MARC details
| 000 -LEADER |
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| fixed length control field |
04311ntm a2200337 i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
MY-KuUP |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20261008114547.0 |
| 006 - FIXED-LENGTH DATA ELEMENTS--ADDITIONAL MATERIAL CHARACTERISTICS |
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| fixed length control field |
t||||fr|||| 000 0 |
| 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION |
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| fixed length control field |
ta |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
261008t20262026my a|||fr|||| 000 0 eng d |
| 020 ## - INTERNATIONAL STANDARD BOOK NUMBER |
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| International Standard Book Number |
THE0010838 (Local) |
| Qualifying information |
Hardback |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
UMPSA |
| Language of cataloging |
eng |
| Transcribing agency |
UMPSA |
| Description conventions |
rda |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
FTKKP .N83 2026 r Thesis |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Nwaichi Peter Ikechukwu , |
| Relator term |
author. |
| 245 10 - TITLE STATEMENT |
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| Title |
Development of high-purity green sulfonated lignin nanoparticles for enhanced cement hydration control in high-temperature, high-salinity environments / |
| Statement of responsibility, etc. |
Nwaichi Peter Ikechukwu |
| 264 #1 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
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| Place of production, publication, distribution, manufacture |
Kuantan, Pahang : |
| Name of producer, publisher, distributor, manufacturer |
UMPSA, |
| Date of production, publication, distribution, manufacture, or copyright notice |
2026 |
| 264 #4 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE |
|---|
| Date of production, publication, distribution, manufacture, or copyright notice |
© 2026 |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
xxiv, 268 pages : |
| Other physical details |
illustration ; |
| Dimensions |
30 cm.+ |
| Accompanying material |
1 CD-ROM |
| 336 ## - CONTENT TYPE |
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| Source |
rdacontent |
| Content type term |
text |
| 337 ## - MEDIA TYPE |
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| Source |
rdamedia |
| Media type term |
unmediated |
| 338 ## - CARRIER TYPE |
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| Source |
rdacarrier |
| Carrier type term |
volume |
| 347 ## - DIGITAL FILE CHARACTERISTICS |
|---|
| Source |
rda |
| File type |
text file |
| Encoding format |
PDF |
| 500 ## - GENERAL NOTE |
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| General note |
Faculty of Chemical and Process Engineering Technology |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Thesis (Doctor of Philosophy) -- Universiti Malaysia Pahang Al Sultan Abdullah - 2026 |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Include bibliographical reference |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
Retarders prevent hydration and prolong slurry setting time, thereby ensuring sufficient pumpability under deep reservoir conditions. However, most conventional retarders used in the industry exhibit poor performance under high-temperature and high-salinity (HTHS) conditions, leading to excessive viscosity, reduced compressive strength, and shortened setting time that compromise cement integrity and placement efficiency. Therefore, this study aimed to synthesize and optimize a sustainable retarder derived from empty fruit bunch (EFB) biomass capable of maintaining effective performance under extreme oilwell conditions. High-purity lignin nanoparticles (LNPs) were synthesized through sequential acid–alkali hydrolysis, followed by sulfonation to improve solubility, dispersion stability, adsorption capacity, and hydration retardation performance. The synthesized sulfonated lignin nanoparticles (SLNPs) were characterized using field-emission scanning electron microscopy (FESEM), particle size distribution (PSD), gas chromatography–mass spectrometry (GC–MS), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and X-ray diffraction (XRD) to evaluate their morphology, dispersion behavior, chemical composition, functional groups, thermal stability, and crystallinity. Process parameters were optimized using Response Surface Methodology (RSM) integrated with Box–Behnken Design (BBD), while model adequacy and statistical significance were validated through analysis of variance (ANOVA). The optimized formulation obtained through RSM–BBD consisted of a water-to-cement ratio of 0.9, SLNP concentration of 0.6 wt.%, curing temperature of 130 °C, and salinity concentration of 0.6 wt.%, yielding a compressive strength of 59.09 N/mm², setting time of 194.35 min, and desirability index of 1.000. The synthesized SLNPs exhibited a uniform spherical morphology with an average particle size of approximately 24 nm. Rheological evaluation demonstrated that SLNP-modified cement slurries maintained stable shear-thinning and pseudoplastic behavior with improved pumpability and structural stability at temperatures up to 250 °C. The developed rheological models showed excellent agreement with experimental data, with R² values (0.98) approaching unity. SLNPs extended the initial and final setting times to 197 and 319 min, respectively, compared with 183 and 272 min for sodium borate. Mechanical evaluation further showed that SLNP-modified cement achieved compressive strengths of 60.93 N/mm² after 3 days and 68.65 N/mm² after 28 days at 250 °C, outperforming both neat cement and sodium borate systems. Overall, the developed SLNP retarder demonstrates strong potential as a next-generation, eco-friendly cement retarder with excellent thermal stability, salinity resistance, controllable retardation behavior, and superior mechanical performance for sustainable high-performance oilwell cementing applications under extreme reservoir conditions |
| 610 20 - SUBJECT ADDED ENTRY--CORPORATE NAME |
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| Corporate name or jurisdiction name as entry element |
Faculty of Chemical and Process Engineering Technology |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Universities and colleges |
| General subdivision |
Dissertations |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
Theses |
| General subdivision |
Dissertations |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Library of Congress Classification |
| Koha item type |
Thesis |