Uyini umehluko phakathi kokusebenza kwe-methyl cellulose ether ne-lignin fiber

Uyini umehluko phakathi kokusebenza kwe-methyl cellulose ether ne-lignin fiber

Impendulo: Ukuqhathaniswa kokusebenza phakathi kwe-methyl cellulose ether kanye ne-lignin fiber kuboniswa etafuleni

 Ukuqhathaniswa kokusebenza phakathi kwe-methyl cellulose ether ne-lignin fiber

Yini okufanele inakwe lapho usebenzisa i-methyl cellulose ne-carboxymethyl cellulose?

Impendulo: (1) Uma usebenzisa amanzi ashisayo ukuncibilikisa i-cellulose, kufanele apholise ngokugcwele ngaphambi kokusetshenziswa. Izinga lokushisa elidingekayo ukuze kuhlakazwe ngokuphelele kanye nokubonakala obala okufanele kuncike ohlotsheni lwe-cellulose.

(2) Izinga lokushisa elidingekayo ukuze uthole i-viscosity eyanele

Carboxymethylcellulose≤25℃, methylcellulose≤20℃

(3) Kancane kancane futhi ngokulinganayo hlunga i-cellulose emanzini, bese ugoqa kuze kube yilapho zonke izinhlayiya zicwiliswe, bese ugoqa kuze kube yilapho yonke isixazululo se-cellulose sisobala ngokuphelele futhi sicacile. Ungawatheli amanzi ngqo ku-cellulose, futhi ungafaki ngokuqondile inani elikhulu le-cellulose elincibilikile futhi lakhiwa izigaxa noma amabhola esitsheni.

(4)Ngaphambi kokuthi impuphu ye-cellulose imanziswe ngamanzi, ungafaki izinto ezine-alkali engxube, kodwa ngemva kokuhlakazwa nokucwiliswa, inani elincane le-alkaline solution aqueous (pH8 ~ 10) lingangezwa ukusheshisa ukuqedwa. Lezo ezingasetshenziswa yilezi: i-sodium hydroxide aqueous solution, i-sodium carbonate aqueous solution, i-sodium bicarbonate aqueous solution, amanzi omcako, amanzi e-ammonia kanye ne-organic ammonia, njll.

(5)I-cellulose ether efakwe phezulu inokuhlakazeka okungcono emanzini abandayo. Uma ingezwe ngokuqondile kwisisombululo se-alkali, ukwelashwa okungaphezulu kuzohluleka futhi kubangele ukufiphala, ngakho-ke ukunakekelwa okwengeziwe kufanele kuthathwe.

Yiziphi izici ze-methylcellulose?

Impendulo: (1) Uma ishisa ngaphezu kuka-200 ° C, iyancibilika futhi ibole. Umlotha ucishe ube ngu-0.5% uma ushisiwe, futhi awuthathi hlangothi uma wenziwa udaka ngamanzi. Ngokuqondene ne-viscosity yayo, kuya ngezinga le-polymerization.

(2) Ukuncibilika emanzini kuhambisana ngokuphambene nezinga lokushisa, izinga lokushisa eliphezulu linokuncibilika okuphansi, izinga lokushisa eliphansi linokuncibilika okuphezulu.

(3) Ingancibilika engxubeni yamanzi kanye nezincibilikisi eziphilayo, njenge-methanol, i-ethanol, i-ethylene glycol, i-glycerin ne-acetone.

(4) Uma kukhona usawoti wensimbi noma ama-electrolyte aphilayo kusisombululo saso esinamanzi, isixazululo sisengahlala sizinzile. Lapho i-electrolyte yengezwa ngenani elikhulu, ijeli noma imvula izokwenzeka.

(5)Inomsebenzi ongaphezulu. Ngenxa yokuba khona kwamaqembu e-hydrophilic kanye ne-hydrophobic kuma-molecule ayo, inemisebenzi ye-emulsification, i-colloid evikelayo kanye nokuzinza kwesigaba.

(6)Ukushisa okushisayo. Lapho isixazululo esinamanzi sikhuphukela ekushiseni okuthile (ngaphezu kwezinga lokushisa lejeli), sizoba nesiphithiphithi size sijike noma sinciphe, okubangele ukuba ikhambi lilahlekelwe yi-viscosity yalo, kodwa lingabuyela esimweni sokuqala ngemva kokupholisa. Izinga lokushisa lapho i-gelation kanye nemvula kwenzeka khona incike ohlotsheni lomkhiqizo, ukugxila kwesixazululo, kanye nezinga lokushisa.

(7)I-pH izinzile. I-viscosity yesisombululo esinamanzi ayithintwa kalula yi-asidi ne-alkali. Ngemva kokwengeza inani elikhulu le-alkali, kungakhathaliseki izinga lokushisa eliphezulu noma izinga lokushisa eliphansi, ngeke libangele ukubola noma ukuhlukana kweketango.

(8) Ngemva kokuba isixazululo sesomile ebusweni, singakha ifilimu esobala, eqinile futhi enwebekayo, engamelani nezinyibilikisi zemvelo, amafutha kanye namafutha ahlukahlukene. Ayijiki ibephuzi noma ibe luhlaza uma ichayeke ekukhanyeni, futhi ingaphinde incibilike emanzini. Uma i-formaldehyde yengezwa esixazululweni noma ngemva kokwelashwa nge-formaldehyde, ifilimu ayincibiliki emanzini, kodwa isenganwebeka kancane.

(9)Ukujiya. Ingakwazi ukujiya amasistimu amanzi kanye ne-non-aqueous, futhi inokusebenza okuhle kwe-anti-sag.

(10)I-Viscosity. Isixazululo saso samanzi sinokuhlangana okuqinile, okungathuthukisa ukuhlangana kukasimende, i-gypsum, upende, i-pigment, iphepha lodonga, njll.

(11)Ukumiswa. Ingasetshenziselwa ukulawula ukujiya kanye nemvula yezinhlayiya eziqinile.

(12)Vikela i-colloid futhi uthuthukise ukuzinza kwe-colloid. Kungavimbela ukunqwabelana kanye nokuhlangana kwamaconsi nezimibalabala, futhi kuvimbele ngempumelelo imvula.

(13)ukugcina amanzi. Isixazululo samanzi sine-viscosity ephezulu. Uma yengezwe odakeni, ingagcina amanzi amaningi, okuvimbela ngokuphumelelayo ukumuncwa kwamanzi ngokweqile yi-substrate (njengezitini, ukhonkolo, njll.) futhi kunciphisa izinga lokukhuphuka kwamanzi.

(14)Njengezinye izixazululo ze-colloidal, iqiniswa ngama-tannins, ama-protein precipitants, ama-silicates, ama-carbonates, njll.

(15)Ingaxutshwa ne-carboxymethyl cellulose kunoma iyiphi ingxenye ukuze uthole imiphumela ekhethekile.

(16) Ukusebenza kwesitoreji kwesixazululo kuhle. Uma ingagcinwa ihlanzekile ngesikhathi sokulungiswa nokugcinwa, ingagcinwa amasonto ambalwa ngaphandle kokubola.

QAPHELA: I-Methylcellulose ayiyona indawo yokukhula yama-microorganisms, kodwa uma ingcoliswa ngama-microorganisms, ngeke iwavimbele ukuba aphindaphindeke. futhi i-viscosity izokwehla ngalesi sikhathi. Kungase futhi kubangele ukuhlukana kuma-oxidizing agents, ikakhulukazi ezixazululweni ze-alkaline.

Uyini umphumela omkhulu we-carboxymethyl cellulose (CMC) ku-gypsum?

Impendulo: I-Carboxymethyl cellulose (CMC) idlala kakhulu indima yokuqina nokunamathela, futhi umphumela wokugcina amanzi awubonakali. Uma isetshenziselwa ukuhlanganiswa ne-ejenti yokugcina amanzi, ingajiya futhi iqinise i-gypsum slurry futhi ithuthukise ukusebenza kokwakhiwa, kodwa i-carboxymethyl cellulose I-cellulose eyisisekelo izobuyisela ukusetha kwe-gypsum, noma ngisho ingaqini, futhi amandla azokwehla kakhulu. , ngakho inani lokusetshenziswa kufanele lilawulwe ngokuqinile.