Membrane Catalysis: N 2 O Decomposition over La 0.2 Sr 0.8 Ti 0.2 Fe 0.8 O 3–δ Membrane with Oxygen Permeability

Optimum Infinite is a new era of oxygen permeability material for contact lenses

The Eye ◽

10.33791/2222-4408-2020-1-44-46 ◽

2020 ◽

Vol 22 (129) ◽

pp. 44-46

Author(s):

Mark Eddleston

Keyword(s):

Contact Lens ◽

Oxygen Permeability ◽

Contact Lenses ◽

New Era ◽

Lens Material ◽

Insight Into

Optimum Infinite is a new GP contact lens material, with an oxygen permeability of 180 barrer and was launched by Contamac at the GSLS 2019. This article provides an insight into the development and characteristics of this breakthrough material.

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Simulation of Oxygen Permeability of Dual-phase Hollow Fiber Membrane

Journal of Inorganic Materials ◽

10.3724/sp.j.1077.2012.11635 ◽

2012 ◽

Vol 27 (9) ◽

pp. 951-955

Author(s):

Chun-Li YANG ◽

Qi-Ming XU ◽

Ming GONG ◽

Wei LIU

Keyword(s):

Hollow Fiber ◽

Oxygen Permeability ◽

Hollow Fiber Membrane ◽

Dual Phase ◽

Fiber Membrane

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Improving the Oxygen Permeability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ Membranes by Laser Ablation

Journal of Inorganic Materials ◽

10.3724/sp.j.1077.2010.00221 ◽

2010 ◽

Vol 25 (2) ◽

pp. 221-224 ◽

Cited By ~ 3

Author(s):

Zi-Gang SHEN ◽

Peng-Xian LU ◽

Xing HU

Keyword(s):

Laser Ablation ◽

Oxygen Permeability

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Hydrogels as Antibacterial Biomaterials

Current Pharmaceutical Design ◽

10.2174/1381612824666180213122953 ◽

2018 ◽

Vol 24 (8) ◽

pp. 843-854 ◽

Cited By ~ 6

Author(s):

Weiguo Xu ◽

Shujun Dong ◽

Yuping Han ◽

Shuqiang Li ◽

Yang Liu

Keyword(s):

Mechanical Properties ◽

Drug Delivery ◽

Tissue Engineering ◽

Water Content ◽

Oxygen Permeability ◽

Structural Diversity ◽

High Water ◽

Clinical Applications ◽

High Water Content ◽

Biomedical Field

Hydrogels, as a class of materials for tissue engineering and drug delivery, have high water content and solid-like mechanical properties. Currently, hydrogels with an antibacterial function are a research hotspot in biomedical field. Many advanced antibacterial hydrogels have been developed, each possessing unique qualities, namely high water swellability, high oxygen permeability, improved biocompatibility, ease of loading and releasing drugs and structural diversity. In this article, an overview is provided on the preparation and applications of various antibacterial hydrogels. Furthermore, the prospects in biomedical researches and clinical applications are predicted.

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Fabrication and characterization of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) modified with nano-montmorillonite biocomposite

e-Polymers ◽

10.1515/epoly-2021-0006 ◽

2020 ◽

Vol 21 (1) ◽

pp. 038-046

Author(s):

Xu Yan ◽

Wanru Zhou ◽

Xiaojun Ma ◽

Binqing Sun

Keyword(s):

Thermal Stability ◽

Oxygen Permeability ◽

Water Vapor Permeability ◽

Barrier Properties ◽

Nucleating Agent ◽

Vapor Permeability ◽

Casting Method ◽

Increasing Trend ◽

Solution Casting Method

Abstract In this study, a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) modified with nano-montmorillonite biocomposite (MMT/PHBH) was fabricated by solution-casting method. The results showed that the addition of MMT increased the crystallinity and the number of spherulites, which indicated that MMT was an effective nucleating agent for PHBH. The maximum decomposition peak of the biocomposites moved to a high temperature and residue presented an increasing trend. The biocomposites showed the best thermal stability at 1 wt% MMT. Compared with PHBH, 182.5% and 111.2% improvement in elastic modulus and tensile strength were obtained, respectively. Moreover, the oxygen permeability coefficient and the water vapor permeability of MMT/PHBH biocomposites decreased by 43.9% and 6.9%, respectively. It was also found that the simultaneous enhancements on the crystallizing, thermal stability, mechanical, and barrier properties of biocomposites were mainly caused by the formation of intercalated structure between PHBH and MMT.

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Oxygen Permeability of Silk Fibroin Hydrogels and Their Use as Materials for Contact Lenses: A Purposeful Analysis

Gels ◽

10.3390/gels7020058 ◽

2021 ◽

Vol 7 (2) ◽

pp. 58

Author(s):

Traian V. Chirila

Keyword(s):

Tissue Engineering ◽

Bombyx Mori ◽

Silk Fibroin ◽

Biomedical Applications ◽

Oxygen Permeability ◽

Contact Lenses ◽

The Past ◽

Fibrous Protein ◽

Silk Moth ◽

Bombyx Mori Silk

Fibroin is a fibrous protein that can be conveniently isolated from the silk cocoons produced by the larvae of Bombyx mori silk moth. In its form as a hydrogel, Bombyx mori silk fibroin (BMSF) has been employed in a variety of biomedical applications. When used as substrates for biomaterial-cells constructs in tissue engineering, the oxygen transport characteristics of the BMSF membranes have proved so far to be adequate. However, over the past three decades the BMSF hydrogels have been proposed episodically as materials for the manufacture of contact lenses, an application that depends on substantially elevated oxygen permeability. This review will show that the literature published on the oxygen permeability of BMSF is both limited and controversial. Additionally, there is no evidence that contact lenses made from BMSF have ever reached commercialization. The existing literature is discussed critically, leading to the conclusion that BMSF hydrogels are unsuitable as materials for contact lenses, while also attempting to explain the scarcity of data regarding the oxygen permeability of BMSF. To the author’s knowledge, this review covers all publications related to the topic.

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New Synthetic Methods of Novel Nanoporous Polycondensates and Excellent Oxygen Permselectivity of Their Composite Membranes

Nanomaterials ◽

10.3390/nano9060859 ◽

2019 ◽

Vol 9 (6) ◽

pp. 859

Author(s):

Yu Zang ◽

Toshiki Aoki ◽

Masahiro Teraguchi ◽

Takashi Kaneko ◽

Hongge Jia ◽

...

Keyword(s):

Contact Angle ◽

Upper Bound ◽

Oxygen Permeability ◽

Membrane Surface ◽

Composite Membranes ◽

Synthetic Methods ◽

Preparation Methods ◽

First Time

Two kinds of novel nanoporous polycondensates (sc(Rf)) have been synthesized by two new preparation methods consisting of polycondensation and highly selective photocyclicaromataization of 1/3 helical cis-cis polyphenylacetylenes with polymerizable groups. By the original methods, new well-defined sheet polymers having nanopores or nanospaces have been synthesized for the first time. Their composite membranes, containing small amounts (1.0 wt%) of sc(Rf), had ultrahigh oxygen permeability (Po2 > 1000 barrer), and their plots were beyond the Robeson’s upper bound line in the graph of oxygen permselectivity (α = Po2/PN2) versus Po2. Both α and Po2 values were enhanced by adding only small amounts (1.0 wt%) of sc(Rf). One of the sc(Rf)s synthesized on the base membrane surface showed the best performance, i.e., Po2 = 5300 barrer and α = 2.5. The membrane surface was effectively covered by sc(Rf), judging from the contact angle values. It is thought that nanopores and nanospaces created in and between sc(Rf) molecules played an important role for the enhancement of both α and Po2/PN2.

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