I-Celsulose Ether isebenzisa ngodaka oluhlanganisiwe olomile

Imiphumela yemiphumela eminingana evamile ye-cellose kanye nezinhlanga ezixubile e-wonduli exutshwe ngokugcinwa kwamanzi nokuqina, ukuqina, ukusebenziseka, ukusebenza kodaka okuhlanganisiwe, namandla odaka oluhlanganisiwe. Kungcono kune-ether eyodwa; Ukuqondiswa kwentuthuko kokusetshenziswa kwe-cellulose ether ngodaka oluhlanganisiwe oluhlanganisiwe luhlonishwa.

Amagama asemqoka:I-Cellulose Ether; usimende oxutshwe omile; I-Ether eyodwa; I-ether exubile

Udaka lwendabuko lunezinkinga njengokuqhekeka okulula, ukopha, ukusebenza kabi, ukungcoliswa kwemvelo, ukungcoliswa kwemvelo, njll., Futhi kancane kancane kuzothathelwa indawo ngodaka ngodaka oluxutshwe. Udaka oluhlanganisiwe olomile, owaziwa nangokuthi udaka lwangaphambi kokuxutshwa (owomile), impahla eyomile, isibhamu esomile, udaka olomile, udaka olomile, udaka olomile oluqediwe ngaphandle kokuxuba amanzi ngaphandle kokuxuba amanzi. I-Cellulose Ether inezakhiwo ezinhle kakhulu njengokuqina, ukuqinisekiswa, ukumiswa, ukwakheka kwamafilimu, okuvikela i-colloid, nokunamathela, futhi kungukuhlanganiswa okubalulekile kodaka oluhlanganisiwe.

Leli phepha lingenisa izinzuzo, ezibubi kanye nomkhuba wentuthuko we-cellulose ether ekusetshenzisweni kodaka oluhlanganisiwe.

1. Izici zodaka oluxutshwe omile

Ngokwezidingo zokwakha, udaka oluxutshwe olomile lungasetshenziswa ngemuva kokukalwa ngokunembile futhi kuxutshwe ngokugcwele emhlanganweni wokukhiqiza, bese kuxutshwa namanzi endaweni yokwakha ngokuya ngesilinganiso esinqunyelwe samanzi. Uma kuqhathaniswa nodaka lwendabuko, udaka oluxutshwe omile lunezinzuzo ezilandelayo:①Ikhwalithi enhle kakhulu, udaka oluxutshwe olomile lukhiqizwa ngokuya ngefomula yesayensi, ezenzakalelayo ezihamba phambili, okuhambisana namalungelo obuzekayo ukuqinisekisa ukuthi umkhiqizo ungahlangabezana nezidingo zekhwalithi ekhethekile;②Okuhlukahlukene okuchichimayo, ukukhiqizwa kohlobo lokusebenza okuhlukahlukene kungakhiqizwa ngokuya ngezidingo ezihlukile;③Ukusebenza okuhle kokwakhiwa, okulula ukufaka isicelo kanye nokwakha, ukuqeda isidingo se-substrate prestrate prestrate prestrate pre-wetting kanye nokulungiswa kwamanzi okulandelayo;④Kulula ukuyisebenzisa, vele ungeze amanzi bese uvusa, kulula ukuthutha nokugcina, elula ukuphathwa kokwakha;⑤Ukuvikelwa okuluhlaza kanye nemvelo, alukho uthuli esakhiweni sokwakha, azikho izinqwaba ezahlukahlukene zezinto zokwakha, ukunciphisa umthelela endaweni ezungezile;⑥Udaka lwezomnotho, oluhlanganisiwe olunyathelwe lugwema ukusetshenziswa okungenangqondo kwezinto ezingavuthiwe ngenxa yezithako ezinengqondo, futhi kufanelekile ukwakhiwa kwemishini kunciphisa umjikelezo wokwakha futhi kunciphisa izindleko zokwakha.

I-Cellulose Ether iyinhlangano yokuhlanganiswa ebalulekile yodaka oluhlanganisiwe omile. I-Celsulose Ether ingakha i-calcium-silical-ardroxide (Csh) Compound (Csh) ehlanganisiwe nesihlabathi kanye nosimende ukuze ahlangabezane nezidingo zezinto zodaka ezintsha zokusebenzisana.

2. I-cellulose ether njengokuhlanganiswa

I-Cellulose Ether iyi-polymer yemvelo elungisiwe lapho ama-athomu e-hydrogen eqenjini le-hydroxy kuyunithi yesakhiwo se-cellulose athathelwa indawo amanye amaqembu. Uhlobo, ubungako kanye nokusabalalisa amaqembu afaka esikhundleni se-cellulose main chain anqume uhlobo nemvelo.

Iqembu le-hydroxyl ku-cellulose ether molecular chain likhiqiza izibopho ze-oksijini ze-intermolecular, ezingathuthukisa ukufana nokuphelela kokuphelela kwe-hydration; Khulisa ukuvumelana ngodaka, uguqule i-Rhelogy kanye nokuxineka kodaka; thuthukisa ukumelana nokuqhekeka kodaka; Ukufaka umoya, ukuthuthukisa ukusebenziseka kodaka.

2.1 Ukusetshenziswa kwe-carboxymethyl cellulose

I-Carboxymethylcelcelcellellose (CMC) iyi-ionic yamanzi eyodwa ye-cellulose ether, futhi usawoti wawo we-sodium uvame ukusetshenziswa. I-Pure CMC iyimpuphu emhlophe noma emhlophe emusha Izinkomba eziphambili ukukala ikhwalithi ye-CMC ziyi-degree of subliation (DS) kanye nokubonakala, ukucaca nokuqina nokuqina kwesixazululo.

Ngemuva kokungeza i-CMC kudaka, inemiphumela ebonakalayo yokuqina nokugcina amanzi, futhi umphumela wokuqina uncike kakhulu kusisindo sayo samangqamuzana kanye nezinga lokufaka esikhundleni. Ngemuva kokungeza i-CMC amahora angama-48, kwalinganiswa ukuthi izinga lokufakwa kwamanzi kwesampula lodaka linciphile. Ukwehlisa izinga lokufakwa kwamanzi, kuphakama inani lokugcinwa kwamanzi; Umphumela wokugcina amanzi ukhuphuka ngokwanda kokungezwa kwe-CMC. Ngenxa yomphumela omuhle wokugcina amanzi, kungaqinisekisa ukuthi ingxube yodaka eyomile ayikhiphi noma ihlukanise. Njengamanje, i-CMC isetshenziswa ikakhulukazi njenge-ejenti elwa nokuhlanza emadamu, emabhukwini, amabhuloho nezinye izakhiwo, ezinganciphisa umthelela wamanzi ku-cement kanye nama-applegetes ezinhle futhi kunciphise ukungcoliswa kwemvelo.

I-CMC iyingxenye ye-ionic futhi inezidingo eziphakeme ku-CEAND, ngaphandle kwalokho ingasabela nge-CA (OH) 2 ichithwe ku-Callium Carluble kwe-CMC ayikhubazekile; Ukumelana ne-enzyme ye-CMC ayimpofu.

2.2 ukusetshenziswa kweIHydroxYethyl Cellulosekanye ne-hydroxypropyl cellulose

I-Hydroxyyethyl cellulose (HEC) neHydroxypropyl Cellulose (HPC) ayizithana ezingezona izithambiso zamanzi ezi-collule ezingezona ezinamanzi aphezulu ngosawoti. I-HEC iqinile ukushisa; ukuncibilika kalula emanzini abandayo nawashisayo; Lapho inani le-PH lingu-2-12, i-viscosity ishintsha kancane. I-HPC iyanyibilika emanzini angaphansi kwama-40°C kanye nenani elikhulu le-polar solvents. Inobuqili kanye nomsebenzi ongaphezulu. Lapho kukhuphuka izinga lokufaka esikhundleni sokufaka esikhundleni, okunciphisa izinga lokushisa kwamanzi lapho i-HPC ingachithwa khona.

Njengoba inani le-HEC elingezwe lodaka, amandla acindezelayo, amandla ashubile nokuphikiswa kokugqwala kokwehla kodaka kwesikhathi esifushane, futhi ukusebenza kushintsha kancane ngokuhamba kwesikhathi. I-HEC futhi ithinta ukusatshalaliswa kwama-pores kudaka. Ngemuva kokungeza i-HPC kudaka, i-pority yodaka iphansi kakhulu, futhi amanzi adingekayo ancishisiwe, ngaleyo ndlela anciphise ukusebenza kodaka. Ekusetshenzisweni kwangempela, i-HPC kufanele isetshenziswe ndawonye ngesositiki ukwenza ngcono ukusebenza kodaka.

2.3 Ukusetshenziswa kwe-methyl cellulose

I-methylcellulose (MC) yi-ether eyodwa ye-cellulose eyodwa, engasabalalisa ngokushesha futhi ivuvukale emanzini ashisayo ngo-80-90°C, bese uncibilika ngokushesha ngemuva kokupholisa phansi. Isixazululo esinamanzi se-MC singakha ijeli. Lapho kufudunyezwa, i-MC ayincibiliki emanzini ukwakha ijeli, futhi lapho ipholile, ijeli liyancibilika. Le nto iphendulwa ngokuphelele. Ngemuva kokungeza i-MC kuya ku-data, umphumela wokugcina amanzi ngokusobala uthuthukiswa. Ukugcinwa kwamanzi kwe-MC kuncike ekubonakaleni kwayo, izinga lokufaka esikhundleni, inzuzo, kanye nenani lezengezo. Ukungezwa kwe-MC kungathuthukisa impahla elwa nokusabalalisa ngodaka; Thuthukisa ukugcotshwa kwabantu kanye nokufana kwezinhlayiya ezihlakazekile, yenza umdubuli ovuthayo kanye nomfaniswano owengeziwe, umphumela wokuthambekela nokubushelelezi kulungile, futhi ukusebenza kwenziwa ngcono.

Inani le-MC elingeziwe linethonya elikhulu kudaka. Lapho okuqukethwe kwe-MC kukhulu kune-2%, amandla odaka ancishiswa abe yingxenye yangempela. Umphumela wokugcina amanzi ukhuphuka ngokunyuka kokubonakaliswa kwe-MC, kepha lapho i-viscosity ye-MC ifinyelela inani elithile, ukubulawa kwamanzi kwehla, ukugcinwa kwamanzi akushintshi.

2.4 Ukusetshenziswa kwe-hydroxyyethylmethylcellellellellellellulose kanye hydroxypropylmetylcellellulose

I-ether eyodwa inobunzima bokungafani okumpofu, ukuhlangana kanye nokuqina okusheshayo lapho imali ingezwa incane, futhi iningi voids ku-duncre likhulu, futhi ubunzima bokhonkolo buwohloka; Ngakho-ke, ukusebenziseka, amandla acindezelayo, namandla aguqukayo ukusebenza akukuhle. Abaphathi abaxubekile banganqoba ukushiyeka kokuthambekela okukodwa ngezinga elithile; Inani elingeziwe lingaphansi kwalo lokuthethala okukodwa.

Hydroxyhethylmethylcellellellose (hemc) kanye ne-hydroxypropylterlelcellellellellellellellulose (HPMC) yizimpi ezixubile ze-celluLose ether ngayinye ether.

Ukuvela kwe-hemc kumhlophe, okumhlophe-okumhlophe okumhlophe noma i-granule, ngaphandle kwephunga futhi okungenamkhawulo, hygroscopic, insoluble emanzini ashisayo. Ukuchithwa akuthinteki ngenani le-PH (elifana ne-MC), kepha ngenxa yokwengeza kwamaqembu ama-hydroxyethyl kumaketanga ama-molecular, kulula ukubekezelela usawoti kune-MC, futhi kunamazinga okushisa aphezulu aphezulu. I-Hemc inokugcinwa kwamanzi okunamandla kune-MC; Ukuqina kwe-Viscosity, ukumelana isikhutha, kanye nokungafani kunamandla kune-hec.

I-HPMC i-powder emhlophe noma ye-off-emhlophe, engeyona inobuthi, ayinambitha futhi ayiphunga. Ukusebenza kwe-HPMC enokucaciswa okuhlukile kuhluke kakhulu. I-HPMC iyancibilika emanzini abandayo ibe yisixazululo esicacile noma esincanyana se-colloidal, incibilika kwezinye izixazululo ze-organic, futhi nayo inyuka emanzini. Izindonga ezixubile ze-organic solvents, njenge-ethanol endaweni efanelekile, emanzini. Isixazululo samanzi sinezici zomsebenzi omkhulu wendawo, ukucaca okuphezulu nokusebenza okuzinzile. Ukuchithwa kwe-HPMC emanzini nakho akungathintwa yi-pH. I-Solubolity iyahlukahluka nge-viscosity, kwehlisa i-viscosity, kukhudlwana i-solubity. Ngokwehla kokuqukethwe kwe-methoxyl kuma-molecule we-HPMC, iphuzu le-gel le-HPMC lenyuka, amanzi e-solubity ancipha, futhi umsebenzi webanga elingaphezulu uyancipha. Ngaphezu kwezimfanelo ezijwayelekile zamanye ama-cellulose 'tileth, i-HPMC nayo inokumelana nosawoti okuhle, ukuqina kobukhulu, ukumelana ne-enzyme, kanye nokungafani okuphezulu.

Imisebenzi esemqoka ye-hemc ne-hpmc ngodaka oluhlanganisiwe olomile lumi ngokulandelayo.①Ukugcinwa kwamanzi okuhle. IHemc ne-HPMC bangaqinisekisa ukuthi udaka ngeke abangele izinkinga ezinjenge-sanding, i-powmpiong kanye nokuncishiswa kwamandla komkhiqizo ngenxa yokuntuleka kwamanzi kanye nokuntuleka kwamanzi. Thuthukisa ukufana, ukusebenziseka kanye nokuqina komkhiqizo. Lapho inani le-HPMC elingeziwe likhulu kune-0,08%, ukucindezelwa kwesivuno kanye nokubonakaliswa kwepulasitiki kodaka nakho kukhuphuka ngokwanda kwenani le-HPMC.②Njenge-ejenti yokungena komoya. Lapho okuqukethwe kwe-hemc ne-HPMC kungu-0,5%, okuqukethwe yigesi kuyinto enkulu kunazo zonke, cishe ngo-55%. Amandla aguqukayo namandla acindezelayo odaka.③Thuthukisa ukusebenza. Ukungezwa kwe-hemc ne-HPMC kusiza amakhadi we-dollar omncane ongqimba kanye nokudonswa kodaka oluphambayo.

I-Hemc ne-HPMC ingabambezela i-hydration yezinhlayiya zodaka, i-DS yiyona into ebaluleke kakhulu ethinta i-hydration, futhi umphumela wokuqukethwe kwe-methoxyl nge-hydration mkhulu kunalokho okuqukethwe kwe-hydroxyethylyl kanye ne-hydroxyproppy.

Kufanele kuqashelwe ukuthi i-cellulose ether inomthelela ophindwe kabili ekusebenzeni kodaka, futhi ingadlala indima enhle uma isetshenziswe kahle, kepha izoba nomthelela omubi uma isetshenziswe ngokungafanele. Ukusebenza kodaka oluxutshwe ngodaka kuhlobene okokuqala nokuguquguquka kwe-cellulose ether, futhi i-ether ye-cellulose esebenzayo ihlobene nezinto ezifana nenani nokuhleleka kwenani. Kuzinhlelo zokusebenza ezisebenzayo, uhlobo olulodwa lwe-cellulose ether lungakhethwa, noma izinhlobo ezahlukene ze-cellulose ether zingasetshenziswa ngokuhlanganiswa.

3. Ukubuka

Ukuthuthukiswa okusheshayo kodaka oluhlanganisiwe olomile kunikeza amathuba nezinselelo zokuthuthukiswa kanye nokusetshenziswa kwe-cellulose ether. Abaphenyi kanye nabakhiqizi kufanele basebenzise ithuba lokuthuthukisa izinga labo lobuchwepheshe, futhi basebenze kanzima ukukhulisa izinhlobonhlobo futhi bathuthukise ukuqina komkhiqizo. Ngenkathi uhlangabezana nezidingo zokusetshenziswa kodaka oluhlanganisiwe, luthole i-leap embonini ye-cellulose ether.