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Fabrication and evaluation of carboxymethyl guar gum-chitosan interpenetrating polymer network (IPN) nanoparticles for controlled drug delivery

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Medicine in Novel Technology and Devices 2024年第2期22卷 73-79页

作者： Chandrani Roy Arijit Gandhi Sreejan Manna Sougata Jana Department of Pharmaceutics Gupta College of Technological SciencesAshram MoreG.T.RoadAsansol713301West BengalIndia Department of Pharmaceutical Technology Brainware UniversityBarasatKolkataWest Bengal700125India Department of Health and Family Welfare Directorate of Health ServicesKolkataIndia

Guar gum(GG)has drawn more interest from researchers in the last several decades for the controlled delivery of *** aim of the research is to fabricate and evaluate an interpenetrating polymer network(IPN)based nanocarriers system employing chemically modified GG to achieve controlled release of *** present study,we have reported the synthesis of carboxymethyl GG-chitosan IPN nanoparticles for controlled release of metformin *** guar gum(CMGG)was synthesized and employed for developing IPN nanoparticles in combination with chitosan in varying polymeric ratios.A cross-linking agent,sodium tripolyphosphate(Na-TPP)was used for the synthesis of IPN colloidal suspension of nanoparticles which was lyophilized to obtain *** carboxymethylation of GG was confirmed through Fourier transform infra-red spec*** mean particle size was 440.6 nm indicating a polydispersity index of *** drug entrapment efficiency was found to vary between 67.461.64%to 88.232.02%.The differential scanning calorimetry study revealed the presence of amorphous metformin hydrochloride as a homogenous dispersion in nanoparticles(NPs)*** vitro drug release study indicated controlled release ability of developed IPN matrix.A2 formulation(chitosan:CMGG-1:1)exhibited 78.110.27%release after 8 *** evaluation performed in alloxan-treated diabetic rat model exhibited a prolonged hypoglycemic efficacy over 6 h,for A2 formulation treated group,compared to the group receiving only metformin HCl,which demonstrated a reduction in blood glucose levels for up to 4 *** study findings demonstrated the efficacy of the CMGG-chitosan based IPN nanoparticulate system for sustained delivery of therapeutic agents.

关键词： Carboxymethyl guar gum Chitosan interpenetrating polymer network Nanoparticles Controlled release Metformin hydrochloride

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High Water Resistance and Enhanced Mechanical Properties of Bio-Based Waterborne Polyurethane Enabled by in-situ Construction of interpenetrating polymer network

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Journal of Renewable Materials 2023年第3期11卷 1209-1222页

作者： Henghui Deng Jingyi Lu Dunsheng Liang Xiaomin Wang Tongyao Wang Weihao Zhang Jing Wang Chaoqun Zhang Key Laboratory for Biobased Materials and Energy of Ministry of Education College of Materials and EnergySouth China Agricultural UniversityGuangzhou510642China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou510642China Guangdong Provincial Key Laboratory of Silviculture Protection and UtilizationGuangdong Academy of ForestryGuangzhou510520China

In this study,acrylic acid was used as a neutralizer to prepare bio-based WPU with an interpenetrating polymer network structure by thermally induced free radical emulsion *** effects of the content of acrylic acid on the properties of the resulting waterborne polyurethane-poly(acrylic acid)(WPU-PAA)dispersion and the films were systematically *** results showed that the cross-linking density of the interpenetrating network polymers was increased and the interlocking structure of the soft and hard phase dislocations in the molecular segments of the double networks was tailored with increasing the content of acrylic acid,leading to enhancement of the mechanical properties and water resistance of WPU-PAA ***,with the increase in content of acrylic acid,the tensile strength,Young’s modulus,and toughness of the WPU-PAA-110 film increased by 3 times,and 8 times,and 2.4 times compared with WPU-PAA-80,*** WPU-PAA-100 film showed the best water resistance,and the water absorption rate at 96 h was only 3.27%.This work provided a new design scheme for constructing bio-based WPU materials with excellent properties.

关键词： Bio-based waterborne polyurethane interpenetrating polymer network highly water resistance superior mechanical performance

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In Situ Variation of interpenetrating polymer network Topology using a Photolabile Connector

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Chinese Journal of polymer Science 2022年第11期40卷 1317-1322页

作者： Xin-Hong Xiong Lu-Lu Xue Sheng Wang Shi-Fang Zhao Xiang Guo Mei Li Jia-Xi Cui Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou313001China Department of Bioengineering University of PennsylvaniaPhiladelphiaPennsylvania19104USA College of Chemistry and Molecular Engineering Peking UniversityBeijing100871China School of medicine Shaoxing UniversityShaoxing312000China School of Materials Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan250353China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu610054China

A photo-controlled approach is developed to regulate the interpenetrating polymer network(IPN)topology by varying the connecting structure between the first and second *** approach is based on multifunctional inimer(Vinyl-o NB-Br)possessing three moieties,i.e.,an acrylate-based double bond for incorporation within a polymer network,a Br group for grafting polymerization to get connectIPN(c-IPN),and an o-nitrobenzyl spacer for photocleaving to convert the c-IPN to disconnected-IPN(d-IPN)with UV light *** design allows for finely controlling the connection degree between two networks.A systematic study on the mechanical property of a series of samples with different connection degrees thus can be *** results reveal that decreasing the connecting degree between two networks of IPN made a negligible contribution to materials'mechanical properties.

关键词： interpenetrating polymer network network topology o-Nitrobenzyl Inimer Mechanical property

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Porous carbon globules with moss-like surfaces from semi-biomass interpenetrating polymer network for efficient charge storage

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Chinese Chemical Letters 2021年第12期32卷 3811-3816页

作者： Guchuan Ping Ling Miao Abuduheiremu Awati Xiaoyu Qian Ting Shi Yaokang Lv Yafei Liu Lihua Gan Mingxian Liu Dazhang Zhu Shanghai Key Lab of Chemical Assessment and Sustainability School of Chemical Science and EngineeringTongji UniversityShanghai 200092China College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450001China

The bio-nanotechnological fabrication of high-surface-area carbons has attracted widespread interest in supercapacitor applications by using readily-available natural products as raw materials or bio-templates,and is expected to refine on pore accessibility for compact energy storage. Here, a renovated design strategy of semi-biomass interpenetrating polymer network(IPN) derived carbon is demonstrated through physically knitting the biomacromolecule(sodium alginate, SA) polymeric chains into the highly crosslinked resorcinol-formaldehyde(RF) network and subsequent thermochemical conversion. Moleculelevel interlacing forces in such IPN efficiently relieve the RF skeleton shrinkage when producing carbon,while the other SA network addresses the macrophase separation issue to sacrifice as an in-knitted porogen and a morphology-directing agent. As a result, porous carbon globules are equipped with moss-like surfaces and interconnected pore architecture for high accessible electrode surface(1013 m^(2)/g), and efficient electrochemical responses are reached with the specific capacitance of 312 F/g at 1 A/g. Taking the advantage of 9 mol/kg NaClO_(4) complex-solvent electrolyte, the voltage window is extended to 2.4 V,endowing the two-electrode device with the high energy delivery of 32.3 Wh/kg at 240 W/kg.

关键词： Porous carbon electrode interpenetrating polymer network Biomass Supercapacitor Water-in-salt electrolyte

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PREPARATION AND PROPERTIES OF GEL polymer ELECTROLYTE BASED ON PVDF/ACRYLATE interpenetrating polymer network FOR DYE-SENSITIZED SOLAR CELL

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Transactions of Nanjing University of Aeronautics and Astronautics 2010年第4期27卷 353-360页

作者：杨艳陶杰金鑫秦琦南京航空航天大学材料科学与技术学院

The gel polymer electrolytes（GPEs）based on poly（vinylidence fluoride）（PVDF）/acrylate interpenetrating polymer network（IPN）are *** micro-phase separation type GPEs are characterized by Fourier transform infrared（FTIR）spectroscopy,scanning electron microscope（SEM）,***,the conductivity and the voltage-current curves of the electrolytes are measured by electrochemical *** higher porosity and electrolyte uptake are observed in the membranes prepared at lower crosslinker *** suitable cross-linking acrylate monomer improves the porosity and the electrochemical behavior of GPE.A dye-sensitized solar cell（DSSC）employing PGE based on PVDF/poly（ethylene glycol dimethacrylate）（PEGDMA）IPN yields an open-circuit voltage of 0.674 V,short-circuit current of 8.476 mA·cm-2and the conversion efficiency of 2.710% under 100 mW·cm-2illumination.

关键词： solar cells interpenetrating polymer network ploymer films gels

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Preparation of Semi-interpenetrating polymer network of Silicon Rubber and Poly(methyl methylacrylate) Using Supercritical CO_2

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Chinese Chemical Letters 2002年第7期13卷 683-684页

作者： Zhi Min LIU Jia Qiu WANG Guan Ying YANG Bu Xing HAN Center for molecular sciences Institute of ChemistryChinese Academy of SciencesBeijing 100080

The heterogeneous free-radical polymerization of methyl methylacrylate (MMA) and divinylbenzene (DVB) as cross-linker within supercritical carbon dioxide-swollen silicon rubber (SR) has been studied as an approach to preparing semi-interpenetrating polymer network (semi-IPN) of SR and poly(methyl methylacrylate) (PMMA). The SR/PMMA semi-IPNs were characterized by scanning electron microscopy (SEM) and dynamic mechanical analyzer (DMA).

关键词： Supercritical CO2 interpenetrating polymer network silicon rubber poly(methyl methylacrylate) polymerization.

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Gas Permeability and Free Volume Hole Properties of interpenetrating polymer network Studied by Positrons

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Wuhan University Journal of Natural Sciences 2007年第2期12卷 271-274页

作者： QI Ning GONG Wei WANG Zhifen WANG Bo YANG Yurun HU Chunpu School of Physics and Technology Wuhan University Wuhan 430072 Hubei China Institute of Material Science and Engineering East China University of Science and Technology Shanghai 200237 China

A series of polyurethane/epoxy resin interpenetrating polymer networks （PU/ER IPN） were studied by positron annihilation lifetime spectroscopy （PALS）. The effects of epoxy resin type and content on the free volume properties in IPN were investigated. We found that in PU/ER IPN, the free volume hole size and fractional free volume showed a negative deviation due to closer segmental chain packing through some chemical bonding between PU and epoxy resin. Direct relationship between the gas permeability and the free volume has been established based on the free volume theory. Experimental results revealed that the free volume plays an important role in determining the gas diffusion and permeability.

关键词： interpenetrating polymer network positron annihilation free volume gas permeability

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Microstrueture and Properties of Fluoroelastomer/Butadiene-Acrylonitrile Rubber interpenetrating polymer networks

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Journal of Wuhan University of Technology(Materials Science) 2008年第1期23卷 50-53页

作者：陈春明 XIONG Chuanxi YANG Jian DONG Lijie School of Material Science and Engineering Wuhan University of Technology Wuhan 430070 China Department of Chemistry Hanshan Normal University Chaozhou 521041 China

interpenetrating polymer networks （IPNs） based on fluoroelastomer/butadiene-acrylonitrile rubber （FKM/NBR） by molten blending at a high temperature and chemical cross-linking of two components were prepared. The influence of the two networks component on the mechanical properties and thermostabilities was studied. The experimental results show that the mechanical properties of the IPNs are superior to those of the individual FKM and NBR networks due to forming the case of interpenetrating and intercross-linking between the two networks, the mechanical properties and thermal resistance exhibit higher values when 80/20 （w/w） FKM and NBR is blended and respectively cured simultaneously. The co-continuous morphology of the IPNs in the blends of 80/20 （w/w） FKM/NBR is found by transmission electron microscopy （TEM）, the differential scanning calorimetry （DSC） determination shows that the blends of 80/20 （w/w） FKM/NBR have better compatibility, and the glass transition temperature of the elastomer is -21.5 ℃.

关键词： fluoroelastomer butadiene-acrylonitrile rubber interpenetrating polymer network blends

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SYNTHESIS AND PROPERTIES OF POLYURETHANE ACRYLATE/EPOXY RESIN interpenetrating polymer networkS

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Chinese Journal of polymer Science 1988年第3期6卷 244-250页

作者：石有恒聂绪宗 Institute of Chemistry Academia Sinica Beijing

In this paper, a series of interpenetrating polymer networks （IPNs） based on polyurethane acrylate and epoxy resin was prepared by simultaneous photoinitiating by both free-radical and cationic polymerization. The effects of the polyurethane acrylate prepolymer’s molecular weight, various components ratio and polymerization methods on IPN’s dynamic mechanical and mechanical properties were investigated.

关键词： interpenetrating polymer network UV curing Photopolymerization Polyurethane Epoxy resin

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Studies on the Morphology of Natural Rubber/Polyacrylate interpenetrating polymer networks

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Chemical Research in Chinese Universities 1990年第1期6卷 85-89页

作者： Llao Kalrong (Institute of polymer Science, Zhangshan University, Guangzhou)Thomas C. Ward (Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA)

The interpenetrating polymer network(IPN) systems have attracted a lot of attention because of their unique two-phase structure and properties. There have been many publications concerning the IPNs in which poly (isoprene) (PIP) or polyacrylates (PAC) is formed as one of the *** the present study, Four serles of natural rubber(NR)/PAC IPNs were prepared and their morphologies were investigated with dynamic mechanics analysis(DMA) and transmission electron microscopy (TEM).

关键词： interpenetrating polymer network Natural rubber Polyacrylate

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