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silicone oil-based solar-thermal fluids dispersed with PDMS-modified Fe3O4@graphene hybrid nanoparticles

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Progress in Natural Science:Materials International 2018年第5期28卷 554-562页

作者： Peng Tao Lei Shu Jingyi Zhang Chiahsun Lee Qinxian Ye Huaixin Guo Tao Deng State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Science and Technology on Monolithic Integrated Circuits and Modules Laboratory

One of the most challenging problems that limit the practical application of carbon-based photothermal nanofluids is their poor dispersion stability and tendency to form aggregation. Herein, by using Fe3O4@graphene hybrid nanoparticles as a model system, we proposed a new method to prepare stably dispersed silicone oilbased solar-thermal nanofluids that can operate at high temperatures than water-based fluids. The introduction of Fe3O4nanoparticles between graphene nanosheets not only physically increases the inter-plane distance of the graphene nanosheet but also provides numerous anchoring points for surface modification. Phosphate-terminated polydimethylsiloxane chains, which have high compatibility with the silicone oil base fluids and hightemperature stability, were synthesized and utilized to modify the Fe3O4nanoparticle surfaces. The attached chains create steric hindrance and effectively screen the strong inter-plane van der Waals attraction between graphene sheets. Dispersion stability of the nanofluids with different concentrations of surface-modified hybrid nanoparticles and heated under different temperatures was investigated. We have demonstrated that such fluids could maintain stable dispersion under a heating temperature up to 150 °C depending on the concentration of the hybrid nanoparticles. The resultant nanofluids maintained stable dispersion after repeated heating and were employed for consistent direct solar-thermal energy harvesting at 100 °C.

关键词： silicone oil Graphene Nanofluid Dispersion Solar-thermal energy

Tailoring morphology and bulk density of magnesium ethoxide particles by adding n-hexane and silicone oil

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Particuology 2020年第6期18卷 168-174页

作者： Zhou Lan Yangcheng Lu State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

In this work,we used the in ert substances silic one oil a nd n-hexane to modulate the solve nt environ ment,and in so doing tailor the preparation of magnesium ethoxide(Mg(0Et)2)*** found the following:(1)non polar n-hexane mainly modulates the polarity of the solvent to control the precipitation rate and size of the Mg(OEt)2 seeds,thereby triggering accelerated nucleation to form small primary particles;and(2)silicone oil(relatively high polarity and viscosity)facilitates the growth and agglomeration stage,to improve inter-particle dispersion and obtain relatively uniform Mg(OEt)2 *** summarized these findings in a comm on mechanism for preparing Mg(OEt)2 particles with uniform morphology,small size,and high bulk density as per the synergistic effect of n-hexane and silicone *** ratios of silicone oil end n-hexane are flexible,and afford various regular and well-dispersed Mg(OEt)2 particles that are 5-30μm in size and 0.2-0.7 g/cm^3 in bulk *** nanoparticles thus have the potential to serve in diverse applications such as catalysis.

关键词： Magnesium ethoxide silicone oil n-Hexane Synergic effect

Destabilising persistent coal froth using silicone oil

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International Journal of Mining Science and Technology 2021年第6期31卷 1023-1031页

作者： Shiqi Liu Xumeng Chen Yongjun Peng School of Chemical Engineering The University of QueenslandBrisbaneQLD 4072Australia

Persistent froth is becoming more and more common in coal and mineral flotation plants and presents safety and operational *** effective method has been developed to destabilise persistent *** a new initiative,this study examined the structural difference between persistent foam and coal froth,based on which a solution was developed to maximumly destabilise coal *** test,oscillatory rheology measurement and scanning electron microscopy(SEM) analysis indicated that the coal froth was more stable than the foam due to the formation of thin capillaries and tightly arranged coal particles on bubble *** 107 μm silicone oil droplet could completely destabilise the foam at 2 mmol/L concentration,it only destabilised less than 50% coal froth even at 6 mmol/L *** maximumly destabilise the coal froth formed by-38 and-20 μm particles,24 and 18 μm silicone oil droplets were required to pass through the thin capillaries and enter the bubble films,***,smaller silicone oil droplets could not bridge the bubble films to destabilise coal froth and therefore a critical droplet size occurred depending on the size of particles stabilising the froth.

关键词： Persistent froth Destabilisation silicone oil Droplet size Oscillatory rheology

Photoluminescence of silicone oil treated by fluorocarbon plasma

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Chinese Physics B 2012年第9期21卷 500-504页

作者：陈天叶超袁颖邓艳红葛水兵徐轶君宁兆元潘小平王振明 School of Physics Science and TechnologyJiangsu Key Laboratory of Thin FilmsSoochow University Joint Research Laboratory of Jiemei Biomedical Engineering Instrument Soochow University

We investigated photoluminescence characteristics of silicone oils treated by C2F6 and CHF3 plasma. The silicone oil treated by the C2F6 plasma emitted a white light mainly composed of 415 nm, 469 nm, and 554 nm emissions, while that treated by the CHF3 plasma emitted a pink light （415 nm）. Fourier transformed infrared spectroscopy and Raman spectroscopy studies showed that the photoluminescence was correlated with the Si-C bond, the carbon-related defects and the oxygen vacancies. It was suggested that the light emitting at 554 nm was related to the Si-C bond and the carbon-related defects, while the pink emission at 415 nm was related to the oxygen vacancies.

关键词： photoluminescence fluorocarbon plasma silicone oil

Predictive factors of epiretinal membrane in complicated rhegmatogenous retinal detachment tamponaded with silicone oil

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International Journal of Ophthalmology(English edition) 2023年第7期16卷 1110-1116页

作者： Yuan-Jie Qian Wu Xiang Yi-Meng Sun Alfira Mijit Zhi-Hao Jiang Yan-Tao Wei State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangdong Provincial Clinical Research Center for Ocular DiseasesGuangzhou 510060Guangdong ProvinceChina

AIM:To determine the incidence and predictive factors for epiretinal membrane(ERM)formation in eyes with complicated primary rhegmatogenous retinal detachment(RRD)tamponaded with silicone oil(SO).METHODS:This retrospective case-control study included 141 consecutive patients with(51 eyes)and without(90 eyes)ERM formation after primary pars plana vitrectomy(PPV)and SO tamponade for complicated *** risk factors for ERM were assessed using logistic regression ***:The prevalence of postoperative ERM was 36.2%(51/141).Multivariate logistic regression analysis showed that the risk factors for ERM in SO-tamponaded eyes included preoperative proliferative vitreoretinopathy[PVR;odds ratio(OR),2.578;95%confidence interval(CI)1.580–4.205,P<0.001],preoperative choroidal detachment(OR,4.454;95%CI 1.369–14.498,P=0.013),and photocoagulation energy(OR,2.700;95%CI 1.047–6.962,P=0.040).The duration of the preoperative symptoms,intraocular SO tamponade time,giant retinal tear,preoperative vitreous hemorrhage,preoperative bestcorrected visual acuity,number of breaks,quadrants of RRD,axial length,and photocoagulation points were not predictive factors for ERM ***:Preoperative PVR,choroidal detachment,and photocoagulation energy are risk factors of ERM formation after complicated RRD *** ophthalmic care as well as patient education are necessary for such patients with risk factors.

关键词： epiretinal membrane rhegmatogenous retinal detachment silicone oil proliferative vitreoretinopathy

Accuracy of segmented measurement of axial length in ultra-high myopia filled with silicone oil using immersion B-scan ultrasonography

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International Journal of Ophthalmology(English edition) 2022年第5期15卷 793-799页

作者： Qing-Hua Yang Hong-Tao Zhang Xiao-Qi Li Bing Chen Zhao-Hui Li Yi-Fei Huang Xin Jin Ying Zhang Li-Qiang Wang Senior Department of Ophthalmology the Third Medical Center of PLA General HospitalBeijingChina

AIM:To evaluate the accuracy of segmented measurement of axial length(AL)in high myopia filled with silicone oil by immersion B-scan ultrasonography(immersion B-scan).METHODS:From June 2016 to June 2020,a total of 67 ultra-high myopia inpatients(67 eyes)who underwent silicone oil removal combined with cataract extraction and intraocular lens(IOL)implantation were retrospectively *** preoperative axial length(AL)of 31 patients with severe cataract were segmented measured using immersion B-scan(B-scan group)and another 36 patients with mild or moderate cataract were measured using IOLMaster 500(IOLMaster group).The post-operative ALs in two groups were both measured using IOLMaster *** IOL power was calculated with Haigis *** differences in ALs between pre-and post-surgery,as well as the postoperative refractive spherical equivalent,absolute refractive error,the prediction deviation of postoperative refraction and best corrected visual acuity(BCVA)were ***:The pre-and post-operative ALs were 30.46±1.63 mm(range 28.09-33.51 mm)and 30.42±1.70 mm(range 28.03-33.90 mm)in B-scan group(t=0.644,P=0.542)and 30.51±1.21 mm(range 28.03-33.90 mm)and 30.43±1.27 mm(range 28.54-33.50 mm)in IOLMaster group(t=1.843,P=0.074),*** months after surgery,BCVA were 0.45±0.13(range 0.3-0.9)and 0.44±0.20(range 0.2-1.0)in B-scan and IOLMaster group respectively(t=0.086,P=0.932).There was no significant difference of the postoperative spherical equivalent(-3.11±0.65 D vs-3.21±0.51 D,t=0.671,P=0.505)and the absolute refractive error(0.589±0.340 vs 0.470±0.245 D,t=1.615,P=0.112)between two *** B-scan group,absolute refractive error within±0.50 D was found in 18 eyes(58.1%),within±1.00 D in 26 eyes(83.9%),and within±1.50 D in 31 eyes(100%).In IOLMaster group,absolute refractive error within±0.50 D was found in 23 eyes(63.9%),within±1.00 D in 34 eyes(94.4%),and within±1.50 D in 36 eyes(Z=0.757,P=0.449).CONCLUSION:The segmented measurement of ALs

关键词： high myopia axial length immersion B-ultrasound IOLMaster silicone oil cataract

Surgical management of silicone oil migrated into suprachoroidal space after vitrectomy

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International Journal of Ophthalmology(English edition) 2011年第4期4卷 458-460页

作者： Zong-Duan Zhang Li-Jun Shen Bin Zheng and Jia Qu Eye Hospital of Wenzhou Medical College Wenzhou 325027 Zhejiang Province China.

AIM: To report a successful surgical management of silicone oil migrated into suprachoroidal space after the repair of the retinal detachment with hemorrhagic choroidal detachment. METHODS: Retrospective observational case report. A 30-year-old man with retinal detachment and hemorrhagic choroidal detachment due to severe corneal penetrating injury, underwent a pars plana lensectomy and vitrectomy, endolaser, and silicone oil tamponade followed by transscleral suprachoroidal hemorrhage drainage in the right eye. One week later, a localised temporal choroid elevation was noted. This persistent elevation was confirmed by operation research to be silicone oil migration into suprachoroidal space. RESULTS: The migrated silicone oil was drained via trans-scleral cut down, and the intravitreal silicone oil was removed and replaced by 16% C2F6. Over the next 2 weeks, the elevation vanished and the choroid became completely flat. CONCLUSION: The migration of silicone oil into suprachoroidal space is a rare complication of vitrectomy. The pathway of the migration is most likely through internal orifice of sclerotonny sites. Trans-scleral drainage surgery is an effective method to remove the migrated silicone oil from suprachoroidal space.

关键词： silicone oil migration suprachoroidal space surgical management

A decrease in macular microvascular perfusion after retinal detachment repair with silicone oil

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International Journal of Ophthalmology(English edition) 2021年第6期14卷 875-880页

作者： Wei Fang Jing Zhai Jian-Bo Mao Hai-Dong Li Zhen-Bin Qian Chao-Qiao Chen Jia-Hao Xu Li-Jun Shen Yi-Qi Chen The Eye Hospital of Wenzhou Medical University School of Opthalmology&OptometryWMUZhejiang Eye HospitalHangzhou 310000Zhejiang ProvinceChina

AIM:To observe whether silicone oil(SO)tamponade could decrease macular perfusion after retinal detachment ***:A prospective observational case-control *** diagnosed with primary macular off rhegmatogenous retinal detachment undergoing successful retinal repair surgery with vitrectomy were strictly *** coherence tomography angiography findings were compared between SO and air tamponade *** postoperative visiting points were set(1 and 3 mo).RESULTS:Totally 29 patients(29 eyes)were *** cases had SO tamponade while 9 cases were with air *** the first visiting point,superficial parafoveal vessel density(PFSVD)significantly decreased in the SO group(P=0.0403),especially in the superior quadrant or superior-hemi area(P=0.0089,0.0426,respectively).Parafoveal deep vessel density(PFDVD)had no difference between the two *** the second visiting point,all quadrants of PFSVD reduced significantly in the SO group(P=0.0256,0.0001,0.0031,<0.0001 in temporal,superior,nasal,and inferior area,respectively),but PFDVD remained no *** the air group,all areas of PFSVD showed significantly improving from the first visit to the second one(P=0.0324,0.0001,0.0371,0.0026,in temporal,superior,nasal,and inferior area,respectively);however,almost all quadrants of PFDVD showed no changes during this *** the SO group,both PFSVD and PFDVD showed no obvious changes between the two visiting ***,parafoveal full retinal thickness in the SO group reduced significantly at both visiting points over the air tamponade,while the foveal avascular zone area showed no difference in the two ***:After retinal detachment surgery with vitrectomy and SO tamponade,superficial macular perfusion and full retinal thickness could decrease obviously when compared to air *** reduction process could persist throughout the tamponade period.

关键词： macular perfusion vessel density silicone oil optical coherence tomography angiography retinal detachment

Long-term follow-up of cataract surgery in eyes filled with silicone oil

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International Journal of Ophthalmology(English edition) 2021年第1期14卷 72-75页

作者： Piotr Kanclerz Christoph Leisser Andrzej Grzybowski Pawel Lipowski Hygeia Clinic Gdańsk 80-286Poland VIROS-Vienna Institute for Research in Ocular Surgery a Karl Landsteiner InstituteVienna 1140Austria Hanusch Hospital Vienna 1140Austria Department of Ophthalmology University of Warmia and MazuryOlsztyn 10-082Poland Institute for Research in Ophthalmology Foundation for Ophthalmology DevelopmentPoznan 60-554Poland Department of Ophthalmology Medical University of GdańskGdańsk 80-952Poland

AIM:To evaluate the refractive and long-term outcome of eyes filled with silicone oil(SO)undergoing phacoemulsification cataract surgery(PCS).METHODS:This retrospective study evaluated patients with SO tamponade who were scheduled for ***:Subjects(n=26)were followed for 29.5±13.9 mo after cataract *** median spherical equivalent refraction(SER)was+5.3 D[interquartile range(IQR)+2.9 to+6.7]before PCS,and+3.4 D(IQR+2.0 to+4.4)after *** the follow-up period retinal reattachment after SO removal was achieved in 15 out of 26 eyes(57.7%).In 13 eyes assessment of refraction after SO-removal was possible,and showed a myopic shift of-4.6 D(IQR-2.9 to-7.3)in the *** SO removal,5 of the 13 eyes(38.5%)were within±1.0 D of the target refraction,while 9 out of the 13 eyes(69.2%)were within±2.0 ***:In our study,the refraction after PCS for eyes filled with SO manifested low predictability,as did the myopic shift following SO removal.A significant percentage of the eyes that underwent SO administration required a long-term tamponade.

关键词： biometry cataract surgery intraocular lens outcomes phacoemulsification refraction silicone oil