Walxaha ceeriin ee Cellulose Ether
Habka wax soo saarka ee saxarka viscosity sare ee ether cellulose ayaa la darsay. Qodobbada ugu muhiimsan ee saameeya karinta iyo bleaching ee habka wax soo saarka saxarka viscosity-sare ayaa laga wada hadlay. Marka loo eego shuruudaha macaamiisha, iyada oo loo marayo tijaabada hal-abuurka iyo habka tijaabada orthogonal, oo ay weheliso awoodda qalabka dhabta ah ee shirkadda, cabbirrada habka wax soo saarka ee viscosity saresuuf la safeeyeysaxarka alaabta ceeriinee ether cellulose waa la go'aamiyay. Isticmaalka habkan wax soo saarka, cadaanka ah ee viscosity-sarela safeeyeysaxarka suufka ah ee loo soo saaro ether cellulose waa≥85%, iyo viscosity waa≥1800 ml/g.
Erayada muhiimka ah: saxarka viscosity sare ee ether cellulose; habka wax soo saarka; karinta; bleaching
Cellulose waa isku-xidhka polymer-ka dabiiciga ah ee ugu badan uguna la cusboonaysiin karo. Waxay leedahay ilo kala duwan, qiimo jaban, iyo deegaanka saaxiibtinimo. Taxanayaal ka-soo-saar cellulose ah ayaa lagu heli karaa iyada oo loo marayo hagaajinta kiimikada. Eter cellulose waa unug polymer kaas oo hydrogen-ka ku jira kooxda hydroxyl ee unugga gulukooska cellulose lagu beddelay koox hydrocarbon ah. Etherification ka dib, cellulose waxay ku milmaysaa biyaha, milo xalalka alkali iyo dareeraha organic, oo leh heerkulbeeg. Shiinaha waa wax soo saarka iyo macaamiisha ugu weyn adduunka ee ether-ka cellulose, iyadoo celcelis ahaan heerka kobaca sanadlaha ah in ka badan 20%. Waxaa jira noocyo badan oo ethers cellulose ah oo leh waxqabad aad u fiican, waxaana si weyn loogu isticmaalaa dhismaha, sibidhka, batroolka, cuntada, dharka, saabuunta, rinjiga, daawada, waraaqaha iyo qaybaha elektaroonigga ah iyo warshadaha kale.
Iyada oo horumarka degdega ah ee berrinka laga soo saaro sida ether cellulose, baahida alaabta ceeriin ee wax soo saarkeeda ayaa sidoo kale sii kordheysa. Waxyaabaha ugu muhiimsan ee wax soo saarka ether-ka cellulose waxaa ka mid ah suufka suufka, saxarka alwaax, bamboo, iwm, waxaa ka mid ah, suufku waa badeecada dabiiciga ah ee ugu sareysa maadada cellulose ee dabiiciga ah, dalkayguna waa waddan weyn oo soo saara cudbi, sidaas darteed saxarka suufku waa. alaabta ceeriin ugu fiican ee wax soo saarka ether cellulose. Qalab gaar ah oo shisheeye ah oo si gaar ah loo soo bandhigay oo loogu talagalay wax soo saarka cellulose gaar ah, waxay qabataa heerkulka hoose ee alkali-karinta, tignoolajiyada wax-soo-saarka joogtada ah ee cagaarka, xakamaynta si buuxda ee habka wax-soo-saarka, saxnaanta xakamaynta habka ayaa gaadhay heerka sare ee warshadaha isku midka ah ee gudaha iyo dibaddaba. . Codsiga macaamiisha gudaha iyo dibaddaba, shirkaddu waxay samaysay cilmi-baaris iyo tijaabooyin horumarineed oo ku saabsan saxarka suufka sare ee viscosity ee ether-ka cellulose, muunadaha ayaa si fiican u qaabilay macaamiisha.
1. Tijaabi
1.1 Qalabka ceeriin
Hilibka viscosity-ga sare ee ether-ka cellulose wuxuu u baahan yahay inuu buuxiyo shuruudaha cadaanka sare, mawqifka sare iyo boodhka hooseeya. Marka la eego sifooyinka suufka sare ee viscosity saxarka ether-ka cellulose, marka hore, xakamayn adag ayaa lagu sameeyay xulashada alaabta ceeriin, iyo suufka suufka leh ee qaan-gaarnimada sare, viscosity sare, aan lahayn saddex-filament, iyo abuur yar oo suuf ah. Nuxurka hull waxa loo doortay alaab cayriin ah. Marka loo eego suufka kor ku xusan Marka loo eego shuruudaha tilmaamayaasha kala duwan, waxaa la go'aamiyay in la isticmaalo suufka suufka ah ee Xinjiang sida alaabta ceeriin ee soo saarista saxarka sare ee viscosity ee ether cellulose. Tilmaamayaasha tayada ee Xinjiang cashmere waa: viscosity≥2000 ml/g, bisayl≥70%, sulfuric acid walxo aan milmi karin≤6.0%, ka kooban dambaska≤1.7%.
1.2 Qalabka iyo daawooyinka
Qalabka tijaabada ah: PL-100 dheriga wax lagu karsado ee korantada (Chengyang Taisite Qalabka Tijaabada Co., Ltd.), Qalabka qubeyska heerkulka joogtada ah ee biyaha (Warshada Foornada Korontada ee Longkou), PHSJ 3F mitirka saxda ah ee pH (Shanghai Yidian Scientific Instrument Co., Ltd.), Viscometer-ka capillary, WSB~2 mitir oo caddaan ah (Jinan Sanquan Zhongshishi
Qalabka Shaybaadhka Co., Ltd.).
Daawooyinka tijaabada ah: NaOH, HCl, NaClO, H2O2, NaSiO3.
1.3 Habka loo maro
suufka suufka ah→karinta alkali→dhaqid→garaacid→bleaching (ay ku jirto daawaynta aashitada)→saxarka samaynta→alaabta dhammaatay→baaritaanka index
1.4 Waxyaabaha tijaabada ah
Habka karinta wuxuu ku salaysan yahay habka wax soo saarka dhabta ah, iyadoo la adeegsanayo diyaarinta walxaha qoyan iyo hababka karinta alkaline. Si fudud u nadiifi oo ka saar caarada suufka ee tirada leh, ku dar liinta la xisaabiyay iyadoo loo eegayo saamiga dareeraha ah iyo cadadka alkali ee la isticmaalay, si buuxda u qas suufka iyo suufka, ku rid haanta wax lagu kariyo, oo ku kari si waafaqsan heerkulka cunto karinta iyo waqtiyada haynta. Kari Saxarka ka dib karinta waa la dhaqaa, la garaacaa oo la nadiifiyaa si hadhow loo isticmaalo.
Habka bleaching: cabbirada sida fiirsashada saxarka iyo qiimaha pH si toos ah ayaa loo doortaa iyadoo loo eegayo awoodda dhabta ah ee qalabka iyo hab-dhaqanka biliijka, iyo cabbirrada la xidhiidha sida cadadka wakiilka biliijka ayaa lagaga dooday tijaabooyin.
Bleaching waxa loo qaybiyaa saddex marxaladood: (1) Caadiga ah ee ka hor chlorination bleaching, ku hagaaji feejignaanta saxarka ilaa 3%, ku dar aashito si aad u xakamayso qiimaha pH ee saxarka ilaa 2.2-2.3, ku dar qadar go'an oo ah sodium hypochlorite si aad u caddayso heerkulka qolka 40 daqiiqo. (2) Qaybta Hydrogen peroxide bleaching, hagaajinta fiirsashada saxarka si ay u noqoto 8%, ku dar sodium hydroxide si alkalinize slurry, ku dar hydrogen peroxide oo samee bleaching heerkul gaar ah (qaybta hydrogen peroxide bleaching waxay ku daraysaa qadar go'an oo ah xasiliyaha sodium silicate). Heerkulka bleaching ee gaarka ah, qiyaasta hydrogen peroxide iyo wakhtiga biliijka ayaa lagu sahamiyay tijaabooyin. (3) Qaybta daawaynta aysiidhka: hagaajinta fiirsashada saxarka ilaa 6%, ku dar aashitada iyo birta ion kaaliyeyaasha loogu talagalay daawaynta aashitada, habka qaybtan waxaa loo fuliyaa iyadoo loo eegayo habka caadiga ah ee soosaarka saxarka suufka ee gaarka ah ee shirkadda, iyo habka gaarka ah ayaa sameeya. looma baahna in si tijaabo ah looga hadlo.
Inta lagu jiro habka tijaabada, heer kasta oo biliijku wuxuu hagaajiyaa diiradda saxarka iyo pH, wuxuu ku darayaa qayb go'an oo ah reagent bleaching, wuxuu isku daraa saxarka iyo reagement bleaching si siman bac caag ah oo polyetylen ah oo la shaabadeeyey, wuxuuna geliyaa qubeyska heerkulka joogtada ah heerkulka joogtada ah. bleaching muddo cayiman. Habka bleaching Ka soo saar dareeraha dhexdhexaadka ah 10kii daqiiqoba mar, isku qas oo si siman u cajii si aad u hubiso isku mid ahaanshaha biliijka. Marxalad kasta oo bleaching ah ka dib, waxaa lagu dhaqaa biyo, ka dibna waxay u gudubtaa heerka xiga ee bleaching.
1.5 Falanqaynta iyo ogaanshaha slurry
GB/T8940.2-2002 iyo GB/T7974-2002 ayaa loo isticmaalay diyaarinta iyo cabbiraadda cadaanka ee shaybaarrada slurry caddaynta siday u kala horreeyaan; GB/T1548-2004 ayaa loo isticmaalay cabbirka viscosity-ka.
2. Natiijooyinka iyo doodaha
2.1 Falanqaynta yoolka
Marka loo eego baahida macaamiisha, tilmaamayaasha ugu muhiimsan ee farsamada ee saxarka sare ee viscosity ee ether cellulose waa: caddaan≥85%, viscosity≥1800 ml/g,α-cellulose≥90%, ka kooban dambaska≤0.1%, birta≤12 mg / kg iwm Sida laga soo xigtay sannado badan oo waayo-aragnimo ah ee shirkadda ee soo saarista saxarka suufka gaarka ah, iyada oo la xakameynayo xaaladaha karinta ku habboon, dhaqidda iyo xaaladaha daaweynta acid ee habka bleaching,α-cellulose, ash, macdanta birta iyo tilmaamayaasha kale, way fududahay in la buuxiyo shuruudaha wax soo saarka dhabta ah. Sidaa darteed, caddaanka iyo viscosity-ka ayaa loo qaataa inay yihiin diiradda horumarkan tijaabada ah.
2.2 Habka karinta
Habka karinta waa in la burburiyo derbiga asaasiga ah ee fiber-ka leh sodium hydroxide hoostiisa heerkul iyo cadaadis gaar ah oo karinta, si biyaha-milmi kara iyo alkali-soluble aan cellulose wasakh ah, baruurta iyo dhuka ku jira suufka waa milmaan, iyo nuxurkaα-cellulose ayaa kordhay. . Sababtoo ah kala-goynta silsiladaha macromolecular cellulose inta lagu guda jiro habka karinta, heerka polymerization waa la dhimay iyo viscosity waa la dhimay. Haddii heerka karinta uu aad u fudud yahay, saxarka si fiican looma karin doono, bleaching ku xiga ayaa ahaan doona mid liita, tayada alaabtuna waxay noqon doontaa mid aan degganayn; haddii heerka cunto karintu aad u culus tahay, silsiladaha unugyadu waxay si xoog leh u baabi'in doonaan, viscosity-kuna aad buu u hooseeyaa. Iyadoo si buuxda loo tixgalinayo shuruudaha tusaha bleachability iyo viscosity ee slurry, waxaa la go'aamiyay in viscosity of slurry ka dib karinta waa.≥1900 mL/g, iyo caddaanku waa≥55%.
Marka loo eego qodobbada ugu muhiimsan ee saameeya saamaynta karinta: qadarka alkali ee loo isticmaalo, heerkulka karinta, iyo wakhtiga haynta, habka tijaabada orthogonal waxaa loo isticmaalaa in lagu sameeyo tijaabooyin si loo doorto xaaladaha habka karinta ee ku habboon.
Marka loo eego xogta aadka u liidata ee natiijooyinka baaritaanka orthogonal, saameynta saddexda arrimood ee saameynta karinta waa sida soo socota: heerkulka karinta> qadarka alkali> waqtiga haynta. Heerkulka karinta iyo qadarka alkali waxay saameyn weyn ku leeyihiin viscosity iyo cadaanka saxarka suufka. Kordhinta heerkulka karinta iyo qadarka alkali, caddaanku waxay u egtahay inay korodho, laakiin viscosity waxay u egtahay inay hoos u dhacdo. Si loo soo saaro saxarka viscosity-sare, xaaladaha karinta dhexdhexaadka ah waa in la qaataa inta ugu badan ee suurtogalka ah iyada oo la hubinayo caddaanka. Sidaa darteed, marka lagu daro xogta tijaabada ah, heerkulka karinta waa 115°C, iyo cadadka alkali ee la isticmaalo waa 9%. Saamaynta waqtiga haynta ee saddexda arrimood ayaa aad uga daciifsan labada arrimood ee kale. Maaddaama karintani ay qaadato habka karinta-alkali-hoose iyo heerkulka hooseeya, si loo kordhiyo isku midka ah ee karinta oo loo hubiyo xasilloonida cuncunka karinta, wakhtiga haynta ayaa loo doortaa 70 daqiiqo. Sidaa darteed, isku-darka A2B2C3 ayaa la go'aamiyay inuu noqdo habka ugu wanaagsan ee wax lagu kariyo ee saxarka-mugdiga sarreeya. Marka la eego xaaladaha habka wax soo saarka, cadaanka saxarka ugu dambeeya wuxuu ahaa 55.3%, iyo viscosity wuxuu ahaa 1945 mL / g.
2.3 Habka bleaching
2.3.1 Habka koloriinta ka hor
Qaybta hore ee koloriinaynta, xaddi aad u yar oo sodium hypochlorite ah ayaa lagu daraa saxarka suufka si lignin ku jira saxarka suufka loogu beddelo lignin koloriin leh oo la milmo. Ka dib marka la caddeeyo marxaladda ka hor chlorination, viscosity of slurry waa in la xakameeyaa si ay u noqoto.≥1850 ml/g, iyo cadaanka≥63%.
Qadarka sodium hypochlorite waa qodobka ugu muhiimsan ee saameeya saamaynta biliijka ee qaybtan. Si loo sahamiyo qaddarka ku habboon ee koloriinta la heli karo, habka tijaabada halbeegga ah ayaa la isticmaalay si loo sameeyo 5 tijaabo oo isbarbar socda isla waqti isku mid ah. Marka lagu daro xaddi kala duwan oo sodium hypochlorite ah ee dareeraha, koloriinta waxtarka leh ee ku jirta slurry Maadada koloriintu waxay ahayd 0.01 g/L, 0.02 g/L, 0.03 g/L, 0.04 g/L, 0.05 g/L siday u kala horreeyaan. bleaching ka dib, viscosity iyo BaiDu.
Laga soo bilaabo isbeddelada saxarka suufka ah ee caddaanka iyo viscosity ee qadarka koloriin ee la heli karo, waxaa la ogaan karaa in kororka koloriinta la heli karo, cadaanka saxarka suufka ayaa si tartiib tartiib ah u kordheysa, iyo viscosity si tartiib tartiib ah ayaa hoos u dhacaya. Marka cadadka koloriinta la heli karo ay tahay 0.01g/L iyo 0.02g/L, cadaanka saxarka suufka waa≤63%; marka qadarka koloriin ee la heli karo uu yahay 0.05g/L, viscosity saxarka suufku waa≤1850ml/g, kaas oo aan buuxin shuruudihii looga baahnaa koloriinta kahor. Shuruudaha tilmaamayaasha xakamaynta biliijing qaybta. Marka qadarka koloriin ee la heli karo uu yahay 0.03g/L iyo 0.04g/L, tilmaamayaasha biliijka ka dib waa viscosity 1885mL/g, cadaanka 63.5% iyo viscosity 1854mL/g, cadaanka 64.8%. Qiyaasta qiyaasta waxay la socotaa shuruudaha tilmaamayaasha xakamaynta biliijka ee qaybta hore ee koloriinta, markaa waxaa horudhac loo go'aamiyay in qiyaasta koloriin ee la heli karo ee qaybtan ay tahay 0.03-0.04g/L.
2.3.2 Baadhista habka biliijka ee hydrogen peroxide
biliijing Hydrogen peroxide waa heerka ugu muhiimsan ee bleaching ee habka warantiran si loo hagaajiyo caddaanka. Marxaladdan ka dib, marxalad daawaynta aashitada ayaa la sameeyaa si loo dhamaystiro habka warankiilada. Marxaladda daawaynta aysiidhka oo ay weheliso warqad-samaynta iyo samaynta dambe ee soo socota wax saamayn ah kuma yeelanayso viscosity ee saxarka, waxaanay kordhin kartaa caddaanka ugu yaraan 2%. Sidaa darteed, marka loo eego shuruudaha index kontoroolka ee saxarka ugu dambeeya ee viscosity-ga sare, shuruudaha xakamaynta tusaha ee marxaladda bleaching hydrogen peroxide waxaa lagu go'aamiyaa inay noqdaan viscosity.≥1800 mL/g iyo caddaan≥83%.
Waxyaabaha ugu muhiimsan ee saameeya hydrogen peroxide bleaching waa qadarka hydrogen peroxide, heerkulka bleaching, iyo wakhtiga bleaching. Si loo gaaro shuruudaha cadaanka iyo viscosity ee saxarka sare ee viscosity, saddexda arrimood ee saameeya saamaynta bleaching waxaa lagu falanqeeyay habka tijaabada orthogonal si loo go'aamiyo cabbirada habka bleaching ee ku habboon hydrogen peroxide.
Iyada oo loo marayo xogta farqiga aadka u daran ee baaritaanka orthogonal, waxaa la ogaaday in saameynta saddexda arrimood ee saameynta bleaching ay tahay: heerkulka bleaching> qiyaasta hydrogen peroxide> wakhtiga bleaching. Heerkulka bleaching iyo cadadka hydrogen peroxide ayaa ah arrimaha ugu waaweyn ee saameeya saamaynta biliijka. Marka ay si tartiib tartiib ah u korodho xogta labada arrimood ee heerkulka bleaching iyo qadarka hydrogen peroxide, cadaanka saxarka suufka ayaa si tartiib tartiib ah u kordhaya, iyo viscosity si tartiib tartiib ah ayaa hoos u dhacaya. Iyadoo la tixgelinayo qiimaha wax-soo-saarka, awoodda qalabka iyo tayada alaabta si dhammaystiran, heerkulka nadiifinta hydrogen peroxide waxaa lagu go'aamiyaa inuu noqdo 80°C, iyo qiyaasta hydrogen peroxide waa 5%. Isla mar ahaantaana, marka loo eego natiijooyinka tijaabada ah, wakhtiga bleaching ee hydrogen peroxide ayaa saameyn yar ku leh saameynta bleaching, iyo wakhtiga bleaching-hal-hal ah ee hydrogen peroxide waxaa loo doortaa 80 daqiiqo.
Marka loo eego habka loo xushay ee hydrogen peroxide habka nadiifinta, shaybaarku wuxuu sameeyay tiro badan oo tijaabo xaqiijin ah oo soo noqnoqda, natiijooyinka tijaabada ah waxay muujinayaan in cabbirada tijaabada ah ay buuxin karaan shuruudaha bartilmaameedka ah.
3. Gabagabo
Marka loo eego shuruudaha macaamiisha, iyada oo loo marayo imtixaan hal qodob ah iyo tijaabada orthogonal, oo ay weheliso awoodda qalabka dhabta ah ee shirkadda iyo kharashka wax soo saarka, cabbirada habka wax soo saarka ee saxarka sare ee ether-ka cellulose waxaa lagu go'aamiyaa sida soo socota: (1) Habka karinta: isticmaal 9 % alkali, kariyo Heerkulku waa 115°C, iyo waqtiga haynta waa 70 daqiiqo. (2) Habka bleaching: qaybta hore ee koloriinta, qiyaasta koloriinta la heli karo ee warankiilada waa 0.03-0.04 g/L; Qaybta hydrogen peroxide, heerkulka bleaching waa 80°C, qiyaasta hydrogen peroxide waa 5%, iyo waqtiga warankiiladu waa 80 daqiiqo; Qaybta daawaynta aysiidhka, iyadoo loo eegayo nidaamka caadiga ah ee shirkadda.
Saxarka viscosity sare eeether cellulosewaa saxarka suufka gaarka ah oo leh codsi ballaadhan iyo qiime sare oo lagu daray. Iyada oo ku saleysan tiro badan oo tijaabo ah, shirkaddu waxay si madax-bannaan u horumarisay habka wax soo saarka ee saxarka sare ee viscosity ether cellulose. Waqtigan xaadirka ah, saxarka viscosity-ga sarreeya ee ether-ka cellulose wuxuu noqday mid ka mid ah noocyada ugu muhiimsan ee wax soo saarka shirkadda Kima Chemical, iyo tayada wax soo saarka ayaa si wadajir ah loo aqoonsaday oo ammaanay macaamiisha gudaha iyo dibadda.
Waqtiga boostada: Jan-11-2023