Synergistic effects of polyethylene glycol and organic montmorillonite on the plasticization and enhancement of poly(lactic acid)

2019 ◽  
Vol 136 (21) ◽  
pp. 47576 ◽  
Author(s):  
Wenting Chen ◽  
Hao Chen ◽  
Ya Yuan ◽  
Shaoxian Peng ◽  
Xipo Zhao
Keyword(s):  
Lactic Acid ◽  
Polyethylene Glycol ◽  
Synergistic Effects ◽  
Poly Lactic Acid ◽  
Organic Montmorillonite

Improvement of the antifouling properties of poly (lactic acid) hollow fiber membranes with poly (lactic acid)–polyethylene glycol–poly (lactic acid) copolymers

Desalination ◽  
2013 ◽  
Vol 325 ◽  
pp. 37-39 ◽  
Author(s):  
Peng Shen ◽  
Akihito Moriya ◽  
Saeid Rajabzadeh ◽  
Tatsuo Maruyama ◽  
Hideto Matsuyama
Keyword(s):  
Lactic Acid ◽  
Polyethylene Glycol ◽  
Hollow Fiber ◽  
Poly Lactic Acid ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes

Effect of Polyethylene Glycol in Nanocellulose/PLA Composites

2019 ◽  
Vol 821 ◽  
pp. 89-95
Author(s):  
Wanasorn Somphol ◽  
Thipjak Na Lampang ◽  
Paweena Prapainainar ◽  
Pongdhorn Sae-Oui ◽  
Surapich Loykulnant ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Polyethylene Glycol ◽  
Aspect Ratio ◽  
Mechanical Performance ◽  
Tensile Modulus ◽  
Poly Lactic Acid ◽  
Solvent Casting ◽  
Casting Method ◽  
Mediated Oxidation

Poly (lactic acid) or PLA was reinforced by nanocellulose and polyethylene glycol (PEG), which were introduced into PLA matrix from 0 to 3 wt.% to enhance compatibility and strength of the PLA. The nanocellulose was prepared by TEMPO-mediated oxidation from microcrystalline cellulose (MCC) powder and characterized by TEM, AFM, and XRD to reveal rod-like shaped nanocellulose with nanosized dimensions, high aspect ratio and high crystallinity. Films of nanocellulose/PEG/PLA nanocomposites were prepared by solvent casting method to evaluate the mechanical performance. It was found that the addition of PEG in nanocellulose-containing PLA films resulted in an increase in tensile modulus with only 1 wt% of PEG, where higher PEG concentrations negatively impacted the tensile strength. Furthermore, the tensile strength and modulus of nanocellulose/PEG/PLA nanocomposites were higher than the PLA/PEG composites due to the existence of nanocellulose chains. Visual traces of crazing were detailed to describe the deformation mechanism.

scholarly journals Star Shaped Long Chain Branched Poly (lactic acid) Prepared by Melt Transesterification with Trimethylolpropane Triacrylate and Nano-ZnO

Polymers ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 796 ◽  
Author(s):  
Le Yang ◽  
Zaijun Yang ◽  
Feng Zhang ◽  
Lijin Xie ◽  
Zhu Luo ◽  
...  
Keyword(s):  
Lactic Acid ◽  
High Efficiency ◽  
Synergistic Effects ◽  
Transesterification Reaction ◽  
Poly Lactic Acid ◽  
Cell Diameter ◽  
Nano Zno ◽  
Melt Strength ◽  
Trimethylolpropane Triacrylate ◽  
Long Chain

Long chain branched poly (lactic acid) (LCBPLA) was prepared via transesterification between high molecular weight poly (lactic acid) (PLA) and low molar mass monomer trimethylolpropane triacrylate (TMPTA) during melt blending in the presence of zinc oxide nanoparticles (nano-ZnO) as a transesterification accelerant in a torque rheometer. Compared with the traditional processing methods, this novel way is high-efficiency, environmentally friendly, and gel-free. The results revealed that chain restructuring reactions occurred and TMPTA was grafted onto the PLA backbone. The topological structures of LCBPLA were verified and investigated in detail. It was found that the concentration of the accelerants and the sampling occasion had very important roles in the occurrence of branching structures. When the nano-ZnO dosage was 0.4 phr and PLA was sampled at the time corresponding to the reaction peak in the torque curve, PLA exhibited a star-shaped topological structure with a high branching degree which could obviously affect the melt strength, extrusion foaming performances, and crystallization behaviors. Compared with pristine PLA, LCBPLA showed a higher melt strength, smaller cell diameter, and slower crystallization speed owing to the synergistic effects of nano-ZnO and the long chain branches introduced by the transesterification reaction in the system. However, severe degradation of the LCBPLAs would take place under a mixing time that was too long and lots of short linear chains generated due to the excessive transesterification reaction, with a sharp decline in melt strength.

Hydrolytic and thermal degradation of polyethylene glycol compatibilized poly(lactic acid)-nanocrystalline cellulose bionanocomposites

2018 ◽  
Vol 136 (2) ◽  
pp. 46933 ◽  
Author(s):  
Ping Zhang ◽  
Yi-Yao He ◽  
De Gao ◽  
Yingfeng Cai ◽  
Bingren Liu
Keyword(s):  
Lactic Acid ◽  
Polyethylene Glycol ◽  
Thermal Degradation ◽  
Nanocrystalline Cellulose ◽  
Poly Lactic Acid

Fabrication and the barrier characterization of the cellulose nanofibers/organic montmorillonite/poly lactic acid nanocomposites

2021 ◽  
pp. 51827
Author(s):  
Yuan Li ◽  
Lu Zhang ◽  
Fayong Li ◽  
Ke Wang ◽  
Xiaoru Wu ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Cellulose Nanofibers ◽  
Poly Lactic Acid ◽  
Organic Montmorillonite

Enhanced properties of poly(lactic acid) by concurrent addition of organo-modified Mg-Al layered double hydroxide (LDH) and triethyl citrate

2019 ◽  
pp. 089270571986827 ◽  
Author(s):  
Mehrnoush Monshizadeh ◽  
Sajad Seifi ◽  
Iman Hejazi ◽  
Javad Seyfi ◽  
Hossein Ali Khonakdar
Keyword(s):  
Lactic Acid ◽  
Layered Double Hydroxide ◽  
Food Packaging ◽  
Synergistic Effects ◽  
Poly Lactic Acid ◽  
Solution Casting ◽  
Scanning Calorimetry ◽  
Concurrent Use ◽  
Triethyl Citrate ◽  
Double Hydroxide

Synergistic effects of organo-modified Mg-Al layered double hydroxide (LDH) and triethyl citrate (TEC) on the properties of poly(lactic acid) (PLA) were demonstrated. PLA/LDH nanocomposites in the absence and presence of TEC were fabricated via solution casting technique. Morphological analysis revealed that as the LDH concentration increases, the number of aggregations is also increased; however, introduction of TEC considerably enhanced the dispersion quality of LDHs. Differential scanning calorimetry results showed that the addition of LDH and TEC had no significant influence on the crystallinity of nanocomposites obtained from solution casting. In contrast, once the samples were cooled from melt, the concurrent use of LDH and TEC led to a dramatic enhancement in the crystallinity of PLA ( X c = 55.5%). Moreover, the LDH nanoparticles counterbalanced the adverse effects of plasticization by TEC leading to enhanced toughness of the final nanocomposites. LDH had also a positive influence on thermal stability of PLA, indicating the heat-insulating role of LDH particles. In conclusion, the concurrent use of LDH and TEC could extend the applicability of PLA especially in food packaging applications.

Multimodal tumor imaging by iron oxides and quantum dots formulated in poly (lactic acid)-d-alpha-tocopheryl polyethylene glycol 1000 succinate nanoparticles

Biomaterials ◽  
2011 ◽  
Vol 32 (11) ◽  
pp. 2969-2978 ◽  
Author(s):  
Yang Fei Tan ◽  
Prashant Chandrasekharan ◽  
Dipak Maity ◽  
Cai Xian Yong ◽  
Kai-Hsiang Chuang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lactic Acid ◽  
Polyethylene Glycol ◽  
Iron Oxides ◽  
Tumor Imaging ◽  
Poly Lactic Acid ◽  
Polyethylene Glycol 1000

Polyethylene glycol functionalized graphene oxide and its influences on properties of Poly(lactic acid) biohybrid materials

2019 ◽  
Vol 161 ◽  
pp. 651-658 ◽  
Author(s):  
Nguyen Dang Mao ◽  
Hun Jeong ◽  
Thi Kim Ngan Nguyen ◽  
Thi Mai Loan Nguyen ◽  
Thi Vi Vi Do ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lactic Acid ◽  
Polyethylene Glycol ◽  
Poly Lactic Acid ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide
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