Exploring the application and development of biomass materials in the field of special engineering in line with the principles of green development. This work investigates the mechanical and thermal properties response of bamboo scrimber (BS) with different densities and resin contents at room temperature and ultra-low temperatures (-196 °C). The results showed that ultra-low temperatures significantly enhanced the modulus of rupture (increase of 143.9 %), modulus of elasticity (125.0 %), compressive strength (150 %), and shear strength (165 %) of BS due to the cell shrinkage at low temperature and physical phase transition of internal water. The failure modes of BS at ultra-low temperatures transitioned from ductile to brittle, compared with that at room temperature. Furthermore, BS with lower-density exhibited better thermal insulation (thermal conductivity < 0.55 W/mK) and dimensional stability (CTE < 6 1/k⁻⁶). These findings established a research base for broadening the application areas of BS for cryogenic engineering applications.

按照绿色发展原则，探索生物质材料在特种工程领域的应用开发。这项工作研究了不同密度和树脂含量的重组竹（BS）在室温和超低温（-196℃）下的机械和热性能响应。结果表明，超低温由于泡孔收缩，显着提高了BS的断裂模量（增加143.9%）、弹性模量（125.0%）、压缩强度（150%）和剪切强度（165%）低温和内部水的物理相变。与室温下相比，超低温下BS的失效模式从韧性转变为脆性。此外，密度较低的BS表现出更好的隔热性（导热率< 0.55 W/mK）和尺寸稳定性（CTE< 6 1/k ^-6 ）。这些发现为拓宽BS在低温工程应用中的应用领域奠定了研究基础。