scholarly journals A Combined Thermochemical and Microbial Process for Recycling Polylactic Acid Polymer to Optically Pure l-Lactic Acid for Reuse

2020 ◽  
Vol 28 (5) ◽  
pp. 1503-1512
Author(s):  
Diane Chauliac ◽  
Pratap C. Pullammanappallil ◽  
Lonnie O. Ingram ◽  
K. T. Shanmugam
Keyword(s):  
Lactic Acid ◽  
Polylactic Acid ◽  
Microbial Process ◽  
Optically Pure

scholarly journals Homo-d-Lactic Acid Fermentation from Arabinose by Redirection of the Phosphoketolase Pathway to the Pentose Phosphate Pathway in l-Lactate Dehydrogenase Gene-Deficient Lactobacillus plantarum

2009 ◽  
Vol 75 (15) ◽  
pp. 5175-5178 ◽  
Author(s):  
Kenji Okano ◽  
Shogo Yoshida ◽  
Tsutomu Tanaka ◽  
Chiaki Ogino ◽  
Hideki Fukuda ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactate Dehydrogenase ◽  
Lactobacillus Plantarum ◽  
Pentose Phosphate Pathway ◽  
Pentose Phosphate ◽  
Lactic Acid Fermentation ◽  
Acid Fermentation ◽  
Dehydrogenase Gene ◽  
Phosphoketolase Pathway ◽  
Optically Pure

ABSTRACT Optically pure d-lactic acid fermentation from arabinose was achieved by using the Lactobacillus plantarum NCIMB 8826 strain whose l-lactate dehydrogenase gene was deficient and whose phosphoketolase gene was substituted with a heterologous transketolase gene. After 27 h of fermentation, 38.6 g/liter of d-lactic acid was produced from 50 g/liter of arabinose.

scholarly journals Effects of synthesised polyaniline (PAni) contents on the anti-static properties of PAni-based polylactic acid (PLA) films

RSC Advances ◽  
2020 ◽  
Vol 10 (65) ◽  
pp. 39693-39699
Author(s):  
Pei-Yi Wong ◽  
Sook-Wai Phang ◽  
Azizah Baharum
Keyword(s):  
Lactic Acid ◽  
Polymer Film ◽  
Polylactic Acid ◽  
Poly Lactic Acid ◽  
Static Properties ◽  
Biodegradable Poly

An anti-static polymer film was prepared using biodegradable poly(lactic acid) as a matrix and polyaniline (PAni) as an anti-static agent to eliminate accumulated static charges.

scholarly journals Uncatalysed Polycondensation of Lactic Acid to Polylactic Acid Under Microwave Irradiation: Effect of Microwave Power

2020 ◽  
Vol 1551 ◽  
pp. 012001
Author(s):  
S. M. Shahrul Nizan Shikh Zahari ◽  
Muhammad Humaidi Mansor ◽  
Hazeeq Hazwan Azman ◽  
Dzulfadli Rosli
Keyword(s):  
Lactic Acid ◽  
Microwave Irradiation ◽  
Polylactic Acid ◽  
Microwave Power ◽  
Irradiation Effect

Repeated open fermentative production of optically pure l-lactic acid using a thermophilic Bacillus sp. strain

2010 ◽  
Vol 101 (16) ◽  
pp. 6494-6498 ◽  
Author(s):  
Bo Zhao ◽  
Limin Wang ◽  
Cuiqing Ma ◽  
Chunyu Yang ◽  
Ping Xu ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Bacillus Sp ◽  
Thermophilic Bacillus ◽  
Fermentative Production ◽  
Optically Pure

Synthesis of Poly(D,L-Lactic Acid-Co-Glucose) via Direct Polycondensation and its Characterization

2011 ◽  
Vol 80-81 ◽  
pp. 370-374 ◽  
Author(s):  
Shi He Luo ◽  
Zhao Yang Wang ◽  
Dong Na Huang ◽  
Chao Xu Mao ◽  
Jin Feng Xiong
Keyword(s):  
Drug Delivery ◽  
Lactic Acid ◽  
Polylactic Acid ◽  
1H Nmr ◽  
Biodegradable Material ◽  
Direct Polycondensation ◽  
Carrier Material ◽  
Melt Polymerization ◽  
Drug Delivery Carrier ◽  
Melt Polycondensation

Directly using cheap D,L-lactic acid (D,L-LA) and glucose (Glu) as starting materials, biodegradable material poly(D,L-lactic acid-co-Glucose) [P(D,L-LA-co-Glu)] was synthesized via melt polycondensation. When n(Glu) : n(D,L-LA) = 1:200, the appropriate synthetic condition is that: after 120 °C prepolymerization for 5 h, 160 °C melt polymerization catalyzed by w(SnCl2) = 0.5% for 5 h. P(D,L-LA-co-Glu) with different molar feed ratios were synthesized and characterized with [η], FTIR, 1H NMR, GPC and XRD. The Tg of all copolymer P(D,L-LA-co-Glu) was lower than that of homopolymer polylactic acid directly synthesized via melt polycondensation. The copolymers with Mw from 2,100 Da to 5,100 Da could meet the demand of drug delivery carrier material.

Formation the Polypyrrole / Chitosan / Polylactic Acid Microencapsules

2014 ◽  
Vol 881-883 ◽  
pp. 83-86 ◽  
Author(s):  
Hong Ye ◽  
Ying Liu ◽  
Xiang Hong Peng ◽  
Kun Wan ◽  
Feng Chen
Keyword(s):  
Electrical Conductivity ◽  
Acetic Acid ◽  
Lactic Acid ◽  
Polylactic Acid ◽  
Smooth Surface ◽  
Poly Lactic Acid ◽  
Spray Dried

The emulsion of chitosan in acetic acid aqueous and poly lactic acid in chloroform was spray-dried to obtain the chitosan/poly lactic acid microencapsules (CS-PLA). The polypyrrole / chitosan/ polylactic acid microencapsules were prepared by polymerization pyrrole on CS-PLA. The structures and the morphologies of microencapsules were characterized by FTIR, SEM, TGA and four probes technique. The results showed that multilayer polypyrrole were formation on the surface of CS-PLA microencapsules, the microencapsules had 3.0-8.0 μm diameters with smooth surface, and the electrical conductivity value was 1.03×10-3 S/cm.

Design of a heterogeneous catalytic process for the continuous and direct synthesis of lactide from lactic acid

2016 ◽  
Vol 18 (22) ◽  
pp. 5978-5983 ◽  
Author(s):  
Pravin P. Upare ◽  
Ji Woong Yoon ◽  
Dong Won Hwang ◽  
U-Hwang Lee ◽  
Young Kyu Hwang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Reaction Pathway ◽  
Direct Synthesis ◽  
Catalytic Process ◽  
Heterogeneous Catalytic Process ◽  
Atmospheric Conditions ◽  
Heterogeneous Catalytic ◽  
Nanocomposite Catalyst ◽  
One Step ◽  
Optically Pure

We present a continuous one-step reaction pathway for optically pure lactide under atmospheric conditions based on a novel SnO2–SiO2 nanocomposite catalyst.

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