Structure and Properties of Starch/Poly (vinyl alcohol) Film Modificated by Different Inorganic Salts

2019 ◽  
Vol 4 (2) ◽  
pp. 600-607 ◽  
Author(s):  
Wenhao Du ◽  
Ting Jiang ◽  
Mengke Shi ◽  
Zhaojie Yang ◽  
Xi Zhang
Keyword(s):  
Vinyl Alcohol ◽  
Inorganic Salts ◽  
Poly Vinyl Alcohol ◽  
Structure And Properties

Synthesis of spherical porous cross-linked glutaraldehyde/poly(vinyl alcohol) hydrogels

2016 ◽  
Vol 36 (9) ◽  
pp. 891-898
Author(s):  
Sadao Araki ◽  
Yuko Shirakura ◽  
Harufumi Suzuki ◽  
Hideki Yamamoto
Keyword(s):  
Sodium Alginate ◽  
Vinyl Alcohol ◽  
Calcium Alginate ◽  
Chloride Solution ◽  
Calcium Chloride Solution ◽  
Inorganic Salts ◽  
Poly Vinyl Alcohol ◽  
Cross Linking ◽  
Alginate Content ◽  
Calcium Alginate Gels

Abstract Spherical glutaraldehyde cross-linked poly(vinyl alcohol) (PVA) hydrogels (G-PVA) were prepared in three steps: gelatification, cross-linking, and removal of alginate. Gelatification was carried out by dropping a solution of alginate, PVA, and glutaraldehyde into a calcium chloride solution to form calcium alginate. Calcium alginate gels were prepared at 20°C, 40°C, 60°C, and 80°C to study the effect of gelatification temperature on the formation of pores on the surface of G-PVA. The effect of the alginate content was studied. PVA and glutaraldehyde were cross-linked by immersion of the gels in a solution of H2SO4 and Na2SO4. The effect of sodium alginate and inorganic salts, such as MgSO4 and K2SO4, on the formation of pores on the surface of G-PVA was confirmed.

Structure and Properties of Poly(vinyl alcohol) Hydrogels Obtained by Freeze/Thaw Techniques

2005 ◽  
Vol 222 (1) ◽  
pp. 49-64 ◽  
Author(s):  
Rosa Ricciardi ◽  
Finizia Auriemma ◽  
Claudio De Rosa
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Structure And Properties ◽  
Freeze Thaw

Synthesis and Properties of Poly(Vinyl Alcohol)/Calcium Aluminate Nanocomposites

1991 ◽  
Vol 245 ◽  
Author(s):  
Phillip B. Messersmith ◽  
Samuel I. Stupp
Keyword(s):  
Calcium Aluminate ◽  
Vinyl Alcohol ◽  
Organic Polymer ◽  
Poly Vinyl Alcohol ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
Layer Spacing ◽  
X Ray ◽  
New Class ◽  
Cementitious Systems

ABSTRACTThis paper describes the synthesis, structure and properties of a new layered nanocomposite which may have applications in cementitious systems. This material is one example of a new class of materials which consist of inorganic crystals containing intercalated organic polymer. The nanocomposite is synthesized by precipitating Ca2Al(OH)6[X]·nH2O (X=OH−, CO3−2) in the presence of poly(vinyl alcohol) (PVA). X-ray diffraction analysis indicates that the nanocomposite consists of calcium aluminate layers separated by interlayers containing anions, water and PVA. The intercalation of PVA can only be accomplished during crystal growth and is accompanied by an expansion in layer spacing from ˜8 Å to ˜18 Å. The nanocomposite exhibited enhanced thermal stability and when compacted into a cylinder was found to have more than twice the compressive strength than the pure calcium aluminate.

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