Soo saarista ethers cellulose saafi ah waxay ku lug leedahay dhowr tillaabo, laga bilaabo soo saarista cellulose ee alaabta dhirta ilaa habka wax ka beddelka kiimikada.
Sourcing Cellulose: Cellulose, polysaccharide ah oo laga helo gidaarada unugyada dhirta, waxay u adeegtaa sida alaabta ceeriin ee ethers cellulose. Ilaha caadiga ah waxaa ka mid ah saxarka alwaax, suuf, iyo dhirta kale ee fibros ah sida jute ama hemp.
Duubista: Duubku waa habka lagu kala saaro fiilooyinka cellulose ee walxaha dhirta. Tan waxaa caadi ahaan lagu gaaraa qaab makaanik ama kiimiko. Burburinta makaanikada waxay ku lug leedahay shiididda ama nadiifinta walxaha si ay u kala soocaan fiilooyinka, halka kiimikooyinka, sida habka kraft, ay isticmaalaan kiimikooyinka sida sodium hydroxide iyo sodium sulfide si ay u milaan lignin iyo hemicellulose, iyagoo ka tagaya cellulose.
Bleaching (Ikhtiyaar): Haddii nadiif sare la rabo, saxarka cellulose waxaa laga yaabaa inuu maro habka bleaching si looga saaro wixii haray ee lignin, hemicellulose, iyo wasakh kale. Chlorine dioxide, hydrogen peroxide, ama oksijiin ayaa ah maaddooyinka bleaching ee caadiga ah ee loo isticmaalo tallaabadan.
Dhaqdhaqaaqa: Ether-ka Cellulose waxaa sida caadiga ah loo diyaariyaa ka falcelinta cellulose leh biraha alkali hydroxides si ay u sameeyaan dhexdhexaad ah alkali cellulose. Tallaabadani waxay ku lug leedahay bararka fiilooyinka cellulose ee xal sodium hydroxide ama potassium hydroxide heerkul sarreeya. Tallaabadan firfircoonidu waxay ka dhigaysaa cellulose mid aad uga falceliya xagga eterification.
Etherification: Etherification waa tallaabada ugu muhiimsan ee soo saarida ethers cellulose. Waxay ku lug leedahay soo bandhigida kooxaha etherka (sida methyl, ethyl, hydroxyethyl, ama kooxaha hydroxypropyl) ee lafta dhabarka cellulose. Dareen-celintan waxaa sida caadiga ah lagu fuliyaa iyadoo lagu daweynayo alkali cellulose iyada oo la adeegsanayo walxaha dareeraha ah sida alkyl halides (tusaale, methyl chloride for methyl cellulose), alkylene oxides (tusaale, ethylene oxide ee hydroxyethyl cellulose), ama alkyl halohydrins (tusaale, propylene oxide ee hydroxypropyl cellulose). ) iyadoo lagu hoos jiro xaaladaha heerkulka, cadaadiska, iyo pH.
Dhexdhexaadinta iyo Dhaqidda: Ka dib marka la nadiifiyo, isku darka falcelinta ayaa dhexdhexaad ah si meesha looga saaro alkali-ka xad-dhaafka ah. Tan waxaa badanaa lagu sameeyaa iyadoo lagu darayo aashitada, sida hydrochloric acid ama sulfuric acid, si loo baabi'iyo alkali oo ay u soo dedejiso etherka cellulose. Alaabta ka dhalata ayaa markaa lagu dhaqaa biyo si looga saaro kiimikooyinka haraaga ah iyo alaabta ka soo baxda.
Qalajinta: Alaabta ether-ka cellulose ee la dhaqay ayaa sida caadiga ah la qalajiyey si looga saaro qoyaanka xad-dhaafka ah oo loo helo foomka ugu dambeeya ee budada ama granular. Tan waxaa lagu samayn karaa iyadoo la adeegsanayo farsamooyinka sida qalajinta hawada, qalajinta faakuumka, ama qalajinta buufinta.
Xakamaynta Tayada: Tallaabooyinka xakamaynta tayada ayaa lagama maarmaan u ah si loo hubiyo nadiifnimada, joogtaynta, iyo sifooyinka la rabo ee ethers cellulose. Tani waxay ku lug leedahay tijaabinta badeecada si loo cabbiro sida heerka beddelka, viscosity, qaybinta cabbirka qaybinta, qoyaanka, iyo nadiifinta iyadoo la adeegsanayo farsamooyinka falanqaynta sida titration, viscometry, iyo spectroscopy.
Baakadaha iyo Kaydinta: Marka ether-ka cellulose-ka la qalajiyo oo tayada la tijaabiyo, waxaa lagu xiraa weelal ku habboon waxaana lagu kaydiyaa xaaladaha la xakameeyey si looga hortago qaadashada qoyaanka iyo hoos u dhaca. Calaamadeynta saxda ah iyo dukumeentiga tafaasiisha dufcada ayaa sidoo kale muhiim u ah raadinta iyo u hoggaansanaanta sharciga.
Marka la raaco tillaabooyinkan, waxaa suurtogal ah in la soo saaro ethers cellulose saafi ah oo leh guryaha la rabo ee codsiyada warshadaha kala duwan, oo ay ku jiraan daawooyinka, cuntada, qurxinta, dharka, iyo qalabka dhismaha.
Waqtiga boostada: Abriil-24-2024