Cellulose fiber based fungal and water resistant insulation materials

Holzforschung ◽  
2017 ◽  
Vol 71 (7-8) ◽  
pp. 633-639 ◽  
Author(s):  
Chao Zheng ◽  
Dongfang Li ◽  
Anna Ottenhall ◽  
Monica Ek
Keyword(s):  
Thermal Insulation ◽  
Water Resistance ◽  
Cellulose Fiber ◽  
Fungal Resistance ◽  
Fibrous Materials ◽  
Negative Effects ◽  
Outer Bark ◽  
Insulation Materials ◽  
Betula Verrucosa ◽  
Improve Water Resistance

Abstract The development of thermal insulation materials from sustainable, natural fibrous materials is desirable. In the present study, cellulose fiber based insulation foams made of bleached chemi thermo mechanical pulp (CTMP) have been investigated. To improve water resistance, the foams were impregnated with hydrophobic extractives from the outer bark of birch (Betula verrucosa) and dried. The surface morphology of the foams and the distribution of the deposited particles from the extractives were observed by scanning electron microscopy (SEM). The modified foams showed improved water resistance, as they did not disintegrate after immersion in water for 7 days, whereas the unmodified foam did. Compared to the unmodified foam, the modified foams absorbed 50% less moisture within 24 h. The modification had no negative effects on the thermal insulation properties, fungal resistance or compressive strength of the foams. The proposed approach is simple and can be easily integrated into plants working based on the biorefinery concept.

Influences of Emulsion on Water Resistance of Vitrified Micro Bubbles Thermal Insulation Material

2013 ◽  
Vol 662 ◽  
pp. 433-436
Author(s):  
Jiang Zhu ◽  
Guo Zhong Li
Keyword(s):  
Compressive Strength ◽  
Polyvinyl Alcohol ◽  
Stearic Acid ◽  
Thermal Insulation ◽  
Water Resistance ◽  
Insulation Material ◽  
Molding Process ◽  
Thermal Insulation Material ◽  
Improve Water Resistance ◽  
Softening Coefficient

Vitrified micro bubbles thermal insulation material was made of vitrified micro bubbles, cement, fly ash, gypsum and sodium silicate, by molding process. VAE emulsion and stearic acid-polyvinyl alcohol emulsion were added to improve water resistance of the material. Mixed with 10% VAE emulsion and 5% stearic acid-polyvinyl alcohol emulsion, properties of the material are followed as: flexural strength 0.64MPa, compressive strength 1.35MPa, softening coefficient 0.71 and 2h volumetric water absorption 6.9%.

Effect of latex powder and glass fibers on the performance of glazed hollow bead thermal insulation materials

2015 ◽  
Vol 22 (3) ◽  
pp. 279-286 ◽  
Author(s):  
Xiaolong Li ◽  
Guozhong Li
Keyword(s):  
Mechanical Properties ◽  
Thermal Insulation ◽  
Water Resistance ◽  
Glass Fibers ◽  
Fracture Morphology ◽  
Insulation Material ◽  
Acrylic Emulsion ◽  
Insulation Materials ◽  
Before And After ◽  
Resistance Performance

AbstractGlazed hollow bead, cement, fly ash, and latex powder were used to prepare a glazed hollow bead thermal insulation material by way of compression molding, and the effects of redispersible latex powder on the mechanical properties and water resistance performance of the material were studied. In addition, the action mechanism of latex powder was analyzed. The surface of alkali-resistant glass fibers was treated by styrene-acrylic emulsion, and the effects of glass fibers on the mechanical properties of glazed hollow bead thermal insulation materials before and after treatment were studied, respectively. Moreover, the fracture morphology of the samples was observed and analyzed to explore the reinforced mechanism of fiber. The results show that when the dosage of latex powder is 4%, compared with blank samples, the sample’s flexural and compressive strengths increase by 48% and 20.83%, respectively, and the 2-h and 24-h water absorption of the samples is reduced by 71.37% and 66.94%, respectively. When the dosage of surface-treated fibers is 1.0%, the flexural strength of the samples increases by 35.71% and the compressive strength of the samples increases by 8.34% compared with samples that were mixed with untreated fibers.

Fire Safety Assessment of Exterior Thermal Insulation Materials using a Cone Calorimeter

2012 ◽  
Vol 22 (1) ◽  
pp. 131-141
Author(s):  
Qi Yanjun ◽  
Wang Xuegui ◽  
Cui Yu ◽  
Zhang Heping
Keyword(s):  
Thermal Insulation ◽  
Fire Safety ◽  
Cone Calorimeter ◽  
Safety Assessment ◽  
Insulation Materials

scholarly journals Aerogel Based High Performance Thermal Insulation Materials

2019 ◽  
Vol 553 ◽  
pp. 012043
Author(s):  
Mohanapriya Venkataraman ◽  
Rajesh Mishra ◽  
Jiri Militky ◽  
Dana Kremenakova ◽  
Petru Michal
Keyword(s):  
Thermal Insulation ◽  
High Performance ◽  
Insulation Materials

scholarly journals Fique as a Sustainable Material and Thermal Insulation for Buildings: Study of Its Decomposition and Thermal Conductivity

2021 ◽  
Vol 13 (13) ◽  
pp. 7484
Author(s):  
Gabriel Fernando García Sánchez ◽  
Rolando Enrique Guzmán López ◽  
Roberto Alonso Gonzalez-Lezcano
Keyword(s):  
Thermal Conductivity ◽  
Thermal Decomposition ◽  
Thermal Insulation ◽  
Model Fitting ◽  
Good Alternative ◽  
Negative Effects ◽  
Thermal Insulator ◽  
Fitting Method ◽  
Thermogravimetric Data ◽  
Reduce Energy Consumption

Buildings consume a large amount of energy during all stages of their life cycle. One of the most efficient ways to reduce their consumption is to use thermal insulation materials; however, these generally have negative effects on the environment and human health. Bio-insulations are presented as a good alternative solution to this problem, thus motivating the study of the properties of natural or recycled materials that could reduce energy consumption in buildings. Fique is a very important crop in Colombia. In order to contribute to our knowledge of the properties of its fibers as a thermal insulator, the measurement of its thermal conductivity is reported herein, employing equipment designed according to the ASTM C 177 standard and a kinetic study of its thermal decomposition from thermogravimetric data through the Coats–Redfern model-fitting method.

Bio-composite Thermal Insulation Materials Based on Banana Leaves Fibers and Polystyrene: Physical and Thermal Performance

2021 ◽  
pp. 1-16
Author(s):  
Gehad R. Mohamed ◽  
Rehab K. Mahmoud ◽  
Irene S. Fahim ◽  
Mohamed Shaban ◽  
H. M. Abd El-Salam ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Thermal Performance ◽  
Insulation Materials ◽  
Banana Leaves

The Research Status, Superiorities and Prospect of Composite Insulation Materials in China

2013 ◽  
Vol 750-752 ◽  
pp. 51-54
Author(s):  
Rui Feng Chen ◽  
Hua Liang Gu ◽  
Yi Ming Jia
Keyword(s):  
Thermal Insulation ◽  
Research Status ◽  
Insulation Materials ◽  
Research Achievement

Chinese existing insulation materials mainly included inorganic thermal insulation materials and organic insulation materials, but short of composite insulation materials. This paper elaborated the research achievement and superiority of the composite insulation materials.

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