Polyanionic cellulose (PAC) ke eng?

Polyanionic cellulose (PAC) ke motsoako o entsoeng ka lik'hemik'hale oa cellulose, e leng polima ea tlhaho e fumanehang maboteng a lisele tsa limela. Cellulose e entsoe ka li-unit tse pheta-phetoang tsa tsoekere tse hokahantsoeng ka li-bond tsa beta-1,4-glycosidic, tse etsang liketane tse telele. Ke e 'ngoe ea metsoako ea lintho tse phelang tse ngata ka ho fetisisa Lefatšeng 'me e sebetsa e le karolo ea sebopeho sa limela. Polyanionic cellulose e entsoe ka selulose ka letoto la liphetoho tsa lik'hemik'hale tse hlahisang lihlopha tsa anionic mokokotlong oa cellulose. Lihlopha tsena tsa anionic li fa PAC thepa ea eona e ikhethang le ho e etsa ea bohlokoa lits'ebetsong tse fapaneng tsa indasteri.

1. Sebopeho sa Lik'hemik'hale le Ts'ebetso:
Polyanionic cellulose e hlahisoa ke etherification kapa esterification ea selulose. Nakong ea etherification, lihlopha tsa hydroxyl (-OH) ka liketane tsa cellulose li nkeloa sebaka ke lihlopha tsa ether, hangata lihlopha tsa carboxymethyl (-CH2COOH) kapa carboxyethyl (-CH2CH2COOH). Ts'ebetso ena e hlahisa litefello tse mpe mokokotlong oa selulose, e etsa hore e qhibilihe ka metsing 'me e be le qoso e mpe ka kakaretso. The degree of substitution (DS), e bolelang palo-hare ea palo ea lihlopha tsa hydroxyl tse nketsoeng sebaka ka yuniti ea tsoekere, e ka laoloa ho lokisa thepa ea PAC bakeng sa lits'ebetso tse ikhethileng.

2. Properties:
Ho qhibiliha ha Metsi: E 'ngoe ea lintho tse ka sehloohong tsa PAC ke ho qhibiliha ha eona ha metsi, ho hlahang ho kenyelletsoeng ha lihlopha tsa anionic. Sollubility ena e etsa hore PAC e be bonolo ho sebetsana le eona le ho e kenyelletsa lits'ebetsong tse nang le metsi.
Taolo ea Rheological: PAC e tsejoa ka bokhoni ba eona ba ho fetola thepa ea rheological ea maro. E ka sebetsa e le sesebelisoa se teteaneng, se matlafatsang viscosity le ho laola phallo ea mokelikeli. Thepa ena e bohlokoa haholo liindastering tse kang ho cheka oli, moo PAC e sebelisetsoang ho cheka seretse ho boloka botsitso ba hantle le ho laola tahlehelo ea mokelikeli.
Taolo ea ho Filtration: PAC e ka boela ea sebetsa e le moemeli oa ho laola ho hloekisa, ho thusa ho thibela tahlehelo ea lintho tse tiileng nakong ea ts'ebetso ea ho hloekisa. Thepa ena e molemo liindastering tse kang tsa merafo le ho hloekisa metsi a litšila.
pH botsitso: PAC e bonts'a botsitso holim'a mefuta e mengata ea pH, e thusang ho feto-fetoha ha eona lits'ebetsong tse fapaneng.
Tšebelisano: PAC e lumellana le mefuta e mengata ea lik'hemik'hale le li-additives tse sebelisoang hangata lits'ebetsong tsa indasteri.

3. Likopo:
Indasteri ea Oli le Khase: PAC e sebelisoa haholo indastering ea oli le khase, haholo marong a ho cheka (liretse). E sebetsa e le viscosifier, moemeli oa taolo ea tahlehelo ea mokelikeli, le shale inhibitor, e thusang ho ntlafatsa ts'ebetso ea ho cheka le ho boloka bots'epehi bo botle.
Kaho: Ka indastering ea kaho, PAC e hiroa ho kenya likopo tsa samente ho ntlafatsa thepa ea rheological ea li-slurries tsa samente. E ntlafatsa pompo, e fokotsa tahlehelo ea mokelikeli, 'me e matlafatsa matla a bond ea samente.
Pharmaceuticals: PAC e fumana lits'ebetso mekhoeng ea litlama e le tlamahano tlhahisong ea matlapa le joalo ka se fetolang viscosity mekhoeng ea mokelikeli.
Lijo le Seno: Indastering ea lijo le lino, PAC e sebelisoa e le ntho e tiisang matla, e tenya, le emulsifier lihlahisoa tse fapaneng, ho kenyeletsoa li-sauces, litlolo le lihlahisoa tsa lebese.
Lihlahisoa tsa Tlhokomelo ea Motho: PAC e kenyellelitsoe lihlahisoa tsa tlhokomelo ea motho joalo ka li-shampoo, li-conditioner, le litlolo bakeng sa thepa ea eona e teteaneng le e tsitsitseng.
Phekolo ea Metsi: PAC e sebelisoa lits'ebetsong tsa ho hloekisa metsi e le thuso ea flocculant le coagulant bakeng sa ho tlosoa ha lintho tse tiileng le lintho tse phelang metsing.

4. Litlhokomelo tsa Tikoloho:
Le ha PAC e fana ka melemo e mengata lits'ebetsong tsa indasteri, tlhahiso le ts'ebeliso ea eona li ka hlahisa mathata a tikoloho. Phetoho ea lik'hemik'hale ea selulose ho hlahisa PAC hangata e kenyelletsa ts'ebeliso ea li-reagents le lits'ebetso tse hlokang matla. Ho feta moo, ho lahloa ha lihlahisoa tse nang le PAC ho ka kenya letsoho tšilafalong ea tikoloho haeba mekhoa e nepahetseng ea taolo ea litšila e sa lateloe. Ka hona, boiteko bo ntse bo tsoela pele ho theha mekhoa e tšoarellang haholoanyane bakeng sa ho kopanya PAC le ho khothaletsa ho sebelisoa hape kapa ho senyeha ha lihlahisoa tsa lihlahisoa tse thehiloeng ho PAC.

Tlhokahalo ea cellulose ea polyanionic e lebelletsoe ho tsoela pele ho hola liindastering tse fapaneng ka lebaka la thepa ea eona e fapaneng le lits'ebetso tse fapaneng. Boiteko ba lipatlisiso bo tsepamisitse maikutlo ho ntlafatseng ts'ebetso le ts'ebetso ea PAC, ho lekola litsela tse ncha tsa ho kopanya, le ho nts'etsapele mekhoa e meng e sebelisang tikoloho. Ho feta moo, ho na le thahasello e ntseng e eketseha tšebelisong ea PAC masimong a ntseng a hlaha joalo ka biomedicine le matla a nchafalitsoeng. Ka kakaretso, cellulose ea polyanionic e ntse e le polymer ea bohlokoa le ea bohlokoa lits'ebetsong tsa morao-rao tsa indasteri, ka tsoelo-pele e tsoelang pele e reretsoeng ho ntlafatsa ts'ebeliso ea eona ha e ntse e fokotsa sebaka sa eona sa tikoloho.

polyanionic cellulose (PAC) ke motsoako oa selulose o fetotsoeng ka lik'hemik'hale o nang le thepa e ikhethang e etsang hore e be ea bohlokoa mefuteng e mengata ea liindasteri. Ho tloha ho ntlafatsa thepa ea mokelikeli ho chekang oli ho isa ho ho ntlafatsa ts'ebetso ea litlhare tsa meriana, PAC e bapala karolo ea bohlokoa makaleng a mangata. Leha ho le joalo, joalo ka sehlahisoa se seng le se seng sa lik'hemik'hale, ho bohlokoa ho nahana ka litlamorao tsa tikoloho tsa tlhahiso le ts'ebeliso ea PAC le ho sebeletsa ho fumana tharollo ea moshoelella. Ho sa tsotellehe mathata, lipatlisiso tse tsoelang pele le mekhoa e mecha li tsoela pele ho atolosa bokhoni le lisebelisoa tsa cellulose ea polyanionic, ho netefatsa bohlokoa ba eona liindastering tse sa tšoaneng bakeng sa lilemo tse tlang.