Polyanionic cellulose (PAC) ndi chochokera ku cellulose chosinthidwa chomwe chimagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana. Polima wosunthika uyu amachokera ku cellulose, polysaccharide yachilengedwe yomwe imapezeka m'makoma a cellulose. Kusintha kumaphatikizapo kukhazikitsidwa kwa magulu a anionic pamsana wa cellulose, potero kumawonjezera kusungunuka kwamadzi ndikusintha mawonekedwe a rheological. PAC yomwe ikubwera ili ndi katundu wapadera womwe umapangitsa kuti ikhale yamtengo wapatali mumakampani amafuta ndi gasi, kupanga chakudya, mankhwala, ndi zina zambiri.
Ma cellulose ndi mzere wa polima wopangidwa ndi mayunitsi a shuga obwerezabwereza olumikizidwa ndi β-1,4-glycosidic bond. Ndilochuluka mu chilengedwe ndipo ndi gawo la makoma a cell cell. Komabe, mapadi achilengedwe amakhala ndi kusungunuka kochepa m'madzi chifukwa champhamvu zake zomangira ma hydrogen. Kuti athane ndi izi, cellulose ya polyanionic idapangidwa kudzera muzosintha zingapo zamankhwala.
Njira yodziwika bwino yopangira PAC imakhala ndi etherification kapena esterification reaction. Panthawi imeneyi, magulu a anionic, monga carboxylate kapena sulfonate magulu, amalowetsedwa mu unyolo wa cellulose. Izi zimapangitsa kuti polima ikhale yoyipa, ndikupangitsa kuti ikhale yosungunuka m'madzi ndikuyipatsa mawonekedwe apadera. Mlingo wakusintha kapena kuchuluka kwa magulu a anionic pa yuniti ya glucose zitha kusinthidwa kuti zigwirizane ndi zomwe PAC yatsatira kuti ikwaniritse zofunikira za kagwiritsidwe ntchito.
Chimodzi mwazofunikira kwambiri za PAC ndi makampani amafuta ndi gasi, komwe amagwiritsidwa ntchito ngati chowonjezera pakubowola madzi. Zamadzimadzi zobowola, zomwe zimadziwikanso kuti matope, zimagwira ntchito zosiyanasiyana pobowola zitsime zamafuta ndi gasi, kuphatikiza kuziziritsa pobowola, kutumiza zodulidwa kumtunda, ndikusunga bata m'chitsime. Kuonjezera PAC kumadzimadzi obowola kumawongolera mawonekedwe ake, monga kukhuthala ndi kutayika kwamadzimadzi. Zimagwira ntchito ngati tackifier, kuteteza zolimba kuti zikhazikike ndikuwonetsetsa kuyimitsidwa koyenera mumadzimadzi.
Ma rheological properties a PAC amatha kusinthidwa bwino kuti akwaniritse bwino pakati pa mamasukidwe akayendedwe ndi kuwongolera kutaya kwamadzi. Izi ndizofunikira makamaka pakubowola pansi pamikhalidwe yosiyanasiyana, monga mawonekedwe osiyanasiyana ndi kutentha. Kusungunuka kwamadzi kwa PAC kumapangitsanso kukhala kosavuta kusakanikirana ndi madzi obowola, ndipo kukhazikika kwake pamitundu ingapo ya pH kumawonjezera kugwiritsidwa ntchito kwake m'munda.
Kuphatikiza pa ntchito yake pobowola madzi, PAC imagwiritsidwa ntchito m'njira zosiyanasiyana. M'makampani azakudya, amagwiritsidwa ntchito ngati thickener ndi stabilizer muzinthu monga mavalidwe a saladi, sosi ndi mkaka. Kuthekera kwake kukulitsa kukhuthala ndikuwongolera kapangidwe kake kumapangitsa kukhala kofunikira pamapangidwe pomwe zinthuzi ndizofunikira.
Makampani opanga mankhwala amagwiritsanso ntchito ma PAC ngati othandizira pakupanga mankhwala. Itha kuphatikizidwa muzopaka zamapiritsi ndi kutulutsa koyendetsedwa bwino kuti muchepetse kuchuluka kwa mankhwala. Kugwirizana kwachilengedwe komanso kawopsedwe kakang'ono ka PAC kumathandizira kuti ivomerezedwe pazamankhwala.
Kuphatikiza apo, PAC yapeza ntchito m'njira zoyeretsera madzi. Maonekedwe ake a anionic amalola kuti azitha kuyanjana ndi tinthu tating'onoting'ono tabwino, zomwe zimathandiza kuchotsa zonyansa m'madzi. Pankhaniyi, imakhala ngati flocculant kapena coagulant, kulimbikitsa kaphatikizidwe wa particles kuti zosavuta kuchotsa ndi sedimentation kapena kusefera.
Ngakhale kugwiritsiridwa ntchito kwake kofala, nkhani zomwe zingatheke zachilengedwe ndi zokhazikika zokhudzana ndi kupanga ndi kutaya kwa PAC ziyenera kuganiziridwa. Ofufuza ndi mafakitale akufufuza mosalekeza chemistry yobiriwira komanso njira zina zama cellulose kuti athetse vutoli.
Polyanionic cellulose ndi chitsanzo chodziwika bwino cha momwe kusinthika kwamankhwala kungasinthire ma polima achilengedwe kukhala zinthu zambiri zogwiritsa ntchito zosiyanasiyana. Ntchito yake m'mafakitale monga mafuta ndi gasi, chakudya ndi mankhwala amawunikira kusinthasintha kwake komanso kufunikira kopitilira muyeso wa zotumphukira za cellulose munjira zamakono zopangira. Pamene ukadaulo ukupita patsogolo komanso kufunikira kwa mayankho okhazikika kukukulirakulira, kusaka kwa njira zokomera zachilengedwe zopangira PAC ndikugwiritsa ntchito kwake kukupitilira kukula.
Nthawi yotumiza: Dec-19-2023