Preparation of a strong, mildew resistant, flame-retardant, and smoke suppressing bamboo scrimber through a sustainable method

IF 2.4 3区 农林科学 Q1 FORESTRY
Peisheng Li, Jiayu Xu, Anbo Pan, Mingyue Jiang, Yantao Xu, Xiaochun Zhang
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Abstract

With the rapid development of the economy and society, problems such as high resource consumption and serious environmental pollution in traditional reinforced concrete buildings are becoming increasingly prominent. Bamboo scrimber is an effective substitute for green building materials, but there are some problems such as susceptibility to mildew and poor flame retardancy, which limit its application in the building industry. In this study, the alkaline pretreatment process was used to remove some nutrients from bamboo to improve mildew resistance, and phytic acid and magnesium hydroxide were loaded on the surface of the bamboo bundle to enhance the flame retardancy. The results showed that phytic acid and magnesium hydroxide could be effectively loaded on the surface of bamboo bundles, and the mechanical strength, mildew resistance, and flame retardancy of modified bamboo scrimber (M10-PB) have been effectively improved. Compared with unmodified bamboo scrimber, the flexural strength and flexural modulus of M10-PB increased by 33.72% and 36.61% to 155.26 MPa and 14.59 GPa, respectively; the mold infection rate has decreased from 100% at 5 d to below 20% at 28 d; the limiting oxygen index of M10-PB bamboo scrimber increased by 13.2%, and the total smoke emission decreased by 54.4%. This method can effectively improve the mildew resistance, flame retardancy and smoke suppression of bamboo scrimber while maintaining high mechanical strength, which helps to promote the application of bamboo in the construction field.

用可持续的方法制备一种坚固、防霉、阻燃、抑烟的竹浆料
随着经济社会的快速发展,传统钢筋混凝土建筑资源消耗高、环境污染严重等问题日益突出。竹材是一种有效的绿色建材替代品,但存在易发霉、阻燃性差等问题,限制了其在建筑行业的应用。本研究采用碱性预处理工艺去除竹材中的部分营养物质以提高竹材的抗霉性,并在竹材束表面加载植酸和氢氧化镁以增强竹材束的阻燃性。结果表明,植酸和氢氧化镁能有效地加载在竹束表面,改性竹纤维(M10-PB)的机械强度、抗霉性和阻燃性得到了有效提高。与未改性竹材相比,M10-PB的抗弯强度和抗弯模量分别达到155.26 MPa和14.59 GPa,提高了33.72%和36.61%;霉菌感染率由5 d时的100%下降到28 d时的20%以下;M10-PB竹材的极限氧指数提高了13.2%,总烟排放量下降了54.4%。该方法可在保持较高机械强度的同时,有效提高竹材的防霉性、阻燃性和抑烟性,有助于促进竹材在建筑领域的应用。
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来源期刊
European Journal of Wood and Wood Products
European Journal of Wood and Wood Products 工程技术-材料科学:纸与木材
CiteScore
5.40
自引率
3.80%
发文量
124
审稿时长
6.0 months
期刊介绍: European Journal of Wood and Wood Products reports on original research and new developments in the field of wood and wood products and their biological, chemical, physical as well as mechanical and technological properties, processes and uses. Subjects range from roundwood to wood based products, composite materials and structural applications, with related jointing techniques. Moreover, it deals with wood as a chemical raw material, source of energy as well as with inter-disciplinary aspects of environmental assessment and international markets. European Journal of Wood and Wood Products aims at promoting international scientific communication and transfer of new technologies from research into practice.
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