Valorization of Agricultural By-Products in Poly(Lactic Acid) to Develop Biocomposites

2013 ◽  
pp. 25-58
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
By Products

Natural wastes as particle filler for poly(lactic acid)-based composites

2018 ◽  
Vol 53 (6) ◽  
pp. 783-797 ◽  
Author(s):  
Daniele Battegazzore ◽  
Amir Noori ◽  
Alberto Frache
Keyword(s):  
Lactic Acid ◽  
Mechanical Characteristics ◽  
Raw Materials ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Renewable Raw Materials ◽  
By Products ◽  
Natural Fillers ◽  
Selection Of ◽  
Hemp Hurd

The paper describes the production and the mechanical characteristics of composites made completely of renewable raw materials. Several wastes or by-products from agro-industrial production namely hemp hurd, alfalfa, and grape stem were analyzed with respect to their thermal stability, morphological, and chemical composition in an attempt to validate their use in composites. Such natural particle fillers were used in the range of 10–50 wt% in combination with poly(lactic acid) by melt blending to obtain fully bio-based composites. These fillers were responsible for a noteworthy increase in the storage modulus. Furthermore, two micromechanical models (Voigt and Halpin–Tsai) were used to mathematically fitted the experimental data, and then the unknown moduli were extrapolated and compared with other natural fillers. Finally, the flexural strength of the bio-composites and the adhesion evaluation by exploiting Pukanszky’s model were carried out. As a result, the hemp hurd in the form of chips was the best investigated filler, which showed the highest calculated modulus of 10.5 GPa (Voigt) and the best filler–matrix interaction with “B” (Pukanszky’s coefficient) of 2.10. This information can be useful when comparison and selection of a suitable filler among the natural fillers are required.

Evaluation of the removal of n ‐butanol vapor by the poly(lactic acid) ‐zeolite‐TiO 2 composite and formation of by‐products

2020 ◽  
Vol 138 (7) ◽  
pp. 49842
Author(s):  
Luciana Gampert Miranda ◽  
Carolina Pereira Peglow ◽  
Victória Cardoso Deorristt ◽  
Geórgia Campos Sales Neto ◽  
Ariela Milbrath Cardoso ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
By Products

Valorization of Agricultural By-Products in Poly(Lactic Acid) to Develop Biocomposites

2013 ◽  
pp. 11-44
Author(s):  
Anne Bergeret ◽  
Jean-Charles Benezet ◽  
Thi-Phuong-Thao Tran ◽  
George Papanicolaou ◽  
Anastasia Koutsomitopoulou
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
By Products

scholarly journals Opportunities, perspectives and limits in lactic acid production from waste and industrial by-products

2016 ◽  
Vol 70 (4) ◽  
pp. 435-449 ◽  
Author(s):  
Dragana Mladenovic ◽  
Aleksandra Djukic-Vukovic ◽  
Jelena Pejin ◽  
Suncica Kocic-Tanackov ◽  
Ljiljana Mojovic
Keyword(s):  
Lactic Acid ◽  
Acid Production ◽  
New Technologies ◽  
Lactic Acid Production ◽  
Physical Nature ◽  
Raw Material ◽  
Poly Lactic Acid ◽  
Immobilized Cell ◽  
Waste Products ◽  
By Products

In line with the goals of sustainable development and environmental protection today great attention is directed towards new technologies for waste and industrial by-products utilization. Waste products represent potentially good raw material for production other valuable products, such as bioethanol, biogas, biodiesel, organic acids, enzymes, microbial biomass, etc. Since the first industrial production to the present, lactic acid has found wide application in food, cosmetic, pharmaceutical and chemical industries. In recent years, the demand for lactic acid has been increasing considerably owing to its potential use as a monomer for the production of poly-lactic acid (PLA) polymers which are biodegradable and biocompatible with wide applications. Waste and industrial by-products such are whey, molasses, stillage, waste starch and lignocellulosic materials are a good source of fermentable sugars and many other substances of great importance for the growth of microorganisms, such as proteins, minerals and vitamins. Utilization of waste products for production of lactic acid could help to reduce the total cost of lactic acid production and except the economic viability of the process offers a solution of their disposal. Fermentation process depends on chemical and physical nature of feedstocks and the lactic acid producer. This review describes the characteristics, abilities and limits of microorganisms involved in lactic acid production, as well as the characteristics and types of waste products for lactic acid production. The fermentation methods that have been recently reported to improve lactic acid production are summarized and compared. In order to improve processes and productivity, fed-batch fermentation, fermentation with immobilized cell systems and mixed cultures and opportunities of open (non-sterilized) fermentation have been investigated.

Electrical Properties of Heat-Treated Poly-Lactic Acid

2011 ◽  
Vol 131 (5) ◽  
pp. 395-400 ◽  
Author(s):  
Toru Oi ◽  
Katsuyoshi Shinyama ◽  
Shigetaka Fujita
Keyword(s):  
Lactic Acid ◽  
Electrical Properties ◽  
Poly Lactic Acid ◽  
Heat Treated

Dielectric Breakdown Properties of Poly-Lactic Acid with Spherulites Growth

2014 ◽  
Vol 134 (4) ◽  
pp. 237-242
Author(s):  
Naru Matsugasaki ◽  
Katsuyoshi Shinyama ◽  
Shigetaka Fujita
Keyword(s):  
Lactic Acid ◽  
Dielectric Breakdown ◽  
Poly Lactic Acid

Characterizing Attapulgite-Reinforced Nanocomposites of Poly(lactic acid)

2020 ◽  
Vol 62 (6) ◽  
pp. 732-743
Author(s):  
Chi-Hui Tsou ◽  
Jipeng Guo ◽  
Ji-Ang Lei ◽  
Manuel Reyes De Guzman ◽  
Maw-Cherng Suen
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid
Sign in / Sign up

Export Citation Format

Share Document