Effects of calcium silicate synthesized in situ on Fiber loading and paper properties

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yongzhen An ◽  
Haitang Liu ◽  
Jing Liu ◽  
Xuexiu Li ◽  
Jie Li ◽  
...  
Keyword(s):  
Reaction Time ◽  
Calcium Silicate ◽  
Rotation Speed ◽  
Ash Content ◽  
Paper Properties ◽  
Fiber Loading ◽  
Hardwood Pulp ◽  
Loading Amount ◽  
Theoretical Amount

Abstract The in-situ synthesis of calcium silicate in the fiber can not only meet the requirements for high loading of paper, but also make up and improve the reduction of paper performance caused by filling. In this investigation, the effects of pulp type, beating degree, fiber ratio, reaction time, rotational speed, dosage of lime milk and dispersant on calcium silicate loading and paper properties were investigated. The results showed that when the beating degree was 40 °SR, the ratio of softwood and hardwood pulp was 1:1, the reaction time was 60 min, the rotation speed was 600 r·min−1, the dosage of lime milk was 1.33 times of the theoretical amount, and the dosage of cationic polyacrylamide was 0.3 % (absolutely dry pulp), the ash content of hand-made sheet was 41.2 %, and the loading amount of calcium silicate was 26.3 %. Under this condition, the comprehensive performance of paper was the best.

scholarly journals The Boring Sounding of Alluvial Soils

2016 ◽  
Author(s):  
Gennadii Boldyrev ◽  
Gennadii Novichkov
Keyword(s):  
Axial Force ◽  
Rotation Speed ◽  
Linear Velocity ◽  
Alluvial Soils ◽  
Soil Deformation ◽  
In Situ Test ◽  
Drilling Parameters ◽  
Tip Resistance ◽  
Deformation Properties

In article the description and results of in situ test of soils is resulted by of Russian drilling test (RDT). It involves several drilling parameters: torque, axial force, rotation speed, linear velocity, tip resistance for identifying soil strata of different strengths and for determining dependences between drilling parameters and soil deformation properties.

Study on the Properties of Aerodynamic Reference Sound Sources

2019 ◽  
Vol 105 (6) ◽  
pp. 960-969 ◽  
Author(s):  
Spyros Brezas ◽  
Volker Wittstock
Keyword(s):  
Ambient Temperature ◽  
Atmospheric Pressure ◽  
Rotation Speed ◽  
Near Field ◽  
Sound Power ◽  
Sound Sources ◽  
The Core ◽  
In Situ Conditions ◽  
Calibration Condition

Towards the establishment of traceability in sound power in airborne sound, the present study focuses on the dissemination procedure. Aerodynamic reference sound sources were studied as potential transfer standards. Initially, the sources were examined in the up-to-present requirements. The core of the study is the correction required for the transition from calibration to in situ conditions. The influence of atmospheric pressure, ambient temperature and fan rotation speed was investigated and the corresponding correction was determined. A comparison to an existing correction was also performed. Near field effects were another part of the study. The related uncertainty was estimated in a transparent approach. The dependency of the uncertainty on the in situ and calibration condition values is also presented.

scholarly journals Flame-Retardant and Smoke Suppression Properties of Nano MgAl-LDH Coating on Bamboo Prepared by an In Situ Reaction

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Xiaoling Yao ◽  
Chungui Du ◽  
Yating Hua ◽  
Jingjing Zhang ◽  
Rui Peng ◽  
...  
Keyword(s):  
Reaction Time ◽  
Flame Retardant ◽  
Building Materials ◽  
Reaction Times ◽  
Step Method ◽  
In Situ Reaction ◽  
One Step ◽  
Double Hydroxide ◽  
Optimal Reaction

In recent years, bamboo has been widely used for building materials and household goods. However, bamboo is flammable, so a flame-retardant treatment for bamboo is urgently needed. In this work, nano MgAl-layered double hydroxide (MgAl-LDH) coated on bamboo, which was called MgAl-LB, was synthesized by an in situ one-step method. To determine the optimal in situ time, the effects of different reaction times on LDH growth on the bamboo surface and the flame retardancy of the MgAl-LBs were investigated. The SEM observations show that LDH growth on the surface of bamboo was basically saturated when the in situ reaction time was 24 h. Abrasion experiments show that MgAl-LDH coating has good abrasion resistance. The fire performance of the MgAl-LBs was evaluated by cone calorimeter tests, which indicated that the THR and TSP of the MgAl-LBs were significantly lower than those of untreated bamboo. Taking into account the energy consumption problem, determining the reaction time of 24 h is the optimal reaction time. Compared with untreated bamboo, the THR and TSP of MgAl-LB prepared at 24 h decreased by 33.3% and 88.9%, respectively.

Hypervalent Iodine(III)-Catalyzed Epoxidation of β-Cyanostyrenes

Synthesis ◽  
2019 ◽  
Vol 51 (23) ◽  
pp. 4473-4486 ◽  
Author(s):  
Saeesh R. Mangaonkar ◽  
Fateh V. Singh
Keyword(s):  
Reaction Time ◽  
Room Temperature ◽  
Hypervalent Iodine ◽  
Short Reaction Time ◽  
Convenient Approach

A convenient approach for the synthesis of β-cyanoepoxides is illustrated by iodine(III)-catalyzed epoxidation of electron-deficient β-cyanostyrenes, wherein the active catalytic iodine(III) species was generated in situ. The epoxidation of β-cyanostyrenes was performed using 10 mol% PhI as precatalyst in the presence of 2.0 equivalents Oxone as an oxidant and 2.4 equivalents of TFA as an additive at room temperature under ultrasonic radiations. The β-cyanoepoxides were isolated in good to excellent yields in a short reaction time.

scholarly journals Use of open source monitoring hardware to improve the production of MOFs: using STA-16(Ni) as a case study

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Felicity Massingberd-Mundy ◽  
Stephen Poulston ◽  
Stephen Bennett ◽  
Hamish Hei-Man Yeung ◽  
Timothy Johnson
Keyword(s):  
Reaction Time ◽  
Open Source ◽  
Source Monitoring ◽  
Metal Organic Framework ◽  
In Situ Monitoring ◽  
Single Experiment ◽  
Metal Organic ◽  
Economic Tools ◽  
Open Source Hardware

Abstract Affordable and readily available microelectronics are becoming prevalent in teaching laboratories however these useful and economic tools are not used widely in either academia or industry. Herein we report how a metal organic framework (MOF) synthetic route can be optimized using an in situ monitoring apparatus designed in-house on open source hardware for under $100. We demonstrate that the MOF can be produced at atmospheric pressure, an improvement over previous reports, but also with a reduction in reaction time of 93%. This improvement in reaction time was predicted after a single experiment using the monitoring kit showing how efficiencies in the lab can be gained with very little experimental and monetary overhead while minimising the resources used.

Influence of Polypropylene Reaction Time on the Clay Exfoliation Process by In Situ Polymerization

2017 ◽  
Vol 17 (7) ◽  
pp. 5095-5103 ◽  
Author(s):  
Maria De Fatima V Marques ◽  
Rodrigo Moreira Fernandes
Keyword(s):  
Reaction Time ◽  
In Situ Polymerization

Is the dentifrice containing calcium silicate, sodium phosphate, and fluoride able to protect enamel against chemical mechanical wear? An in situ/ex vivo study

2019 ◽  
Vol 23 (10) ◽  
pp. 3713-3720 ◽  
Author(s):  
Franciny Querobim Ionta ◽  
Natália Mello dos Santos ◽  
Isabela Maníglia Mesquita ◽  
Evandro José Dionísio ◽  
Thiago Cruvinel ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
Sodium Phosphate ◽  
Ex Vivo ◽  
Mechanical Wear ◽  
Ex Vivo Study
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