Research on the Physico-Mechanical Properties of Moso Bamboo with Thermal Treatment in Tung Oil and Its Influencing Factors

Tang, Tong B.; Chen, Xiufang; Zhang, Bo; Liu, Xianmiao; Fei, Benhua

doi:10.3390/ma12040599

Cited by 66 publications

(40 citation statements)

References 50 publications

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“…Furthermore, during the high-temperature saturated steam treatment, 'bridge' reaction occurred between the hydroxyl groups in the cellulose molecular chains of the cellulosic cell wall of bamboo, which releases water and produces ether bonds. The crystallization in quasicrystalline ("paracrystalline") regions of cellulose may also contribute to the low EMC [30][31][32].…”

Section: Ftir Analysismentioning

confidence: 99%

Effect of high-temperature saturated steam treatment on the physical, chemical, and mechanical properties of moso bamboo

et al. 2020

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Moso bamboo (Phyllostachys heterocycla (Carr.) Mitford cv. Pubescens) was subjected to heat treatment with saturated steam at 140, 160, and 180 °C for 10-30 min to evaluate the effects of the treatment on the properties of bamboo. The changes in the physical, mechanical, and chemical properties as well as microscopic structures of moso bamboo were analyzed in this study. Results indicated that its equilibrium moisture content (EMC) decreased gradually after being treated by high-temperature saturated steam mostly due to the hemicelluloses' degradation. Both the temperature and duration of treatment affect the mechanical properties of bamboo. The modulus of elasticity (MOE) of bamboo was prone to be affected by heat treatment with saturated steam as compared to the modulus of rupture (MOR). The MOR and MOE increased as compared to the control when the sample was treated at 140 °C. However, a severe treatment negatively affects the mechanical properties of bamboo. The MOR and MOE decreased by 47% and 20% as compared to the control when the sample was heated at 180 °C for 30 min.

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Section: Ftir Analysismentioning

confidence: 99%

Effect of high-temperature saturated steam treatment on the physical, chemical, and mechanical properties of moso bamboo

et al. 2020

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“…Recently, tremendous efforts have been devoted to processing bamboo into sustainable, eco‐friendly, cost‐effective, and high‐performance composite materials. Pre‐treatment with bleaching, saturated steam, hot oil, or by filling with resin followed by densification, has led to the enhanced mechanical performance of natural bamboo . However, the improvement of the mechanical strength is moderate, generally achieving a tensile strength of 200–300 MPa and flexural strength of 100–320 MPa (Tables S1 and S2, Supporting Information), which is mainly due to the natural brittleness of the lignin network and inefficient load transfer caused by weak interface interactions between the sclerenchyma and parenchyma cells and the existence of numerous defects.…”

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confidence: 99%

A Strong, Tough, and Scalable Structural Material from Fast‐Growing Bamboo

et al. 2020

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Lightweight structural materials with high strength are desirable for advanced applications in transportation, construction, automotive, and aerospace. Bamboo is one of the fastest growing plants with a peak growth rate up to 100 cm per day. Here, a simple and effective top‐down approach is designed for processing natural bamboo into a lightweight yet strong bulk structural material with a record high tensile strength of ≈1 GPa and toughness of 9.74 MJ m−3. More specifically, bamboo is densified by the partial removal of its lignin and hemicellulose, followed by hot‐pressing. Long, aligned cellulose nanofibrils with dramatically increased hydrogen bonds and largely reduced structural defects in the densified bamboo structure contribute to its high mechanical tensile strength, flexural strength, and toughness. The low density of lignocellulose in the densified bamboo leads to a specific strength of 777 MPa cm3 g−1, which is significantly greater than other reported bamboo materials and most structural materials (e.g., natural polymers, plastics, steels, and alloys). This work demonstrates a potential large‐scale production of lightweight, strong bulk structural materials from abundant, fast‐growing, and sustainable bamboo.

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“…The relatively easy thermal degradation of hemicellulose might be attributed to the existence of many acetyl groups in the hemicellulose, which leads to the formation of acetic acid, thereby causing acid-catalyzed degradation of the polysaccharides 35 . For the cellulose, heat treatment in tung oil at high temperature below 180 °C did not result in reduction of cellulose content, which could be explained that cellulose has a semi-crystalline structure and there are limited accessible glucosidic bonds in cellulose 36 . In addition, the lignin content was slightly enhanced with increasing the heating temperature.…”

Section: Resultsmentioning

confidence: 95%

Synergistic effects of tung oil and heat treatment on physicochemical properties of bamboo materials

Tang

Zhang

Liu³

et al. 2019

Sci Rep

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The search for green and sustainable modification method to produce durable bamboo materials remains a challenge in industry. Here, heat treatment in tung oil at 100–200 °C was employed to modify bamboo materials. Oil permeation and distribution in the structure of bamboo samples during heat treatment were explored. The synergistic effects of tung oil and heat treatment on the chemical, physical and mechanical properties of bamboo materials, and their mutual relationships were also investigated in detail. Results showed that the tung oil heat treated bamboo not only had an enhanced hydrophobic property and dimensional stability, improved fungi resistance, but also displayed good mechanical performance. Compared with the untreated sample, the water-saturated swelling reduced from 3.17% to 2.42% for the sample after oil heat treatment at 200 °C, and the contact angles of the sample after oil heat treatment at 200 °C can keep >100° after 300 s in radial direction. Such improvement can be attributed to changes of chemical components, increased crystallinity structure, and the formation of oily films inside or over the bamboo surface. Therefore, tung oil heat treatment can be a highly promising technology for bamboo modification in the industry.

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Research on the Physico-Mechanical Properties of Moso Bamboo with Thermal Treatment in Tung Oil and Its Influencing Factors

Cited by 66 publications

References 50 publications

Effect of high-temperature saturated steam treatment on the physical, chemical, and mechanical properties of moso bamboo

Effect of high-temperature saturated steam treatment on the physical, chemical, and mechanical properties of moso bamboo

A Strong, Tough, and Scalable Structural Material from Fast‐Growing Bamboo

Synergistic effects of tung oil and heat treatment on physicochemical properties of bamboo materials

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