Polyanionic cellulose (PAC) ndi chochokera ku cellulose, chomwe ndi polima wopezeka mwachilengedwe m'makoma a cellulose.Ma cellulose amapangidwa ndi mayunitsi obwerezabwereza omwe amalumikizidwa pamodzi ndi ma beta-1,4-glycosidic bond, kupanga maunyolo aatali.Ndi imodzi mwazinthu zomwe zimapezeka kwambiri padziko lapansi ndipo zimakhala ngati gawo lazomera.Ma cellulose a polyanionic amapangidwa kuchokera ku cellulose kudzera m'magulu angapo azinthu zomwe zimabweretsa magulu a anionic pamsana wa cellulose.Magulu a anionic awa amapatsa PAC mawonekedwe ake apadera ndikupangitsa kuti ikhale yamtengo wapatali pamafakitale osiyanasiyana.
1.Mapangidwe a Chemical ndi Kaphatikizidwe:
Polyanionic cellulose imapangidwa ndi etherification kapena esterification ya cellulose.Panthawi ya etherification, magulu a hydroxyl (-OH) pamaketani a cellulose amalowetsedwa ndi magulu a ether, makamaka magulu a carboxymethyl (-CH2COOH) kapena carboxyethyl (-CH2CH2COOH).Izi zimabweretsa zolakwa pa cellulose msana, zomwe zimapangitsa kuti zisasungunuke m'madzi komanso zopanda pake zonse.Digiri ya substitution (DS), yomwe imatanthawuza kuchuluka kwa magulu a hydroxyl olowa m'malo pamtundu uliwonse wa shuga, imatha kuwongoleredwa kuti igwirizane ndi mawonekedwe a PAC pakugwiritsa ntchito mwapadera.
2.Katundu:
Kusungunuka kwamadzi: Chimodzi mwazinthu zazikulu za PAC ndi kusungunuka kwake m'madzi, komwe kumabwera chifukwa cha kuyambitsa magulu a anionic.Kusungunuka uku kumapangitsa PAC kukhala yosavuta kugwira ndikuphatikiza mumakina amadzi.
Rheological Control: PAC imadziwika ndi kuthekera kwake kosintha mawonekedwe amadzimadzi.Itha kukhala ngati thickening wothandizira, kukulitsa mamasukidwe akayendedwe ndikuwongolera kutuluka kwamadzi.Katunduyu ndiwofunika kwambiri m'mafakitale monga kubowola mafuta, komwe PAC imagwiritsidwa ntchito pobowola matope kuti chitsimecho chikhale chokhazikika komanso kuti madzi asatayike.
Filtration Control: PAC imathanso kugwira ntchito ngati chowongolera kusefera, kuthandiza kupewa kutayika kwa zolimba panthawi yosefera.Katunduyu ndi wopindulitsa m'mafakitale monga migodi ndi kuthira madzi oipa.
Kukhazikika kwa pH: PAC imawonetsa kukhazikika pamitundu yambiri ya pH, zomwe zimathandizira kusinthasintha kwake pamagwiritsidwe osiyanasiyana.
Kugwirizana: PAC imagwirizana ndi mitundu ina yamankhwala ndi zowonjezera zomwe zimagwiritsidwa ntchito m'mafakitale.
3.Mapulogalamu:
Makampani a Mafuta ndi Gasi: PAC imagwiritsidwa ntchito kwambiri m'makampani amafuta ndi gasi, makamaka pobowola madzi (matope).Imagwira ntchito ngati viscosifier, wowongolera kutaya kwamadzimadzi, komanso inhibitor ya shale, yomwe imathandizira kukhathamiritsa ntchito pobowola ndikusunga umphumphu.
Ntchito yomanga: M'makampani omanga, PAC imagwiritsidwa ntchito poyika simenti kuti iwonjezere mphamvu za matope a simenti.Imawonjezera pompopompo, imachepetsa kutayika kwamadzimadzi, komanso imathandizira kulimba kwa simenti.
Pharmaceuticals: PAC imapeza ntchito m'zamankhwala ngati zomangira pakupanga mapiritsi komanso ngati viscosity modifier mumadzimadzi.
Chakudya ndi Chakumwa: M’makampani azakudya ndi zakumwa, PAC imagwiritsidwa ntchito ngati chokhazikika, chokhuthala, komanso chokometsera zinthu zosiyanasiyana, kuphatikiza ma sosi, mavalidwe, ndi mkaka.
Zopangira Zosamalira Munthu: PAC imaphatikizidwa muzinthu zosamalira anthu monga ma shampoos, zowongolera, ndi mafuta odzola chifukwa cha kukhuthala kwake komanso kukhazikika.
Chithandizo cha Madzi: PAC imagwiritsidwa ntchito poyeretsa madzi ngati flocculant ndi coagulant yothandizira kuchotsa zolimba zomwe zayimitsidwa ndi zinthu zamoyo m'madzi.
4. Kuganizira za chilengedwe:
Ngakhale PAC imapereka zabwino zambiri pamafakitale, kupanga ndi kugwiritsa ntchito kwake kungayambitse nkhawa zachilengedwe.Kusintha kwa mankhwala a cellulose kuti apange PAC nthawi zambiri kumaphatikizapo kugwiritsa ntchito ma reagents ndi njira zopangira mphamvu zambiri.Kuphatikiza apo, kutayidwa kwa zinthu zomwe zili ndi PAC kungathandizire kuwononga chilengedwe ngati njira zoyendetsera zinyalala sizitsatiridwa.Chifukwa chake, kuyesayesa kuli mkati kuti apange njira zokhazikika zopangira PAC komanso kulimbikitsa kubwezereranso kapena kuwononga zachilengedwe kwa zinthu zochokera ku PAC.
Kufunika kwa cellulose ya polyanionic kukuyembekezeka kupitiliza kukula m'mafakitale osiyanasiyana chifukwa cha kusinthasintha kwake komanso ntchito zosiyanasiyana.Zoyeserera za kafukufuku zikuyang'ana kwambiri kupititsa patsogolo magwiridwe antchito ndi kukhazikika kwa PAC, kuwunika njira zoyambira zatsopano, ndikupanga njira zina zokomera chilengedwe.Kuphatikiza apo, pali chidwi chochulukirapo pakugwiritsa ntchito PAC m'magawo omwe akubwera monga biomedicine ndi mphamvu zongowonjezwdwa.Ponseponse, ma cellulose a polyanionic akadali polima wamtengo wapatali komanso wofunikira kwambiri m'mafakitale amakono, ndikupita patsogolo komwe kumafuna kukulitsa ntchito zake ndikuchepetsa momwe chilengedwe chimakhalira.
polyanionic cellulose (PAC) ndi chochokera ku cellulose chosinthidwa ndi mankhwala chokhala ndi zinthu zapadera zomwe zimapangitsa kuti zikhale zamtengo wapatali m'mafakitale osiyanasiyana.Kuchokera pakulimbikitsa mphamvu zamadzimadzi pobowola mafuta mpaka kuwongolera magwiridwe antchito amankhwala, PAC imagwira ntchito yofunika kwambiri m'magawo ambiri.Komabe, monga momwe zimakhalira ndi mankhwala aliwonse, ndikofunikira kuganizira za chilengedwe pakupanga ndi kugwiritsa ntchito kwa PAC ndikugwira ntchito kuti ipeze mayankho okhazikika.Ngakhale zovuta, kufufuza kosalekeza ndi zatsopano zikupitiriza kukulitsa luso ndi ntchito za cellulose ya polyanionic, kuonetsetsa kuti ikugwirizana ndi mafakitale osiyanasiyana kwa zaka zikubwerazi.
Nthawi yotumiza: Mar-28-2024