摘要
人工林木材已成为我国木材利用的主体,但其晚材率、密度、力学强度均较低,亟须对其进行功能性改良,以实现其高值化利用。利用纳米SiO2等无机材料可对其进行功能性改良,但改性后木材的性能与经自然生物矿化、无机组分有序沉积于细胞壁而致材质优良的柚木等相比差距巨大。自然生物矿化是通过生物有机大分子控制无机物微结构结晶、不同凝聚态物质间界面相互作用,温和地形成具有多级有序结构、优良力学性能和重要生理功能的材料。它启发了有机-无机复合生物材料的设计,并推进了生物学、材料科学和化学等的交叉融合,也可借鉴至人工林木材的功能性改良。综述了模拟自然生物矿化的人工林木材功能性改良的研究进展,包括其仿生矿化微环境构建、非活性细胞条件下体外仿生物矿化杂化结构形成及其沉积过程调控,仿生矿化中木材有机基底类型及作用、有机-无机杂化界面组分及结构、所形成复合材结构表征、矿化过程关键影响因子等研究,以及未来木材仿生矿化界面优化、仿生矿化理论体系构建及其技术发展方向。
As a main portion of wood in the forestry industry in China, plantation wood is urgent to be improved functions to achieve the high-value utilization due to its inherent low late wood ratio, low density and poor mechanical strength. Nano-SiO2and some other inorganic materials can be used to functionally modify them, but the performances of the modified-wood are much worse than that of the teak(Tectona grandis) wood, etc. The inorganic components are orderly deposited on the cell wall and excellent texture and properties are acquired via the natural biological minera-lization, which is a process of the organic macro-molecules controlling the inorganic materials’ micro-structure crystallization and the interface interaction between different condensed matters. By which, the materials with multistage ordered structures, excellent mechanical properties and important physiological functions have been tenderly formed. This has inspired the design of organic-inorganic composite bio-materials, and promoted the intersection and fusion of biology, material science and chemistry. As an important reference, it can also be used as the functional improvement process of the plantation wood. This paper reviews the research progress in functional improvement of the plantation wood by simulating the natural biological mineralization, including the construction of biomimetic mineralization micro-environment, the formation of biomimetic mineralization hybrid structure in vitro and the regulation of the deposition process under the conditions lacking of bio-active cell, as well as the types and functions of wooden organic substrates, organic-inorganic hybrid interface’s compositions and structures, the structure characterization of the formed composite materials, the key influencing factors of the mineralization process, as well as the interface optimization during the wood biomimetic mineralization, the theoretical system’s construction and consummation of plantation wood biomimetic mineralization and try to indicate the technical development directions in future.
作者
袁光明
杨滔
张梦颖
李航
王驰
邓泽斌
王朝辉
YUAN Guangming;YANG Tao;ZHANG Mengying;LI Hang;WANG Chi;DENG Zebin;WANG Zhaohui(College of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China;Collaborative Innovation Center for Effective Utilizing of Wood and Bamboo Resource of China,Changsha 410004,China)
出处
《林业工程学报》
CSCD
北大核心
2023年第1期21-29,共9页
Journal of Forestry Engineering
基金
国家自然科学基金(32171708,31770606)
湖南省科技创新计划项目(2021RC4062)
国家重点研发计划(2019YFE0114600)。
关键词
人工林木材
功能性改良
仿生矿化
界面优化
协效机制
plantation woods
functional modification
biomimetic mineralization
interface optimization
synergy mechanism
