Development of biodegradable biomass board and its mechanical properties using rice straw

• Material Type: 博士論文
• Title: Development of biodegradable biomass board and its mechanical properties using rice straw
• Author/Editor: Zhang, Jin
• Author Heading: Zhang, Jin
• Publication, Distribution, etc.: 三重大学
• Publication Date: 2016-09-21
• Publication Date (W3CDTF): 2016-09-21
• Alternative Title: 稲ワラを用いた生分解可能なバイオマスボードの開発及びその強度に関する研究
• Degree grantor/type: 三重大学
• Date Granted: 2016-09-21
• Date Granted (W3CDTF): 2016-09-21
• Dissertation Number: 甲学術第1805号
• Degree Type: 博士(学術)
• Conferring No. (Dissertation): 甲学術第1805号
• Text Language Code: eng
• Alias of Author: チョウ, キン; 張, 瑾
• Subject Heading: rice straw; biomass; biodegradable; rupture stress; cellulose
• Target Audience: 一般
• Note (General): application/pdf; With the rapid development of global economy, the supply of timber has been unable to meet the demand of economic development. At the same time, the rapid development of the economy led to oil and other fossil energy crisis, and plastics products are popular used in common life, which brought a very bad result called ""the white pollution"". It is serious harmful for human’s health and natural environment. Therefore, composite materials with high performance, multi-function, and high added value, more and more eagerly need for human life and social development. Biomass material means that it is produced by renewable raw materials, which is the product of plant photosynthesis with carbon dioxide, and it can be degraded into water and carbon dioxide by microbial or light, or through the compost for fertilizer as natural polymers. Crop straw is considered as one kind of excellent biomass materials sources. At present, crop straws is faced the phenomenon with high yield, low utilization rate. But if it can be made into biomass board and could be used for agriculture, packaging industry, construction industry to replace wood products and plastic products. It is not only can ease the timber supply pressure, but also relieve the oil and other fossil energy supply pressure, and reduce plastic pollution to the environment, of course, the crop straws resources are more efficiently utilized. The research is based on the conception of sustainable development and circular economic, refers to describe the process of make an environment-friendly, complete degradation of biomass material from the agricultural waste rice straw as raw material. There are two methods to produce the biomass board: physical and chemical methods. This study adopted the physical method. The making process of biomass board was cutting, soaking, refining, forming and drying. The making method as follow; At first, the rice straw was cut into small chips about 20mm by an ordinary cutter. Secondly, the chips were immersed water for 96 hours at room temperature. Then, the mixture of rice straw chips and water was refined by an electric refining device for 10 minutes. The fourth process was forming and drying. A compression mold was made into square with dimensions of 100 mm in length, 100 mm in width, 40 mm in depth for forming and drying. The whole forming and drying process took 2 hours and the experimental condition was 5 kinds of pressures from 2MPa to 8MPa and the drying temperature was 110℃. Finally, the rice straw pulp was made into a board which was named biomass board. 2 pieces of biomass boards were made under every experimental condition. As a result, 10 pieces of biomass boards were made successfully under 5 kinds of experimental conditions. In addition, the densities and moisture contents of biomass boards were measured. The density was in the range of 0.785g/cm3～0.849g/cm3. The moisture content was in the range of 5.25%～7.16%. In order to investigate the appliance scope of biomass board, experiments measured mechanical properties which were three-point bending test and tensile test were carried out in this study. The experimental results show that the rupture stress of bending test was in the range of 9.73MPa～20.28MPa and the rupture stress of tensile test was in the range of 6.43MPa～10.89MPa. The results of this study showed that the biomass board was made successfully using the proposed method without any chemical adhesives or chemical reagents and the biomass board had enough mechanical strength. And then, this study further explored the heating temperature influence of the strength of the biomass board. The experimental condition was that the pressure was the same of 5MPa but the heating temperatures were 110℃、130℃、150℃、170℃、190℃. The results of this study showed that the densities were in the range of 0.83 g/cm3～0.91 g/cm3 , the moisture contents were in the range of 3.78%～7.00%, the rupture stresses of bending test were in the range of 13.35MPa～19.62MPa and the rupture stresses of tensile test were in the range of 3.00MPa～17.22MPa. The results indicated that heating temperature affected the strength of the biomass board. The rupture stress increased with the increase of heating temperature. In addition, the effect of different fiber length on mechanical properties of biomass board was investigated. The fiber length was 3 kinds which were 0mm<SF≤2.0mm, 2.0mm<MF≤4.0mm, 4.0mm<LF≤5.6mm. As in the above experimental conditions, the pressures were 2MPa, 3.5MPa, 5MPa, 6.5MPa, 8MPa and heating temperatures were all 110℃. The results of this study showed that the densities were in the range of 0.89 g/cm3～1.02 g/cm3 and 0.98g/cm3～1.13g/cm3 the moisture contents were in the range of 5.68%～6.46% and 5.66%~6.37%. And in the bending test, the SF biomass boards’ rupture stresses were in the range of 15.15MPa～45.03MPa and the LF biomass boards’ rupture stresses were in the range of 8.85MPa～35.97 MPa. In the tensile test, , the SF biomass boards’ rupture stresses were in the range of 6.32MPa～33.11MPa and the LF biomass boards’ rupture stresses were in the range of 4.54MPa～11.80MPa. From the result of this study, the rice straw biomass board was made successfully using the proposal method. The making process including cutting, soaking, refining, forming and drying was appropriate. No chemical adhesives or chemical compounds were added in whole making process of biomass board. The biomass board made in this study is biodegradable and has enough mechanical strength, which is an environment-friendly material. Above all, the biomass board can replace wood products and plastic products in some place, and has broad application prospects in the production of plastic film, packaging, and building insulation.; 本文 / Graduate School of Bioresources Mie University, Japan; 104p
• Persistent ID (NDL): info:ndljp/pid/10371958; https://dl.ndl.go.jp/pid/10371958
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• Collection (Materials For Handicapped People:1): テキストデータ
• Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文; https://dl.ndl.go.jp/collections/A00014
• Acquisition Basis: 博士論文（自動収集）
• Date Accepted (W3CDTF): 2017-07-03T04:10:06+09:00
• Date Created (W3CDTF): 2017-06-23
• Format (IMT): application/pdf
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• Periodical Title (URI): http://hdl.handle.net/10076/00016937; https://mie-u.repo.nii.ac.jp/records/11281
• Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

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2023-12-16 再収集