HEC maka nchacha

HEC Hydroxyethyl cellulose bụ ihe na-acha ọcha na-acha odo odo fibrous ma ọ bụ uzuzu siri ike. Na-adịghị egbu egbu, enweghị ụtọ. Ọ bụ cellulose nonionic ether, soluble na oyi na mmiri ọkụ n'ihi hydrophilic hydroxyethyl na molekul. Ngwọta mmiri ya nwere uru pH nke 6.5 ~ 8.5 ma kwụsie ike iji kpoo ọkụ. HEC nwere dị iche iche solubility dị ka ogo nke nnọchi (DS). Apụghị ịsacha n'ọtụtụ ihe mgbaze organic. Ọ nwere ihe onwunwe nke ndim, nkwusioru, adhesion, emulsification, dispersion na mmiri njigide, wdg, ma nwee ike ịkwadebe ngwọta dị iche iche viscosity ranges. Ọ nwere ezigbo solubility nnu na-adịghị ahụkebe na dielectric, a na-ahapụkwa ngwọta mmiri ya ka ọ nwee nnukwu nnu ma nọgide na-agbanwe agbanwe.

Hydroxyethyl cellulose HECmmepụta akụrụngwa

Isi akụrụngwa: cellulose obodo (owu staple ma ọ bụ obere pulp), mmiri mmiri alkali, ethylene oxide, ethylene diron (40%)

Sistemụ fiber Alkali bụ polymer eke, mgbanaka eriri ọ bụla nwere otu hydroxyl atọ, mmeghachi omume hydroxyl kacha arụ ọrụ iji mepụta hydroxyethyl cellulose. Wụnye ntụ ọka ntụ ntụ ma ọ bụ nri a nụchara anụcha n'ime 30% mmiri mmiri alkali maka ọkara otu awa wee pịa ya. Ghaa na 1: 2.8 nke mmiri alkaline, wee gwepịa ya. A na-etinye cellulose alkali a gbajiri agbaji n'ime kettle mmeghachi omume, mechie ya, kpochapu ya, jupụta na nitrogen, ma kpochaa ya ugboro ugboro ma jupụta na nitrogen iji dochie ikuku dị na ikpe ahụ. A na-etinye mmiri mmiri ethylene oxide nke emejuru oyi n'ime jaket reactor na mmiri jụrụ oyi, a na-achịkwa mmeghachi omume ya na ihe dịka 25C maka 2h iji nweta ngwaahịa hydroxyethyl fiber cable crude ngwaahịa. Ngwaahịa crude nwere mmanya na-aba n'anya ịsacha, tinye neutralization acetic acid na VLL 46, jean tinye glioxal crosslinking ịka nká. Mgbe ahụ, na-asa ahụ na mmiri, centrifugal dehydration, ihicha, egweri, hydroxyethyl cellulose.

1.1 mmiri mmiri alkali

Ngwaahịa dị ọcha bụ mmiri mmiri na-enweghị atụ. Njupụta nke ikwu 2. 130, ebe mgbaze 318.4C, ebe esi 1390C. Caustic soda na ahịa nwere okirikiri okirikiri. Na mmiri mmiri ụdị abụọ: dị ọcha siri ike caustic soda ọcha, flake, ngọngọ, granular na mkpara udi, cytoplasm: dị ọcha mmiri mmiri caustic soda na-akpọ mmiri mmiri alkali, enweghị colorless mmiri mmiri. Ngwaahịa ụlọ ọrụ nwere ihe ndị na-adịghị ọcha, tumadi sodium chloride na sodium carbonate, na mgbe ụfọdụ obere ígwè oxide.

1.2 ethylene oxide

Ethylene oxide bụ ngwakọta organic, usoro kemịkalụ C2H40, bụ carcinogen na-egbu egbu. Okpete Epoxy na-ere ọkụ ma na-agbawa agbawa, ọ dịghị mfe ibufe ebe dị anya, yabụ enwere mpaghara siri ike. A na-eji ya eme ihe n'ọtụtụ ebe n'ịsacha, ọgwụ, mbipụta na ụlọ ọrụ ịcha akwa. 3 oxyethane (E0) bụ mgbanaka mgbanaka kachasị mfe, bụ nke ogige heterocyclic, bụ ngwaahịa dị mkpa petrochemical. Ethylene oxide bụ mmiri mmiri na-enweghị agba na-enweghị atụ na obere okpomọkụ yana gas na-enweghị ụcha nke nwere isi na-esi ísì ụkwụ n'ime ụlọ okpomọkụ. Nrụgide ikuku nke gas dị elu ma nwee ike iru 141kPa na 30C. Nke a elu uzuoku mgbali na-ekpebi ike penetration nke epoxy z.alkane mgbe steaming. Ebe mgbaze (C): -112.2. Njupụta njikọ (mmiri -1): 0.8711

1.3 glycoxal

Yellow ribbed ma ọ bụ na-adịghị mma mgbe niile, na-atụgharị na-acha ọcha na jụrụ oyi.

Hydroxyethyl celluloseHEC mmepụtausoro

Tinyeowu staple ma ọ bụ a nụchara anụcha pulp na 30% lye. Wepu ma pịa. A na-egwepịa ya ma meghachi omume na ethylene oxide nke ajụburu oyi iji mepụta crude hydroxyethyl cellulose. Mgbe ahụ, saa mmanya na-aba n'anya ma gbakwunye acetic acid ka ịsacha na neutralize. Mgbe ahụ tinye glioxal crosslinking ịka nká, na-eji mmiri saa ngwa ngwa. N'ikpeazụ, mgbe centrifugation akpịrị ịkpọ nkụ, ihicha na egweri, okokụreHECa na-enweta ngwaahịa.

Usoro maka imepụta obere ntụHEChydroxyethyl cellulose site na-aga n'ihu ịsa usoro bụ nke teknuzu ubi nke ihe. Nsogbu teknụzụ a ga-edozi bụ inye usoro ịsa ahụ na-aga n'ihu na nrụpụta nrụpụta dị elu, obere mfu nke ihe mgbaze na ihe na-efu ọnụ iji mepụta obere ntụ.HEChydroxyethyl cellulose. Usoro nke usoro ịsa ahụ na-aga n'ihu iji mepụta obere ntụHEChydroxyethyl cellulose e ji mara na ndị a nzọụkwụ: A, crude hydroxyethyl cellulose na crosslinking gị n'ụlọnga agwakọtara, crosslinking ọgwụgwọ iji nweta slurry A; B. Tinye ihe mgbaze na slurry A nwetara na nzọụkwụ A iji nweta slurry B; C. Tinye slurry C enwetara na nzọụkwụ B n'ime rotary mgbali centrifuge wee nweta ala uyi hydroxyethyl cellulose mgbe na-aga n'ihu na-asachapụ. Usoro a nwere ike imeziwanye arụmọrụ na-arụ ọrụ nke ọma, na-emeziwanye nkwụsị nke ihe mgbaze na ihe onwunwe, ma belata ọdịnaya ash nke ngwaahịa, nke kwesịrị ekwesị maka mgbasa ozi na ngwa.