scholarly journals Lamination Curing Method for Inkjet Printed Flexible Angle Sensors

2021 ◽  
Author(s):  
Dila Türkmen ◽  
Merve Acer Kalafat
Keyword(s):  
Sheet Resistance ◽  
Single Layer ◽  
Time Dependent ◽  
Curing Time ◽  
Thermal Curing ◽  
Curing Methods ◽  
Curing Method ◽  
Lower Sheet Resistance ◽  
Sensing Performance ◽  
Pet Substrate

In this paper we present the lamination curing as a stand-alone method to activate the silver nanoparticle (Ag NP) inkjet printed angle sensors on a 0.14 mm PET substrate, with a desktop printer. (With the term “lamination curing”, we refer passing the printed sample through a lamination machine, without any actual laminating purpose, only for curing.) We compared the method with the oven curing, which is the widest used method for the intended sensors, and found that lamination cured sensors give lower sheet resistance, lower fabrication uncertainty and more consistent angle sensing behaviors with higher sensing performance. Different curing parameters are inspected and a process under 3 minutes is achieved giving a 0.06 Ohm/square sheet resistance. For such a low sheet resistance, presented method has the lowest thermal curing time among all single layer Ag NP printing studies in the literature. An experimental model is presented for the sheet resistance - aspect ratio relation for both methods. Time dependent resistance shifts of the lamination cured sensors are also inspected and proved to be insignificant. We state lamination curing as an advantageous and reliable alternative to oven curing and other fast curing methods both for sensor and circuitry printing implementations.

scholarly journals Lamination Curing Method for Inkjet Printed Flexible Angle Sensors

2021 ◽  
Author(s):  
Dila Türkmen ◽  
Merve Acer Kalafat
Keyword(s):  
Sheet Resistance ◽  
Single Layer ◽  
Time Dependent ◽  
Curing Time ◽  
Thermal Curing ◽  
Curing Methods ◽  
Curing Method ◽  
Lower Sheet Resistance ◽  
Sensing Performance ◽  
Pet Substrate

In this paper we present the lamination curing as a stand-alone method to activate the silver nanoparticle (Ag NP) inkjet printed angle sensors on a 0.14 mm PET substrate, with a desktop printer. (With the term “lamination curing”, we refer passing the printed sample through a lamination machine, without any actual laminating purpose, only for curing.) We compared the method with the oven curing, which is the widest used method for the intended sensors, and found that lamination cured sensors give lower sheet resistance, lower fabrication uncertainty and more consistent angle sensing behaviors with higher sensing performance. Different curing parameters are inspected and a process under 3 minutes is achieved giving a 0.06 Ohm/square sheet resistance. For such a low sheet resistance, presented method has the lowest thermal curing time among all single layer Ag NP printing studies in the literature. An experimental model is presented for the sheet resistance - aspect ratio relation for both methods. Time dependent resistance shifts of the lamination cured sensors are also inspected and proved to be insignificant. We state lamination curing as an advantageous and reliable alternative to oven curing and other fast curing methods both for sensor and circuitry printing implementations.

Improvement of physicomechanical properties of grafted coir fiber with ethyleneglycol dimethacrylate: effect of UV radiation

2012 ◽  
Vol 32 (2) ◽  
Author(s):  
Haydar U. Zaman ◽  
Mubarak A. Khan ◽  
Ruhul A. Khan
Keyword(s):  
Monomer Concentration ◽  
Curing Temperature ◽  
Coir Fiber ◽  
Curing Time ◽  
Thermal Curing ◽  
Optimum Conditions ◽  
Coir Fibers ◽  
Different Temperatures ◽  
Curing Method ◽  
Different Doses

Abstract Coir fibers were modified with ethyleneglycol dimethacrylate (EGDMA)+MeOH solutions under thermal curing method at different temperatures (50°C–90°C) and curing times (30–70 min). Monomer concentration, curing temperature, and curing time were optimized in terms of grafting and mechanical properties, and 50% EGDMA, 70°C and 50 min curing time, respectively, registered better performance. Coir fibers were pretreated with ultraviolet radiation at different doses, soaked in optimized solution, and cured under optimum conditions. These fibers showed improved properties than EGDMA-treated fibers. Water uptake and simulated weathering test of untreated and treated fibers were studied.

scholarly journals A Modified Photoactivation Protocol Using Two Simultaneous Light-Curing Units for Bonding Brackets to Enamel

2015 ◽  
Vol 26 (4) ◽  
pp. 393-397 ◽  
Author(s):  
Adauê Siegert de Oliveira ◽  
Rafael Correa Mirapalhete ◽  
Cássia Cardozo Amaral ◽  
Rafael Ratto de Moraes
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Curing Time ◽  
Thermal Cycles ◽  
Adhesive Remnant Index ◽  
Light Curing ◽  
Standard Deviations ◽  
Curing Method

<p>This study investigated the effect of a modified photoactivation protocol using two simultaneous light-curing units on the shear bond strength (SBS) of brackets to enamel. Metal brackets were bonded to bovine incisors using the resin-based orthodontic cement Transbond XT (3M Unitek). Four photoactivation protocols of the orthodontic cement were tested (n=15): Control: photoactivation for 10 s on each proximal face of the bracket at a time; Simultaneous: photoactivation for 10 s on both proximal faces of the bracket at the same time; One side-20s: photoactivation for 20 s at one proximal face of the bracket only; and One side-10s: photoactivation for 10 s only at one proximal face of the bracket. SBS was tested immediately or after 1000 thermal cycles. Adhesive remnant index (ARI) was classified. Data were subjected to two-way ANOVA and Student-Newman-Keuls' test (α=0.05). Pooled means ± standard deviations for SBS to enamel (MPa) were: 10.2±4.2 (Control), 9.7±4.5 (Simultaneous), 5.6±3.1 (One side-20s), and 4.6±1.9 (One side-10s). Pooled SBS data for immediate and thermal cycled groups were 6.3±2.6 and 8.8±5.2. A predominance of ARI scores 1-2 and 0-1 was observed for the immediate and thermally cycled groups, respectively. In conclusion, simultaneous photoactivation of the orthodontic cement using two light-curing units, one positioned at each proximal face of the bracket, yielded similar bonding ability compared to the conventional light-curing method. Photoactivation of the orthodontic cement at one proximal face of the bracket only is not recommended, irrespective of the light-curing time used.</p>

CuO meso–macroporous microspheres: calcination-time-dependent gas-sensing performance

2019 ◽  
Vol 7 (3-4) ◽  
pp. 203-209 ◽  
Author(s):  
Na-na Cai ◽  
Kun Wang ◽  
Neng Li ◽  
Tao Wang ◽  
Qi Xiao
Keyword(s):  
Gas Sensing ◽  
Time Dependent ◽  
Calcination Time ◽  
Sensing Performance

scholarly journals Size Effects in Ruthenium-Based Thick-Film Resistors: Rutile vs. Pyrochlore-Based Resistors

1991 ◽  
Vol 14 (3) ◽  
pp. 163-173 ◽  
Author(s):  
M. Prudenziati ◽  
F. Sirotti ◽  
M. Sacchi ◽  
B. Morten ◽  
A. Tombesi ◽  
...  
Keyword(s):  
Size Effect ◽  
Thick Film ◽  
Sheet Resistance ◽  
Firing Temperature ◽  
Size Effects ◽  
Conductive Phase ◽  
Lower Sheet ◽  
Lower Sheet Resistance

The size effect, namely the change of sheet resistance, Rsas a function of resistor length, has been investigated in layers whose conductive phase evolves from Pb-rich (Ru-deficient pyrochlores) to Pb2Ru2O6.5and finally to RuO2by increasing the firing temperature. It is found that Bi diffusion from the terminations is responsible for lower sheet resistance values in shorter resistors whatever the conductive phase is. On the contrary, Ag diffusion is responsible for lower sheet resistance values in shorter resistors only in the case of ruthenate conductive grains while the reverse is observed in RuO2-based layers. Size effect can be suppressed with Pt/Au-based terminations provided that no Bi is contained and with Au-metallorganic-based contact provided that the peak firing temperature is not too high.

STRENGTH OF POROUS CONCRETE PAVEMENT AT DIFFERENT CURING METHODS

2015 ◽  
Vol 76 (14) ◽  
Author(s):  
Mohd Ibrahim Mohd Yusak ◽  
Ramadhansyah Putra Jaya ◽  
Mohd Rosli Hainin ◽  
Che Ros Ismail ◽  
Mohd Haziman Wan Ibrahim
Keyword(s):  
Concrete Strength ◽  
Concrete Pavement ◽  
Experimental Results ◽  
Conventional Concrete ◽  
Curing Conditions ◽  
Porous Concrete ◽  
Curing Methods ◽  
And Performance ◽  
Curing Method ◽  
Tensile Splitting Strength

Porous concrete pavement has been used in some countries as a solution to environmental problems. Contrary to conventional concrete pavement, there is still lack of knowledge in some areas of production and performance of porous concrete pavement. One of the issue concern is curing conditions. These greatly affect the performance of porous concrete pavement. This paper elaborates the experimental results examining the influence of curing method and makes a comparison between five different curing methods on the strength of porous concrete pavement specimens. The properties analyzed include compressive strength, tensile splitting strength and flexural strength. The experimental results indicate that the different curing methods give a different effect to concrete strength. Based on the results obtained in this experiment, curing method by using polyethylene bag promise a good result and better performance to porous concrete pavement specimen strength.

scholarly journals Directed self-assembly of rhombic carbon nanotube nanomesh films for transparent and stretchable electrodes

2015 ◽  
Vol 3 (10) ◽  
pp. 2319-2325 ◽  
Author(s):  
Sehee Ahn ◽  
Ayoung Choe ◽  
Jonghwa Park ◽  
Heesuk Kim ◽  
Jeong Gon Son ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Sheet Resistance ◽  
Self Assembly ◽  
Lower Sheet ◽  
Mechanical Durability ◽  
Lower Sheet Resistance ◽  
Nanotube Films

Directed self-assembly of carbon nanotubes into 2D rhombic nanomesh films results in greatly lower sheet resistance, higher stretchability, and better mechanical durability than those of random carbon nanotube films.

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