Tạp chí Hóa học

VIEN HAN LAM KHOA HQC VA CONG NGHE VIET NAM VIETNAM ACADEMY OF SCIENCE AND TECHNOLOGY lssN 0866-7144 2017 A\VIBN HAI\T LI\M KHOA HOC VA CONG NGHE VIET NAM T3p chi H6a hgc, T.55, sd 1 - 2017 MUC LUC TABLE OF CONTENTS Trang 1 VA thdnh h6a hqc tu dich chiiSt etyl axetat cria cdy nhin dO (Lepisanthes rubiginosa) thu h5i 1 tqi HuyQn Phf LQc, tinh Thria Thi6n - Huii. Chemical constituents of ethyl acetate extract of Lepisanthes rubiginosa collected in Phu Loc district, Thua Thien - Hue province. Phqm Thi Ninh, Triin Thi Phuong Thdo, Trdn Vdn LQc, Nguydn Thi Dung, BS.XuAn Ciim, Trdn Vdn Sung 2 Nghi€n cr?u chO t4o vflt liQu xric tirc dqnghydrotalcite 3 kim loai Mg-Al-Co. 6 Study on preparation of hydrotalcite based catalyst containing Mg-Al-Co compositions. Nguydn Khdnh DiQu Hing, Nguy.6n ldn Hing, Nguydn Trung Thdnh 3 Nghi6n ciru inh hu&ng cria nanosilica <ltin tinh ch6t co hgccria mdng polyme epoxy DER 12 671X75. Study on the effects of silica nanoparticles to mechanical properties of polymer coating film based on epoxy resin DER 67IX75. Hu)nh L€ Huy Cudng, Trdn Wnh DiQu, Nguydn Ddc Thdnh, Dodn Thi Ydn Oanh 4 Nghi0n cr?u mQt sO trgp ch6t thr? c6p tu chring xp khuAn Sffeptomyces sp. (G065). 19 Secondary metabolites from marine bacterium Streptomyces sp. (G065). Cao Duc Danh, Vfi Vdn Nam, Dodn lhi Mai Huong, V[i Thi Quy€n, Le Thi H6ng Minh, Brian T. Murphy, Trdn Ddng Thqch, Chdu Vdn Minh, Phqm Vdn Cwdng 5 Anh huqng <l6ng thdi cria cacbon hiru co hda tan, ch6t ho4t ttQng b€ m[t vd natri oxalat d6n 24 sg giii hdp thudc tni sdu. Simultaneous effect of dissolve organic carbon, surfactant and sodium oxalate to pesticides desorption. Trinh Thu Hd, Bjarne W. Strowble, Nguydn Quang Trung, LA Trrdng Giang 6 Nghi6n cr?u ch6 t4o vit liQu c6 d0 b6n nhi6t, b€n co ly cao vd hdm tro th6p tt cao su nitril. 31 Investigation on the high thermal stability, high mechanical strength and low ash content material from nitril rubber. Chu Chidn Hiru Z f6i uu h6a phin ring thtry phdn mdt bd cho quy trinh thch axit cholic bing phucrng ph6p bC 38 m[t ilSp img. Optimization of the cow bile hydrolysis for isolation of cholic acid using response surface method. Trin B\i An, Phan Minh Vuong, Phgrn Cao Thanh Tilng, Phan Thanh Thdo 8 Nghi6n cr?u khi nlng chiSng 5n mdn mAi mdn cua lorp phri hqp kim NiCr2O ttugc thAm th6u 43 v6i photphat nh6m trong mdi tnrtmg axit Study on the corrosive wear resistance of NiCr2O alloy coating impregnated by aluminum phosphate in acidic media. Nguydn Vdn Tudn, Pham Thi Hd, Phqm Thi Li, Vd An Qudn, Dinh Thi Mai Thanh, LO Thu Quy, Phqm Dthc Rodn 9 Thdnh phAn h6a hgc cua cdy Nggc cilt (Balanophora laxiflora Hemsl.) thu t4i Tuy6n Quang 48 PhAn l. Thdnh phAn h6a hgc cua chc cinchir5t it phin cqc. Chemical constituents of Balanophora laxiflora Hemsl. collected in Tuyen Quang. Part 1. Chemical constituents of the lesspolar extracts. Trdn Dthc Dqi, Nguydn QuyAt Ti6n, Nguydn Nggc Tuiin, Nguydn Qudng An, Truong Thi Thanh Nga, Trinh Thi Thily, Nguydn Thi TuyiSt, Dfing Ngoc Quang 10 Kh6o s6t sg bit5n eOi nam luqng hypoxanthine vd histamine trong tOm sri bdo quin d 0"C. 52 Survey on hypoxanthine and histamine concentrations in black tiger shrimp (Penaeus monodon) stored at 0oC. L€ Nhiit Tdm, Dodn Nhu Khu1, Trdn Thi Vdn Thi 1l Nghi6n cr?u lithuytlt co ch6 vd itQng hoc cua phin img gifia gdc propargyl (C.Hr) vcri nguyOn 58 tu hitlro (H) bdng phuong ph6p phi6m hdm mflt itQ. Theoretical study on the reaction mechanism and kinetics between propargyl radical and hydrogen atom by means of density functional theory. Phgm Van Ti6n 12 Nghi6n cuu chrS tpo, c6u truc vdL tinh ch6t cira v4t li0u cao su nanocompozit trdn co s0 cao su 66 thi6n nhi6n, cao su cloropren gia cudng nanoclay. Study on preparation, structure and properties of rubber nanocomposites based on natural rubber (NR)/chloroprene rubber (CR) blends reinforced with nanoclay. Lucrng Nhu Hdi, Pham C6ng Nguy€n, Ng6 Trinh Titng, Lru Duc Hilng, Dd Quang Khdng 13 TOng hqp vflt li6u F-TiOz/Bent vd d6nh gi6 hoat tinh quang xl.uc t6c trong ving 6nh s6ng khi 7l ki6n. Synthesis of F-TiO2/Bent material and evaluation of photocatalytic activity under visible light. Nguy1n Thi Di€u Ctim 14 T6ng hqrp mQt sO adn xu6t exahydropyrazin-ft,2bl-isoquinolin. 76 Synthesis of derivatives of hexahydropyrazine -fl, 2,bl-isoqtinoline. Vil Dric Cadng, Phqm The Chlnh, Dqng Thi TuyiSt Anh, Phqm Thi Thdm, Qudch Thi Thanh Vdn, Nguy€n Vdn TuyAn 15 Nghi€n cr?u t6ng hqp vft liQu polysunfat sit, img dung cho qu5 trinh keo tu. 81 Synthesis of polyferric sulphate (PFS) using for the coagulation. Qudn Th! Thw Trang, LA Hd Giang, Phgm Vdn Ldm 16 Ch6 t4o vd kh6o s5t tinh chAt cira vQt liQu compozit PVC/h6n hgp than den vd tro bay bii5n 86 tinh. Preparing and surveying properties of PVC composite reinforced by carbon black and modified fly ash. Nguydn Duy Todn, Trdn Thi Thanh Vdn, Dd Quang Thiim, Nguydn Vfi Giang, Nguy€n Thuy Chinh, Thdi Hodng T4p chi H6a hoc, 55(l): 43-47,20tj DOI: 1 0. I 5 625/0866-7 I 44.20 I 7-004 I 4 Nghi6n cr?u khd lang ch6ng dn mon mii mon cria l6p phri hqp kimNicr2O dugc th6m th6u v6i photphat nh6m trong mbi'trudng axit Nguydn V[n Tufnl, ph4m Thi Hir, ph4m Thi Lyr., V6 An eudnl,Dinh Thi Mai Thanht, LO thu eryr, ph4m Dri.c RoinJ 'ri,n xy thudt nhi€t d6i, vi€n Hdn l6m Khoa h\c vd c6ng ngh€ vi€t Nam tPhdng thi nghiam tpng diem C6ng ngh€ Hdn vd xr;r ry bA mfit - vi€n nghi€n ctru co khi 'Tradng Dai hoc Sa phgm Hd N6i DOn Tda sopn 18-12-2015; Chdp nh6n cldng 6-02-20t7 ^{bstract by aluminum phosphate and heat-treated containing SiO23 yo by weight; the flow stable crystalline phases in acidic media made corrosive wear resistance of NA6 coating increase in comparison with the resistance measured on NA10 and NC coating samples. The formation of unstable crystalline phases such as Al36P36O1aa and Ni3(POa)2 in NA10 coating caused the-corrosive wear resistance ofNA10 coating smaller than that one measured on NC coating. After 168 houis of corrosive wear test, the thickness ofNA6 coating reduced to about 47 pm,while it was about 67 [mforNC coating. Keywords. Thermal spray, aluminum phosphate sealant, acidic corrosion, corrosion wear. I. MO DAU Hqp kim NiCr2O t<Ct nqp dugc c6c tinh chSt cria Cr vd Ni c6 uu dii5m ld c6 kh6 ndng chiu nhi€t, chdng dn. mdn.vd cl6 ao trong nhi6 ti chAt. Tuy ld m6t trong mm A6t ti€ su dung chring d dgng lop phir ld m6t hu6ng duoc uu ti6n lua chon. ch6ng dn mdn cta lcrp phri ndy thi c6ng clo4n xir ljz ldm gi6m dd x6p cira lcrp phir sau khi phun ld cAn thi6t. Photphat nh6m duoc sir dung d6 thAm th6u th6 ld, so v6i HVOF vir plasma, c6ng ngh6 phun phri h6 quang hiQn vAn ld c6ng ngh€ don giin,' c6tinh co Bdi b5o ndy sd trinh bdy cdc kt5t qu6 nghidn criu 2. TH[I. C NGHTEM 2.1. Htuchft . C6c h6a chdt chinh su dung trong nghiOn criu gom: axrt photphoric H3PO4 85 o/o, hydroxit nh6m A(OH)3 dang bdt, axit sulfuric HzSO+ pH2;nuoc cilt; tdm th6p C45 vd dAy NiCr2O O2mm c6 thdnh phAn: 18,16 o/o Cr,0,9 Yo Fe; hat rin SiO2 achdt c6 ngu6n 96 43 TCHH,55(1) 2017 2.2. Phucrng phip chuAn bi m6u vdr mOi trulng thir nghiQm Lcrp phri NiCr20.ttugc ch6 tpo bing phuong ph6p phun phir nhiQt h6 quang cliQn. DAy NiCr2O v6i dung dich vdi d0 nhcvt do- bing c6c do BZ4 lit 117,36 s; ti trgng 1,58 g/cm' [8] dugc qu6t l6n tr0n bO mat lcrp phir hcr,p kim NiCr2O vd cl0 6n dinh sau l2htru6c khi xu lj'nhiQt. Lop phir hqp kim NiCr2O co photphat nhdm thAm th6u dugc xu lj'nhiQt tpi nhiQt d0 600 vd 1000 "C c6 ki hiQu l6n luqt"ld NA6 vd NAl0. Lcrp phir NiCr2O khdng dugc th0m thAu v6i photphat nh6m c6 ki hiQu ld NC. Mdu nghiOn cuu dugc thu nghiQm trong m6i hinh thu nghiQm 5n mdn mdi mon duoc th€ hiOn trong hinh 1. 2.3. Phuong phip nghiOn ctfru C6c mdu lcrp phir duoc thu nghiQm 168 gid, do chi6u ddy vd do cliQn h6a theo thoi gian. Chi€u ddy lcrp phir theo thoi gian clugc thuc hi6n v6i ctdu do Mitutoyo DIGI-DERM 745 (NhQt Bnn). tvt6i m6u dugc do chidu ddy tai 5 di0m/l ldn do, sau d6 lay gi6 tri trung binh. E t SiO: B0 phiD gi qio Bm 1rls50 Phsm fhi Li vd cQng su Ph6p do iliQn h6a thuc hi€n tr6n thiet bi AUTOLAB PGSTAT302N, su dung hQ 3 di6n cuc: rliQn cuc so sSnh calomen bdo hda, diqn cUc d6i platin.vir diQn cr,rc^ ldm viQc ld m6u lcrp phir c6 diQn tich bd mdt 1 cnf. Qu6t duong cong phAn clrc vcri Diqn thO 6n mdn vd" mflt dQ ddng 6n mon dugc x6c clinh theo ti6u chudn ASTM G102. Ph6 t6ng tro dugc qu6t trong khoAng tAn sd 104+102 Hz v6i l0 dii5m/decade vd bi6n d0 dao dQng thd ld 5 mV. CAu truc mdt ciltngang cira c6c m6u tru6c vd sau khi ngdm trong dung dich axit sulfuric tlugc phdn tich bdng kinh hi6n vi cliQn tu qu6t (SEM) tr6n thi6t bi JEOL JMS-6490. Thdnh phAn pha tinh th€ dugc x5c Alnn U11S phuong ph6p nhi6u xp tia X (XRD) tr€n thi€t bf phdn tich Ronghen D5005 vdi bfc x4 CuKo, g6c 20 quet trong khodng 5+70o. budc qu6t 0,02"/s. 3. KET QUA VA THAO LUAN 3.1. Phin tich XRD xic tlinh s6'n phAm in mdn Thdnh phAn pha tr6n bO mir chc lop phir tru6c va ch6"t AlzPoOrs (monoclinic), Al:oP:oOrr- (orlhohombic) vd Ni3eO4)2 (monoclinic) dd bi hoa tan trong m6i trucrng axit HzSO+ pH2. Sg- xudt hiQn ctra phalinh thc Al(Po3)3* (cubic) trOn bd mit mdu NA10 sau khi thu nghiQm clugc gi6i thich ld do ban dAu hdm lugng pha tinh th6 ndy qu6 nho so vdi c6c pha khdc n€n kh6ng xu6t hiQn pic nhi6u xa trOn giin CO Xru. Sau qu6 trinh thu nghiCm in mon mdi mdn, hai hqp chAt Al36P36O.1aa vd Nir(PO+)z bi hoa tan dd tao ttiOu kiQn ldm xu6t hiQn pic nhiSu xp cua (Orthohombic) hiQm v6n t6n tqi hqp chdt ndy bi hda tan chflm. 2.2.1<(:t qui tlo chid:u ddry mf,u theo thoi gian Chi6u ddy c5c mdu lop phu deu gi6m trong qu6 trinh thu nghiQm (hinh 3). Sau 168 gio thu nghiOm. c5c m6u NC, NeO, NA10 c6 chi0u ddy gi6m lAn lucrt 44 D@t dlcb l{:SOr pEl rtio && "ghiin Hinh l: M6 hinh thu nghi0m in mdn mdi mdn TCHH, 55(1) 2017 Nghi€n ctru khd ndng chdng dn mdn... mdi mdn trong m6i trucrng axit HzSO+ pH: 2 c6 1_ slm AIPO4 2_ At(Po3)3 (Nl 3_AtPo. (') 4_At(Po")" rl la) l_ syn AIPO. 2_At{POr)3 (Nl 3_ AtFq (.1 4_Ar(Fo3)3 rl 5_Al2P"O1B 6-Al."P"ro,- 7_ Ni3(PO4)' NA1 O NA6 NC at, CL(J NAl O NA6 NC a9 EI o = 30 40 2-Theta 20 30 40 50 60 2-Theta Hinh 2: Thdnh phAn pha photphat nh6m tron b€ mat lcrp phir cira c6c m6u tru6c (a) vd sau thu nghiOm (b) trong m6i trudng dn mdn mdi mon nhanh sau 31 gio vd gidm nhanh hon trong khoAng tu 3l-"$€n 168 gio thir nghiOm so v6i khodng rhoi gian cl6u. Nguy6n nhAn ld do trong khodng thoi gian ddu, b€ mdt mdu NC c6 d0 nhrlm l6n vd kh6ng <luoc che chin bOi l6p photphat nh6m n€n <ld bi chiu tdc c6 trong dung dich tucrng t.u nhu m6u NC. OOI vOl NA6, do duoc che chin bdi c6c tinh th€ photphat nh6m bdn trong mdi trudng axit ndn su t6c tl6ng cria t6c nhAn 5n mdn mdi mon vdo lop phir NiCr2O k6m hon, chidu ddy lorp phri gidm chdm. 3.3. PhO t6ng tr0 di6n h6a _ Ph6 t6ng trd cli€n h6a (gian d6 NyquisQ cua c6c m6u sau khi thu nghiCm trong dung dich axit HzSO+ pH: 2 c6 chria chc h1t rdn SiO2 tluoc thO hi€n tr6n hinh 4. Kh6i qu.at cho thAy, phd tdng trd cira c6c m6u tai hai thoi dii5m khiic nhau ddu c6 dang hai b6n cung n6i ti6p. B6n cung thri nh6t gin gii" J,iu AO tni cl4c tnmg cho cli6n trl cin dung dich. Bdn cung thir hai cl a hQ lcrp phir. Khi tAn s6 <lat g cti6m cu6i cins cira b5n cung clugc x6p xi b=ing diQn ffO.lop phri. Gi5 tri ndy cdng l6n thi khe ndng b6o vQ ch6ng 6n mdn cria m6u l6p phri cdng cao [9]. 0,01 5 o,o2 €- o,o3 0.04 ! = 0,05 € o,oj6 :, o,oz F 0,08 o 20 40 60 80 100 120 140 160 180 Thdi gian ngAm mau ft) Hinh 3: Sg thay eOi ctri6u ddy lorp pht so vdi tru6c khi thu nghiOm trong mdi trucrng dn mdn mdi mdn So s6nh tdng trd cua cilc mdu sau 8 gio thir Quy luAt ndy cfing xiry n tuong t.u ddi v6i cdc mdu sau 168 gio thu nghi6m. Sau 168 gio thu nghi6m, tdng trd cria m6u NC vd NA6 tdng d6ng k6. C6c k6t qui nghi€n cr?u trong [10], chi ra ring, trong dung 45 - --:j'1t2017 - - - :. thei Aht ___ :. sau sau -- - n- thC bAo = ;hong 6n mdn trong m6i truong axit ctra lcrp phu Pham fhi Li,vii cQng s1r (b) e. 6000 -FJ sooo 0 6 6000v N sooo 't5000 18m06@0 m00 z(o) 6 rooo 6000 sooo 12ooo I z (()) Hinh 4; Ph6 Nyquis t cua cilcmdu lcrp phir sau khi thu nghiQm 8 gio (a) vd iOS gio (b) trong m6i truong 6n mdn miri mon 3.2. Xfcdinh m0t iIQ dirng [n mdn theo thiri gian trinh 6n mon di6n ra trong lcrp phtr, ldm m4t ilQ dong 5n mdn do dugc d thdi di6m sau 168 gio thu nghiOnr nh6 hon so v6i thoi ditim thu nghiQm sau 72 giri' do qu6t duong con 6t qud do chi6u ddy dugc o trdn' d zo no oo Eo 1oo 120 14o 160 180 Thiri gian ngam mau (h) 4 0x10' E zoxio Hinh 5:Bi6n thi6n mOt d0 dong 6n mdn J"o' 3.4.K6tqui do SEM NA6 da c6 chidu ddy lop phu lcrn hon, d6ng tht' trong qu5 trinh thu nghiQm, mAu ndy bi mdi mdn i' hon. Hinh anh SEM th6 hiQn cAu truc mdt cdt ngani ctra c6c mdu lcrp phir cho thdy, cfrc m6u NC vd NAI c6 nhiOu fd xOp hon to v6i m6u NA6' KCt qud na'' mdt lAn nta khing dinh khi ndng b6o vQ ch6ng a: -in "m mdu NAZ tdt hon so vdi c6c m6u NC r ' NAlO. 46 TCHH, 55(I) 2017 1. Hinh 6: Anh chup SEM cria c6c m6u lop phtr sau khi thu nghiOm 168 gio trong m6i truong dn mdn mdi mdn L KET LUAN . Lcrp phir hqp kim NiCr2O sau khi cluoc thAm thdu vdi pho@hat nhdm vd xu li nhi6t tai 600 "C c6 <10 b€n 6n mdn mdi mdn trong mdi truong axit cao hcrn so v6i lop phri kh.ong cluoc thdrm th6u cflng nhu lop phri cluoc th6m th6u v6i photphat nh6m vd xu li tai 1000 "C. trucrng axit c6 chria c5c t6c nh6n gAy mdi mdn. Lorp phri hqrp kim NiCr2O sau khi thAm th6u v6i photphat nhdm vd duoc xu li nhiet tai 1000 oC, nong l6p. phir c6 sg hinh thdnh c6c pha tinh th6 khdng b6n trong mdi truong axit (AlpO4* vd Al36P36O1aa) ldm suy gidm kh6 ndng chdng dn mdn cua lcrp phri hong mdi trudng axit c6 cilc thc nhdn giy mdi mdn. SU c6 mdt cira c6c pic nhi6u xa ddc tnmg cho .). cac thiinh phan pha syn_AlPOa vd AI(PO3)3(N) tr6n b0 mpt lop phtr sau khi mdu duoc ngdm 168 gio trong m6i trucrng H2SO4 pH: 2 c6 chria t6c nhAn mdi mon chimg t6 ring clc phandy khdng bi hoa tan trong mdi trudng thu nghi6m. Ldi cim on. 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Nguy6n Vdn Tu6n, L6 Thu Quj,, Nguy6n Thu Hodi. Nghi€n cwu ch€ tqo chdt Uit pnih pnat nh6m, T4p chi H6a hoc, 49(2ABC),796-800 (2011). F. L. Vadim. Impedance Spectroscopy: Applications to E lectrochemical and Dielectric Phenomena, W iley (2012). kim NiCr trong m6i trudng axit sulfuric, Tap chi H6a hgc, 52(6A), 132-136 (2014). 2 /1T. 5 8 9 l0 47