scholarly journals Enhancement of the Oil Absorption Capacity of Poly(Lactic Acid) Nano Porous Fibrous Membranes Derived via a Facile Electrospinning Method

2019 ◽  
Vol 9 (5) ◽  
pp. 1014 ◽  
Author(s):  
Jun-Wei Liang ◽  
Gajula Prasad ◽  
Shi-Cai Wang ◽  
Jia-Lin Wu ◽  
Sheng-Guo Lu
Keyword(s):  
Lactic Acid ◽  
Diesel Oil ◽  
Absorption Capacity ◽  
Poly Lactic Acid ◽  
Toxic Substances ◽  
Water Mixture ◽  
Oil Absorption ◽  
The World ◽  
Fibrous Membranes ◽  
Needle Diameter

Oil spilling has been a serious problem in the world for a long time, which can bring toxic substances to marine life. A large number of researchers around the world have introduced many measures to address this problem. One of the effective methods to remove oil from the oil/water mixture is to absorb oil from the mixture. Here, we prepared porous poly(lactic acid) (PLA) membranes using the electrospinning approach with different sized syringe needles, and used these membranes to absorb oil from the top of the water. It was found that the diameter of the needle has a big impact on the size and structure of the pores on the PLA fibers. The oil absorption capacity of membranes increases with a decreasing needle diameter due to the increased pore volume and specific surface area. The highest absorption capacity reached was 42.38 g/g for vacuum pump oil, 28.17 g/g for peanut oil, and 6.74 g/g for diesel oil.

Dye Adsorption Capacity of MoS2 Nanoflakes Immobilized on Poly(lactic acid) Fibrous Membranes

2021 ◽  
Author(s):  
Rodrigo Schneider ◽  
Murilo H. M. Facure ◽  
Augusto D. Alvarenga ◽  
Paulo A. M. Chagas ◽  
Danilo M. dos Santos ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Adsorption Capacity ◽  
Dye Adsorption ◽  
Poly Lactic Acid ◽  
Fibrous Membranes

Preparation of electrospun siloxane-poly(lactic acid)-vaterite hybrid fibrous membranes for guided bone regeneration

2010 ◽  
Vol 70 (13) ◽  
pp. 1889-1893 ◽  
Author(s):  
Takashi Wakita ◽  
Akiko Obata ◽  
Gowsihan Poologasundarampillai ◽  
Julian R. Jones ◽  
Toshihiro Kasuga
Keyword(s):  
Lactic Acid ◽  
Bone Regeneration ◽  
Guided Bone Regeneration ◽  
Poly Lactic Acid ◽  
Fibrous Membranes

Bio-nanocomposites based on compatibilized poly(lactic acid) blend-reinforced agave cellulose nanocrystals

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 5538-5555
Author(s):  
Noor Afizah Rosli ◽  
Wan Hafizi Wan Ishak ◽  
Siti Salwani Darwis ◽  
Ishak Ahmad ◽  
Mohammad Fauzul Azim Mohd Khairudin
Keyword(s):  
Lactic Acid ◽  
Water Absorption ◽  
Cellulose Nanocrystals ◽  
Tensile Modulus ◽  
Crystallization Rate ◽  
Tensile Tests ◽  
Absorption Capacity ◽  
Poly Lactic Acid ◽  
Mechanical And Thermal Properties ◽  
Green Materials

Enhancing the mechanical, thermal, and degradation properties of a poly(lactic acid) (PLA) blend without deteriorating its other useful features was the goal of this work. The isolation of cellulose nanocrystals (CNCs) from Agave angustifolia fibers was carried out, and the properties of the bio-nanocomposites comprising these CNCs were evaluated, which included PLA, natural rubber (NR), and liquid NR (LNR). Transmission electron microscopy and zeta potential analysis confirmed the successful isolation of CNCs from agave fibers after several chemical treatment steps. The effects of different CNC loadings on the properties of the bio-nanocomposites were investigated using tensile tests, thermal analysis, morphological analysis, and water absorption tests. Bio-nanocomposites containing 5 wt% and 7.5 wt% CNC had the optimal tensile modulus and strength, respectively. Different levels of CNC did not noticeably affect the thermal stability of the bio-nanocomposites, although the thermogram curves increased slightly as CNC content increased. The addition of CNC at different loadings affects the crystallization rate of PLA blend. The water absorption capacity increased as CNC level increased, and 5 wt% CNC gave rise to the highest water absorption. The four-component bio-nanocomposites created in this study provided an alternative for producing new green materials with tunable physical, mechanical, and thermal properties.

Nanocomposites based on biocompatible polymers and graphene oxide for antibacterial coatings

2021 ◽  
pp. 096739112110206
Author(s):  
Fika Fauzi ◽  
Muhammad Miqdam Musawwa ◽  
Habibi Hidayat ◽  
Ahmad Kusumaatmaja ◽  
Wipsar Sunu Brams Dwandaru
Keyword(s):  
Antibacterial Activity ◽  
Graphene Oxide ◽  
Lactic Acid ◽  
Essential Oils ◽  
Vinyl Alcohol ◽  
Poly Lactic Acid ◽  
Poly Vinyl Alcohol ◽  
Biocompatible Polymers ◽  
Antibacterial Coatings ◽  
The World

Recently, antibacterial coatings based on graphene oxide (GO) nanocomposites have attracted many studies around the world. The use of polymers as the matrices of GO nanofillers in the nanocomposites has been explored to produce efficient coatings against bacteria. One of the most prospective applications is the incorporation of GO into biocompatible polymers, which can produce antibacterial coatings. Here, recent progresses on the antibacterial coatings of nanocomposites based on biocompatible polymers and GO are reviewed. The effect of GO filler concentrations, biocide materials, and biocompatibility are discussed to find the most efficient antibacterial activity and biocompatibility of nanocomposites. Among biocompatible polymers, chitosan (Cs), poly vinyl alcohol (PVA), and poly lactic acid (PLA) are the most popular matrices used for the nanocomposites. This review also elaborates challenges in the use of other biocompatible polymers. Future works on biocompatible antibacterial coatings should be conducted by considering the concentration of GO nanofillers or adding other materials such as essential oils to suppress the toxicity toward functional cells.

Wood flour reinforced biodegradable PBS/PLA composites

2018 ◽  
Vol 52 (19) ◽  
pp. 2641-2650 ◽  
Author(s):  
U Saeed ◽  
MA Nawaz ◽  
HA Al-Turaif
Keyword(s):  
Lactic Acid ◽  
Biodegradable Polymers ◽  
Natural Fiber ◽  
Wood Flour ◽  
Natural Fibers ◽  
Synthetic Fiber ◽  
Poly Lactic Acid ◽  
Toxic Substances ◽  
Butylene Succinate ◽  
The Impact

The advanced development of biocomposites made of biodegradable polymers and natural fibers has initiated great interest because the resultant polymer will degrade absolutely and will not emit toxic substances. Among the biodegradable polymers, the poly(butylene succinate) and poly(lactic acid) have diverse commercial applications and the natural fiber such as wood flour is renewable and cheaper alternative to synthetic fiber. The properties of the composite made of poly(butylene succinate)/poly(lactic acid) blend and wood flour are not compatible due to the poor wettability and interfacial adhesion. Therefore, in the study presented, the Fusabond MB 100 D has been used to improve the interfacial bonding between poly(butylene succinate)/poly(lactic acid) blend and the dispersed wood flour. The results reveal that the addition of FB not only increases the tensile strength but also improves the impact strength of poly(butylene succinate)/poly(lactic acid)wood flour composite under high dynamic loading. Moreover, when Fusabond MB 100 D is added as a coupling agent to the poly(butylene succinate)/poly(lactic acid)wood flour composite results of X-ray photo spectroscopy, fracture surface morphology and dynamical mechanical property indicate the interaction between the poly(butylene succinate)/poly(lactic acid) blend with the wood flour.

scholarly journals Smart-Urea-Controlled-Release-Nitrogen-Fertilizer Menggunakan Plastik Biodegradable Poli Asam Laktat Sebagai Carrier

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Mujtahid Kaavessina ◽  
Chitra Husnabilqis ◽  
Meylani Tri Hardiyanti
Keyword(s):  
Molecular Weight ◽  
Lactic Acid ◽  
Controlled Release ◽  
Nitrogen Fertilizer ◽  
Average Molecular Weight ◽  
Urea Concentration ◽  
Poly Lactic Acid ◽  
Heating Process ◽  
Toxic Substances ◽  
The Matrix

<p>Poly lactic acid is a polymer that has been developed as an alternative to substitution of conventional polymers. The properties of this polymer are biodegradable in nature and non-toxic substances. These polymers potentially can be used as a matrix for urea carries. The aim of this research was to synthesize poly lactic acid in a low molecular weight. This product can be used as a matrix that urea release controller during the process of fertilization. The methodology consisted of two stages. The first stage was polycondensation of lactic acid and degradability test. Lactic acid was mixed with SnCl2 catalyst 0.1% and heated to 138oC for 24 hours. The second stage was producing in the form of Smart Urea Controlled Release Nitrogen Fertilizer (CRNF). Urea was dissolved in poly lactic acid through a heating process at 150°C to dissolve urea with variation in urea concentration weight of  0.5%; 0.1%; 0.15%; 0.2%; 0.25%; 0.3% and CRNF granulation processes. Finally, the mixture was granulated in ambient temperature. Chemical analysis was done the molecular weight of poly lactic acid. The relationship between intrinsic viscosity  and  molecular  weight  was  used.  The  IR  spectra  (FTIR)  was  used  to  fine molecular structure. The release testing of urea from the matrix of poly lactic acid uses UV-VIS Spectrophotometer. The results showed that the average molecular weight of poly lactic acid is 1149.49 g /gmol. FTIR spectra of CRNF with variation in urea concentration weight showed the presence of groups owned by poly lactic acid and urea. The peaks are</p><p>1627.03 to 1629.92 cm-1 for the -NH group and 3478.77 to 3498.06 cm-1 for group -OH. The existence of these groups proves the existence of urea in CRNF. The release of urea from poly lactic acid occurs by diffusion. It can be seen, when urea in CRNF form immersed in water, the concentration of urea in water increase as well as the increasing immersed time.</p>

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