Biobased and Recyclable Polyurethane for Room-Temperature Damping and Three-Dimensional Printing

Abstract

Petroleum-based polymer materials heavily rely on nonrenewable petrochemical resources, and damping materials are an important category of them. As far as green chemistry, recycling, and damping materials are concerned, there is an urgent need for renewable and recyclable biobased materials with high damping performance. Thus, this study designs and synthesizes a series of polylactic acid-based thermoplastic polyurethanes (PLA-based TPUs) composed of modified polylactic acid polyols, 4,4′-diphenylmethane diisocyanate, and 1,4-butanediol. PLA-based TPUs, as prepared, display excellent mechanical properties, damping performance, and biocompatibility. Otherwise, they can be used for three-dimensional printing (3D printing). Under multiple recycling, the overall performance of PLA-based TPUs is still maintained well. Overall, PLA-based TPUs, as designed in this article, show a potential application in damping materials under room temperature and personalized shoes via 3D printing and could realize resource recycling and material reuse.

Effect of the content and strength of hard segment on the viscoelasticity of the polyurethane elastomer: insights from molecular dynamics simulation

“…16 Meanwhile, tan d decreases from 0.65 to 0.34. For another kind of PLA-based PU elastomer, 48 the G 0 rises from 7 MPa to 70 MPa with increasing a H from 23% to 39%. The tan d decreases from 0.7 to 0.25.…”

Polyurethanes Based on Polylactic Acid for 3D Printing and Shape-Memory Applications

“…However, T g of these materials is unsuitable for use in the human body. 53,54 Therefore, the development of methods to design PLA-TPUs with good recyclability, biocompatibility, and biodegradability, recovery temperatures near 37 °C, and customizability for different needs using 3D printing is of great practical significance for medical materials.…”

“…Therefore, the T g of PU can be tailored by modulating its SS and HS. − Several PU-SMPs have been developed considering this property, and the market demand for these materials, especially for products suitable for the human body, has steadily increased. ,,− The in situ formation of cross-linked PU from polyols and multifunctional isocyanates has been widely investigated in efforts to enhance the toughness of PLA , and modified PLAs have been successfully employed to synthesize PLA-TPUs with excellent toughness. However, T g of these materials is unsuitable for use in the human body. , Therefore, the development of methods to design PLA-TPUs with good recyclability, biocompatibility, and biodegradability, recovery temperatures near 37 °C, and customizability for different needs using 3D printing is of great practical significance for medical materials.…”

Poly(L‐lactic acid) and poly(ε‐caprolactone) based ultra‐strong and tough thermoplastic polyurethane‐urea with multi‐urea segments and oriented microstructures

“…With the rapid consumption of petroleum and the growing environmental pollution, bio‐based PU/PUU materials are drawing more and more attentions. Among them, poly(L‐lactic acid)(PLA), produced from bio‐based lactic acid, is attracting increasing interest because of its good degradability, biocompatibility, and renewability 16,17 . However, PLA is mainly used as plastic, because it is a well‐known semi‐crystalline rigid polymer, whose application is greatly limited by its brittleness and poor ductility 17 …”

“…16,17 However, PLA is mainly used as plastic, because it is a wellknown semi-crystalline rigid polymer, whose application is greatly limited by its brittleness and poor ductility. 17 Extensive strategies have been explored to improve the flexibility/toughness of PLA based materials, including plasticizing, copolymerizing, melt blending and chain extension method, etc. 18 Addition of plasticizer can effectively enhance the flexibility of PLA, but often accompanies with obvious decrease in mechanical performance and the risk of plasticizer leakage.…”