Study of the effect of polyanionic cellulose (PAC) on drilling mud wastage

Drilling mud is made from well solids or heavy materials and has a high viscosity. They only use water to dilute it.

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Drilling mud is an important fluid in drilling operations and plays a major role in accelerating or delaying it. Flower
Drilling can also affect drilling time and costs. This fluid is available in three types: gas base, oil base and water base
There is. Due to the restrictions on the use of gas-based and oil-based flowers, as well as due to the characteristics of water-based flowers
These types of flowers are more important due to their compatibility with the environment and the ease of working with them. To improve
Rheological properties and increasing the efficiency of water-based flowers in controlling smoothness and thermal stability, various researches
Done. Attempts were made to achieve this by using various additives in water-based flowers and better fluidity in drilling operations.
To be obtained.

An environmentally friendly method in the preparation of biosorbents based on carboxymethylcellulose

Recently, with the advancement of technology, new materials enter the market that have various applications and meet the needs of communities in the fields of agriculture, medicine, drug release and control, cosmetics, industrial wastewater treatment and environmental pollutants.

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Pollution of the environment by Entwala is one of the most important
Concerns of environmental scientists in the last decade. Polymers
Water-insoluble hydrophilic with the ability to adsorb adsorbents, one of
New materials are considered in the control and removal of additives. In this study,
Carboxymethylcellulose powder (CMC 82% and /) with a purity of 2%
0 was used. Objective of producing a superfood of rosacea / degree of substitution 5
Eco-friendly and environmentally friendly biodegradable baton.Give me a tour first
Insolubility of CMC powder was tested over a wide range of temperatures and times
180 ° C and bushes, 125, of which the combination of temperatures 165
60 and 45 minutes were selected. Oppression, power, order of your time up to 90
Specifics of each of the thermal correction conditions were weighed and mixed with water
5, 3, 5, 2, 0, 5, 0, 3, 0 Beta-citric acid binding agent 1
15% and 20% of the weight of the unmodified sample polymer, 10
Heat control and correction were added. The following are examples in terms
Specify the time and temperature of drying.Samples produced under tests
Tea bag, ion sensitivity, adsorption under load, deformation and gutter size
Inflation time was assessed and evaluated. The results showed that the term anatomy
Thermal successfully eliminated the need to use a cross connector
Made so that the maximum absorption values ​​in all tests tested
In small amounts, the addition of a crosslinking agent was observed

Preparation of cellulose nanocrystals from alpha cellulose and optimization of its manufacturing conditions

Over the last two decades, cellulose nanocrystals have been widely studied as a biodegradable and biocompatible material.

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Is a new group of cellulosic materials that in the last two decades in various research fields of applications (CNC) of nanocrystalline cellulose
Has found wide. These nanoparticles are often prepared by acid hydrolysis of cellulosic compounds such as wood, cotton, starch, etc.
The main purpose of this study was to find the optimal conditions for making a stable colloidal suspension in water from alpha cellulose nanocrystals.
Cellulose is a highly efficient method; Therefore, different conditions of reaction temperature and time were selected for acid hydrolysis. Percentage
The yield was calculated for all resulting suspensions.Morphology of cellulose nanocrystals prepared using a microscope
Crystallinity was investigated using (ESEM) and peripheral electron scanning electron microscopy (TEM)
Was measured. The results showed that the highest efficiency of cellulose nanocrystals (88%) in 60 minutes and (XRD) X-ray diffraction
35 nm and high crystallinity - temperature of 60 ° C was obtained. In general, obtained bar-shaped crystals with dimensions 50
(92%) of alpha cellulose can make it a suitable and competitive source for the production of cellulose nanocrystals required by various industries

Optimization of process variables of carboxymethylcellulose production from alpha cellulose obtained from cotton linters using surface response method

Cellulose is a natural polysaccharide and linear polymer that is produced by solar energy in various plants and acts as a major structure in the cell wall of plants.

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Carboxymethylcellulose (CMC) is one of the most important cellulose derivatives widely used in the manufacture of coriander as an emulsifier.
Stabilizer, dispersant, thickener and gel agent are used. The main raw material for the production of cellulose derivatives, from cellulose
Available in wood and cotton liner. In this study, alpha cellulose from cotton liner was used to produce CMC. process
Alkalization with sodium hydroxide was used to extract cellulose from cotton liner alpha cellulose and then CMC was produced from cellulose.
Optimization of reaction conditions was studied using surface response method (RSM). The experimental design was the Box-Benken method, which included three factors
Reaction time, sodium hydroxide concentration and mass ratio of monochloroacetic acid (MCA) to cellulose in the etching process (according to age level)
is. Based on this design, the optimal values ​​of the independent variables including reaction time, sodium hydroxide concentration and mass ratio of MCA coriander
It was found that in this case the values ​​of / 47% and 54.44 minutes, / 95 / cellulose were 93 DS 0 and / and the viscosity was 656 cP, respectively.
6634/96. To determine the characteristics of alpha cellulose cotton liner and manufactured products, Fourier transform infrared (FTIR) of selected samples.

Application of new stabilization engineering techniques to increase the efficiency of antibody stabilization on the surface of nitrocellulose and nylon substrates for use in diagnostic systems

Depending on the type of substrate, the type of processing may vary. It is also possible that the physical and chemical properties of the substrate, such as capillary properties, flexibility, surface loads, etc., are altered and have a negative effect on the stabilization quality.

amir mirshafiei 0 1002 Article rating: 3.0
Stabilization of biomolecules on different substrates in a way that preserves its properties and increases efficiency The most basic
The foundation is for designing and manufacturing biosensors. Antibodies are one of the most important efficient molecules for this purpose
is. The aim of this study was to increase the efficiency of antibody fixation on nitrocellulose and nylon substrates.

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