Kodi pali kusiyana kotani pakati pa magwiridwe antchito a methyl cellulose ether ndi lignin fiber

Kodi pali kusiyana kotani pakati pa magwiridwe antchito a methyl cellulose ether ndi lignin fiber

Yankho: Kuyerekeza kwa magwiridwe antchito pakati pa methyl cellulose ether ndi lignin fiber kukuwonetsedwa patebulo

 Kuyerekeza kwa magwiridwe antchito pakati pa methyl cellulose ether ndi lignin fiber

Kodi muyenera kuyang'ana chiyani mukamagwiritsa ntchito methyl cellulose ndi carboxymethyl cellulose?

Yankho: (1) Mukamagwiritsa ntchito madzi otentha kusungunula cellulose, iyenera kukhazikika bwino musanagwiritse ntchito. Kutentha kofunikira kuti kusungunuke kwathunthu ndi kuwonekera koyenera kumadalira mtundu wa cellulose.

(2) Kutentha kumafunika kuti mupeze kukhuthala kokwanira

Carboxymethylcellulose≤25℃, methylcellulose≤20℃

(3) Pang'onopang'ono ndi mofanana sieve cellulose m'madzi, ndikugwedeza mpaka tinthu tating'ono tating'ono tanyowa, ndiyeno gwedezani mpaka njira yonse ya cellulose ikuwonekera bwino komanso yomveka bwino. Musathire madzi mwachindunji mu cellulose, ndipo musawonjezere mwachindunji kuchuluka kwa cellulose yomwe yatsitsidwa ndikupangidwa kukhala zotupa kapena mipira mumtsuko.

(4) Phala la cellulose lisanayambe kunyowetsedwa ndi madzi, musawonjezere zinthu zamchere kusakaniza, koma mutatha kubalalitsidwa ndi kuthira, madzi ochepa a alkaline (pH8 ~ 10) akhoza kuwonjezeredwa kuti apititse patsogolo kusungunuka. Zomwe zingagwiritsidwe ntchito ndi: sodium hydroxide aqueous solution, sodium carbonate aqueous solution, sodium bicarbonate aqueous solution, laimu madzi, ammonia madzi ndi organic ammonia, etc.

(5) Ether yopangidwa ndi cellulose imakhala ndi dispersibility bwino m'madzi ozizira. Ngati izo zawonjezeredwa mwachindunji ku njira ya alkaline, chithandizo chapamwamba chidzalephera ndipo chimayambitsa condensation, choncho chisamaliro chiyenera kutengedwa.

Kodi methylcellulose ndi chiyani?

Yankho: (1) Ikatenthedwa pamwamba pa 200 ° C, imasungunuka ndi kuwola. Phulusa la phulusa limakhala pafupifupi 0.5% likawotchedwa, ndipo sililowerera likapangidwa kukhala slurry ndi madzi. Koma mamasukidwe akayendedwe ake, zimatengera mlingo wa polymerization.

(2) Kusungunuka m'madzi kumayenderana ndi kutentha, kutentha kwakukulu kumakhala ndi kusungunuka kochepa, kutentha kochepa kumakhala ndi kusungunuka kwakukulu.

(3) Ikhoza kusungunuka mu chisakanizo cha madzi ndi zosungunulira za organic, monga methanol, ethanol, ethylene glycol, glycerin ndi acetone.

(4) Pamene pali zitsulo zamchere kapena ma electrolyte organic mu njira yake yamadzimadzi, yankho likhoza kukhalabe lokhazikika. Electrolyte ikawonjezeredwa pamlingo waukulu, gel kapena mpweya udzachitika.

(5) Lili ndi zochitika zapamtunda. Chifukwa cha kukhalapo kwa magulu a hydrophilic ndi hydrophobic mu mamolekyu ake, ali ndi ntchito za emulsification, colloid yoteteza ndi kukhazikika kwa gawo.

(6) Kutentha kwamphamvu. Pamene njira yamadzimadzi ikukwera ku kutentha kwina (pamwamba pa kutentha kwa gel osakaniza), imakhala ya turbid mpaka gel osakaniza kapena kutentha, zomwe zimapangitsa kuti yankho liwonongeke, koma likhoza kubwerera ku chikhalidwe choyambirira pambuyo pozizira. Kutentha komwe ma gelation ndi mvula zimachitika zimatengera mtundu wa mankhwala, kuchuluka kwa yankho, komanso kuchuluka kwa kutentha.

(7) PH ndi yokhazikika. Kukhuthala kwa njira yamadzimadzi sikukhudzidwa mosavuta ndi asidi ndi zamchere. Pambuyo powonjezera kuchuluka kwa alkali, mosasamala kanthu za kutentha kwakukulu kapena kutentha kochepa, sikungayambitse kuwonongeka kapena kugawanika kwa unyolo.

(8) Pambuyo n'kuuma pamwamba, akhoza kupanga mandala, amphamvu ndi zotanuka filimu, amene kugonjetsedwa ndi organic solvents, mafuta ndi mafuta osiyanasiyana. Simatembenukira chikasu kapena fluffy ikayatsidwa ndi kuwala, ndipo imatha kusungunukanso m'madzi. Ngati formaldehyde iwonjezeredwa ku yankho kapena kuthandizidwa ndi formaldehyde, filimuyo imakhala yosasungunuka m'madzi, koma imatha kukula pang'ono.

(9)Kukhuthala. Ikhoza kulimbitsa madzi ndi machitidwe opanda madzi, ndipo imakhala ndi ntchito yabwino yotsutsa-sag.

(10)Viscosity. Njira yake yamadzimadzi imakhala ndi mgwirizano wamphamvu, womwe ukhoza kupititsa patsogolo mgwirizano wa simenti, gypsum, utoto, pigment, wallpaper, etc.

(11)Kuyimitsidwa. Angagwiritsidwe ntchito kulamulira coagulation ndi mpweya wa particles olimba.

(12) Tetezani colloid ndikuwongolera kukhazikika kwa colloid. Zitha kuteteza kudzikundikira ndi coagulation wa m'malovu ndi inki, ndi bwino kuteteza mpweya.

(13) kusunga madzi. Njira yamadzimadzi imakhala ndi kukhuthala kwakukulu. Akawonjezeredwa kumatope, amatha kukhala ndi madzi ochuluka, omwe amalepheretsa kuyamwa kwambiri kwa madzi ndi gawo lapansi (monga njerwa, konkire, ndi zina zotero) ndi kuchepetsa kuthamanga kwa madzi.

(14) Monga njira zina colloidal, izo olimba ndi tannins, precipitants mapuloteni, silicates, carbonates, etc.

(15) Itha kusakanikirana ndi carboxymethyl cellulose mugawo lililonse kuti ipeze zotsatira zapadera.

(16) Kusungidwa kwa yankho ndikwabwino. Ngati ikhoza kusungidwa yaukhondo pokonzekera ndi kusunga, ikhoza kusungidwa kwa milungu ingapo popanda kuwola.

ZINDIKIRANI: Methylcellulose si njira yokulirapo ya tizilombo tating'onoting'ono, koma ngati itaipitsidwa ndi tizilombo tating'onoting'ono, sizingawaletse kuchulukitsa.Ngati yankho litenthedwa kwa nthawi yayitali, makamaka pamaso pa asidi, mamolekyu a unyolo amathanso kugawanika, ndipo mamasukidwe akayendedwe adzachepa pa nthawi ino. Zingayambitsenso kugawanika kwa oxidizing agents, makamaka muzitsulo zamchere.

Kodi zotsatira zazikulu za carboxymethyl cellulose (CMC)) pa gypsum ndi chiyani?

Yankho: Carboxymethyl cellulose (CMC) makamaka imagwira ntchito yokulitsa ndi zomatira, ndipo kusungirako madzi sikudziwika. Ngati atagwiritsidwa ntchito limodzi ndi wosungira madzi, amatha kulimbitsa ndi kulimbitsa gypsum slurry ndikuwongolera ntchito yomanga, koma carboxymethyl cellulose Ma cellulose oyambira amatha kulepheretsa kuyika kwa gypsum, kapena osalimba, ndipo mphamvu idzatsika kwambiri. , kotero kuchuluka kwa ntchito kuyenera kuyendetsedwa mosamalitsa.