Iindaba
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I-bisphenol A BPA ishwankathelwa njani?
Isishwankathelo seBisphenol A BPA Yaqala ukuveliswa ngo-1936 njenge-estrogen yokwenziwa, i-bisphenol A (BPA) ngoku yenziwa ngomthamo wonyaka odlula iibhiliyoni ezi-6 zeepawundi. I-Bisphenol A BPA isetyenziswa kakhulu njengebhloko yokwakha iiplastiki ze-polycarbonate, ezifumaneka kwiimveliso ezifana ne-baby b...Funda ngokugqithisileyo -
Ziziphi iindlela ezisetyenziswa ngayo i-bisphenol A?
Iipolycarbonate kunye nee-epoxy resins. Ikwasetyenziswa ekwenzeni iiplastiki zobunjineli eziphambili ezifana ne-polysulfone, kunye ne-tetrabromobisphenol A, esetyenziswa kakhulu njenge-larm retardant. I-Polycarbonate (eyona mthengi mkhulu we-bisphenol A) ayinancasa, ayinavumba, ayinatyhefu, kwaye...Funda ngokugqithisileyo -
Yintoni i-bisphenol a bpa esetyenziselwa yona?
I-Bisphenol a bpa isetyenziswa kakhulu kwimveliso yezinto ezahlukeneyo zepolymer, ezifana nee-epoxy resins, ii-polycarbonates, ii-polysulfones, ii-phenolic unsaturated resins, ii-polyphenylene ether resins, ii-polyaryl compounds, ii-polyetherimides, ii-tetrabromobisphenol A, iziqinisi zobushushu ze-PVC, ii-antioxidants zerabha,...Funda ngokugqithisileyo -
Yintoni iqondo lokubila le-bisphenol?
I-Bisphenol A (BPA), ekwaziwa ngokuba yi-diphenylolpropane okanye (4-hydroxyphenyl)propane, yenza iikristale ze-prismatic kwi-dilute ethanol kunye neekristale ezifana nenaliti emanzini. Iyatsha kwaye inevumba eliphantsi le-phenolic. Iqondo layo lokunyibilika yi-157.2°C, i-flash point yi-79.4°C, kwaye iqondo lokubila le-bisphenol a yi-2...Funda ngokugqithisileyo -
Yintoni iBisphenol A?
Ulwazi oluSisiseko lweBisphenol A (bpa) IBisphenol A, ekwaziwa ngokuba yiBPA, yikhompawundi yendalo enefomula yemolekyuli C₁₅H₁₆O₂. Kwimizi-mveliso, isetyenziswa ekuveliseni izinto ezifana ne-polycarbonate (PC) kunye ne-epoxy resins. Ukususela ngeminyaka yoo-1960, iBPA ibisetyenziswa ekuveliseni iplast...Funda ngokugqithisileyo -
Uyisebenzisa njani i-sodium hydrosulfite color remover?
Indlela Yokususa Amabala Kwimpahla Emhlophe Indlela Yokuntywila Indebe Yesodium hydrosulfite Ukuba kukho amabala akwindawo ethile, sebenzisa indebe enesidanga sokuntywila. Galela amanzi ashushu athile (angaphezulu kwama-90°C) kwindebe. Yongeza i-sodium hydrosulfite (uxinzelelo olumalunga ne-2.5%) kwaye uvuselele ukuze inyibilike. Gcoba...Funda ngokugqithisileyo -
Ziziphi iindlela zokuba khona kwe-sodium dithionite?
Iipropati Zomzimba: I-Sodium dithionite ihlelwa njengesixhobo esivuthayo seBanga loku-1. Ikwaziwa njengeRongalite. Ngokwezorhwebo, ikhona ngeendlela ezimbini: i-Na₂S₂O₄·2H₂O kunye ne-Na₂S₂O₄ engenamanzi. Eyokuqala yikristale emhlophe entle, ngelixa eyesibini ingumgubo otyheli okhanyayo. Ubuninzi bayo bu...Funda ngokugqithisileyo -
Iarhente yokunciphisa: iSodium Hydrosulfite
Iarhente Yokunciphisa: I-Sodium Hydrosulfite Igama leKhemikhali: I-Sodium dithionite. Xa ithelekiswa nee-oxidizing agents, i-sodium hydrosulfite ayibangeli monakalo mkhulu kakhulu kwilaphu. Ingasetyenziswa kwilaphu ezenziwe ngeefayibha ezahlukeneyo ngaphandle kokubangela monakalo, yiyo loo nto igama elithi "hydrosulfite" (elithetha ukhuseleko lwayo)....Funda ngokugqithisileyo -
Iyintoni indima ye-sodium hydrosulfite kwimicu yelaphu?
IiFibers ezifanelekileyo ze-sodium hydrosulfite I-sodium hydrosulfite ifanelekile kwiifayibha ezahlukeneyo zelaphu, yiyo loo nto ibizwa ngokuba yi "Rongalite." Xa isetyenziselwa ukumhlopheza okanye ukususa amabala kubushushu obuphezulu, iifayibha zelaphu kufuneka zikwazi ukumelana namaqondo obushushu aphezulu ngaphandle kokonakala. Ngokwesiqinisekiso...Funda ngokugqithisileyo -
Ziziphi iingozi ze-sodium hydrosulfite?
I-sodium hydrosulfite inetyhefu kwaye inokucaphukisa amehlo kunye ne-mucosa yendlela yokuphefumla. Isetyenziswa kakhulu kwishishini leempahla zelaphu ukunciphisa ukudaya, ukunciphisa ukucoca, ukuprinta, ukususa umbala, kunye nokumhlophelisa isilika, uboya, i-nylon, kunye nezinye izinto ezilahlwayo. Njengoko ingenazo iintsimbi ezinzima, izinto ezilahlwayo ziyamhlophe...Funda ngokugqithisileyo -
Kuza kwenzeka ntoni ukuba i-sodium hydrosulfite ivezwa emoyeni?
Xa ibekwe emoyeni, i-sodium hydrosulfite ifunxa ioksijini ngokulula kwaye i-oxidize. Ikwafunxa umswakama, ivelise ubushushu kwaye ikhokelele ekuwohlokeni. Ingahlangana kunye ngelixa ifunxa ioksijini esemoyeni kwaye ikhuphe ivumba elibi le-asidi. I-Na₂S₂O₄ + 2H₂O + O₂ → 2NaHSO₄ + 2[H] Ukufudumeza okanye ukuvezwa...Funda ngokugqithisileyo -
Zithini iipropati zomzimba ze-sodium hydrosulfite?
I-Sodium hydrosulfite Iipropati Zomzimba I-Sodium hydrosulfite ihlelwa njengesixhobo esivuthayo esichaphazela umswakama seBakala 1, esaziwa ngokuba yi-sodium dithionite. Ifumaneka kwiindlela ezimbini: i-hydrated (Na₂S₂O₄·2H₂O) kunye ne-anhydrous (Na₂S₂O₄). Imo e-hydrated ibonakala njenge-cryst emhlophe ecolekileyo...Funda ngokugqithisileyo