IHydroxyethylcellulose (HEC) iyi-polymer engeyona ionic encibilika emanzini esetshenziswa kabanzi ekwembathweni, kwezimonyo, ezintweni zokwakha, emithini nakwezinye izimboni. Umsebenzi wayo oyinhloko unjenge-thickener, i-ejenti yokumisa, i-ejenti eyenza ifilimu kanye ne-stabilizer, engathuthukisa kakhulu izakhiwo ze-rheological zomkhiqizo. I-HEC inokunyibilika okuhle, ukuqina, ukwakheka kwefilimu nokuhambisana, ngakho-ke iyathandeka emikhakheni eminingi. Nokho, mayelana nokuzinza kwe-HEC nokusebenza kwayo ezindaweni ezihlukene ze-pH, kuyisici esibalulekile okufanele sicatshangelwe ekusetshenzisweni okungokoqobo.
Mayelana nokuzwela kwe-pH, i-hydroxyethylcellulose, njenge-polymer engeyona i-ionic, ngokwemvelo ayizwani nokushintsha kwe-pH. Lokhu kuhlukile kwezinye izingqimba ze-ionic (ezifana ne-carboxymethylcellulose noma ama-polymer athile e-acrylic), aqukethe amaqembu e-ionic ezakhiweni zawo zamangqamuzana futhi athambekele ekuhlukaniseni noma e-ionization ezindaweni ezine-asidi noma ezine-alkali. , ngaleyo ndlela kuthinte umphumela wokuqina kanye nezakhiwo ze-rheological zesisombululo. Ngenxa yokuthi i-HEC ayinakho ukushaja, umphumela wayo wokujiya kanye nezakhiwo zokuncibilika zihlala zizinzile phezu kwebanga elibanzi le-pH (imvamisa i-pH 3 kuya ku-pH 11). Lesi sici senza i-HEC ikwazi ukuzivumelanisa nezinhlelo ezihlukahlukene zokubunjwa futhi ingaba nomthelela omuhle wokujiya ngaphansi kwezimo ezine-asidi, ezingathathi hlangothi noma ezine-alkali ebuthakathaka.
Nakuba i-HEC inokuqina okuhle ngaphansi kwezimo eziningi ze-pH, ukusebenza kwayo kungase kuthinteke ezindaweni eziyingozi kakhulu ze-pH, njengezindawo ezine-acidic ngokweqile noma ezine-alkaline. Isibonelo, ngaphansi kwezimo ezine-acidic kakhulu (pH <3), ukuncibilika kwe-HEC kungase kuncishiswe futhi umphumela wokujiya ungase ungabi ophawulekayo njengasezindaweni ezingathathi hlangothi noma ezine-acidic kancane. Lokhu kungenxa yokuthi ukugxilwa kwe-hydrogen ion ngokweqile kuzothinta ukwakheka kweketango lamangqamuzana e-HEC, kunciphise ikhono layo lokusabalalisa nokuvuvukala emanzini. Ngokunjalo, ngaphansi kwezimo ze-alkaline kakhulu (pH> 11), i-HEC ingase ibe nokuwohloka ngokwengxenye noma ukuguqulwa kwamakhemikhali, okuthinta umphumela wayo wokujiya.
Ngaphezu kokuncibilika kanye nemiphumela yokuqina, i-pH ingase futhi ithinte ukuhambisana kwe-HEC nezinye izingxenye zokwakheka. Ngaphansi kwezindawo ezihlukene ze-pH, ezinye izithako ezisebenzayo zingase zi-ionize noma zihlukanise, ngaleyo ndlela ziguqule ukusebenzisana kwazo ne-HEC. Isibonelo, ngaphansi kwezimo ezine-acidic, amanye ama-ion ensimbi noma izithako ezisebenzayo ze-cationic zingakha ama-complexes nge-HEC, okubangele umphumela wawo wokujiya ube buthakathaka noma ugwadule. Ngakho-ke, ekwakhiweni kokubunjwa, ukusebenzisana phakathi kwe-HEC nezinye izithako ngaphansi kwezimo ze-pH ezihlukene kudingeka kucatshangelwe ukuze kuqinisekiswe ukuzinza nokusebenza kwalo lonke uhlelo.
Nakuba i-HEC ngokwayo ingazweli kangako ekushintsheni kwe-pH, izinga layo lokuqedwa kanye nenqubo yokuqedwa ingase ithintwe yi-pH. I-HEC ivamise ukuncibilika ngokushesha ngaphansi kwezimo ezingathathi hlangothi noma ezine-acidic kancane, kuyilapho ngaphansi kwezimo ezine-acidic ngokwedlulele noma ezine-alkaline inqubo yokuchithwa ingase ihambe kancane. Ngakho-ke, lapho ulungiselela izixazululo, kuvame ukutuswa ukuthi uqale wengeze i-HEC kwisisombululo samanzi esingathathi hlangothi noma esiseduze-neutral ukuze kuqinisekiswe ukuthi incibilika ngokushesha nangokulinganayo.
I-Hydroxyethylcellulose (HEC), njenge-polymer engeyona i-ionic, ayizweli kancane ku-pH futhi ingagcina imiphumela ezinzile yokujiya kanye nezakhiwo zokuncibilika phezu kwebanga elibanzi le-pH. Ukusebenza kwayo kuzinzile uma kuqhathaniswa nebanga le-pH 3 ukuya ku-pH 11, kodwa endaweni ene-asidi ne-alkali eyeqisayo, umphumela wayo wokujiya nokuncibilika kungase kuthinteke. Ngakho-ke, lapho usebenzisa i-HEC, nakuba ezimweni eziningi asikho isidingo sokunaka kakhulu izinguquko ze-pH, ngaphansi kwezimo ezimbi kakhulu, ukuhlolwa okufanele nokulungiswa kusadingeka ukuze kuqinisekiswe ukuzinza nokusebenza kwesistimu.
Isikhathi sokuthumela: Oct-22-2024