Nghiên cứu sử dụng mùn cưa làm chất độn trong chế tạo vật liệu compozit từ nhựa Poly(lactic acid) có tiềm năng ứng dụng trong kỹ thuật in 3D

Bài viết Nghiên cứu sử dụng mùn cưa làm chất độn trong chế tạo vật liệu compozit từ nhựa Poly(lactic acid) có tiềm năng ứng dụng trong kỹ thuật in 3D trình bày phương pháp chế tạo vật liệu compozit sinh học từ nhựa Poly(lactic acid) (PLA) và mùn cưa gỗ. Vật liệu compozit được chế tạo bằng phương pháp đùn hai trục vít. | TNU Journal of Science and Technology 228 02 20 - 28 THE USE OF SAWDUST AS FILLER IN THE MODIFICATION OF POLY LACTIC ACID BASED COMPOSITE WITH THE POTENTIAL FOR THE 3D PRINTING APPLICATIONS Le Duy Hung1 Phung Anh Tuan2 Nguyen Pham Duy Linh2 Vu Minh Duc2 Nguyen Thanh Liem2 1 National Banknote Printing Plant 2Hanoi University of Science and Technology ARTICLE INFO ABSTRACT Received 05 10 2022 The paper presents the method for the production of the bio-composite material prepared from Poly lactic acid PLA and wood sawdust. The bio- Revised 19 12 2022 composites are produced by the twin-screw extrusion method. The Published 21 12 2022 influences of the wood sawdust content on the mechanical properties of the materials including the impact strength the tensile strength Young s KEYWORDS modulus the flexural flexural modulus and microscopic observation are studied. The mechanical tests showed that the percent ratio of the wood PLA sawdust effects significantly the mechanical properties of the wood plastic Sawdust composites. The impact strength of the composite is the highest when the wood sawdust was added at 15 wt . When the wood sawdust was added at Bio-composite 20 wt and above the modified PLA turned out to be more brittle with Twin-screw Extruder reductions of the tensile strength the tensile modulus and the tensile Mechanical Properties elongation at break. Furthermore the flexural strength of the composites containing 20 by weight of wood sawdust is 40 less than that of PLA. Microscopic observations show that composites containing less than 20 by weight of wood sawdust have an even distribution of wood sawdust particles in their structure. Finally some sawdust particles were observed to agglomerate in composites containing more than 20 by weight of sawdust. NGHIÊN CỨU SỬ DỤNG MÙN CƯA LÀM CHẤT ĐỘN TRONG CHẾ TẠO VẬT LIỆU COMPOZIT TỪ NHỰA POLY LACTIC ACID CÓ TIỀM NĂNG ỨNG DỤNG TRONG KỸ THUẬT IN 3D Lê Duy Hùng1 Phùng Anh Tuân2 Nguyễn Phạm Duy Linh2 Vũ Minh Đức2 .