Dual effects of acid etching on cell responses and mechanical properties of porous titanium with controllable open‐porous structure

In order to improve the value-added applications of low-quality wood, a novel composite, wood-polymer composite, was fabricated by in-situ terpolymerization of MMA, VAc and St within wood porous structure. The structure of the composite and the reaction of monomers within wood were both analyzed by SEM and FTIR, and the mechanical properties were also evaluated. The SEM observation showed that the polymer mainly filled up wood pores, suggesting good polymerizating crafts. The FTIR results indicated that under the employed crafts, three monomers terpolymerized in wood porous structure, and grafted onto wood matrix through reaction of ester group from monomers and hydroxyl group from wood components, suggesting chemical combination between the two phases. The mechanical properties of the wood-polymer composite involving modulus of rupture, compressive strength, wearability and hardness were improved 69%, 68%, 36% and 210% over those of untreated wood, respectively. Such method seems to be an effective way to converting low-quality wood to high-quality wood.

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Space-holder effect on designing pore structure and determining mechanical properties in porous titanium

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2013.12.078 ◽

2014 ◽

Vol 57 ◽

pp. 712-718 ◽

Cited By ~ 42

Author(s):

Byounggab Lee ◽

Taekyung Lee ◽

Yongmoon Lee ◽

Dong Jun Lee ◽

Jiwon Jeong ◽

...

Keyword(s):

Mechanical Properties ◽

Pore Structure ◽

Porous Titanium ◽

Space Holder

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Synthesis of Polyvinyl Formal Sponge for Wound Care Dressing Application

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.152-153.1650 ◽

2010 ◽

Vol 152-153 ◽

pp. 1650-1659

Author(s):

Qing Hao Yang ◽

Guang Xu Cheng ◽

Zhi Cheng Zhang

Keyword(s):

Mechanical Properties ◽

Mechanical Strength ◽

Porous Structure ◽

Pore Structure ◽

Water Absorption ◽

Wound Dressing ◽

Wound Care ◽

Acid Catalyst ◽

The Other ◽

Polyvinyl Formal

In an effort to seek poly(vinyl formal) (PVFM) foams based wound dressing pad material, a series of foamed PVFM materials have been synthesized under varied conditions. The influence of conditions on the properties of PVFM foam, such as mechanical properties, water absorption, pore structure and bulk density, is well discussed individually. It has been shown that both the reactant and acid catalyst affect the degree and speed of acetalization, therefore the mechanical properties, pores continuity and water absorption of the resultant sample. The addition of Na2CO3, surfactant and CMCNa are mainly influencing the porous structure as well as the mechanical properties and water absorption. One best sample with balanced properties is obtained. It possesses higher mechanical strength and water absorption while the other properties are similar, comparing with a commercial surgical PVFM sponge (YJ-1) currently used.

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