Geoenergy Science and Engineering
·
2024
·
IF 0
Jian Wang,Jinsheng Sun,Xianbin Huang,Kaihe Lv,Xiaodong Dong,Yuan Geng,Shuixiang Xie
There is a lack of viscosity enhancers for high-temperature and high-density solid-free completion solutions in high-temperature and high-pressure oil and gas reservoirs. To address the problem of insufficient temperature resistance of biopolymers and poor performance of conventional viscosifiers in high-temperature and high-density solid-free completion fluids, an anti-temperature viscosifiers for high-density solid free completion fluids was synthesized using N,N-dimethylacrylamide(DMAA), diallyldimethylammonium chloride(DMDAAC) and the amphoteric ion [2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium Hydroxide(SBMA) as the main monomers. FPOD has salt-responsive properties. With the increase of brine concentration, the degree of stretching of FPOD molecular chain increased and formed a network structure through intermolecular forces, which provided a viscosity increasing effect on the solution. FPOD has good temperature resistance. The apparent viscosity of 1 wt% FPOD in 1.75 g/cm 3 CaBr 2 brine was 37 mPa·s, and after aging at 150 °C, the viscosity was still 32.5 mPa·s. The performance of FPOD before and after aging is better than other viscosifiers. FPOD is simple to prepare and has good viscosity enhancement effect in high density solid-free brines. Moreover, FPOD is well-compatible with other treatment agents for completion fluids, and the HTHP filtration loss of the completion fluid system with 2 wt% FPOD added at 150 °C is only 5 mL. FPOD could solve the problem of insufficient high temperature resistance and viscosity increasing performance of viscosifiers in high density brine completion fluids, and provide a new technical approach to drilling high-temperature and high-pressure oil and gas reservoirs.
研究领域:
石油工程
·
高分子化学
✓ 已验证
产品关联
DOI
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Ren Wang,Yilin Deng,Jie Yang,Jinsheng Sun,Wenjun Shan,Huaizhi Tao,Jianlong Wang,Luman Liu,Zexing Yang,Han Ren
Conventional drilling fluid viscosity enhancers have poor anti-temperature and anti-salt properties, making it difficult to regulate the rheological properties of drilling fluids in the high-temperature, high-mineralisation environment of deep formations, which is prone to causing downhole accidents such as stuck drills and well-wall instability. In the present study, a salt-responsive amphiphilic hydrophobically attached polymer (PAADS) was synthesised by free-radical micellar polymerisation and used as a viscosity builder for saturated sodium chloride drilling fluids. The molecular structure and thermal stability were characterised by Fourier transform infrared spectroscopy, nuclear magnetic resonance and thermogravimetric analysis . The results reveal that the molecular structure of PAADS is consistent with the expected target and has good thermal stability . The viscosity-increasing performance of PAADS in a saturated sodium chloride drilling fluid was evaluated according to the American Petroleum Institute standard. PAADS can effectively maintain the rheological performance of the drilling fluid under high-temperature and high-salt conditions, and the apparent viscosity retention rate of the saturated sodium chloride drilling fluid containing 2 wt% PAADS can be up to 47.5 % after 180 °C hot rolling. NaCl exhibits significant salt-responsive properties by affecting the hydrodynamic radius of PAADS molecules. In addition, PAADS solutions exhibit excellent shear dilution, viscoelasticity and stable internal space structure. This study provides new ideas for salt-resistant drilling fluid additives, which are of great significance for the efficient development of deep oil and gas resources.
研究领域:
石油工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Lei Huang,Lixun Zhang,Shengwei Xiao,Yin Yang,Feng Chen,Ping Fan,Zhenping Zhao,Mingqiang Zhong,Jintao Yang
Antibacterial surfaces that not only can kill bacteria but also can release the dead bacteria have become one of most promising antibacterial strategies, but the realization of high efficiency, rapid response and long-term reusability of such surfaces remains many challenges. Herein, we reported new antibacterial surfaces with high killing and release capabilities based on a salt-responsive brush recently developed by our group. These surfaces consist of two polymer brushes with two-layer architecture, where the upper-layer bactericidal brushes (poly[(trimethylamino) ethyl methacrylate chloride], polyMETAC or poly[2-(tert-butylamino)ethyl methacrylate], polyTA) were built on background layer of salt-responsive polyzwitterionic brush (poly(3-(dimethyl(4-vinylbenzyl) ammonio) propyl sulfonate), polyDVBAPS) via sequential surface initiated atom transfer radical polymerization . By the combination in this manner, the bacteria attach/release function of polyDVBAPS and bactericidal function of polyMETAC/polyTA were successfully integrated, resulting in the smart surfaces which can reversibly kill and release bacteria in response to the switch between water and salt solution. Both two systems in this study, i.e. poly (DVBAPS-b-METAC) and poly(DVBAPS-b-TA), exhibit high bactericidal activity by killing more than 93% and highly efficient regeneration capability by rapidly releasing ∼90% of the attached bacteria. Specifically, such excellent antibacterial performance of poly(DVBAPS-b-TA) can be well retained even after four killing-release cycles, indicating the great potential in reusable biological materials and devices. Furthermore, the correlation between physicochemical properties of the two-layer brushes with their bactericidal efficiency and regenerative capability was also investigated and discussed.
研究领域:
生物材料学
·
抗菌表面研究
✓ 已验证
产品关联
DOI
高影响因子
Journal of Nanomaterials
·
2015
·
IF 1.644
Na Su,Houbin Li,Yu Huang,Xiongzhi Zhang
A facile preparation of novel salt responsive spherical polymer brushes (SPB) consisting of a carbon spheres core and a shell of sodium polystyrene sulfonate (PSSNa) was described. The SPB were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The radius of carbon spheres and hydrodynamic radius of SPB were ca. 370 nm and 785 nm, respectively. The brushes had of 393600 g/mol with polydispersity / of 1.58. Furthermore, the dependence of PSSNa brushes on ionic strength and pH was investigated.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Jinsheng Sun,Xiaofeng Chang,Kaihe Lv,Jintang Wang,Fan Zhang,Xinyu Zhou,Jianwei Zhao
Salt contamination has become the most critical challenge faced by water-based drilling fluids (WDFs) under extreme salinity and high temperatures, which deteriorates rheology and fluid loss properties, causing drilling accidents such as leakage, formation collapse and borehole instability. Herein, we report a salt-responsive zwitterionic polymer (PAMN) and its novel application as a tackifier in brine drilling fluid exploiting the anti-polyelectrolyte effect, in which the zwitterionic polymer molecular chain has undergone a transformation from a collapsed small spherical shape to an extended chain shape corresponding to the increasing ionic strength of the electrolyte. Compared with the saturated brine drilling fluid, the apparent viscosity and plastic viscosity of the saturated brine drilling fluid dispersed with PAMN increased by 542.9% and 925% respectively owing to the charge interaction on the molecular chain of PAMN was shielded by sodium chloride electrolyte, which resulted in the increase of the radius of gyration (Rg) of the PAMN molecular chain. Additionally, the salt response mechanism of zwitterionic polymer PAMN had been revealed by molecular simulation technology, which simulated the radius of gyration, radial distribution function (RDF), mean square displacement (MSD) and energy of molecular chain in water and salt water, respectively. This work demonstrates that the approach can be extensively generalized to a large class of synthetic zwitterionic polymers and can promote the development of various salt-responsive intelligent drilling fluids.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD ENGINEERING
·
2021
·
IF 5.354
Ying Ji
A novel pH/salt-responsive porous microgel was developed from hydrolyzed oxidized starch for the encapsulation, delivery, and stabilization of anthocyanins . To synthesize this microgel, native corn starch was modified by sequential TEMPO oxidation and glucoamylase hydrolysis, using trisodium phosphate (STMP) as a cross-linker. The morphology, structure, and physical properties of the modified starch samples and microgels were characterized by SEM, ATR-FTIR, and particle size analyses, as well as by zeta-potential measurements. The obtained results indicate that compared to the oxidized microgels, the porous microgels exhibit higher capacity of anthocyanin loading and slower release. A pH of 3 is least favorable for the loading of anthocyanins into the microgels and 22.7% of the encapsulated anthocyanins are released from oxidized microgels, compared to 10.4% released from porous microgels. In addition, the porous microgels enhance the stability of anthocyanins, which facilitates storage. The residual rate of anthocyanins encapsulated in porous microgels is around 31%, whereas that of compounds in oxidized microgels approaches 18% after 30 d of storage.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 6
·950-960
·
IF 4.776
Dong Zhang,Yanhong Fu,Lei Huang,Yanxian Zhang,Baiping Ren,Mingqiang Zhong,Jintao Yang,Jie Zheng
The development of new antimicrobial materials and strategies is of importance for many biomedical and industrial applications. In this work, we report a new strategy to integrate distinct antimicrobial, antifouling, and stimuli-responsive properties into a single hydrogel to realize bacteria resistance, killing, and releasing functions. To achieve this design, we conjugated salt-responsive anti-polyelectrolyte polyDVBAPS (poly(3-(dimethyl(4-vinylbenzyl)ammonio)propyl sulfonate)) with antifouling polyHEAA (poly(N-hydroxyethyl acrylamide)) and antimicrobial AgNPs (silver nanoparticles) to form a hybrid hydrogel of polyDVBAPS-g-polyHEAA@AgNPs, among which polyHEAA functions as a general antifouling background to prevent bacteria adsorption on the surface, AgNPs act as antimicrobial agents to kill bacteria on the surface, and polyDVBAPS uses its unique salt-responsive, anti-polyelectrolyte property to release adherent bacteria from the surface. In this design, polyDVBAPS-g-polyHEAA@AgNPs hydrogels not only effectively resist bacteria attachment and kill the adherent bacteria, but also regenerate the antifouling surface of the hydrogel by releasing the adhered bacteria to keep the surface free from bacteria. The polyDVBAPS-g-polyHEAA@AgNPs hydrogels exhibited high surface resistance to bacteria adsorption (<106 cells per cm2) for up to 4 days, high antibacterial activity by killing ∼99% of attached bacteria of both E. coli and S. aureus, and surface regeneration ability by releasing >96% of adherent live or dead bacteria from the surface upon a simple treatment of 1.0 M NaCl solution for 10 min. Upon the release of AgNPs, AgNPs were reloaded into the hydrogel again to achieve multiple antifouling, bactericidal, and regenerative properties. This work demonstrates a new design for a new multifunctional hydrogel to effectively achieve antimicrobial, antifouling, and surface regeneration properties, making this hydrogel very promising for antimicrobial applications.
研究领域:
生物材料学
·
微生物学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Jingfeng Yuan,Dong Zhang,Xiaomin He,Yifeng Ni,Lingbin Che,Jiang Wu,Baoyi Wu,Yang Wang,Shuguang Wang,Dongyong Sha,Si Yu Zheng,Jintao Yang
Development of biological dressings has received widespread attentions due to their good breathability, biocompatibility, wettability, and the ability to absorb wound exudate without sticking to the wound. However, current proposed antibacterial hydrogels are limited antibacterial ability, short service life and insufficient biocompatibility, which are still challenging to address intricate practical applications. Here we develop a cationic peptide-based, salt-responsive hydrogel dressing with triple functions of antifouling, bactericidal, and bacterial release by combining ε-poly- l -lysine, poly(ethylene gly co l) diglycidyl ether, and poly(DVBAPS- co -GMA) via a one-pot method. These designed hydrogels enabled to further quaternize to enhance antibacterial property due to the presence of amine residues. The resultant hydrogels present good antibacterial activity (>90%), biocompatibility, cell proliferation efficacy (~400%) and adhesiveness. Through in vivo and in vitro antibacterial capability tests, it is also found that hydrogels have good antifouling and sterilization capabilities, and the sterilization rate could reach up to ~96%. In addition, ~94% of the attached bacterial can be released after saline/water switching for several cycles. Taken together, the designed multiple antibacterial dressing prolongs the lifespan relying on reversible salt-responsive release and meet special requirements for wound healing. This work not only provides a platform to highlight its promising potentials in wound management but also gives a custom strategy to biomedical applications.
研究领域:
生物材料学
·
医学
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2013
·Vol. 5
·期 1
·175-185
·
IF 5.231
Qijing Chen,Yuanyuan Xu,Xueteng Cao,Lianjie Qin,Zesheng An
A series of five core cross-linked star (CCS) polymers has been synthesized by RAFT-mediated heterogeneous polymerization in aqueous media. These CCS polymers consist of poly(MEAx-co-PEGAy) (MEA is 2-methoxyethyl acrylate and PEGA is poly(ethylene glycol) acrylate) of different compositions. They exhibit responsiveness to both temperature and salt. Addition of kosmotropes reduces the cloud point, and addition of chaotropes raises the cloud point. These CCS polymers can stabilize dodecane-in-water high internal phase emulsions (HIPEs) in the absence or presence of salts. Addition of salts has negligible effect on the maximum oil fraction, the size of oil droplets or the stability of the HIPEs. HIPEs with large oil fractions (up to 92 vol%) at low concentrations of CCS polymers (≤1 wt%) can be routinely obtained. When the oil volume fraction is larger than 74 vol%, gelled HIPEs are formed with long-term stabilities (more than three months). The temperature and salt responsiveness of the CCS polymers is transferred to the CCS-stabilized HIPEs. Addition of kosmotropes can enhance demulsification efficiency, while addition of chaotropes can decrease demulsification efficiency or enhance the thermal stability of the CCS-stabilized HIPEs. The emulsification–demulsification cycle can be successfully repeated four times. The facile and aqueous synthesis of CCS polymers and the fast response of the CCS-stabilized HIPEs will open up new opportunities for the preparation and exploitation of a range of smart soft materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xiaoyu Wang,Dong Zhang,Jiahui Wu,Iryna Protsak,Shihua Mao,Chunxin Ma,Meng Ma,Mingqiang Zhong,Jun Tan,Jintao Yang
Continuously growing interest in the controlled and tunable transport or separation of target molecules has attracted more attention recently. However, traditional “on–off” stimuli-responsive membranes are limited to nongradient feedback, which manifests as filtration efficiency that cannot be increased or decreased gradually along with the different stimuli conditions; indeed, only the transformation of on/off state is visible. Herein, we design and fabricate a series of robust salt-responsive SiO2@cellulose membranes (SRMs) by simply combining salt-responsive poly[3-(dimethyl(4-vinylbenzyl)ammonium)propyl sulfonate] (polyDVBAPS)-modified SiO2 nanoparticles and cellulose membranes under negative-pressure filtering. The antipolyelectrolyte effect induces stretch/shrinkage of polyDVBAPS chains inside the channels and facilities the directional aperture size and surface wettability variation, greatly enhancing the variability of interfacial transport and separation efficiency. Due to the linear salt-responsive feedback mechanism, the optimal SRMs achieve highly efficient target macromolecule separation (>75%) and rapid oil/saline separation (>97%) with a continuous gradient and adjustable permeability, instead of simply an “on–off” switch. The salt-responsive factors (SiO2-polyDVBAPS) could be reversibly separated or self-assembled to membrane substrates; thus, SRMs achieved unprecedented repeatability and reusability even after long-term cyclic testing, which exceeds those of currently reported membranes. Such SRMs possess simultaneously a superfast responsive time, a controllable gradient permeability, a high gating ratio, and an excellent reusability, making our strategy a potentially exciting approach for efficient osmotic transportation and target molecule separation in a more controllable manner.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Jinsheng Sun,Xiaofeng Chang,Kaihe Lv,Jintang Wang,Fan Zhang,Jiafeng Jin,Xinyu Zhou,Zhiwen Dai
The sustainable development of global energy necessitates high-performance water-based drilling fluid (WDFs) with low toxicity and sustainability, especially in high salinity reservoir excavation. Herein, we report an environmentally friendly and salt-responsive zwitterionic polymer brush based on enzymatic lignin nanoparticles (EHL) prepared by intramolecular self-assembly as a fluid-loss additive (EHL-ASN) for WDFs by the anti-polyelectrolyte effect to overcome the issues of wellbore instability and collapse caused by the deterioration of rheological and filtration properties of WDFs due to electrolyte invasion in drilling high salinity reservoirs and reveal the salt response mechanism of EHL-ASN. The ascending viscosity of EHL-ASN solution corresponded to the heightening of electrolyte salinity, which revealed that EHL-ASN solution had obvious salt response. The biological toxicity evaluation of EHL-ASN exhibited that its half maximal effective concentration (EC 50 ) was 51,900 mg/L, which accorded with the direct emission standard. Additionally, the results for rheological and fluid-loss performance evaluation of EHL-ASN/WDFs promulgated that EHL-ASN had significant effects on heightening viscosity and debasing fluid-loss, in which, EHL-ASN could significantly debase the fluid-loss (FL API ) of saturated salt-based mud (SSBM) from 194 mL to 4 mL, with a decline rate of 97.9%. This work not only provides a novel approach for high value utilization of lignin, but also paves the way for the development of environmentally friendly intelligent WDFs.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yi-Fang Mi,Wen Xia,Bing-Xin Gu,Rong Ma,Yan-Li Ji
To simultaneously improve the water permeability, selectivity, and antifouling properties of polyamide nanofiltration (NF) membranes in textile wastewater treatment , we fabricated a salt-responsive thin-film nanocomposite (TFN) membrane with the incorporation of zwitterionic polymeric nanoparticles (ZNPs) into polyamide selective layer. Herein, the ZNPs were synthesized via an inverse miniemulsion polymerization with zwitterionic monomer , amino monomer, and cross-linker reagent. The salt-responsive property of ZNPs rendered their resultant membranes TFN-ZNPs with adjustable microstructure and separation performance via varying the sodium chloride (NaCl) concentration in water. The water permeance of TFN-ZNPs was enhanced to be 1.7 times that of its pure water permeance with the 10 g L −1 NaCl solution, and the salt-responsive behavior was reversible. Moreover, this salt-responsive property endowed the membrane with outstanding separation performance for the salt/dye or dye/dye mixtures. The selectivity of TFN-ZNPs to NaCl/congo red and methyl orange/neutral blue was enhanced to ∼104 and ∼127, respectively. The TFN-ZNPs with salt-responsive property also exhibited an improved antifouling performance, i.e., the flux recovery ratio was enhanced from 85.6 % to 96.5 % by washing with NaCl solution instead of deionized water . Thus, this work provided a paradigm shift in the fabrication of salt-responsive TFN membranes for the highly efficient separation of organic molecules and inorganic salts and wastewater treatment .
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）