Use of secondary fibres from recycling processes of fibreboard manufacturing and post-consumer waste in medium density fibreboard

IF 2.5 3区 农林科学 Q1 FORESTRY
Changling Xu, Joran van Blokland, Inês F. Mota, Percy Alao, Geoffrey Daniel, Stergios Adamopoulos
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Abstract

Recycling medium-density fibreboard (MDF) enhances material efficiency and contributes to waste management. This study investigates the impact of secondary fibres, generated from recycling of both processing and post-consumer waste, on the properties of new MDF panels. The fibres were recycled using a modified thermo-mechanical pulping (mTMP) and steam treatment (ST) processes. Virgin pine and secondary fibres were studied for their size distributions and morphological features. MDF panels were fabricated by substituting virgin fibres with secondary fibres at 15% and 25% rates, with additional 100% recycled MDF produced using ST-obtained fibres. Secondary fibres from both waste sources were shorter and had more fines than virgin fibres. For recycled MDF incorporating ST fibres, a notable drop in internal bond strength was observed when using fibres from post-consumer fibreboard waste, while modulus of rupture, modulus of elasticity, thickness swelling, and water absorption remained consistent. Increasing substitution rates from 15 to 25% resulted in an insignificant change in the aforementioned physical and mechanical properties. However, MDF produced with 100% recycled fibres exhibited a dramatic decrease in physical and mechanical properties, despite a reduction in formaldehyde content. Compared to MDF with virgin fibres, the internal bond strength of recycled MDF statistically decreased at all substitution ratios. In contrast, other properties were comparable at 15% or 25% rates for fibres produced using the mTMP process. Finally, MDF containing mTMP fibres showed similar density profile values, slightly higher than MDF with ST fibres.

利用纤维板制造过程中回收的二次纤维和消费后的废料制成中密度纤维板
回收中密度纤维板(MDF)可提高材料效率,并有助于废物管理。本研究调查了二次纤维对新型中密度纤维板性能的影响,二次纤维是由加工和消费后废物的回收产生的。利用改进的热机械制浆(mTMP)和蒸汽处理(ST)工艺回收纤维。对初生松和次生纤维的大小分布和形态特征进行了研究。中密度纤维板是用二次纤维以15%和25%的比率代替原始纤维制成的,另外使用st获得的纤维生产100%的再生中密度纤维板。来自两种废物来源的二次纤维比原始纤维更短,细粒更多。对于含有ST纤维的再生中密度纤维板,当使用消费后纤维板废料中的纤维时,观察到内部粘合强度明显下降,而断裂模量、弹性模量、厚度膨胀和吸水率保持一致。将取代率从15%提高到25%,对上述物理和机械性能的影响微乎其微。然而,100%再生纤维生产的中密度纤维板显示出物理和机械性能的急剧下降,尽管甲醛含量降低。与含原纤维的中密度纤维板相比,再生中密度纤维板的内部结合强度在所有取代率下都有统计学上的下降。相比之下,使用mTMP工艺生产的纤维的其他性能仅为15%或25%。最后,含有mTMP纤维的MDF具有相似的密度分布值,略高于含有ST纤维的MDF。
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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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