Factors for <em>Phyllostachys edulis</em> timber glass transition temperatures

HUANG Mengxue; ZHANG Wenbiao; ZHANG Xiaochun; YU Wenjun; LI Wenzhu; LIU Xianmiao; DAI Chunping; WANG Sunguo

doi:10.11833/j.issn.2095-0756.2015.06.011

Volume 32 Issue 6

Nov. 2015

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Article Navigation > Journal of Zhejiang A&F University > 2015 > 32(6): 897-902

HUANG Mengxue, ZHANG Wenbiao, ZHANG Xiaochun, YU Wenjun, LI Wenzhu, LIU Xianmiao, DAI Chunping, WANG Sunguo. Factors for Phyllostachys edulis timber glass transition temperatures[J]. Journal of Zhejiang A&F University, 2015, 32(6): 897-902. doi: 10.11833/j.issn.2095-0756.2015.06.011

Citation:

HUANG Mengxue, ZHANG Wenbiao, ZHANG Xiaochun, YU Wenjun, LI Wenzhu, LIU Xianmiao, DAI Chunping, WANG Sunguo. Factors for Phyllostachys edulis timber glass transition temperatures[J]. Journal of Zhejiang A&F University, 2015, 32(6): 897-902. doi: 10.11833/j.issn.2095-0756.2015.06.011

Factors for Phyllostachys edulis timber glass transition temperatures

doi: 10.11833/j.issn.2095-0756.2015.06.011

1.
School of Engineering, Zhejiang A & F University, Lin’an 311300, Zhejiang, China;
2.
International Center for Bamboo and Rattan, Beijing 100102, China;
3.
FPInnovations, Vancouver B C V6T1W5, Canada;
4.
Sungro Bioresource & Bioenergy Technologies Corp., Edmonton T6R3J6, Canada

Funds:

国际竹藤中心专项资助项目（1632013002）;浙江省重大科技专项资助项目（2014C02018，2014C02004）

Received Date: 2015-01-13
Rev Recd Date: 2015-03-24
Publish Date: 2015-12-20

Abstract

To provide a theoretical basis for bamboo softening and flattening, a dynamic mechanical analyzer （DMTA） was used at various initial moisture contents （MC）（0%, 15%, 30%, 60%, and water saturation）, radial positions （outer, median, and inner layers）, ages （3, 5, and 7 years old）, and heights （2.5 m, 4.0 m, 5.5 m） to study the glass transition temperature （Tg） of Phyllostachys edulis bamboo. The test were performed between 30.0－260.0 ℃ with heating rate 5 ℃min－1, and amplitude 5 m and a frequency of 3 Hz. Results showed: that （1） with an increase of MC at 50.0－250.0 ℃, Tg decreased from 217.3 ℃ to 113.0 ℃. Initial MC changes at lower levels （＜15% MC） had a greater effect on Tg than moisture content changes ＞15% MC. （2） The Tg for the outer, median, and inner layers of bamboo along the radial direction showed little differences under the same age, initial MC, and height; maximum difference in Tg was 12.0 ℃ and minimum was 0.5 ℃. （3） With identical radial positions and initial MC, different ages and the heights did not affect bamboo Tg which had differences of less than 5.0 ℃. This study showed that an increased initial MC was good for bamboo softening and will, thus, help make full use of materials in the production process. ［Ch, 4 fig. 2 tab. 22 ref.］
- wood science and technology,
- Phyllostachys edulis,
- bamboo timber,
- dynamic thermal mechanical analysis,
- glass transition temperature,
- storage modulus,
- loss modulus

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References
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Proportional views

Factors for Phyllostachys edulis timber glass transition temperatures

1. School of Engineering, Zhejiang A & F University, Lin’an 311300, Zhejiang, China;

2. International Center for Bamboo and Rattan, Beijing 100102, China;

3. FPInnovations, Vancouver B C V6T1W5, Canada;

4. Sungro Bioresource & Bioenergy Technologies Corp., Edmonton T6R3J6, Canada

Funds:

国际竹藤中心专项资助项目（1632013002）;浙江省重大科技专项资助项目（2014C02018，2014C02004）

Received Date: 2015-01-13

Rev Recd Date: 2015-03-24

Publish Date: 2015-12-20

Key words:

Abstract: To provide a theoretical basis for bamboo softening and flattening, a dynamic mechanical analyzer （DMTA） was used at various initial moisture contents （MC）（0%, 15%, 30%, 60%, and water saturation）, radial positions （outer, median, and inner layers）, ages （3, 5, and 7 years old）, and heights （2.5 m, 4.0 m, 5.5 m） to study the glass transition temperature （Tg） of Phyllostachys edulis bamboo. The test were performed between 30.0－260.0 ℃ with heating rate 5 ℃min－1, and amplitude 5 m and a frequency of 3 Hz. Results showed: that （1） with an increase of MC at 50.0－250.0 ℃, Tg decreased from 217.3 ℃ to 113.0 ℃. Initial MC changes at lower levels （＜15% MC） had a greater effect on Tg than moisture content changes ＞15% MC. （2） The Tg for the outer, median, and inner layers of bamboo along the radial direction showed little differences under the same age, initial MC, and height; maximum difference in Tg was 12.0 ℃ and minimum was 0.5 ℃. （3） With identical radial positions and initial MC, different ages and the heights did not affect bamboo Tg which had differences of less than 5.0 ℃. This study showed that an increased initial MC was good for bamboo softening and will, thus, help make full use of materials in the production process. ［Ch, 4 fig. 2 tab. 22 ref.］

Factors for Phyllostachys edulis timber glass transition temperatures

doi: 10.11833/j.issn.2095-0756.2015.06.011

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Related

Proportional views

Factors for Phyllostachys edulis timber glass transition temperatures

doi: 10.11833/j.issn.2095-0756.2015.06.011

1. School of Engineering, Zhejiang A & F University, Lin’an 311300, Zhejiang, China;

2. International Center for Bamboo and Rattan, Beijing 100102, China;

3. FPInnovations, Vancouver B C V6T1W5, Canada;

4. Sungro Bioresource & Bioenergy Technologies Corp., Edmonton T6R3J6, Canada

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Factors for Phyllostachys edulis timber glass transition temperatures

doi: 10.11833/j.issn.2095-0756.2015.06.011

Abstract

Relative Article

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Related

Proportional views

Factors for Phyllostachys edulis timber glass transition temperatures

doi: 10.11833/j.issn.2095-0756.2015.06.011

1. School of Engineering, Zhejiang A & F University, Lin’an 311300, Zhejiang, China; 2. International Center for Bamboo and Rattan, Beijing 100102, China; 3. FPInnovations, Vancouver B C V6T1W5, Canada; 4. Sungro Bioresource & Bioenergy Technologies Corp., Edmonton T6R3J6, Canada

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1. School of Engineering, Zhejiang A & F University, Lin’an 311300, Zhejiang, China;

2. International Center for Bamboo and Rattan, Beijing 100102, China;

3. FPInnovations, Vancouver B C V6T1W5, Canada;

4. Sungro Bioresource & Bioenergy Technologies Corp., Edmonton T6R3J6, Canada