Soo saarista karboxymethylcellulose (CMC) waxay ku lug leedahay dhowr tillaabo iyo falcelin kiimikaad.CMC waa polymer biyo-milmi leh oo laga soo qaatay cellulose, polymer dabiici ah oo laga helo gidaarada unugyada dhirta.Waxa si weyn looga isticmaalaa warshado kala duwan sida cuntada, daawooyinka, waxyaalaha la isku qurxiyo, iyo dunta sababtoo ah dhumucdeeda, xasilinta, iyo guryaha xidha.Halkan waxaa ah hage faahfaahsan oo ku saabsan sida loo soo saaro karboxymethylcellulose:
Hordhac Carboxymethylcellulose (CMC):
Carboxymethylcellulose (CMC) waa nooc ka mid ah cellulose, oo ah polysaccharide si dabiici ah u dhacda oo laga helo gidaarada unugyada dhirta.Wax soo saarka CMC waxay ku lug leedahay wax ka beddelka cellulose iyada oo loo marayo falcelin kiimikaad si loogu soo bandhigo kooxaha karboxymethyl ee lafta dhabarka cellulose.Beddelkaani waxa uu siiya milanka biyaha iyo waxyaabaha kale ee la jecel yahay ee polymer-ka.
Alaabta ceeriin:
Cellulose: Waxyaabaha ugu muhiimsan ee wax soo saarka CMC waa cellulose.Cellulose waxaa laga heli karaa ilo dabiici ah oo kala duwan sida saxarka alwaax, suufka, ama hadhaaga beeraha.
Sodium Hydroxide (NaOH): Sidoo kale loo yaqaano soodhaha caustic, sodium hydroxide waxaa loo isticmaalaa marxaladaha hore ee wax soo saarka CMC ee daaweynta alkali ee cellulose.
Chloroacetic Acid (ClCH2COOH): Chloroacetic acid waa reagent-ka ugu weyn ee loo isticmaalo in lagu soo bandhigo kooxaha karboxymethyl ee lafta dhabarka cellulose.
Dareen-celinta Etherification: Kataliyeyaasha sida sodium hydroxide ama sodium carbonate ayaa loo isticmaalaa si loo fududeeyo falcelinta etherification ee u dhexeeya cellulose iyo chloroacetic acid.
Xalalka: Xalalka sida isopropanol ama ethanol ayaa laga yaabaa in loo isticmaalo in lagu milo falcelinta iyo caawinta habka falcelinta.
Habka wax soo saarka:
Soo saarista karboxymethylcellulose waxay ku lug leedahay dhowr tillaabo oo muhiim ah:
1. Dawaynta Alkali ee Cellulose:
Cellulose waxaa lagu daaweeyaa alkali xoog leh, sida caadiga ah sodium hydroxide (NaOH), si loo kordhiyo falcelinta iyada oo loo beddelayo qaar ka mid ah kooxaha hydroxyl-ka alkali cellulose.Daaweyntan waxaa badanaa lagu sameeyaa weelka reactor ee heerkul sarreeya.cellulose-ka alkali ah ee la sameeyay ayaa markaa la dhaqaa oo la nadiifiyaa si meesha looga saaro alkali dheeraadka ah.
2. Etherification:
Daawaynta alkali ka dib, cellulose waxaa lagu falceliyaa chloroacetic acid (ClCH2COOH) iyada oo ay jirto kiciye etherification.Dareen-celintani waxay soo bandhigaysaa kooxaha karboxymethyl ee lafta dhabarka cellulose, taasoo keentay samaynta karboxymethylcellulose.Dareen-celinta etherification caadi ahaan waxay ku dhacdaa xaaladaha heerkulka, cadaadiska, iyo pH si loo gaaro heerka la rabo ee beddelka (DS) iyo miisaanka kelli ee CMC.
3. Dhaqidda iyo Nadiifinta:
Ka dib falcelinta etherification-ka, badeecada CMC ee cayriin si fiican ayaa loo dhaqaa si meesha looga saaro reagen-yaasha aan falcelinta lahayn, alaabta ka soo baxda, iyo wasakhda.Dhaqitaanka waxaa badanaa lagu sameeyaa iyadoo la isticmaalayo biyo ama dareere organic ah oo ay ku xigto sifeynta ama centrifugation.Talaabooyinka sifaynta waxa kale oo laga yaabaa inay ku lug lahaadaan daawaynta asiidhyada ama saldhigyada si loo hagaajiyo pH loogana saaro kiciyayaal hadhaaga ah.
4. Qalajinta:
CMC-da la safeeyey ayaa markaa la qalajiyey si looga saaro qoyaanka oo loo helo badeecada ugu dambeysa ee budada ama qaabka granular.Qalajinta sida caadiga ah waxaa lagu fuliyaa iyadoo la adeegsanayo habab ay ka mid yihiin qalajinta buufinta, qalajinta faakuumka, ama qalajinta hawada ee xaaladaha la kantaroolay si looga hortago xaalufka ama sii xumaanshaha polymerka.
Xakamaynta tayada
Tallaabooyinka xakamaynta tayada ayaa lagama maarmaan u ah dhammaan habka wax soo saarka CMC si loo hubiyo joogteynta, nadiifnimada, iyo sifooyinka la doonayo ee alaabta kama dambaysta ah.Halbeegyada tayada muhiimka ah waxaa ka mid ah:
Degree of Beddelka (DS): Celceliska tirada kooxaha karboksymethyl halkii gulukoos ee silsiladda cellulose.
Qaybinta miisaanka molecular: Waxaa lagu go'aamiyaa farsamooyinka sida cabbirada viscosity ama gel permeation chromatography (GPC).
Daahirnimada: Waxaa lagu qiimeeyay hababka gorfaynta sida infrared spectroscopy (IR) ama chromatography dareeraha waxqabadka sare leh (HPLC) si loo ogaado wasakhda.
Viscosity: Waa hanti muhiim u ah codsiyo badan, oo lagu cabiray iyadoo la isticmaalayo viscometers si loo hubiyo joogtaynta iyo waxqabadka.
Codsiyada Carboxymethylcellulose:
Carboxymethylcellulose waxay ka heshaa isticmaalka baahsan ee warshadaha kala duwan, oo ay ku jiraan:
Warshadaha cuntada: Sida dhumuc weyn, xasiliye, iyo emulsifier ee alaabta sida suugada, dhaymada, jalaatada, iyo alaabta la dubay.
Daawooyinka: Qaababka dawooyinka sida xidhe, kala daadsan, iyo wax ka beddelka viscosity ee kiniiniyada, ganaaxyada, iyo qaababka la mariyo.
Waxyaalaha la isku qurxiyo: Alaabooyinka daryeelka shakhsi ahaaneed sida kiriimyada, labeennada, iyo shaambada sida wakiilka dhumuc iyo beddelka rheology.
Dharka: Habka daabacaadda dharka, cabbirka, iyo dhamaystirka si loo hagaajiyo sifooyinka dharka iyo waxqabadka.
Tixgelinta Deegaanka iyo Badbaadada:
Wax soo saarka CMC waxay ku lug leedahay isticmaalka kiimikooyinka iyo hababka tamarta xoogga leh, kuwaas oo laga yaabo inay yeeshaan saameyn deegaanka sida soo saarista biyaha wasakhda ah iyo isticmaalka tamarta.Dadaallada lagu yaraynayo saamaynta deegaanka iyo in la hubiyo in si badbaado leh loo maareeyo kiimikooyinka ayaa ah tixgalin muhiim ah xagga wax-soo-saarka CMC.Hirgelinta hababka ugu wanaagsan ee daaweynta qashinka, waxtarka tamarta, iyo caafimaadka iyo badbaadada shaqada ayaa kaa caawin kara yaraynta walaacyadan.
Soo saarista karboxymethylcellulose waxay ku lug leedahay dhowr tillaabo oo ka bilaabmaya soo saarista cellulose ilaa daaweynta alkali, nadiifinta, nadiifinta, iyo qalajinta.Tallaabooyinka xakamaynta tayada ayaa muhiim u ah hubinta joogteynta iyo nadiifinta badeecada ugu dambeysa, taas oo ka heleysa codsiyo ballaaran oo ku saabsan warshadaha kala duwan.Tixgelinta deegaanka iyo badbaadada ayaa ah dhinacyo muhiim ah oo ka mid ah wax soo saarka CMC, iyada oo xoogga saaraysa baahida loo qabo hab-dhaqannada wax-soo-saarka ee waara oo mas'uul ka ah.
Waqtiga boostada: Mar-27-2024