Igama lesiTshayina le-HPMC yiHydroxypropyl Methylcelcelcelcelceluplose. Ayisiyo i-ionic kwaye ihlala isetyenziswa njengearhente yokugcina amanzi kubukhoboka obuxubeneyo. Yeyona nto ixhaphakileyo esetyenziswayo kwindawo yokugcina amanzi.
Inkqubo yemveliso ye-HPMC ikakhulu yimveliso yase-Polysaccharide eveliswe yi-alkalization kunye nokutsala i-ether ye-fiber ye-cotton (ekhaya). Ayinamali, ayiphenduli ngee-ions ezihlawuliswayo kwizinto zentsholongwane, kwaye isebenza ngokuzinzileyo. Ixabiso likwaphantsi kunezinye iintlobo zeSeluplose Talupe, ngoko ke isetyenziswa ngokubanzi kubukhoboka oxubeneyo.
Umsebenzi we-hydroxypropyl methylcelcelcelse: Ingakwazi ukulinganisa udaka olusandul 'ukuxhumanisa ukuba nohlobo oluthile olumanzi kunye nokuthintela ukwahlulahlula. . .
Ukuphelisa i-viscofity ye-hydroxypropyl methylcelgalose ithe ther, ngcono ukusebenza kwendlela yokugcina amanzi. I-Viscosity yiparamitha ebalulekileyo ye-HPMC. Okwangoku, abavelisi be-HPMC eyahlukeneyo basebenzisa iindlela ezahlukeneyo kunye nezixhobo zokulinganisa i-HPMC. Iindlela eziphambili yi-haidopevizko, i-hoppler, ibbelohde kunye ne-brookfield.
Kwimveliso efanayo, iziphumo ze-viscofity zilinganiswe ngeendlela ezahlukeneyo zahluke kakhulu, kwaye ezinye zinokuphinda-phinda umohluko. Ke ngoko, xa kuthelekiswa nokundwendwela, kufuneka kwenziwe phakathi kweendlela ezifanayo zovavanyo, kubandakanya ubushushu, imboniselo, njl. Malunga nokugcinwa kwamanzi. Emva kwamasuntswana amakhulu e-Selersese Ether ingena ekuhlanganeni namanzi, umphezulu uyayinyibilika ngokukhawuleza kwaye uyisonge ijeli ukuba isonge imibandela yokuthintela iimolekyuli zamanzi eziqhubeka noko. Ngamanye amaxesha ayinakusasazeka ngendlela efanayo kwaye inyibilikisiwe nasemva kwexesha elide, ukwenza isisombululo se-scan esinamafu okanye i-agemmeration. Ichaphazela kakhulu ukugcinwa kwamanzi kwe-seluplose i-ether, kwaye ukuluka kwenye yezinto zokukhetha i-gather ekrway.
Ubuhle buyinto ebalulekileyo yentsebenzo ye-methyl selete. I-MC isetyenziselwa umgubo womgubo owomileyo kufuneka ube ngumgubo, ngomxholo wamanzi ophantsi, kwaye ukulunga kwanama-60% ~ ~ 60% ye-paricle ukuba ungaphantsi kwe-63um. Ukucombulula kuchaphazela ukunyibilisela kwe-hydroxypropyl methylcelcelgalose ether. I-MCE MC idla ngokuba ngumphathi, kwaye kulula ukunyibilika emanzini ngaphandle kokuncitshiswa, kodwa ireyithisi yokuchitheka icotha kakhulu, ngoko ayifanelekanga ukuba isetyenziswe ngodaka olwahlukileyo.
Ngomgubo owomileyo, i-MC ichithwayo kwizinto ezifana nesamente ezinje nge-agggate, i-fililler kunye nesamente, kunye nomgubo owoneleyo onokuphepha i-methyl ye-methyl ye-iteglose xa udibanisa namanzi. Xa i-MC yongezwa ngamanzi ukunyibilikisa i-agegomerates, kunzima kakhulu ukusasaza kunye nokunyibilikisa. I-Coardeney ye-MC ayiphelelanga, kodwa ikwanciphisa amandla endawo yodaka. Xa udaka lomgubo owomileyo lusetyenziswa kwindawo enkulu, isantya sokunyangwa komgubo owomileyo womanzi uya kuncitshiswa kakhulu, kwaye imingxunya iya kuvela ngenxa yamaxesha osahlukileyo. Ngodaka olutshintshiweyo ngolwakhiwo lwamatshini, imfuneko yokulunga iphezulu ngenxa yexesha elifutshane lokuxuba. Ngokubanzi, ukuphakama kwe-viscosity, eyona nto ilunge ngakumbi. Nangona kunjalo, ukuphakama kwe-viscofity kunye nokuphakathi kobunzima be-MC, ukwehla okufanayo ekuzenisweni kwalo kuya kuba nefuthe elibi kumandla kunye nokusebenza komsebenzi wokwakha.
Ukuphakama kwe-viscofity, eyona nto icacileyo yokuthambisa kodaka, kodwa ayifani ngokuthe ngqo. Ukuphakama okuphezulu, kokukhona udaka olunamanzi luya kuba, oko kukuthi, ngexesha lolwakhiwo, lubonakaliswa njengokunamathela kwi-scraper kunye nokunamathela okuphezulu. Kodwa akuncedi ukonyusa amandla olwakhiwo lofudu lwamanzi. Oko kukuthi, ngexesha lolwakhiwo, ukusebenza kwe-SAG-SAG akucacanga. Ngokuchasene noko, i-vissium ephakathi nephantsi kodwa iguqulwe i-methyl ye-melsulose entsebenzo ebalaseleyo ekuphuculeni amandla olwakhiwo lodaka lwamanzi.
Ukugcinwa kwamanzi i-HPMC ikwahambelana neqondo lobushushu elisetyenzisiweyo, kunye nokugcinwa kwamanzi kwe-methyl selethe i-ether ihle kakhulu kuncipha ngokunyuka kobushushu. Nangona kunjalo, kwizicelo zezinto ezibonakalayo, udaka lomgubo luhlala lusetyenziswa kumaxabiso ashushu kwiqondo lobushushu (elingaphezulu kwe-40 degrees) kwiindawo ezininzi ehlotyeni kwaye luhlala luza kukhanyisela isamente kunye nokukhuseleka kwe Umgubo owomileyo wodaka. Ukwehla kwenqanaba lokugcina amanzi kukhokelela kwimvakalelo ecacileyo yokuba zombini iindlela zokusebenza kunye nokuchasana kuyachaphazeleka, kwaye kubaluleke kakhulu ukunciphisa ifuthe lezinto zobushushu phantsi kwale meko.
Ngokuphathelene noku, i-Methyl HydroxyEtheetheetheetheetheetheetheetheeteethl ye-Ether Orupitives ngoku ithathelwa ingqalelo ukuba iphambili kuphuhliso lwetekhnoloji. Nangona inani le-methyl hydroxythyl seluplose inyuswe (ifomula yehlobo), ukusebenza kunye nokunganyangeki kwe-rack akunakufikeleleka kwiimfuno zokusetyenziswa. Ngolunye unyango olukhethekileyo kwi-MC, njengokukhulisa inqanaba lokuthengisa, njl njl.
Umthamo we-HPMC akufuneki ukuba uphakame kakhulu, kungenjalo uya kwandisa imfuno yamanzi odaka, iya kunamathela kwi-troul, kwaye ixesha eliya kuba lide kakhulu, eliya kuchaphazela ukwakha. Iimveliso ezahlukeneyo zokungcola zisebenzisa i-HPMC ngokundwendwela ezahlukeneyo, kwaye azisebenzisi i-viscofity ephezulu ye-HPMC. Ke ngoko, nangona i-hydroxypropyl methylcelcelcelsed ihle, ziqhwaba izandla xa zisetyenziswa kakuhle. Ukukhetha i-HPMC yasekunene ngoxanduva oluphambili lwamashishini abasebenzi be-shishini. Okwangoku, abathengisi abaninzi abanganyanisekanga bahlanganisa i-HPMC, kwaye umgangatho ungamahlwempu. Xa ukhetha i-sellyulise ethile, ilabhoratri kufuneka yenze umsebenzi olungileyo kuvavanyo lokuqinisekisa ukuzinza kobuxoki, kwaye musa ukubawa ngexabiso eliphantsi kwaye ubangele ilahleko engafanelekanga.
Ixesha lokuposa: I-04-2023