configurations but the same tenon-and-mortise geometry, the maximum force of joints with a smaller value of joint angle (front leg joints) was higher than the force values of joints with a larger angle (rear leg joints) for all tenon lengths. However, the results showed less difference among the calculated bending moments of the analysed sets of joints. A significant difference was not revealed between the bending moments of joints with a smaller value of joint angle and the bending moments of joints with a larger angle for all tenon lengths. A significant difference between the bending moments for the tenon length of 30 mm and tenon length of 32 mm was determined for rear leg joints but not for front leg joints. The presented approach of joint strength analysis through the testing of specimens with different shapes and dimensions are applicable to research and practice.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45822053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Strukturne i projektirane vrijednosti lameliranih greda i greda od cjelovitog drva Dipteryx panamensis i Hieronyma alchorneoides s brzorastućih plantaža 具有快速种植园的人参和山毛细枝和细枝的结构和设计价值

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-03-25 DOI: 10.5552/drvind.2023.0007

Róger Moya, Carolina Tenorio, Angel Navarro-Mora, Freddy Munoz

{"title":"Strukturne i projektirane vrijednosti lameliranih greda i greda od cjelovitog drva Dipteryx panamensis i Hieronyma alchorneoides s brzorastućih plantaža","authors":"Róger Moya, Carolina Tenorio, Angel Navarro-Mora, Freddy Munoz","doi":"10.5552/drvind.2023.0007","DOIUrl":"https://doi.org/10.5552/drvind.2023.0007","url":null,"abstract":"Dipteryx panamensis and Hieronyma alchorneoides are two species of high specific gravity used in reforestation programs in Costa Rica, but they lack products with structural value for commercialization. In order to introduce the wood of these two species in the market, the objective was established to study the behavior of solid timber beams and glued laminated timber beams of two cross sections (2 cm × 10 cm and 2 cm × 15 cm) and establish the design values in bending test. The results showed that the bending design values (fb) ranged from 2 to 26 MPa in glued laminated timber beams, while in solid timber beams, fb ranged from 6 to 15 MPa. In the shear design values (fv), the variation was from 0.29 to 0.67 MPa in glue laminated timber beams and from 1.80 to 2.58 MPa in solid timber beams. It was also found that the D. panamensis beams showed higher values than H. alchornoides beams. Finally, it was established that glued laminated timber beams showed better performance in bending parameters and higher design values, resulting in wider span values, than solid timber beams when used in floor and roof construction.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45076329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0