Polyanionic cellulose (PAC) wani nau'in cellulose ne mai narkewa da ruwa wanda ke da nau'ikan aikace-aikace a masana'antu daban-daban, musamman a fannin hako ruwa a masana'antar mai da iskar gas.An san shi don kyawawan kaddarorin rheological, babban kwanciyar hankali da daidaituwa tare da sauran abubuwan ƙari.Samar da cellulose na polyanionic ya ƙunshi matakai da yawa, gami da hakar cellulose, gyare-gyaren sinadarai, da tsarkakewa.
1. Ciwon cellulose:
Abun farawa don polyanionic cellulose shine cellulose, polymer na halitta wanda aka samo a cikin ganuwar tantanin halitta.Ana iya samun cellulose daga kayan shuka daban-daban, irin su ɓangaren litattafan almara, auduga, ko wasu tsire-tsire masu fibrous.Tsarin hakar ya ƙunshi matakai masu zuwa:
A. Shirye-shiryen albarkatun kasa:
An riga an shirya kayan shuka da aka zaɓa don cire ƙazanta irin su lignin, hemicellulose da pectin.Yawanci ana yin wannan ta hanyar haɗakar magunguna da magunguna.
b.Rushewa:
Abubuwan da aka riga aka gyara sai a juye su, tsarin da ke rushe zaruruwan cellulose.Hanyoyin juzu'i na yau da kullun sun haɗa da kraft pulping da sulfite pulping, kowanne yana da fa'ida da rashin amfaninsa.
C. Rarraba cellulose:
Ana sarrafa kayan ɓangaren litattafan almara don raba zaruruwan cellulosic.Wannan yawanci ya ƙunshi aikin wankewa da aikin bleaching don samun kayan aikin cellulosic mai tsabta.
2. Gyaran sinadarai:
Da zarar an sami cellulose, an canza shi ta hanyar sinadarai don gabatar da ƙungiyoyin anionic, yana mai da shi zuwa cellulose polyanionic.Hanyar da aka saba amfani da ita don wannan dalili shine etherification.
A. Etherification:
Etherification ya ƙunshi amsawar cellulose tare da wakili na etherifying don gabatar da haɗin gwiwar ether.A cikin yanayin cellulose na polyanionic, yawanci ana gabatar da ƙungiyoyin carboxymethyl.Ana samun wannan ta hanyar amsawa tare da sodium monochloroacetate a gaban mai haɓakawa na asali.
b.Halin Carboxymethylation:
Halin carboxymethylation ya ƙunshi maye gurbin hydrogen atom akan ƙungiyoyin hydroxyl na cellulose tare da ƙungiyoyin carboxymethyl.Wannan halayen yana da mahimmanci don ƙaddamar da cajin anionic akan kashin bayan cellulose.
C. neutralize:
Bayan carboxymethylation, samfurin ya zama neutralized don canza ƙungiyar carboxymethyl zuwa ions carboxylate.Wannan matakin yana da mahimmanci don sanya polyanionic cellulose ruwa mai narkewa.
3. Tsarkakewa:
Sa'an nan kuma ana tsabtace cellulose da aka gyara don cire samfuran da ba a yi amfani da su ba, da sinadarai marasa ƙarfi, da duk wani ƙazanta wanda zai iya shafar aikin sa a cikin takamaiman aikace-aikacen.
A. wanka:
Ana tsaftace samfuran sosai don cire abubuwan da suka wuce kima, gishiri da sauran ƙazanta.Ana yawan amfani da ruwa don wannan dalili.
b.bushewa:
Za a bushe polyanionic cellulose mai tsabta don samun samfurin ƙarshe a cikin foda ko granular form.
4. Kula da inganci:
Ana aiwatar da matakan kula da ingancin a duk cikin tsarin masana'anta don tabbatar da cewa cellulose polyanionic da aka samu ya dace da ƙayyadaddun da ake buƙata.Wannan ya ƙunshi gwada nauyin kwayoyin halitta, matakin maye gurbin da sauran sigogi masu dacewa.
5. Aikace-aikace:
Polyanionic cellulose yana da aikace-aikace a cikin masana'antu daban-daban, da farko a cikin tsarin hako ruwa a sashin mai da iskar gas.Yana aiki azaman tackifier, wakili na sarrafa asarar ruwa da mai hana shale, yana haɓaka aikin ruwan hakowa gaba ɗaya.Sauran aikace-aikacen sun haɗa da masana'antar abinci da magunguna inda ƙarancin ruwa da kaddarorin rheological ke ba da fa'ida.
Polyanionic cellulose wani nau'i ne mai mahimmanci kuma mai mahimmanci na cellulose wanda samarwarsa yana buƙatar matakan matakai masu kyau.Cire cellulose daga kayan shuka, gyare-gyaren sinadarai ta hanyar etherification, tsarkakewa da kula da inganci sune sassa na tsarin masana'antu.Sakamakon polyanionic cellulose shine mabuɗin mahimmanci a cikin aikace-aikacen masana'antu iri-iri, yana taimakawa wajen haɓaka aiki da aiki na ƙira daban-daban.Yayin da masana'antu ke ci gaba da haɓakawa, ana sa ran buƙatun samfuran cellulose na musamman kamar su polyanionic cellulose ana tsammanin haɓaka, haɓaka ci gaba da bincike da haɓakawa a cikin fasahohin gyare-gyaren cellulose da aikace-aikace.
Lokacin aikawa: Dec-26-2023