Nanostructured Surface Coating Layer of Calcium Carbonate Composite Particles

2007 ◽  
pp. 593-596
Author(s):  
S.M. Fan ◽  
Guo Sheng Gai ◽  
Yu Fen Yang ◽  
Shao Yun Fu ◽  
He Zhuo Miao
Keyword(s):  
Calcium Carbonate ◽  
Surface Coating ◽  
Coating Layer ◽  
Composite Particles ◽  
Nanostructured Surface

Nanostructured Surface Coating Layer of Calcium Carbonate Composite Particles

2007 ◽  
Vol 280-283 ◽  
pp. 593-596 ◽  
Author(s):  
S.M. Fan ◽  
Guo Sheng Gai ◽  
Yu Fen Yang ◽  
Shao Yun Fu ◽  
He Zhuo Miao
Keyword(s):  
Calcium Carbonate ◽  
Heterogeneous Nucleation ◽  
Surface Coating ◽  
Coating Layer ◽  
Physical Adsorption ◽  
Composite Particles ◽  
Nanostructured Surface ◽  
Compact Structure ◽  
The Core ◽  
Carbonate Particle

The calcium carbonate composite particles with nanostructured surface were prepared by heterogeneous nucleation. The calcium carbonate composite particles consisted of a core of groundcalcium carbonate particle and a shell of nanometer calcium carbonate particles. The thickness of theshell of composite calcium carbonate was observed by TEM. The bond intensity between the core and the shell was measured by means of ultrasonic comminution and stirred ball milling. It was found that the composite calcium carbonate had a compact structure. The linkage between the core and shell was so strong that it must be chemical bond instead of physical adsorption.

Influence of the Coating Layer Characteristics on the Dynamic Permeability and Printing of Ink-Jet Paper

2015 ◽  
Vol 731 ◽  
pp. 447-451
Author(s):  
Zheng Jian Zhang ◽  
Ji Hui Xin ◽  
Li Ying Yang ◽  
Bo Tao Liu
Keyword(s):  
Calcium Carbonate ◽  
Polyvinyl Alcohol ◽  
Surface Coating ◽  
Coating Layer ◽  
Single Layer ◽  
Hole Diameter ◽  
Precipitated Calcium Carbonate ◽  
Dynamic Permeability ◽  
Ink Jet ◽  
Color Density

In order to investigate the influence of coating layer characteristics on the dynamic permeability and printing of ink-jet paper, coating was prepared by the precipitated calcium carbonate (PCC) and white latex used as bottom coating (recipe label:A,B),and coating formula was made by silica (SiO2) and polyvinyl alcohol used as surface coating (recipe label:a,b,c).Then paper were coated respectively on single bottom, single surface and multilayer. Then the dynamic permeability and printing of ink-jet paper were analyzed systematically. The results showed that whether single layer or multilayer, the values of Ct, Ci were minimum when the ration of pigment and adhesive was 70:30, because the hole diameter of the coating layer was smallest, and the absorption was strongest, so the dynamic permeability was best, and the ability of ink absorption was best, color density and tone reproducibility were best. It concluded that when the proportion of SiO2 and PVA was 70:30, the dynamic permeability and printing ability of ink-jet paper were relative better.

A method for measuring the in-plane compressive strength and the compression behavior of coating layers

TAPPI Journal ◽  
2011 ◽  
Vol 10 (7) ◽  
pp. 29-34
Author(s):  
TEEMU PUHAKKA ◽  
ISKO KAJANTO ◽  
NINA PYKÄLÄINEN
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Calcium Carbonate ◽  
Coating Layer ◽  
Test Methods ◽  
Coating Films ◽  
Precipitated Calcium Carbonate ◽  
Coating Color ◽  
Mineral Coatings ◽  
Styrene Butadiene

Cracking at the fold is a quality defect sometimes observed in coated paper and board. Although tensile and compressive stresses occur during folding, test methods to measure the compressive strength of a coating have not been available. Our objective was to develop a method to measure the compressive strength of a coating layer and to investigate how different mineral coatings behave under compression. We used the short-span compressive strength test (SCT) to measure the in-plane compressive strength of a free coating layer. Unsupported free coating films were prepared for the measurements. Results indicate that the SCT method was suitable for measuring the in-plane compressive strength of a coating layer. Coating color formulations containing different kaolin and calcium carbonate minerals were used to study the effect of pigment particles’ shape on the compressive and tensile strengths of coatings. Latices having two different glass transition temperatures were used. Results showed that pigment particle shape influenced the strength of a coating layer. Platy clay gave better strength than spherical or needle-shaped carbonate pigments. Compressive and tensile strength decreased as a function of the amount of calcium carbonate in the coating color, particularly with precipitated calcium carbonate. We also assessed the influence of styrene-butadiene binder on the compressive strength of the coating layer, which increased with the binder level. The compressive strength of the coating layer was about three times the tensile strength.

Effect of a thin surface coating layer on thermal stresses within an elastic half-plane

2006 ◽  
Vol 185 (3-4) ◽  
pp. 227-243 ◽  
Author(s):  
J. Yoon ◽  
C. Q. Ru ◽  
A. Mioduchowski
Keyword(s):  
Half Plane ◽  
Surface Coating ◽  
Thermal Stresses ◽  
Coating Layer

Improving Performance of BaCo0.7Fe0.2Nb0.1O3-δ Ceramic Membrane by a Surface-Coating Layer for Partial Oxidation of Coke Oven Gas

2010 ◽  
Vol 154-155 ◽  
pp. 877-881 ◽  
Author(s):  
Hong Wei Cheng ◽  
Xiong Gang Lu ◽  
Da Hai Hu ◽  
Yu Wen Zhang ◽  
Wei Zhong Ding ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Surface Coating ◽  
Ceramic Membrane ◽  
Coating Layer ◽  
Coke Oven ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Coke Oven Gas ◽  
Oxygen Permeation Flux ◽  
Partial Oxidation Reforming

The BaCo0.7Fe0.2Nb0.1O3-δ (BCFNO) membranes combined with Ce0.8Re0.2O2-δ (Re=La, Y) layer on the permeation side were used for hydrogen production by partial oxidation reforming of coke oven gas (COG). The Ce0.8Re0.2O2-δ improved the oxygen permeation flux of the membrane by 11–28% at 750 oC. The high oxygen permeation flux achieved using the Ce0.8Re0.2O2-δ surface-coating layer in this work are quite encouraging with a maximum value reaching 19.7 ml/cm2•min at 900 oC, which will be promising surface modification materials in the catalytic partial oxidation reforming of COG.

Broadening the reflection bandwidth of polymer-stabilized cholesteric liquid crystal via a reactive surface coating layer

2017 ◽  
Vol 56 (20) ◽  
pp. 5731 ◽  
Author(s):  
Jongyoon Kim ◽  
Hyungmin Kim ◽  
Seongil Kim ◽  
Suseok Choi ◽  
Wonbong Jang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Surface Coating ◽  
Coating Layer ◽  
Cholesteric Liquid Crystal ◽  
Reactive Surface ◽  
Polymer Stabilized

Investigation into Coating Surface Free Energy and Microstructure of Coated Paper Related to Pigment

2014 ◽  
Vol 884-885 ◽  
pp. 212-215
Author(s):  
Ying Li ◽  
Wen Juan Gu ◽  
Bang Gui He
Keyword(s):  
Free Energy ◽  
Calcium Carbonate ◽  
Surface Free Energy ◽  
Coating Layer ◽  
Physical Structure ◽  
Coated Paper ◽  
Paper Surface ◽  
Pigment Coating ◽  
Printing Ink ◽  
Better Than

The physical structure of coating layer have an important influence on transferring and setting of the printing ink. In this study, the effect of pigment on surface microstructure and surface free energy was investigated. The findings indicated that the pigment affected the pore size, depth and distribution of the coated paper surface. Kaolin pigment compared with calcium carbonate pigment was good to improve the paper surface smoothness. Surface free energy of kaolin pigment coating was higher than calcium carbonate pigment coating, which showed that surface wettability of coating with kaolin pigment was better than calcium carbonate pigment.

Improving the oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3−δ membranes by a surface-coating layer of GdBaCo2O5+δ

2008 ◽  
Vol 28 (16) ◽  
pp. 3125-3130 ◽  
Author(s):  
Yingfang Wang ◽  
Haoshan Hao ◽  
Jianfeng Jia ◽  
Delin Yang ◽  
Xing Hu
Keyword(s):  
Surface Coating ◽  
Oxygen Permeability ◽  
Coating Layer

Study of Coating Binder Migration and Affected Parameters

2013 ◽  
Vol 790 ◽  
pp. 45-48 ◽  
Author(s):  
Zhao Hui Zhen ◽  
Zheng Shun Wang
Keyword(s):  
Calcium Carbonate ◽  
Cross Section ◽  
Coating Layer ◽  
Solid Content ◽  
Pigment Content ◽  
Drying Temperature ◽  
Coating Surface ◽  
Pigment Type ◽  
Binder Concentration ◽  
Coating Color

Because of the coating binder migration in cross-section of coating layer, the binder concentration will be different in z-direction of coating layer, which affect some properties of coated paper. The Paper studied the effects of pigment type, coating color solid content and dying temperature on binder migration and affected factors. The z-direction distribution of the coating binder which was tagged with Br in coating layer and its concentration in coating surface were examined quantitatively by using SEM-EDXA and ESCA analysis. The mechanism of binder migration was also proposed. The results indicated that the degree of binder migration is directly proportional to the drying temperature, that the increase of the ratio of calcium carbonate in the pigment content, coating surface binder concentration increased. The result also indicated that the degree of binder migration was increased with reduced the coating solid content.

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