New insights into the capillary retention force and the work of adhesion

2021 ◽  
pp. 128195
Author(s):  
Rafael de la Madrid ◽  
Huy Luong ◽  
Jacob Zumwalt
Keyword(s):  
Work Of Adhesion ◽  
Retention Force

How the work of adhesion affects the mechanical properties of silica-filled polymer composites

1994 ◽  
Vol 29 (9) ◽  
pp. 2406-2416 ◽  
Author(s):  
S. W. Shang ◽  
J. W. Williams ◽  
K. -J. M. Söderholm
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Work Of Adhesion ◽  
Filled Polymer

scholarly journals Substrate adhesion evolves non-monotonically with processing time in millimeter-scale aligned carbon nanotube arrays

Nanoscale ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 261-271
Author(s):  
Ashley L. Kaiser ◽  
Dale L. Lidston ◽  
Sophie C. Peterson ◽  
Luiz H. Acauan ◽  
Stephen A. Steiner ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Adhesion Strength ◽  
Processing Time ◽  
Effective Modulus ◽  
Work Of Adhesion ◽  
Process Time ◽  
Nanotube Arrays ◽  
Substrate Adhesion ◽  
Carbon Nanotube Arrays

Aligned carbon nanotube (CNT) array adhesion strength evolves with CNT process time, decreasing and then increasing during growth and annealing, as captured by models relating CNT diameter, array effective modulus, and CNT–substrate work of adhesion.

A simplified formulation of adhesion problems with elastic plates

2009 ◽  
Vol 465 (2107) ◽  
pp. 2217-2230 ◽  
Author(s):  
Carmel Majidi ◽  
George G. Adams
Keyword(s):  
Potential Energy ◽  
Contact Area ◽  
Contact Region ◽  
Bending Moment ◽  
Total Potential Energy ◽  
Work Of Adhesion ◽  
Contact Radius ◽  
Algebraic Complexity ◽  
Elastic Plates ◽  
Total Potential

The solution of adhesion problems with elastic plates generally involves solving a boundary-value problem with an assumed contact area. The contact region is then found by minimizing the total potential energy with respect to the contact area (i.e. the contact radius for the axisymmetric case). Such a procedure can be extremely long and tedious. Here, we show that the inclusion of adhesion is equivalent to specifying a discontinuous internal bending moment at the contact region boundary. The magnitude of this moment discontinuity is related to the work of adhesion and flexural rigidity of the plate. Such a formulation can greatly reduce the algebraic complexity of solving these problems. It is noted that the related plate contact problems without adhesion can also be solved by minimizing the total potential energy. However, it has long been recognized that it is mathematically more efficient to find the contact area by specifying a continuous internal bending moment at the boundary of the contact region. Thus, our moment discontinuity method can be considered to be a generalization of that procedure which is applicable for problems with adhesion.

scholarly journals Preparation of irreversible hydrocolloids to improve retention of complete dentures

2008 ◽  
Vol 61 (3-4) ◽  
pp. 131-134
Author(s):  
Ljiljana Aleksov ◽  
Sasa Stankovic ◽  
Zorica Ajdukovic
Keyword(s):  
Clinical Research ◽  
Dimensional Change ◽  
Complete Dentures ◽  
Consistency Analysis ◽  
Working Models ◽  
Retention Force ◽  
Impression Materials ◽  
Research Show

Introduction Precise reproduction of anatomical-morphological details of dentures support on working models presupposes adequate application of modern impression materials and casting procedure, as well as minimal dimensional change of these materials. The aim of the study: experimental and clinical research is connected to irreversible hydrocolloids and the objective was to examine the most suitable consistency of the alginate as the impression mass for the purpose of improving retention of complete dentures. Material and methods This research included 35 completely toothless patients, most of who had already had complete dentures, 40-80 years of age and of both sexes. Static adhesion was measured with aery late plates made of adequate corresponding and various models depending on consistency of the irreversible hydrocolloids. Each model was cut into three parts, the cuts obtained were mutually compared, and computerized graphic charts of each section were made. Results The results of the research show that there is a greater retention force in the acrylate plates obtained on models castled on an anatomical impression base taken with irreversible hydrocolloides of solid consistency. Analysis of the results shows such quality of impressed tissues that they are practically slightly displaced by the impressions regardless of the consistency of the material impressed. Conclusion In conclusion it is pointed out that the preparation of irreversible hydrocolloides must be carried out by strictly obeying the powder-water weight ratios. The sections of the models obtained by irreversible hydrocolloides of various consistencies, that is by applying different pressures, point to minimal displacement of tissues and great differences in the retention force in favor of the compressive impression.

scholarly journals Improving Drug Loading of Mucosal Solvent Cast Films Using a Combination of Hydrophilic Polymers with Amoxicillin and Paracetamol as Model Drugs

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Joshua Boateng ◽  
Justine Mani ◽  
Farnoosh Kianfar
Keyword(s):  
Drug Loading ◽  
Film Surface ◽  
Work Of Adhesion ◽  
Drug Dissolution ◽  
X Ray ◽  
Drug Diffusion ◽  
Molecular Dispersion ◽  
Swelling Capacity ◽  
Solvent Cast ◽  
Polymer Erosion

Solvent cast mucosal films with improved drug loading have been developed by combining carboxymethyl cellulose (CMC), sodium alginate (SA), and carrageenan (CAR) using paracetamol and amoxicillin as model drugs and glycerol (GLY) as plasticizer. Films were characterized using X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), folding resilience, swelling capacity, mucoadhesivity, and drug dissolution studies. SA, CMC, and GLY (5 : 3 : 6) films showed maximum amoxicillin loading of 26.3% whilst CAR, CMC, and GLY (1 : 2 : 3) films had a maximum paracetamol loading of 40%. XRPD analysis showed different physical forms of the drugs depending on the amount loaded. Films containing 29.4% paracetamol and 26.3% amoxicillin showed molecular dispersion of the drugs while excess paracetamol was observed on the film surface when the maximum 40% was loaded. Work of adhesion was similar for blank films with slightly higher cohesiveness for CAR and CMC based films, but the differences were significant between paracetamol and amoxicillin containing films. The stickiness and cohesiveness for drug loaded films were generally similar with no significant differences. The maximum percentage cumulative drug release was 84.65% and 70.59% for paracetamol and amoxicillin, respectively, with anomalous case two transport mechanism involving both drug diffusion and polymer erosion.

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