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| 1 | Preparation and Performance of Salt Tolerance and Thermal Stability Cellulose Nanofibril Hydrogels and Their Application in Drilling Engineering显示文摘The poor salt tolerance,thermal stability,and environmental performance of petrochemicals can severely limit their applications in drilling engineering.In this study,cellulose nanofibril(CNF)hydrogels with improved salt tolerance and thermal stability were prepared,and their filtration performance was evaluated.The hydrogels were prepared through the simultaneous grafting of 2-acrylamido-2-methylpropane sulfonic acid(AMPS)and butyl acrylate(BA)onto the CNF surface through ceric ammoniumnitrate-induced radical polymerization.The modified and original CNF samples were characterized using Fourier Transform infrared spectroscopy(FT-IR)and rheological measurements.The FT-IR analysis results showed that both AMPS and BA were grafted onto the CNF backbone,affirming the successful preparation of the grafted CNFs.The rheological analysis results showed that the modified CNF hydrogels exhibited significantly improved salt tolerance,thermal stability,and“salt-thickening”effect.Moreover,the results of the fluid loss test showed that the modified CNF hydrogels exhibited a much better fluid loss control than the original CNF hydrogels.In addition,after adding 2%modified CNF hydrogels as a filtrate reducer in the drilling fluids prepared with a 6%combined salt solution,the filtrate loss was significantly reduced even after aging for 72 h at 160℃. | XiongLi Liu An Wang ChunPing Wang JiaLei Qu YangBing Wen Bin Chen ZhongGuang Wang BinBin Wu ZhaoYang Yuan Bing Wei | 2019 | Paper And Biomaterials2019，4，2： | 7 |
| 2 | Application of Cellulose and Cellulose Nanofibers in Oil Exploration显示文摘In this article, the application of cellulose and cellulose nanofibers in oil exploration was discussed, and the research status of using cellulose and cellulose nanofibers as oil displacement agents, oil-well cementing additives, and foam stabilizers were summarized. | Xiongli Liu Chunping Wang An Wang Jialei Qu Yangbing Wen Bing Wei | 2019 | Paper And Biomaterials2019，4，3： | 2 |
| 3 | The electron-beam (EB) irradiation and grafting of acrylic monomers onto EPDM copolymer显示文摘Radiation techniques (electron-beam, γ-ray, ete.) are usually used f or improving the compatibility between polymer and ingredients in composite materials. Electron-beam pre-irradiation has been used for the first time to enhance the flame retardance of EVA copolymer. Efforts are being made to decline the flammability for EPDM copolymer by EB technique and remarkable reduction has been attained through a series of treatments: pre-irradiation, grafting and saponification. | ZHANG Sheng WANG Jianqi DING Yangbing WU Shaoli XIE Liqing Wen Chenlin | 2000 | Chinese Science Bulletin2000，45，4： | 1 |
| 4 | Stabilizing Pickering Emulsions Using Octenyl Succinic Anhydride Modified with Cellulose Nanofibrils显示文摘In this study,(2,2,6,6-tetramethylpiperidin-1-yl)oxyl-mediated(TEMPO-mediated)oxidized cellulose nanofibrils(TOCNFs)modified with octenyl succinic anhydride(OSA)to improve their hydrophobicity and emulsification performance were investigated.OSA loadings of 9.87-14.81 mmol/g(base on oven-dry weight of TOCNFs)were explored during modification,and the obtained OSA-modified TOCNFs(TOCNF-OSA)were characterized using Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,X-ray diffraction,and thermogravimetric analysis.Additionally,the emulsification performance of TOCNF-OSA was also investigated in the preparation of the Pickering emulsion.The results demonstrated that the molecular chain of OSA was successfully grafted onto the backbone of TOCNFs during modification.With an increase in OSA loading,the content of the carboxyl group of the modified TOCNF-OSA increased significantly while the Zeta potential decreased.Moreover,a degree of substitution of 0.95 could be achieved at an OSA loading of 14.81 mmol/g.During the preparation of Pickering emulsions,compared with original TOCNFs,the modified TOCNF-OSA significantly improved the stability and dispersibility of the Pickering emulsion.This study demonstrated a promising approach for the modification of the Pickering emulsion to produce an eco-friendly emulsifier with superior performance for use in the food industry. | Jialei Qu Langman Luo Weifeng Zhang Shao Geng Chunping Wang An Wang Yangbing Wen | 2022 | Paper And Biomaterials2022，7，3： | 0 |
| 5 | Improving the colloidal stability of Cellulose nano-crystals by surface chemical grafting with polyacrylic acid显示文摘Cellulose nano-crystals(CNC)can be tailored for various value-added applications.However,its use in aqueous systems is hampered by its limited dispersability,especially at a high CNC concentration.In this study,the improvement of CNC colloidal stability by surface chemical grafting with polyacrylic acid(PAA)was investigated,and the zeta potential and the charge density of the chemically modified CNC were analyzed.The results showed that an acrylic dosage of 1%(based on the dry weight of CNC)was sufficient to significantly enhance the colloidal stability.CNC,after chemical grafting with PAA,showed better stability against the increase in storage time or solid content of the aqueous medium,compared with the un-modified CNC. | Dong Cheng Yangbing Wen Xingye An Xuhai Zhu Xiaojuan Cheng Linqiang Zheng Joseph E Nasrallah | 2016 | Journal of Bioresources and Bioproducts2016，1，3： | 0 |
| 6 | Improving the physical properties of nano-cellulose through chemical grafting for potential use in enhancing oil recovery显示文摘The performance of nano-cellulose fluid as a'green'flooding agent in enhancing oil recovery was evaluated in our previous study.Expanding upon our prior findings,in this study the physical properties of nano-cellulose were further improved through chemical grafting with 2-acrylamido-2-methylpropane sulfonic acid monomer(AMPS)and alkyl chain.Scanning electron microscopy(SEM)observation indicated that the morphology of the nano-cellulose maintained fibrillar and was not altered after the chemical modification.The thermal stability of the AMPS and alkyl chain grafted nano-cellulose was investigated through thermogravimetric analysis(TGA).A similar thermal response behavior was observed for the three evaluated samples.Compared to the non-grafted nano-cellulose,the grafted nano-cellulose remained homogenous in an electrolyte solution against storage time,suggesting a superior sanity-tolerance.Rheological analysis also proved the advanced viscoelastic properties of the nano-cellulose dispersion. | Qinzhi Li Bing Wei Yan Xue Yangbing Wen Jing Li | 2016 | Journal of Bioresources and Bioproducts2016，1，4： | 0 |
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