Effect of Basalt Fiber by Alkali Etching on Bonding Properties of Geopolymer-Based Wood Adhesives

Abstract

Abstract: As a new environment-friendly inorganic cementitious material, the geopolymer has great application potential in wood-based panel industry. However, the high brittleness limits its bonding property with wood. In order to improve the brittleness of geopolymer matrix and enhance its bonding property, alkali etching modification on the basalt fiber (BF) was used in this study. The basalt fiber was first etched by NaOH solution with different concentrations under different temperatures, and then the basalt fiber etched by alkali (HAF) was mixed with alkali activator, after which the geopolymer modified by basalt fiber (HAFMG) was prepared by adding metakaolin. The effect of alkali etching method on the mechanical property of HAFMG as well as bonding strength between HAFMG and wood was explored. The results show that alkali etching dissolves the silicon and aluminum components on the surface of BF, improves the surface roughness of BF and its interface combination with geopolymer matrix, and finally improves the bonding strength between the geopolymer and wood. Compared with the pure geopolymer, the geopolymer with the addition of HAF (100 ℃, 0.5 mol/L NaOH) has greater toughness. Its flexural strength increases by 154%, and the compression-flexure ratio is reduced by 41%. In addition, the shear strength of the geopolymer modified by HAF (100 ℃, 0.5 mol/L NaOH) is 121% higher than that of the pure geopolymer.

Key words: alkali etching, basalt fiber, geopolymer, wood, bonding property, compression-flexure ratio, shear strength

CLC Number:

S781.65

DENG Muling, ZHANG Yang, PAN Dawei, YE Hanzhou, ZHANG Na. Effect of Basalt Fiber by Alkali Etching on Bonding Properties of Geopolymer-Based Wood Adhesives[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(6): 2062-2069.

References

[1] 万进一.纤维增强地聚合物混凝土材料性能研究[D].郑州:郑州大学,2019:11-13.
WAN J Y. Study on material properties of fiber reinforced geopolymer concrete[D]. Zhengzhou: Zhengzhou University, 2019: 11-13 (in Chinese).
[2] 张云升,孙伟,沙建芳,等.粉煤灰地聚合物混凝土的制备、特性及机理[J].建筑材料学报,2003,6(3):237-242.
ZHANG Y S, SUN W, SHA J F, et al. Preparation, properties and mechanism of fly ash based geopolymer concrete[J]. Journal of Building Materials, 2003, 6(3): 237-242 (in Chinese).
[3] 陈士堃.偏高岭土基地聚合物基础力学性能与影响因素研究[D].杭州:浙江大学,2015:17-19.
CHEN S K. Study of basic mechanical properties and influential factors of metakaolin-based geopolymer[D]. Hangzhou: Zhejiang University, 2015: 17-19 (in Chinese).
[4] TURNER L K, COLLINS F G. Carbon dioxide equivalent (CO₂-e) emissions: a comparison between geopolymer and OPC cement concrete[J]. Construction and Building Materials, 2013, 43: 125-130.
[5] WU Y G, LU B W, BAI T, et al. Geopolymer, green alkali activated cementitious material: synthesis, applications and challenges[J]. Construction and Building Materials, 2019, 224: 930-949.
[6] SÁ RIBEIRO R A, SÁ RIBEIRO M G, SANKAR K, et al. Geopolymer-bamboo composite: a novel sustainable construction material[J]. Construction and Building Materials, 2016, 123: 501-507.
[7] ALOMAYRI T, VICKERS L, SHAIKH F U A, et al. Mechanical properties of cotton fabric reinforced geopolymer composites at 200~1 000 ℃[J]. Journal of Advanced Ceramics, 2014, 3(3): 184-193.
[8] 王亚超,赵江平,童媛媛,等.不同纤维增韧矿渣/粉煤灰基地质聚合物[J].硅酸盐通报,2016,35(12):4173-4179.
WANG Y C, ZHAO J P, TONG Y Y, et al. Different fiber toughened slag/fly ash based geopolymer[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(12): 4173-4179 (in Chinese).
[9] NIU D T, SU L, LUO Y, et al. Experimental study on mechanical properties and durability of basalt fiber reinforced coral aggregate concrete[J]. Construction and Building Materials, 2020, 237: 117628.
[10] LI L G, ZENG K L, OUYANG Y, et al. Basalt fibre-reinforced mortar: rheology modelling based on water film thickness and fibre content[J]. Construction and Building Materials, 2019, 229: 116857.
[11] 宋学锋,王骏,王艳.纤维/混杂纤维-矿渣地质聚合物复合材料的弯曲强度与弯曲韧性[J].材料导报,2017,31(22):121-124+145.
SONG X F, WANG J, WANG Y. Flexural strength and flexural toughness of fiber/hybrid fibers and slag-geopolymers composites[J]. Materials Review, 2017, 31(22): 121-124+145 (in Chinese).
[12] 李建.短切玄武岩纤维对矿渣粉煤灰混凝土力学性能和微观结构的影响[J].硅酸盐通报,2017,36(2):727-732+737.
LI J. Effects of chopped basalt fiber on mechanical properties and microstructure of slag fly ash concrete[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(2): 727-732+737 (in Chinese).
[13] PUNURAI W, KROEHONG W, SAPTAMONGKOL A, et al. Mechanical properties, microstructure and drying shrinkage of hybrid fly ash-basalt fiber geopolymer paste[J]. Construction and Building Materials, 2018, 186: 62-70.
[14] 李伟娜.玄武岩纤维表面酸刻蚀处理对其复合材料性能的影响[D].北京:北京林业大学,2013:11-13.
LI W N. Effect of acid modification on basalt fiber surface used for composites[D]. Beijing: Beijing Forestry University, 2013: 11-13 (in Chinese).
[15] YE H Z, ZHANG Y, YU Z M, et al. Effects of cellulose, hemicellulose, and lignin on the morphology and mechanical properties of metakaolin-based geopolymer[J]. Construction and Building Materials, 2018, 173: 10-16.
[16] YE Q Q, HAN Y F, ZHANG S F, et al. Bioinspired and biomineralized magnesium oxychloride cement with enhanced compressive strength and water resistance[J]. Journal of Hazardous Materials, 2020, 383: 121099.
[17] TIMAKUL P, RATTANAPRASIT W, AUNGKAVATTANA P. Improving compressive strength of fly ash-based geopolymer composites by basalt fibers addition[J]. Ceramics International, 2016, 42(5): 6288-6295.
[18] 王宁.玄武岩纤维及其改性沥青的性能研究[D].武汉:中国地质大学,2013:39-42.
WANG N. Study on property of basalt fiber and basalt fiber modified asphalt[D]. Wuhan: China University of Geosciences, 2013: 39-42 (in Chinese).
[19] 张浩,高屹,黄长虹,等.纤维对聚合物砂浆力学强度和柔韧性影响[J].低温建筑技术,2020,42(1):8-10.
ZHANG H, GAO Y, HUANG C H, et al. Effect of polymer and fiber on mechanical properties and flexibility of mortar[J]. Low Temperature Architecture Technology, 2020, 42(1): 8-10 (in Chinese).
[20] WAN X, SHEN C, WANG P, et al. A study on fracture toughness of ultra-high toughness geopolymer composites based on Double-K Criterion[J]. Construction and Building Materials, 2020, 251: 118851.
[21] SHAIKH F U A, FAIRCHILD A, ZAMMAR R. Comparative strain and deflection hardening behaviour of polyethylene fibre reinforced ambient air and heat cured geopolymer composites[J]. Construction and Building Materials. 2018, 163: 890-900.