Effect of temperature on the thermal property and crystallization behavior of poly (lactic acid) porous membrane prepared via phase separation induced by water microdroplets

Wang, Han; Qiao, Weihua; Ma, Sitian; Wang, Linfeng; Liu, Changjun; Zhou, Yingshan; Gu, Shaojin; Xu, Weilin; Shi, Jing; Yang, Hongjun

doi:10.1016/j.ijbiomac.2019.10.088

Cited by 7 publications

(2 citation statements)

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“…It is detected that all membranes exhibit asymmetric structures with finger‐like macropores, which open on one face and extended to the interior in the depth of the membrane 29 . This finger‐like macropore formation is facilitated by the spontaneous interchange between the solvent and nonsolvent occurring in the water coagulation bath (CB) 2,33 . Moreover, the shortest evaporation time provided before the immersion of casted membrane also encourages the formation of macroporous structure.…”

Section: Resultsmentioning

confidence: 99%

“…29 This finger-like macropore formation is facilitated by the spontaneous interchange between the solvent and nonsolvent occurring in the water coagulation bath (CB). 2,33 Moreover, the shortest evaporation time provided before the immersion of casted membrane also encourages the formation of macroporous structure.…”

Section: Morphology Porosity and Mechanical Properties Of Asymmetric ...mentioning

confidence: 99%

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Effect of annealing on the morphology and properties of poly(lactic acid)/polyhedral oligomeric silsesquioxane asymmetric porous membranes prepared through non‐solvent induced phase separation and its application

Ramachandran,

Thomas,

Thomas

et al. 2024

Polymers for Advanced Techs

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Non‐solvent induced phase separation (NIPS) method was employed to fabricate biodegradable poly(lactic acid) (PLA) nanocomposite membranes. Morphological studies using scanning electron microscopy revealed that all the membranes prepared display asymmetric structures comprising finger‐like macropores. The incorporation of modified polyhedral oligomeric silsesquioxane (POSS) particles into the PLA matrix resulted in enhanced crystallinity, mechanical, and thermal properties. Annealing of the membranes was performed to explore the influence of temperature on the morphology and properties. After annealing, membranes become more thin and compact, and drastic enhancement in crystallinity is also observed. Consequently, Young's modulus experiences a significant improvement. The reduction in oil absorption capacity after annealing can be attributed to the higher level of crystallinity, reduced porosity, and smaller pore diameter observed in the annealed membranes. Additionally, the unannealed PLA nanocomposite membranes demonstrated exceptional oil absorption capacity, reaching approximately 88%. It is foreseeable that these PLA/POSS nanocomposite membranes possess the potential to be utilized as effective tools for oil–water separation, offering the advantage of mitigating secondary pollution.

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Section: Resultsmentioning

confidence: 99%