Bisphenol A (BPA): Tus Tsim Khoom Siv Zoo Tshaj Plaws
Kev Tshawb Fawb Txog Cov Khoom Siv Physicochemical Tseem Ceeb
Cov Qauv Molecular Tshwj Xeeb: Lub molecule BPA yog tsim los ntawm ob pawg phenolic hydroxyl txuas nrog lub cev pob txha propane. Cov qauv no muab nws nrog cov tshuaj lom neeg tshwj xeeb. Ob pawg phenolic hydroxyl muab BPA muaj zog nucleophilicity, ua rau nws muaj peev xwm ua rau ntau yam tshuaj sib xyaw. Tib lub sijhawm, lub cev pob txha propane muab lub molecule nrog qee qib ntawm kev rigidity thiab steric hindrance, cuam tshuam rau kev xaiv thiab kev ua haujlwm ntawm BPA hauv ntau yam tshuaj lom neeg.
Cov Khoom Siv Lub Cev: BPA muaj qhov kub yaj ntawm 158 - 159 ° C, qhov kub npau txog li 400.8 ° C, thiab qhov ceev ntawm kwv yees li 1.195 g / cm³. Nws cov ntsiab lus yaj thiab kub npau siab ua kom nws ruaj khov nyob rau hauv qhov kub thiab txias ib txwm muaj, thaum nws qhov ceev tsim nyog ua lub luag haujlwm hauv cov xwm txheej thov uas xav tau cov khoom siv ceev tshwj xeeb, xws li hauv kev npaj qee yam yas thiab cov resins, qhov twg cov yam ntxwv ceev ntawm BPA tuaj yeem cuam tshuam rau cov khoom siv lub cev thiab kev ua cov khoom kawg. Nws yog me ntsis soluble hauv carbon tetrachloride, tsis tshua soluble hauv dej, tab sis soluble hauv ntau yam organic solvents, thiab qhov kev sib xyaw ua ke no txiav txim siab nws cov kev ua haujlwm thiab cov txheej txheem thov hauv ntau yam tshuaj.
Daim Ntawv Tshuaj Xyuas Zoo rau Bisphenol A
| Analyte | Chav tsev | Cov Lus Qhia Tshwj Xeeb | Qhov tshwm sim | Txoj Kev Ntsuas |
| Qhov tsos | / | Dawb granular los yog flaky, Tsis muaj mechanical impurities | Dawb granular, Tsis muaj mechanical impurities | GB/T 28113-2011 |
| Bisphenol A | Hauv/% | ≥99.85 | 99.925 | GB/T 28113-2011 |
| Phenol | Hauv/% | ≤0.005 | 0.001 | GB/T 28113-2011 |
| 2,4-Isomer | Hauv/% | ≤0.050 | 0.01 | GB/T 28113-2011 |
| Crystalline Point | °C | ≥156.6 | 157.2 | GB/T 28113-2011 |
| Chroma yaj | Xim, Pt-Co (Hazen Unit) | ≤20 | 10 | GB/T 28113-2011 |
| Kev daws teeb meem Chroma | Xim, Pt-Co (Hazen Unit) | / | 5 | GB/T 28113-2011 |
| Cov dej noo | Hauv/% | ≤0.08 | 0.02 | GB/T 6283-2008 |
Cov Ntawv Thov Tseem Ceeb hauv Ntau Qhov Chaw
Kev Tsim Khoom Siv Yas thiab Resin:
Kev Tsim Khoom Polycarbonate (PC): BPA yog cov khoom siv tseem ceeb rau kev tsim cov polycarbonate (PC). Polycarbonate sawv tawm hauv ntau qhov chaw vim nws qhov pom kev zoo heev (kev xa lub teeb ntau dua 90%), kev tiv taus kev cuam tshuam siab (250 - 300 npaug ntawm cov iav ib txwm), kev ruaj khov zoo, thiab kev tiv taus kub (kub hloov pauv kub txog li 130 - 140 ° C). Hauv kev lag luam hluav taws xob thiab hluav taws xob, PC siv dav los tsim cov thawv ntawm cov khoos phis tawj, xov tooj ntawm tes, thiab lwm yam khoom siv hluav taws xob, uas tsis tsuas yog muab kev tiv thaiv txhim khu kev qha rau cov khoom siv sab hauv tab sis kuj txhim kho kev sib tw ua lag luam ntawm cov khoom vim lawv qhov zoo nkauj thiab cov qauv zoo. Hauv kev lag luam tsheb, PC siv los ua lub hau teeb taub hau tsheb, cov vaj huam sib luag ntsuas, thiab lwm yam khoom. Kev xa lub teeb siab ntawm lub hau teeb taub hau ua kom muaj kev ci ntsa iab thaum hmo ntuj, thaum qhov ruaj khov ntawm cov vaj huam sib luag ntsuas lav qhov sib dhos meej thiab kev siv mus sij hawm ntev ntawm cov khoom. Hauv kev tsim kho, cov vaj huam sib luag hnub ci ua los ntawm PC, cov ntaub thaiv teeb pom kev zoo, thiab lwm yam khoom siv dav dav hauv cov tsev pej xeem xws li cov khw loj thiab cov chaw ua si vim lawv qhov kev tiv thaiv zoo heev thiab kev xa hluav taws xob, tsim kom muaj qhov chaw sab hauv tsev ci ntsa iab thiab muaj kev nyab xeeb.
Kev Tsim Cov Epoxy Resin: BPA kuj yog ib qho tseem ceeb monomer rau kev npaj cov epoxy resins. Cov epoxy resins muaj kev nplaum zoo heev thiab tuaj yeem sib txuas ntau yam khoom xws li hlau, ntoo, thiab iav, yog li lawv nyob hauv txoj haujlwm tseem ceeb hauv kev lag luam nplaum. Hauv kev lag luam aerospace, cov nplaum epoxy yog siv rau kev sib txuas cov khoom siv dav hlau kom ntseeg tau tias muaj kev ncaj ncees thiab kev nyab xeeb ntawm cov qauv dav hlau hauv qab cov xwm txheej dav hlau nyuaj. Tib lub sijhawm, cov epoxy resins muaj cov tshuaj tiv thaiv corrosion zoo thiab cov khoom rwb thaiv tsev thiab siv dav hauv cov ntaub ntawv ntim khoom hluav taws xob thiab cov txheej txheem. Piv txwv li, cov laug cam hauv cov khoom siv hluav taws xob feem ntau yog encapsulated nrog epoxy resins los tiv thaiv cov khoom siv hluav taws xob los ntawm kev puas tsuaj sab nraud thiab txhim kho kev ruaj khov thiab lub neej ua haujlwm ntawm cov khoom siv hluav taws xob. Hauv qhov txheej txheem txheej, cov txheej txheem epoxy resin yog siv rau kev tiv thaiv nto hlau, uas tuaj yeem tiv taus qhov corrosion ntawm cov tshuaj lom neeg xws li acids thiab alkalis thiab ua kom lub neej ua haujlwm ntawm cov khoom hlau ntev dua.
Lwm Cov Kev Siv Tshuaj Zoo:
Kev Tsim Cov Tshuaj Tiv Thaiv Hluav Taws: Cov tshuaj tiv thaiv hluav taws xws li tetrabromobisphenol A tuaj yeem tsim los ntawm BPA. Kev ntxiv cov tshuaj tiv thaiv hluav taws yog qhov tseem ceeb heev hauv kev lag luam xws li cov khoom yas thiab cov ntaub. Hauv cov khoom yas, cov tshuaj tiv thaiv hluav taws tuaj yeem txo qhov kev kub hnyiab ntawm cov khoom siv. Thaum raug rau qhov chaw hluav taws, cov roj uas tsis kub hnyiab lossis cov txheej carbonaceous uas tsim los ntawm cov tshuaj tiv thaiv hluav taws tuaj yeem thaiv kev hloov pauv ntawm oxygen thiab cua sov thiab tiv thaiv kev sib kis ntawm kev sib xyaw. Piv txwv li, kev ntxiv cov tshuaj tiv thaiv hluav taws rau hauv cov yas ntawm cov khoom siv hluav taws xob thiab hluav taws xob tuaj yeem txo qhov kev pheej hmoo ntawm hluav taws thiab tiv thaiv tib neeg lub neej thiab khoom vaj khoom tsev. Hauv cov ntaub, kev siv cov tshuaj tiv thaiv hluav taws tuaj yeem ua rau cov khaub ncaws tsis tshua muaj kev kub hnyiab thaum ntsib qhov chaw hluav taws thiab txo qhov kev puas tsuaj los ntawm kev sib xyaw khaub ncaws hauv hluav taws.
Cov Tshuaj Antioxidants thiab Cov Khoom Siv Tiv Thaiv Kub: BPA tuaj yeem siv ua cov tshuaj antioxidant thiab cov khoom tiv thaiv kub hauv qee cov khoom yas thiab roj hmab. Thaum lub sijhawm ua cov yas, cov yam xws li kub siab thiab oxygen yooj yim ua rau cov yas laus thiab puas tsuaj, cuam tshuam rau kev ua haujlwm ntawm cov khoom thiab lub neej ua haujlwm. Ua ib qho tshuaj antioxidant, BPA tuaj yeem ntes cov free radicals hauv lub kaw lus yas, tiv thaiv kev hloov pauv ntawm cov tshuaj oxidation, thiab ncua cov txheej txheem laus ntawm cov yas. Tib lub sijhawm, ua ib qho tshuaj tiv thaiv kub, BPA tuaj yeem txhim kho kev ruaj khov ntawm cov yas hauv qhov chaw kub siab thiab tiv thaiv cov yas los ntawm kev lwj, kev hloov pauv, thiab lwm yam teeb meem thaum lub sijhawm ua lossis siv. Hauv cov khoom roj hmab, BPA kuj tuaj yeem ua lub luag haujlwm zoo sib xws, txhim kho kev tiv thaiv kub thiab oxygen ntawm roj hmab thiab ua kom lub neej ua haujlwm ntev ntawm cov khoom roj hmab xws li lub log tsheb thiab cov roj hmab foob.
Kev Tsis Sib Haum Xeeb thiab Cov Lus Teb ntawm Kev Lag Luam
Kev Tshawb Fawb Txog Kev Phom Sij Rau Kev Noj Qab Haus Huv: BPA muaj qee yam tshuaj lom tsawg thiab tuaj yeem tsiv teb tsaws chaw thiab hloov pauv hauv ib puag ncig thiab tib neeg lub cev. Muaj ntau txoj kev tshawb fawb tau qhia tias BPA muaj cov teebmeem zoo li estrogen thiab tuaj yeem cuam tshuam rau tib neeg lub cev endocrine. Tshwj xeeb tshaj yog rau cov menyuam mos, lawv txoj kev loj hlob ntawm lub cev yug me nyuam yuav raug cuam tshuam, ua rau muaj cov kab mob ntsig txog lub cev yug me nyuam. Tib lub sijhawm, BPA kuj tseem tuaj yeem ua rau tsis kam insulin, ua rau muaj teeb meem kev noj qab haus huv xws li ntshav qab zib ntau thiab rog dhau. Qee qhov kev sim tsiaj tau qhia tias cov tsiaj sim uas raug BPA ntev ntev muaj kev loj hlob ntawm lub cev yug me nyuam tsis zoo thiab kev hloov pauv tus cwj pwm. Txawm hais tias kev tshawb fawb txog kev cuam tshuam ntawm BPA rau tib neeg kev noj qab haus huv tseem tab tom ua, ntau lub tebchaws tau siv cov kev ntsuas los txwv tsis pub siv BPA hauv cov khoom tshwj xeeb vim muaj kev txhawj xeeb txog kev pheej hmoo kev noj qab haus huv.
Kev Pib Ua Lag Luam thiab Kev Txhim Kho Kev Ua Raws Cai: Vim muaj kev tsis sib haum xeeb txog kev nyab xeeb ntawm BPA, ntau lub tebchaws thiab thaj chaw thoob plaws ntiaj teb tau tsim cov cai tswjfwm kom txwv tsis pub siv BPA. Xyoo 2011, Tuam Tshoj Lub Tsev Haujlwm Saib Xyuas Kev Noj Qab Haus Huv thiab lwm rau lub chaw haujlwm tau tshaj tawm txwv tsis pub siv BPA hauv kev tsim khoom, kev xa khoom, thiab kev muag khoom ntawm cov fwj mis rau menyuam yaus. Cov tebchaws thiab thaj chaw xws li Tebchaws Meskas, Canada, thiab European Union kuj tau txwv tsis pub siv BPA hauv kev ntim khoom noj, cov khoom rau menyuam yaus, thiab lwm yam. Vim muaj cov kev cai tswjfwm no, kev lag luam tab tom tshawb nrhiav lwm txoj hauv kev rau BPA, xws li bisphenol S (BPS) thiab diphenyl sulfone. Tib lub sijhawm, cov tuam txhab tsim khoom pheej yig txhim kho cov txheej txheem tsim khoom thiab txhawb nqa kev tswj hwm zoo kom txo qhov kev hloov pauv ntawm BPA thiab ua tau raws li cov qauv kev cai tswjfwm nruj dua thiab cov neeg siv khoom xav tau rau kev nyab xeeb ntawm cov khoom ntawm qhov kev ntseeg siab ntawm kev ua haujlwm ntawm cov khoom. Hauv cov txheej txheem tsim khoom ntawm polycarbonate thiab epoxy resins, cov tuam txhab txhim kho tus nqi hloov pauv ntawm BPA thiab txo cov BPA tsis muaj zog hauv cov khoom los ntawm kev txhim kho cov xwm txheej tshuaj tiv thaiv thiab txhim kho cov txheej txheem catalyst.
Cov Lus Qhia Tshwj Xeeb
| Lub Npe Khoom | Bisphenol A | |||||||||
| Cov Qauv Tshuaj | C₁₅H₁₆O₂ | |||||||||
| Qhov Hnyav Molecular | 228.29 g/mol | |||||||||
| Qhov tsos | Dawb crystalline hmoov | |||||||||
| Qhov Kub Yaj | 155–158°C | |||||||||
| Kub Kub | 250–252°C | |||||||||
| CAS TSIS MUAJ | 80-05-7 | |||||||||
| Tus lej HS | 29072990 | |||||||||
| EINECS TSIS MUAJ | 201-240-4 | |||||||||
| Daim Ntawv Thov | Ua cov tshuaj plasticizers, cov tshuaj tiv thaiv hluav taws, cov tshuaj; siv rau hauv cov txheej txheem / nplaum. | |||||||||
Daim Ntawv Tswj Xyuas Zoo
| Lub Npe Khoom | Bisphenol A | ||||||
| YAM KHOOM | TUS NQI TXUJ CI (%) | TUS NQI XEEM (%) | |||||
| Bisphenol A Purity wt. | Yam tsawg kawg nkaus 99.85 | 99.93 | |||||
| Xim APHA | Max 5 | 5 | |||||
| Phenol mg/kg | Siab tshaj 100 | 56 | |||||
| Dawb phenol wt. % | Siab tshaj 1000 | 230 | |||||
| Qhov hnyav dej % | Siab tshaj plaws 0.1 | 0.03 | |||||
| Tshauv mg/kg | Max 5 | 0 | |||||
| Hlau mg/kg | Siab tshaj plaws 0.1 | 0.03 | |||||
Vim li cas ho xaiv peb cov BPA?
Peb cog lus tias yuav muab cov khoom BPA zoo thiab ruaj khov. Txhua qhov txuas los ntawm kev yuav khoom siv raw mus rau kev tsim khoom thiab kev ua tiav ua raws li cov txheej txheem tswj hwm zoo kom ntseeg tau tias cov khoom muaj kev ntshiab siab, tsis muaj cov khoom tsis huv, thiab txhua yam ntsuas tau raws li cov qauv kev lag luam siab. Peb muaj pab pawg R & D kws tshaj lij uas tuaj yeem muab cov kev daws teeb meem raws li cov neeg siv khoom xav tau sib txawv los pab cov neeg siv khoom ua tiav kev tsim kho tshiab thiab kev txhim kho hauv cov teb xws li yas, resins, thiab cov tshuaj zoo. Tib lub sijhawm, peb muaj peev xwm tswj hwm cov khoom xa tuaj kom ntseeg tau tias cov khoom xa tuaj raws sijhawm thiab ruaj khov kom tau raws li cov neeg siv khoom xav tau ntau lawm. Hauv keeb kwm yav dhau los ntawm kev lag luam ntawm BPA kev nyab xeeb kev tsis sib haum xeeb, peb mob siab rau kev tswj hwm kev cai lij choj, pheej nqis peev rau R & D cov peev txheej, thiab txhawb kev txhim kho ntsuab thiab kev nyab xeeb ntawm cov txheej txheem tsim khoom kom muab cov neeg siv khoom nrog cov khoom ua raws li thiab txhim khu kev qha.
Xaiv peb cov BPA, koom tes ua kom muaj kev sib tw tas mus li hauv kev ua cov ntaub ntawv ua tau zoo, ntsib cov teeb meem, thiab tsim kom muaj txiaj ntsig zoo dua.