Aan soo bandhigo SAP-da aad aadka u xiisaynayso dhawaan!Waxay leedahay shaqo nuugista biyaha sare leh oo nuugta biyaha dhowr boqol ilaa dhowr kun oo jeer ka culus lafteeda, waxayna leedahay waxqabad biyo celin aad u fiican.Marka ay biyaha nuugaan oo ay bararaan biyo-galeenka, way adagtahay in la kala saaro biyaha xitaa haddii la cadaadiyo.Sidaa darteed, waxay leedahay adeegsi ballaaran oo dhinacyo kala duwan ah sida wax soo saarka nadaafadda shakhsi ahaaneed, wax soo saarka warshadaha iyo beeraha, iyo injineernimada madaniga ah.
Xabagta nuugista sare waa nooc ka mid ah makromolecules oo ay ku jiraan kooxo hydrophilic ah iyo qaab dhismeed isku xiran.Waxaa markii hore soo saaray Fanta iyo kuwa kale iyagoo ku tallaalay istaarijka polyacrylonitrile ka dibna saponifying.Sida laga soo xigtay alaabta ceeriin, waxaa jira taxane istaarijka (halkii, carboxymethylated, iwm), taxane cellulose (carboxymethylated, meeshoodii, iwm), taxane polymer synthetic (polyacrylic acid, polyvinyl alkohol, polyoxyethylene taxane, iwm) in dhowr qaybood. .Marka la barbardhigo istaarijka iyo cellulose, polyacrylic acid resin superabsorbent wuxuu leeyahay faa'iidooyin taxane ah sida kharashka wax soo saarka hooseeya, habka fudud, waxtarka wax soo saarka sare, awoodda nuugista biyaha xooggan, iyo cimriga alaabta oo dheer.Waxay noqotay goobta cilmi-baarista ee hadda jirta ee goobtan.
Waa maxay mabda'a alaabtan?Waqtigan xaadirka ah, polyacrylic acid ayaa 80% ka ah wax soo saarka resin-ka ee aadka u nuugaya.Xabagta aadka u nuugta guud ahaan waa korontolyte polymer ah oo ka kooban koox hydrophilic ah iyo qaab dhismeed isku xiran.Ka hor inta aan la nuugin biyaha, silsiladaha polymer-ka ayaa isku dhow oo isku dhafan, isku dhafan si ay u sameeyaan qaab-dhismeedka shabakad, si loo gaaro xiritaanka guud.Marka biyaha la taabto, molecules biyuhu waxay galaan resinka iyaga oo u maraya ficilka capillary iyo faafin, iyo kooxaha ionized ee silsiladda ah ayaa ku jira biyaha.Sababo la xiriira dib-u-celinta korantada ee u dhexeysa isla ion isku mid ah silsiladda, silsiladda polymer ayaa fidisa oo barara.Baahida dhexdhexaadnimada korantada awgeed, ions counter-ions uma guuri karaan bannaanka resin-ka, iyo farqiga u-fiirsashada ion ee u dhexeeya xalka gudaha iyo dibadda resin-ka ayaa sameeya cadaadis osmotic ah.Marka la eego ficil-celinta cadaadiska osmosis-ka, biyuhu waxay sii galaan resinka si ay u sameeyaan hydrogel.Isla mar ahaantaana, qaab-dhismeedka shabakadda isku-xiran iyo isku-xidhka hydrogen ee resin laftiisa ayaa xaddidaya ballaarinta aan xadidnayn ee jel.Marka biyuhu ka kooban yihiin qadar yar oo milix ah, cadaadiska osmotic-ga ee gadaal ayaa hoos u dhici doona, isla mar ahaantaana, sababtoo ah saameynta gaashaanka ee counter ion, silsiladda polymer ayaa yaraan doonta, taasoo keentay hoos u dhac weyn oo ku yimaada awoodda nuugista biyaha xabagta.Guud ahaan, awoodda nuugista biyaha ee resin super nuuga ee 0.9% NaCl xalku waa kaliya 1/10 ee biyaha deionized.nuugista biyuhu iyo haynta biyuhu waa laba dhinac oo isku dhib ah.Lin Runxiong iyo al.iyaga ka wada hadlay in thermodynamics.Heerkul gaar ah iyo cadaadis, xabagta dufanka badan ayaa si kedis ah u nuugi kara biyaha, biyuhuna waxay galaan resinka, iyagoo yareynaya xamaasada xorta ah ee nidaamka oo dhan ilaa ay ka gaarto dheellitirka.Haddii biyuhu ka baxsadaan resin, kordhinta enthalpy ee bilaashka ah, ma aha mid ku habboon xasilloonida nidaamka.Falanqaynta kulaylka kala duwani waxay muujinaysaa in 50% biyaha uu nuugo resinka super nuuga ay wali ku xidhan yihiin shabakada jel ee ka sareysa 150°C.Sidaa darteed, xitaa haddii cadaadiska lagu dhejiyo heerkulka caadiga ah, biyuhu kama baxsan doonaan resin-ka super nuuga, kaas oo lagu go'aamiyo sifooyinka thermodynamic ee resin super nuugista.
Marka xigta, u sheeg ujeedada gaarka ah ee SAP.
Waqtiga post: Dec-08-2021