Zhuang Xiaowei, Li Weichen, Pan Xin, Qiao Hui, Liu Baoyong, Yang Weiming, Feng Yongshun
Zhejiang Academy of Forestry, Liuhe Road 399, Hangzhou 310023, China.
College of Environmental Science and Engineering, Liaoning Technical University, Zhonghua Road 47, Fuxin 125105, China.
Polymers (Basel). 2024 Nov 28;16(23):3337. doi: 10.3390/polym16233337.
Bamboo is a fast-growing lignocellulosic plant in nature. It is an abundant and renewable resource with wide applications. The processing of bamboo results in a large amount of residue. In this paper, we developed a method to utilize bamboo residue to prepare a novel lightweight porous molding material. A hydrated thermochemical grinding process was proposed to disintegrate bamboo fibers and activate bamboo's own binding components. The influence of the water removal by pressure from bamboo suspension and subsequent different drying methods on the product's properties was evaluated. The two-step drying ensured a low production cost and high product quality. The bamboo molding material was characterized based on thermal stability, morphology, functional groups, particle size distribution, crystallinity, and mechanical strength. A lightweight porous material was obtained with a density of 0.23-0.35 g/cm by freeze-drying. A high mechanical strength was obtained with a tensile strength of 0.62 MPa and a compressive strength of 10.31 MPa by oven drying. The auto-adhesive mechanisms, including fiber anchorage, polymerization, water plasticization, and heat plasticization, were discussed. The bamboo molding material is a reconstruction of bamboo cell wall components and is easy to recycle. It has potential applications in construction and buildings, packaging, and indoor furnishings.
竹子是自然界中一种生长迅速的木质纤维素植物。它是一种储量丰富且可再生的资源，具有广泛的应用。竹子加工会产生大量残渣。在本文中，我们开发了一种利用竹渣制备新型轻质多孔成型材料的方法。提出了一种水合热化学研磨工艺来分解竹纤维并激活竹子自身的粘结成分。评估了从竹悬浮液中通过压力脱水以及随后不同干燥方法对产品性能的影响。两步干燥确保了低成本和高产品质量。基于热稳定性、形态、官能团、粒度分布、结晶度和机械强度对竹成型材料进行了表征。通过冷冻干燥获得了密度为0.23 - 0.35 g/cm的轻质多孔材料。通过烘箱干燥获得了较高的机械强度，拉伸强度为0.62 MPa，抗压强度为10.31 MPa。讨论了包括纤维锚固、聚合、水增塑和热增塑在内的自粘机理。竹成型材料是竹细胞壁成分的重构，且易于回收利用。它在建筑、包装和室内家具方面具有潜在应用。
