Lightly branched poly(vinyl alcohol) for fluid loss additive

Han, Haifeng; Zhang, Junhua

doi:10.1002/app.39741

Cited by 10 publications

(7 citation statements)

References 30 publications

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“…The characteristic peaks of Cl 2p (Figure 3e) at 199.48 and 197.88 eV were attributed to Cl − Cl 2p 1/2 and 2p 3/2 50 . In addition, the peaks at 529.78 and 531.78 eV binding energies in the O 1s spectrum of Figure 3f corresponded to the bond of BiO in the BiOCl lattice and the TiO bond in TiO 2 , respectively 51,52 . Comparison of the XPS of TiO 2 /PAN (Figure S1) reveals that the peaks of Ti 2p 1/2 shift toward high binding energy, and the peaks belonging to the OTi bonds in O 1s shift toward low binding energy, then, combined with the XRD, we can conjecture that there is an interaction between BiOCl and TiO 2 .…”

Section: Resultsmentioning

confidence: 94%

A ternary composite hydrophilic electrospinning membrane containing Au for fast oil–water separation and antibiotics degradation

Qi,

Gao,

et al. 2024

J of Applied Polymer Sci

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Water pollution from industrial wastewater and oil spills, which threat marine lives and mankind continually have turned into one of the most severe challenges in worldwide due to the fast development of global industrialization and human activities. Various water‐treatment methods have been developed to solve the problems. However, these processes are often complicated and costly, making them fail to address the complicate water environment. Herein, a visible light‐responsive Au‐BiOCl/TiO2/PAN composite membrane with hydrophilic surface was prepared by combing electrospinning with solvothermal method. The composite membranes can efficiently separate emulsions with the highest flux of 50.16 L m−2 h−1 and oil/water mixtures (the highest flux was 4777.07 L m−2 h−1 bar−1). Moreover, the membranes can rapidly degrade antibiotics with an excellent degradation rate (95.70% in 60 min) under the visible light. Additionally, they can simultaneously degrade organic dye and separate oil/water emulsions under a gravity condition. It is expected that composite membranes will be an attractive candidate for complex wastewater treatment.

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Section: Resultsmentioning

confidence: 94%

A ternary composite hydrophilic electrospinning membrane containing Au for fast oil–water separation and antibiotics degradation

Qi,

Gao,

et al. 2024

J of Applied Polymer Sci

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“…In particular, a cross-linking technique was utilized to form a solid polymeric network dispersed in a material matrix. In previous research, cement-based materials showed an obvious retarding side effect when using cross-linked PVA polymers for filming effect [6,8,16,22]. However, the cross-linked network was stable with higher mechanical strength.…”

Section: Introductionmentioning

confidence: 93%

“…Dias et al [7], Han and Zhang [8], and Cui et al [9] depicted that molecular structure characteristics of the polymeric fluid loss additive were the key points to improve fluid loss additive application effectiveness. Salami and Plank depicted that the highly dispersed grafting polymer structure was beneficial to overcome unnecessary side effects when contacting with electrolyte matters, such as metal ions [10].…”

Section: Introductionmentioning

confidence: 99%

“…As shown as Tables 4 and 5, due to the positive effects of higher content of SXY-2 added to the new additive formula (FLA A and PVAGB combined) ((9) compared with (9 ′ )), 0.75%BWOC showed better fluid loss control ability compared with 0.25/0.5%BWOC, so SXY-2 of 0.75%BWOC content could be utilized. And relatively higher content of PVAGB could be better for the fluid loss control ability when combined with FLA A; as (5) compared with (8), fluid loss volume was decreased from 65 mL to 33 mL (average value) when PVAGB content increased from 0.15%BWOC to 0.2%BWOC combined with 0.75%BWOC FLA A. Besides, due to the coordination effect of the PVAGB effect to FLA A with less content and comparison with FLA A, we selected 0.2%BWOC PVAGB/0.5%BWOC FLA A additive formula for further research, i.e., as the research background of SEM analysis and ZETA potential test.…”

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confidence: 99%

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Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material

Wang

Zheng³

et al. 2020

International Journal of Polymer Science

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In this research, a kind of 2-acrylamido-2-methylpropanesulfonic acid sodium salt-(AMPS-Na-) type copolymer additive, the fluid loss additive (FLA), named as FLA A additive, was used for research. The performance of FLA A was tested and found to fail in the effective control of free water and to hinder the hydration process for delaying the breaking of the early hydration shell. The reason for it was the absorbed behavior and chelating effect of the AMPS-Na unit to Ca 2+ hydrating cement particles. Thus, a cationic polyvinyl alcohol (PVA) polymer, modified by glyoxal and boric acid, was discovered due to its excellence in associating with the FLA A additive for controlling the free cement-based material water amount and preventing the chelating effect of FLA A chains on the surface of the cement-based material. Glyoxal/boric acid-modified polyvinyl alcohol, abbreviated as PVAGB or PVA-G-B, was with special molecular properties, i.e., positive ZETA (ζ) potential characteristics and cross-linked molecular structure. Due to competitive absorbed behavior of glyoxal-modified hydroxyl groups and free Ca 2+ released by the hydration product, the chelating effect of AMPS-Na units to Ca 2+ was weakened and the possibility of FLA A chains being absorbed to the surface of the cement-based material was decreased. Then, the formation of a complete fluid loss system was obtained; i.e., the fluid loss volume decreased to less than 50 mL at 30°C and 108 mL at 80°C with 0.2 percentage by weight of cement (%BWOC) of PVAGB and 0.50%BWOC (percentage by weight of cement) of FLA A. Besides, the hydration process of cement-based material was accelerated due to formation of more C-S-H gels in the early hydration period. As a result, the cement-based material not only showed no worse compressive-strength retrogression but also showed a stable 28-day compressive strength of 28 MPa.

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“…Such additives include inorganic fine particles and polymer fluid loss additives [3,4]. These additives include polyvinyl alcohol film-forming fluid loss additives and polycarboxylic acid fluid loss additives; currently, the latter is most widely used [5,6]. Although carboxylic acids serve as key functional groups for water loss during take-off and landing, previous research shows that this group of fluid loss additives induces strong thickening and retarding side effects [7,8].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Performances of Carboxylic Acid Monomers as Fluid Loss Additives for Oil-Well Cement

Liu¹,

Huang²,

Zheng³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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The application of polycarboxylic acid as a fluid loss additive for cement (i.e., a substance specifically designed to lower the volume of filtrate that passes through the cement) can prolong the thickening time of cement slurries. Given the lack of data about the effects of carboxylic acid monomers as possible components for the additives traditionally used for oil-well cement, in this study different cases are experimentally investigated considering different types of these substances, concentrations, temperatures, and magnesium ion contamination. The results demonstrate that itaconic acid has a strong retarding side effect, while maleic and acrylic acids have similar influences on the thickening time of the cement slurry. The rheological properties of the cement slurry tend to deteriorate when the carboxylic acid monomer content in the fluid loss additive is increased to 40%. If the temperature exceeds 80°C, there is a significant decrease in the related impact on the thickening duration. With an increase in the intrusion of magnesium ions to >0.5%, both the rheological properties of the cement slurry and the thickening time are affected in a negative way.

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Lightly branched poly(vinyl alcohol) for fluid loss additive

Cited by 10 publications

References 30 publications

A ternary composite hydrophilic electrospinning membrane containing Au for fast oil–water separation and antibiotics degradation

A ternary composite hydrophilic electrospinning membrane containing Au for fast oil–water separation and antibiotics degradation

Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material

Assessment of the Performances of Carboxylic Acid Monomers as Fluid Loss Additives for Oil-Well Cement

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