Samaynta waraaqaha Bamboo ee Shiinaha waxay leedahay taariikh dheer. Qaab-dhismeedka fiber Bamboo iyo ka kooban kiimiko waxay leeyihiin astaamo gaar ah. Celceliska dhererka fiberku waa dheer yahay, iyo qaab-dhismeedka microstructure ee gidaarka unugyada fiber-ka ayaa ah mid gaar ah, garaaca xoogga waxqabadka horumarinta saxarka waa mid wanaagsan, siinta saxarka bleached sifooyinka wanaagsan ee muuqaalka: opacity sare iyo isugeynta iftiinka iftiinka. Maaddada lignin ee bamboo ceyriin ah (qiyaastii 23% ilaa 32%) ayaa ka sarreeya, iyada oo la go'aaminayo cunto karinta saxarka leh alkali sare iyo sulfide (sulfide guud ahaan 20% ilaa 25%), oo u dhow alwaax coniferous; Maaddooyinka cayriin, hemicellulose iyo silikoon ayaa ka sarreeya, laakiin sidoo kale dhaqidda saxarka, uumiga khamriga madow iyo nidaamka qalabka xoojinta hawlgalka caadiga ah ayaa keenay xoogaa dhibaatooyin ah. Si kastaba ha ahaatee, alaabta ceeriin ee bamboo maaha wax ceeriin ah oo ku fiican samaynta warqadda.
Mustaqbalka bamboo dhexdhexaad ah iyo nidaamka bleaching saxarka saxarka kiimikada ee baaxadda weyn, asal ahaan isticmaali doona habka bleaching TCF ama ECF. Guud ahaan, marka lagu daro qoto dheer ee delignification iyo ogsijiin deligation of pulping, isticmaalka TCF ama ECF technology bleaching, marka loo eego tirada qaybaha bleaching kala duwan, saxarka bamboo la bleached karaa ilaa 88% ~ 90% ISO caddaan.
Isbarbardhigga bamboo ECF iyo TCF bleaching
Sababtoo ah maaddada sare ee lignin ee bamboo, waxay u baahan tahay in lagu daro teknoolojiyadda si qoto dheer u iftiiminaya iyo teknoolojiyadda nadiifinta oksijiinta si loo xakameeyo qiimaha Kappa ee slurry gelaya ECF iyo TCF (waxaa lagu talinayaa <10), iyadoo la adeegsanayo Eop laba-marxalad bleaching ECF. pretreatment ama Eop laba marxaladood oo isku xigxiga TCF bleaching, kuwaas oo dhamaantood warankiilin kara saxarka bambo sulphated ilaa heer cadcad sare 88% ISO.
Waxqabadka bleaching ee alaabta ceeriin ee kala duwan ee bamboo aad ayey u kala duwan tahay, Kappa ilaa 11 ~ 16 ama wax ka badan, xitaa iyadoo leh laba heer oo bleaching ECF iyo TCF, saxarka wuxuu gaari karaa kaliya 79% ilaa 85% heerka cadaanka.
Marka la barbar dhigo saxarka bamboo TCF, ECF saxarka bamboo bleached ayaa leh khasaaraha biliijka yar iyo viscosity sare, kaas oo guud ahaan gaari kara in ka badan 800ml/g. Laakin xitaa TCF casriga casriga ah ee saxarka bamboo bleached, viscosity kaliya wuxuu gaari karaa 700ml/g. ECF iyo TCF tayada saxarka bleached waa xaqiiqo aan la isku hallayn karin, laakiin tixgelinta guud ee tayada saxarka, maalgelinta iyo kharashyada hawlgalka, saxarka bamboo bleaching iyadoo la isticmaalayo ECF bleaching ama TCF bleaching, weli lama soo afjarin. Go'aamiyeyaal ganacsi oo kala duwan ayaa isticmaala habab kala duwan. Laakiin laga bilaabo isbeddelka horumarka mustaqbalka, saxarka bamboo ECF iyo TCF bleaching waxay wada noolaan doonaan muddo dheer.
Taageerayaasha tignoolajiyada bleaching ECF waxay aaminsan yihiin in saxarka bleached ECF uu leeyahay tayada saxarka oo ka sii fiican, iyadoo la adeegsanayo kiimikooyin yar, waxtarka biliijka sare, halka nidaamka qalabku uu yahay mid qaan-gaar ah oo deggan waxqabadka hawlgalka. Si kastaba ha ahaatee, u doodayaasha tignoolajiyada bleaching TCF ayaa ku doodaya in tignoolajiyada bleaching TCF ay leedahay faa'iidooyinka dheecaanka biyaha wasakhda ah ee ka imanaya warshadda bleaching, shuruudaha ka hortagga daxalka oo hooseeya ee qalabka, iyo maalgashiga hooseeya. Sulphate bamboo saxarka TCF-ka-soo-saarka wax-soo-saarka koloriin-la'aanta ah wuxuu qaataa nidaamka bleaching semi-xiran, wasakhaynta biyaha wasakhda ah ee warshadda waxaa lagu xakameyn karaa 5 ilaa 10m3/t saxarka. Biyaha wasakhda ah ee qaybta (PO) ayaa loo diraa qaybta nadiifinta oksijiinta si loogu isticmaalo, iyo biyaha wasakhda ah ee qaybta O waxaa la keenaa qaybta shaandhada lagu dhaqo si loo isticmaalo, ugu dambeyntiina waxay galaan dib u soo kabashada alkali. Sababtoo ah bleaching oo aan lahayn koloriin, kiimikooyinku waa kuwo aan daxal ahayn, qalabka wax lagu nadiifiyo uma baahna in la isticmaalo titanium iyo birta khaaska ah, birta caadiga ah ee aan caadiga ahayn ayaa la isticmaali karaa, markaa kharashka maalgashiga ayaa hooseeya. Marka la barbar dhigo khadka wax soo saarka saxarka TCF, kharashka maalgashiga khadka wax soo saarka saxarka ECF inuu noqdo 20% ilaa 25% ka sarreeya, iyada oo maalgashiga khadka wax soo saarka saxarka uu sidoo kale yahay 10% ilaa 15% sare, maalgashiga nidaamka soo kabashada kiimikada sidoo kale waa ka weyn yahay, iyo Qalliinku waa ka sii adag yahay.
Marka la soo koobo, saxarka bamboo TCF iyo ECF bleaching bleaching of whiteness sare 88% ilaa 90% saxarka bamboo si buuxda ayaa macquul ah. Pulping waa in si qoto dheer loo isticmaalo tignoolajiyada kala saarista, oksijiinta sifaynta ka hor, xakamaynta saxarka nidaamka biliijka qiimaha Kappa, bleaching iyadoo la isticmaalayo habka warankiilo saddex ama afar taxane ah. Soo jeedinta ECF ee isku xigxigta bleaching ee saxarka bamboo waa OD(EOP)D(PO), OD(EOP)DP; L-ECF taxanaha bleaching waa OD(EOP)Q(PO); Isku xigxiga TCF bleaching waa Eop(ZQ)(PO)(PO), O(ZQ)(PO)(ZQ)(PO). Maaddaama halabuurka kiimikada (gaar ahaan maadada lignin) iyo qaab-dhismeedka fiber-ka ay aad ugu kala duwan yihiin noocyada kala duwan ee bamboo, daraasad nidaamsan waa in lagu sameeyaa wax-qabadka pulping iyo waraaqaha ee noocyada kala duwan ee bamboo ka hor inta aan la dhisin geedka si loo bixiyo hagitaan horumarinta macquulka ah. habsocodka waddooyinka iyo xaaladaha.
Waqtiga post: Seb-14-2024
