Polylactic acid (PLA)
نویسنده
چکیده
This website provides an excellent overview of PLA as a polymer, its properties, and manufacture. This web article describes the production of lactic acid from biomass by microbial fermentation coupled to a poly-merization process to make PLA. The article is a bit dated and its industrial projections are now seen to be a bit over-optimistic. NatureWorks is the company that started large-scale production of PLA via microbial biomass conversion several years ago. They are currently seeking to expand the market for uses of PLA. This web blog contains an interesting commentary on the chemistry of PLA production and the business side; including the pitfalls of involvement by a young chemist. This webpage highlights commercial products made out of PLA. This webpage focuses on the polymerization of lactic acid and the resultant properties of the polymeric products. This web article describes a research study on compost-ing PLA. PLA has been touted for its much greater biode-gradability than comparable petroleum-based polymers such as polyethylene. This article describes a PLA-degrading bacterium. It focuses on an extracellular enzyme from the bacterium that hydrolytically cleaves linkages in PLA. This webpage provides the protein sequence of a putative PLA depolymerase that is encoded by DNA from a metagenome sample. Lactic acid is the precursor to PLA. It is widely used in foods and, increasingly, in polymer manufacture. It derives largely from industrial-scale microbial fermentations.
منابع مشابه
Study of PLA Printability with Flexography Ink: Comparison with Common Packaging Polymer
Today, the economic consumption of biodegradable polymers is of capital importance in many applications. One of the most commonly used biopolymers is polylactic acid (PLA). The printability of the biodegradable film has not been fully investigated. This work tested the printability of polylactic acid (PLA) films and compared the print qualities to common packaging films like low density pol...
متن کاملInvestigation of drug release from paclitaxel loaded polylactic acid nanofibers
Objective(s): In this study, drug loaded electrospun nanofibrous mats were prepared and drug release and mechanism from prepared nanofibers were investigated. Materials and Methods: Paclitaxel (PTX) loaded polylactic acid (PLA) nanofibers were prepared by electrospinning. The effects of process parameters, such as PTX concentration, tip to collector distance, voltage, temperature and flow rate...
متن کاملEvaluation of Ibuprofen Release from Gelatin /Hydroxyapatite /Polylactic Acid Nanocomposites
Gelatin-hydroxyapatite-polylactic acid (PLA) nanocomposites were synthesized using five different formulations. The nanocomposites were loaded with ibuprofen and the amount of drug in the carriers was determined. X-ray diffraction (XRD) analysis was conducted before and after drug loading to ensure the presence of ibuprofen on the nanocomposites. Drug delivery was evaluated in phosphate buffere...
متن کاملThe effect of polylactic acid support in stability and electrical field of heterocyclic coupled hexa peptide nano systems: A novel strateu to drug delivery
Biological materials. recently. are the building blocks of several self-assembling peptide and protein systems.The main challenge In molecular self-assembly is to design molecular building blocks that can undergospontaneous organization. These cyche peptides were produced by an alternating fl'ell number of D- and Laminoacids.which interact through non-covalent interactions co an array of selfas...
متن کاملIn Vitro Antibacterial Activity of Polylactic Acid Film Incorporated with Ethanolic Propolis Extract and Ziziphora clinopodioides Essential Oil
Background: Innovative bioactive films incorporated with antimicrobial agents have been recently developed for food preservation. The aim of this study was to evaluate antibacterial activity of Polylactic Acid (PLA) films incorporated with Ziziphora clinopodioides Essential Oil (ZEO) and Ethanolic Propolis Extract (EPE) against some common food-borne pathogens. Methods: The volatile chemical...
متن کامل