Uthini umahluko phakathi kokusebenza kwe-methyl cellulose ether kunye ne-lignin fiber

Uthini umahluko phakathi kokusebenza kwe-methyl cellulose ether kunye ne-lignin fiber

Impendulo: Ukuthelekisa ukusebenza phakathi kwe-methyl cellulose ether kunye ne-lignin fiber iboniswe kwitheyibhile

 Ukuthelekisa ukusebenza phakathi kwe-methyl cellulose ether kunye ne-lignin fiber

Yintoni ekufuneka ihoywe xa usebenzisa i-methyl cellulose kunye ne-carboxymethyl cellulose?

Impendulo: (1) Xa usebenzisa amanzi ashushu ukunyibilikisa i-cellulose, kufuneka ipholiswe ngokupheleleyo ngaphambi kokusetyenziswa. Ubushushu obufunekayo ukuchithwa ngokupheleleyo kunye nokungafihli okufanelekileyo kuxhomekeke kuhlobo lweselulosi.

(2) Ubushushu obufunekayo ukufumana i-viscosity eyaneleyo

Carboxymethylcellulose≤25℃, methylcellulose≤20℃

(3) Kancinci kwaye ulungelelanise i-cellulose emanzini, kwaye ugxobhoze de kube zonke iinqununu zifakwe, kwaye emva koko ugxobhoze de yonke isisombululo se-cellulose sibonakale ngokucacileyo kwaye sicace. Musa ukugalela amanzi ngokuthe ngqo kwi-cellulose, kwaye ungafaki ngokuthe ngqo inani elikhulu le-cellulose eliye lancitshiswa kwaye lenziwe ngamaqhuma okanye iibhola kwisitya.

(4) Ngaphambi kokuba i-powder cellulose ihlanjululwe ngamanzi, ungafaki izinto ze-alkali kumxube, kodwa emva kokusasazeka kunye nokucwiliswa, inani elincinci le-alkaline isisombululo se-aqueous (pH8 ~ 10) sinokudibaniswa ukukhawulezisa ukuchithwa. Ezo zingasetyenziswa zezi: sodium hydroxide aqueous solution, sodium carbonate aqueous solution, sodium bicarbonate aqueous solution, amanzi lime, amanzi ammonia kunye organic ammonia, njl.

5 Ukuba yongezwa ngokuthe ngqo kwisisombululo se-alkali, unyango olungaphezulu luya kuphumelela kwaye lubangele ukuxilisa, ngoko ke kufuneka kuthathelwe ingqalelo ngakumbi.

Ziziphi iimpawu ze-methylcellulose?

Impendulo: (1) Xa ishushu ngaphezu kwe-200 ° C, iyanyibilika kwaye ibole. Umxholo womlotha umalunga ne-0.5% xa utshiswa, kwaye awuthathi hlangothi xa usenziwa kwi-slurry ngamanzi. Ngokuphathelele i-viscosity yayo, kuxhomekeke kwinqanaba le-polymerization.

(2) Ukunyibilika emanzini kuhambelana ngokungafaniyo nobushushu, ubushushu obuphezulu bunokunyibilika okuphantsi, ubushushu obuphantsi bunokunyibilika okuphezulu.

(3) Inokuchithwa kumxube wamanzi kunye ne-organic solvents, njenge-methanol, i-ethanol, i-ethylene glycol, i-glycerin kunye ne-acetone.

(4) Xa kukho iityuwa zetsimbi okanye i-electrolyte ephilayo kwisisombululo sayo samanzi, isisombululo sisenokuhlala sizinzile. Xa i-electrolyte yongezwa kwisixa esikhulu, i-gel okanye imvula iya kwenzeka.

(5)Inomsebenzi ongaphezulu. Ngenxa yobukho bamaqela e-hydrophilic kunye ne-hydrophobic kwiimolekyuli zayo, inemisebenzi ye-emulsification, i-colloid yokukhusela kunye nokuzinza kwesigaba.

(6)Igelling eshushu. Xa isisombululo se-aqueous sinyuka kwiqondo lokushisa elithile (ngaphezu kweqondo lokushisa le-gel), liya kuba yi-turbid de i-gel okanye i-precipitate, ibangele ukuba isisombululo silahlekelwe yi-viscosity yayo, kodwa sinokubuyela kwimeko yokuqala emva kokupholisa. Iqondo lokushisa apho i-gelation kunye nemvula eyenzekayo ixhomekeke kuhlobo lwemveliso, ukuxinwa kwesisombululo, kunye nezinga lokufudumeza.

(7)I-pH izinzile. I-viscosity yesisombululo esinamanzi ayichaphazeli lula i-asidi kunye ne-alkali. Emva kokongeza inani elikhulu le-alkali, kungakhathaliseki ukuba ukushisa okuphezulu okanye ukushisa okuphantsi, akuyi kubangela ukubola okanye ukuhlukana kwekhonkco.

8 Ayijiki ibe tyheli okanye ibe bufuku xa ibekwe ekukhanyeni, kwaye inokuphinda inyibilike emanzini. Ukuba i-formaldehyde yongezwa kwisisombululo okanye emva kokunyangwa nge-formaldehyde, ifilimu ayinyibiliki emanzini, kodwa isenokwandisa ngokuyinxenye.

(9)Ukuqina. Iyakwazi ukujiya amanzi kunye neenkqubo ezingenamanzi, kwaye inokusebenza kakuhle kwe-anti-sag.

(10)I-Viscosity. Isisombululo saso samanzi sinokubambisana okuqinileyo, okunokuphucula ukuhambelana kwesamente, i-gypsum, ipende, i-pigment, iphepha lodonga, njl.

(11)Ukumiswa. Ingasetyenziselwa ukulawula i-coagulation kunye nemvula yamasuntswana aqinileyo.

(12)Khusela i-colloid kwaye uphucule ukuzinza kwe-colloid. Inokuthintela ukuqokelelana kunye nokujiya kwamathontsi kunye neepigments, kwaye ithintele ngokufanelekileyo imvula.

(13)ugcino lwamanzi. Isisombululo samanzi sine-viscosity ephezulu. Xa ifakwe kwi-mortar, inokugcina umxholo ophezulu wamanzi, okuthintela ngokufanelekileyo ukugqithiswa kwamanzi ngokugqithisileyo nge-substrate (njengezitena, ikhonkrithi, njl.) kunye nokunciphisa izinga lokunyuka kwamanzi.

(14) Njengezinye izisombululo ze-colloidal, ziqiniswa yi-tannins, i-protein precipitants, i-silicates, i-carbonates, njl.

(15)Inokuxutywa kunye ne-carboxymethyl cellulose nakweyiphi na inxalenye yokufumana iziphumo ezizodwa.

(16)Ukugcinwa kokusebenza kwesisombululo kulungile. Ukuba inokugcinwa icocekile ngexesha lokulungiselela nokugcinwa kwayo, inokugcinwa iiveki eziliqela ngaphandle kokubola.

QAPHELA: I-Methylcellulose ayikho indawo yokukhula ye-microorganisms, kodwa ukuba ihlanjululwe nge-microorganisms, ayiyi kubathintela ukuba baphindaphindeke.Ukuba isisombululo sishushu ixesha elide, ngakumbi phambi kwe-asidi, i-molecule ye-chain ingaphinda ihlukane. kwaye i-viscosity iya kuncipha ngeli xesha. Kwakhona kunokubangela ukuhlukana kwi-oxidizing agents, ngakumbi kwiisombululo ze-alkaline.

Yintoni eyona mpembelelo iphambili ye-carboxymethyl cellulose (CMC) kwigypsum?

Impendulo: I-Carboxymethyl cellulose (CMC) ikakhulu idlala indima yokuqina kunye nokunamathela, kwaye umphumo wokugcinwa kwamanzi awubonakali. Ukuba isetyenziswe ngokudibeneyo kunye ne-arhente yokugcina amanzi, inokunyusa kwaye ikhulise i-gypsum slurry kwaye iphucule ukusebenza kolwakhiwo, kodwa i-carboxymethyl cellulose I-cellulose yesiseko iya kubambezela ukusekwa kwegypsum, okanye ingaqini, kwaye amandla aya kuhla kakhulu. , ngoko ke ixabiso lokusetyenziswa kufuneka lilawulwe ngokungqongqo.