scholarly journals Bio-Compatible Ca-BDC/Polymer Monolithic Composites Templated from Bio-Active Ca-BDC Co-Stabilized CO2-in-Water High Internal Phase Emulsions

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 931
Author(s):  
Xule Yang ◽  
Youwei Hao ◽  
Liqin Cao
Keyword(s):  
Polymer Composites ◽  
Continuous Phase ◽  
Porous Polymer ◽  
Porous Composite ◽  
Open Cell ◽  
E Coli ◽  
Internal Phase ◽  
Carbon Dioxide Pressure ◽  
Bio Compatibility ◽  
Porous Composites

Because of the nontoxic solvents contained in CO2-in-water emulsions, porous polymer composites templated from these emulsions are conducive for bio-applications. Herein, bio-active rod-like calcium-organic framworks (Ca-BDC MOFs, BDC= 1,4-benzenedicarboxylate anion) particles co-stabilized CO2-in-water high internal phase emulsion (C/W HIPE) in the presence of polyvinyl alcohol (PVA) is first presented. After curing of the continuous phase, followed by releasing CO2, integral 3D macro-porous Ca-BDC monolith and Ca-BDC/Poly(2-hydroxyethyl methacrylate-co-acrylamide) HIPEs monolithic composites [Ca-BDC/P(AM-co-HEMA)HIPEs] with open-cell macro-porous structures were successfully prepared. The pore structure of these porous composite can be tuned by means of tailoring the Ca-BDC dosage, carbon dioxide pressure, and continuous phase volume fractions in corresponding C/W HIPEs. Results of bio-compatibility tests show that these Ca-BDC/P(AM-co-HEMA)HIPEs monoliths have non-cytotoxicity on HepG2 cells; also, the E. coli can grow either on the surfaces or inside these monoliths. Furthermore, immobilization of β-amylase on these porous composite presents that β-amylase can be well-anchored into the porous polymer composites, its catalytic activity can be maintained even after 10 cycles. This work combined bio-active MOFs Ca-BDC, bio-compatible open-cell macroporous polymer PAM-co-HEMA and green C/W HIPEs to present a novel and facile way to prepare interconnected macro-porous MOFs/polymer composites. Compared with the existing other well-known materials such as hydrogels, these porous composites possess well-defined tunable pore structures and superior bio-activity, thereby have promising applications in bio-tissue engineering, food, and pharmaceutical.

scholarly journals Porous Polymers from High Internal Phase Emulsions as Scaffolds for Biological Applications

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1786
Author(s):  
Stanko Kramer ◽  
Neil R. Cameron ◽  
Peter Krajnc
Keyword(s):  
Cell Growth ◽  
Biomedical Applications ◽  
Wide Spectrum ◽  
Continuous Phase ◽  
Porous Polymer ◽  
Porous Polymers ◽  
Biological Cell ◽  
Biological Applications ◽  
Internal Phase ◽  
Advanced Applications

High internal phase emulsions (HIPEs), with densely packed droplets of internal phase and monomers dispersed in the continuous phase, are now an established medium for porous polymer preparation (polyHIPEs). The ability to influence the pore size and interconnectivity, together with the process scalability and a wide spectrum of possible chemistries are important advantages of polyHIPEs. In this review, the focus on the biomedical applications of polyHIPEs is emphasised, in particular the applications of polyHIPEs as scaffolds/supports for biological cell growth, proliferation and tissue (re)generation. An overview of the polyHIPE preparation methodology is given and possibilities of morphology tuning are outlined. In the continuation, polyHIPEs with different chemistries and their interaction with biological systems are described. A further focus is given to combined techniques and advanced applications.

Preparation of Core-Shell Particles Consisted of Polysiloxane and Styrene-Butyl Methacrylate by High Internal Phase Emulsion

2014 ◽  
Vol 1033-1034 ◽  
pp. 996-1001
Author(s):  
Shao Jin Jia ◽  
Zhen Qi Zhang ◽  
Zhen Gang Ding ◽  
Xiao Tian Hou ◽  
Ping Kai Jiang
Keyword(s):  
Weight Ratio ◽  
Continuous Phase ◽  
Butyl Methacrylate ◽  
Core Shell ◽  
Water Contact ◽  
High Internal Phase Emulsion ◽  
Transmission Electron ◽  
Internal Phase ◽  
Shell Particles ◽  
Shell Composite

A core-shell composite polymer was produced by the method of high internal phase emulsion polymerization. The continuous phase of emulsion contained styrene(St), butyl methacrylate(BMA), octamethylcylotetrasiloxane(D4), and azobisisobutyronitrile (AIBN) which worked as an initiator. The block copolymers with St, BMA, D4 units are particularly promising for surface modification and hydrophobicity. The core-shell structure is proved by the use of Transmission electron microscopy (TEM). In addition, the water contact angle increased with the increasing weight ratio of D4. The results show that the concentrated emulsion system has good stability and the water resistance of the polymer has been improved greatly.

Thermal Behavior of the Porous Polymer Composites Based on LDPE and Natural Fillers Studied by Real Time Thermal Microscopy

2021 ◽  
Vol 899 ◽  
pp. 644-659
Author(s):  
Elena A. Grigorieva ◽  
Anatoly A. Olkhov ◽  
Oleg V. Gradov ◽  
Margaret A. Gradova
Keyword(s):  
Composite Material ◽  
Thermal Behavior ◽  
Polymer Composites ◽  
Polymer Composite ◽  
Corn Starch ◽  
Wood Flour ◽  
Porous Polymer ◽  
Thermal Microscopy ◽  
Particle Size Fractions ◽  
Composite Samples

Foaming of the biodegradable polymer composites and melting of the gas-filled materials were studied using thermal microscopy. Composite materials under investigation were based on the low density polyethylene and natural products used as the polymer composite fillers: wood flour and corn starch. Porous structure of the composite material was obtained using a chemical porogen “Hydrocerol BIF”. It has been shown that the foaming and melting processes occur differently in the polymer composite samples containing either different amount of the fillers or the same content of the filler with different particle size fractions. Thermal behavior of the composite samples was shown to be different from the behavior of pure polyethylene, which indicates non-additivity (superadditivity) of the contribution of the above components to the thermal behavior of the final composite material. All the results obtained using heating stage (hot stage) microscopy were in good agreement with the SEM and DSC data.

Engineering crack tortuosity in printed polymer–polymer composites through ordered pores

2020 ◽  
Vol 7 (7) ◽  
pp. 1854-1860
Author(s):  
Luke F. Gockowski ◽  
Neil D. Dolinski ◽  
Roberto Chavez ◽  
Noy Cohen ◽  
Fabian Eisenreich ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Crack Deflection ◽  
Porous Polymer

A recently developed multimaterial printing approach, solution mask liquid lithography, is used to produce porous polymer–polymer composites inspired by hierarchical natural structures that exhibit significant crack deflection.

Critical Effects of Ligand Integration in Creating Palladium-Incorporated Porous Polymer Composites

2014 ◽  
Vol 118 (11) ◽  
pp. 5872-5880 ◽  
Author(s):  
Yaoyao Yang ◽  
Shin Ogasawara ◽  
Guang Li ◽  
Shinji Kato
Keyword(s):  
Polymer Composites ◽  
Porous Polymer

scholarly journals Highly concentrated emulsion with a cubic liquid crystal as the external phase: characterization and obtaining of meso/macroporous material

2013 ◽  
Vol 30 ◽  
pp. 87-96 ◽  
Author(s):  
E. Santamaría ◽  
M. Cortés ◽  
A. Maestro ◽  
M. Porras ◽  
J. M. Gutiérrez ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Droplet Size ◽  
Raw Materials ◽  
Water System ◽  
Chemical Society ◽  
Continuous Phase ◽  
Rheological Parameters ◽  
Macroporous Material ◽  
Internal Phase ◽  
External Phase

High internal phase ratio emulsions (HIPRE) or highly concentrated emulsions are characterized by their large internal phase volume.The nature and concentration of surfactant affects several features of the final emulsion, such as stability, droplet size and structure of the external phase. Therefore, an ordered external mesophase (structure of liquid crystal) can be obtained. The present work studies the influence of composition and preparation variables on the final properties of HIPRE with an external phase formed by a bicontinuous cubic liquid crystal. The studied outputs variables were droplet size, stability and rheological parameters as yield stress, viscosity at a fixed shear rate and the plateau value of the storage modulus. O/W HIPREs were prepared with a decane/brij 35/water system. Once the emulsions were characterized the meso/macroporous material was obtained. In order to prepare the materials, the emulsions were formed by incorporating the catalyst of the reaction (HCl) in the continuous phase. When the emulsions were formed, tetraethylorthosilicate (TEOS) was added as a silica source In order to optimize the production process a study of reutilization and recovery of some of the raw materials (i.e: the surfactant and the EtOH used) was done.DOI: http://dx.doi.org/10.3126/jncs.v30i0.9374Journal of Nepal Chemical Society Vol. 30, 2012 Page:  87-96 Uploaded date: 12/19/2013   

Preparation of inverse polymerized high internal phase emulsions using an amphiphilic macro-RAFT agent as sole stabilizer

2016 ◽  
Vol 7 (9) ◽  
pp. 1803-1812 ◽  
Author(s):  
Aminreza Khodabandeh ◽  
R. Dario Arrua ◽  
Christopher T. Desire ◽  
Thomas Rodemann ◽  
Stefan A. F. Bon ◽  
...  
Keyword(s):  
Continuous Phase ◽  
Dispersed Phase ◽  
Internal Phase ◽  
Oil In Water ◽  
Monomer Solution ◽  
Raft Agent

Oil-in-water (‘inverse’) High Internal Phase Emulsions (HIPEs) have been prepared using an amphiphilic macro-RAFT agent with toluene as the internal dispersed phase (∼80 vol%) and an aqueous monomer solution as the continuous phase.

Influence of Porosity on the Mechanical Properties of Cu/LDPE Porous Composites for Intrauterine Contraceptive Devices

2013 ◽  
Vol 302 ◽  
pp. 304-309
Author(s):  
Man Ge ◽  
Xian Ping Xia ◽  
Cheng Xiao ◽  
Lian Xiao ◽  
Shui Zhou Cai
Keyword(s):  
Mechanical Properties ◽  
Porous Structure ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Porous Composite ◽  
Crystallinity Degree ◽  
Contraceptive Devices ◽  
Intrauterine Contraceptive ◽  
Porous Composites ◽  
Intrauterine Contraceptive Devices

As a novel Cu-IUD material, it is necessary for copper/low-density polyethylene (Cu/LDPE) porous composite to have some suitable mechanical properties if it is used to prepare a clinical Cu-IUD with frame. However, it is not clear how the porosity of the porous structure affects the mechanical properties of Cu/LDPE porous composites. Therefore, the influence of the porosity of porous structure on the mechanical properties of Cu/LDPE porous composites is investigated in the present paper. The results show that the porosity has significant effects on the mechanical properties of Cu/LDPE porous composites. The mechanical properties of the Cu/LDPE porous composites decrease with the increasing of porosity, for the effective load area decreases, the chance for occurrence of cracks increases and the crystallinity degree of LDPE matrix increases with the increasing of porosity. These results are very important and they can be applied to guide the design of Cu/LDPE porous composite IUD for use in the future clinical application.

Heating Time Dependent Pore Size of Porous Composite from Waste Glass

2015 ◽  
Vol 1123 ◽  
pp. 397-401 ◽  
Author(s):  
Sulhadi ◽  
Susanto ◽  
Pradita Ajeng Wiguna ◽  
Meiriani Ismu Savitri ◽  
Muh. Afis Nur Said ◽  
...  
Keyword(s):  
Pore Size ◽  
Melting Process ◽  
Heating Time ◽  
Waste Glass ◽  
Time Dependent ◽  
Heating Process ◽  
Porous Composite ◽  
Water Filter ◽  
Bet Method ◽  
Porous Composites

Porous composites from waste glass were synthesized by simple heating process. The ability in the control of pore size was controlled by adjusting the time of melting point. In this study, the time of melting process was used a pore-forming agent in composite from waste glass. The composites from waste glass had been synthesized at 750οC with controllable of time 1, 2, and 3 hours. The characterization was showed by BET method. The composites from waste glass have decreased value of surface area. The composites with controllable of time 1, 2, and 3 hours, each other have 0.820 m2/g, 0.734 m2/g, and 0.445 m2/g. Porous composites from waste glass could be used in various applications, such as water filter.

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