SBIR Phase I: Bamboo-based Composite Filaments for Structural Purposes

SBIR第一阶段项目更广泛的影响/商业潜力是促进环境可持续建设。 通过提供3D打印混凝土的可持续替代品，促进竹子在建筑行业的使用，该项目旨在减少行业对未来二氧化碳（CO2）排放的贡献。目前的趋势表明，由于效率高、劳动力少和材料需求减少，3D打印可以取代建筑业的很大一部分。该项目将以其可持续的混凝土替代品加速这一转变。由于竹子每年每公顷可以吸收多达12吨的二氧化碳，而成熟的森林则为6.4吨，因此在建筑业中更广泛地使用竹子有利于环境。 SBIR第一阶段项目的重点是创建一种结构竹丝，可以取代混凝土制成的3D打印机丝。该项目将使用竹子作为混凝土的竞争对手，用于结构应用。非结构性木纤维已经存在，并与聚乳酸（PLA）混合。该项目计划将其中一些技术融入设计中，将竹子破碎成矩形的灰尘状颗粒，与大豆基粘合剂和PLA结合。在这个项目中最具挑战性的问题是优化胶比，以最大限度地提高铺展性能和极限强度，并在沉积过程中定向各向异性竹颗粒。该项目的目标是在第一阶段结束时生产出在强度和耐久性方面与混凝土长丝保持相似特性的竹长丝。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

The broader impact/commercial potential of this SBIR Phase I project is to promote environmentally sustainable construction. By promoting the use of bamboo in construction industry via offering a sustainable alternative to 3D printed concrete, this project intends to reduce industry's contribution towards future carbon dioxide (CO2) emissions. Current trends show that 3D printing could replace a large share of construction industry due to high efficiency, low labor, and reduced material requirements. This project would speed that transition with its sustainable alternative to concrete. Since bamboo can absorb as much as 12 tons of carbon dioxide per hectare per year, compared to 6.4 tons for a mature forest, broader use of bamboo in the construction industry benefits the environment. This SBIR Phase I project is focused on creating a structural bamboo filament that could replace 3D printer filaments made of concrete. This project will use bamboo for a rival filament to concrete to be used in structural applications. Non-structural wood filaments already exist and are mixed with Polylactic-Acid (PLA). This project plans to incorporate some of those techniques in its design by breaking the bamboo into rectangular, dust-like particles for combination with a soy-based adhesive and PLA. The most challenging problems anticipated in this project are optimizing that glue ratio to maximize spread properties and ultimate strength, and orienting the anisotropic bamboo particles during the deposition. The project aims to produce a bamboo filament that maintains similar properties to concrete filaments in terms of strength and durability by the end of Phase I.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.