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Chinese Journal of Polymer Science 2015年第1期33卷 137-152页

作者： Sushanta k Sahoo Smita Mohanty sanjay k nayak Laboratory for Advanced Research in Polymeric Materials (LARPM) Central Institute of Plastics Engineering & Technology (CIPET)B/25 CNI complex Patia Bhubaneswar 751024 Odisha India

A novel bioresin, epoxidized soybean oil was synthesized by in situ method and was characterized employing FTIR and NMR. The bioresin was blended with epoxy（DGEBA） at different ratios as reactive diluents for improved processibility and toughened nature. The composition with 20 wt% bioresin exhibited improved impact strength to the tune of 60% as compared to virgin epoxy. Fracture toughness parameters critical stress intensity factor（kIC） and critical strain energy release rate（GIC） were evaluated using single edge notch bending test and demonstrated superior enhancement in toughness. Dynamic mechanical, thermal, thermo mechanical and fracture morphological analyses have been studied for bio-based epoxy blends. Curing kinetics has been evaluated through DSC analysis to investigate the effect of bioresin on cross-linking reaction of neat epoxy with triethylenetetramine as curing agent.

关键词： Bio-based epoxy Soybean oil Fracture toughness Curing kinetics TMA.

Preparation and Characterization of Electrically and Thermally Conductive Polymeric Nanocomposites

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Journal of Minerals and Materials Characterization and Engineering 2012年第7期11卷 744-756页

作者： Mousam Choudhury Smita Mohanty sanjay k nayak Rakesh Aphale Laboratory for Advanced Research in Polymeric Materials (LARPM) Central Institute of Plastics Engineering & Technology Bhubaneswar-751 024 India

The dielectric properties of composites and nanocomposites composed of epoxy resin as base matrix and AlN (Aluminum Nitride) as micro and nanofiller has been studied at variable loading of AlN. To improve the dispersion of the filler within the polymer matrix, AlN was surface modified with silane coupling agent (SCA). The thermal conductivity behavior of epoxy/AlN composites and nanocomposites has been studied at variable percentage of filler and temperatures. Test result indicated an increase of thermal conductivity of the composites at 20 wt% of AlN. Also, silane treated composites exhibited improved electrical conductivity properties wherein the electrical insulation property decreased in terms of di-electric strength and resistivity.

关键词： Epoxy Micro-AlN Nano-AlN Insulation Electrical Properties Resistivity

Mechanical,Electrical and Thermal Properties of Nylon-66/Flyash Composites:Effect of Flyash

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Organic Polymer Material Research 2022年第2期4卷 7-14页

作者： Shyam D Maurya Manoj k Singh Syed Amanulla S N Yadav sanjay k nayak Central Institute of Petrochemicals Engineering&Technology LucknowUttar Pradesh226008India Central Institute of Petrochemicals Engineering&Technology HajipurBihar844101India Ravenshaw University CuttackOdisha753003India

In the current study,the effect of flyash(FA)on the physic-mechanical,electrical,thermal and morphological behavior of nylon-66(PA)was ***/FA composites were prepared by melt mixing via twin screw ex-truder,with varying weight percent(5 wt%,10 wt%,15 wt%and 20 wt%)of *** results of composites were optimized and compared with vir-gin *** and electrical properties of composites improved up to 10 wt%of FA loading without compromising the *** fly-ash filled nylon-66 composites showed a low abrasive wear *** the heat distortion temperature of composites with an increase in weight percent of flyash while opposing the melt flow *** filler enhances the stiffness of plastics but significantly reduces the impact ***-persion of flyash was examined by impact fracture surface of composites using a scanning electron microscope.

关键词： Nylon-66 Flyash Composites Voids Morphology

Shear Strength and Morphological Study of Polyurethane- OMMT Clay Nanocomposite Adhesive Derived from Vegetable Oil-Based Constituents

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Journal of Renewable Materials 2018年第1期6卷 117-125页

作者： Swarnalata Sahoo Hemjyoti kalita Smita Mohanty sanjay kumar nayak Central Institute of Plastic Engineering and Technology ChennaiTamil Nadu 600032India Laboratory for Advanced Research in Polymeric Materials(LARPM) CIPETBhubaneswar 751024 India and ChennaiTamil Nadu 600032India

In the current work,we have synthesized vegetable oil-based polyurethane-OMMT clay nanocomposite(PUNC)adhesive with the incorporation of different wt%of organically modified nanoclay(1 to 5 wt%)into the biobased polyurethane(PU)matrix through in-situ polymerization process via ultrasonication *** the initial stage,PU adhesive was prepared using polyol and partially biobased aliphatic isocyanate,wherein polyol was derived from the transesterified castor oil using ethylene *** formation of PU and PUNC adhesive was confirmed using Fourier transform infrared(FTIR)spectroscopy *** tensile strength of PU with different wt%of nanoclay was determined and the analysis showed that the loading of 3 wt%of nanoclay within the PU matrix showed better performance as compared to the ***,shear strength of PU and PUNC(3 wt%nanoclay)adhesives were determined using lap shear test,in which PUNC adhesive showed higher adhesive strength at 70°***,the dispersibility of OMMT nanoclay within the PU matrix along with exfoliation and amorphous structure was confirmed through wide angle X-ray diffractometer(WAXD)and transmission electron microscopy(TEM)*** phase separation structure was analyzed using dynamic mechanical analysis(DMA).The analysis revealed that with the addition of organically modified nanoclay in the PU matrix,the glass transition temperature(Tg)of the damping curve was shifted towards higher temperature.

关键词： Biobased raw material composite material green strength gel time DMA

Comparing accuracy of cochlear measurements on magnetic resonance imaging and computed tomography:A step towards radiation-free cochlear implantation

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中华耳科学杂志:英文版 2023年第4期18卷 208-213页

作者： Anurita Swarup Vinusree karakkandy Preetam Chappity Suprava Naik sanjay kumar Behera Pradipta kumar Parida Mohnish Grover Gaurav Gupta Prajna Paramita Giri Saurav Sarkar Pradeep Pradhan Dillip kumar Samal Aswathi kallyadan Veetil Asutosh Adhikari Saurav nayak Department of ENT and HNS All India Institute of Medical Sciences(AIIMS)BhubaneswarOdishaIndia Department of Radiodiagnosis All India Institute of Medical Sciences(AIIMS)BhubaneswarOdishaIndia Department of Community and Family Medicine All India Institute of Medical Sciences(AIIMS)BhubaneswarOdishaIndia Department of Biochemistry All India Institute of Medical Sciences(AIIMS)BhubaneswarOdishaIndia Department of ENT Sawai Man Singh Medical CollegeJaipurRajasthanIndia Department of ENT Sardar Patel Medical CollegeBikanerRajasthanIndia

Objective:Computed Tomography(CT)and Magnetic Resonance Imaging(MRI)are commonly employed in pre-operative evaluation for cochlear implant ***,with a decrease in the age of implantation,even minor radiation exposure can cause detrimental effects on children over their *** current study compares different cochlear measurements from CT and MRI scans and evaluates the feasibility of using only an MRI scan for radiological evaluation before cochlear ***:A longitudinal observational study was conducted on 94 ears/47 children,employing CT and MRI *** CT and MRI scan measurements include,A value,B value,Cochlear duct length(CDL),twoturn cochlear length,alpha and beta angles to look for cochlear *** nerve diameter was measured using *** values were ***:The mean difference between measurements from CT and MRI scans for A value,B value,CDL,and two-turn cochlear length values was 0.567±0.413 mm,0.406±0.368 mm,2.365±1.675 mm,and 2.063±1.477 mm respectively without any significant *** alpha and beta angle measures were comparable,with no statistically significant ***:The study suggests that MRI scans can be the only radiological investigation needed with no radiation risk and reduces the cost of cochlear implant program in the paediatric *** is no significant difference between the measurements obtained from CT and MRI ***,observed discrepancies in cochlear measurements across different populations require regionally or race-specific standardized values to ensure accurate diagnosis and precision in cochlear implant *** aspect must be addressed to ensure positive outcomes for patients.

关键词： Cochlear implant Hearing loss Cochlea anatomy Radiology

Undiagnosed Abdominal Paraganglioma: An Anaesthetic Challenge

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Open Journal of Anesthesiology 2013年第10期3卷 438-440页

作者： Lalit Gupta sanjay kr. Nihalani Saipriya Tiwari Poonam Bhadoria Sonia Wadhawan Department of Anaesthesia & Intensive Care Maulana Azad Medical College & Associated Lok Nayak Hospital New Delhi India

Paragangliomas are tumours which arise in extra adrenal autonomic paraganglia and have the ability to secrete catecholamines. Their anaesthetic management is the same as that of a case of pheochromocytoma, but in an undiagnosed case like our patient, unexpected eventful encounter in the operating theatre may lead to life threatening complications during surgical resection warranting immediate management and thus posing a real challenge to the skill of an anaesthesiologist.

关键词： Abdominal Paraganglioma Ventricular Tachycardia Hypertensive Crisis