Cellulose Acetate, CA a takaice.Cellulose Acetate wani nau'i ne na fiber na mutum, wanda aka raba zuwa fiber diacetate da fiber triacetate. Fiber ɗin sinadari an yi shi ne da cellulose, wanda aka canza shi zuwa acetate cellulose ta hanyar sinadarai. An fara shirya shi a cikin 1865 azaman acetate cellulose. Guduro ne na thermoplastic da aka samu ta hanyar esterification na cellulose tare da acetic acid ko acetic anhydride ƙarƙashin aikin mai kara kuzari. polymer halitta ce da aka gyara ta hanyar sinadarai da aka samu ta hanyar esterification na hydroxyl a cikin kwayoyin cellulose tare da acetic acid. Ayyukansa ya dogara da matakin acetylation.

01. Rarraba CA

Ana iya raba cellulose zuwa fiber diacetate da fiber triacetate bisa ga matakin maye gurbin hydroxy ta ƙungiyar acetyl.

Diacetic acid an kafa shi ne bayan wani bangare na hydrolysis na nau'in acetate I, kuma digirinsa na esterification ya yi ƙasa da na nau'in acetate na III. Don haka, aikin dumama ya yi ƙasa da na vinegar uku, aikin rini ya fi na vinegar uku, kuma yawan shayar da danshi ya fi na vinegar uku.

Triacetic acid shine nau'in acetate tare da babban digiri na esterification ba tare da hydrolysis ba. Saboda haka, yana da ƙarfi mai ƙarfi da juriya na zafi, rashin aikin rini da ƙarancin ɗanɗano (wanda kuma aka sani da dawo da danshi).

A cikin tsarin kwayoyin halitta na fiber acetate, ƙungiyar hydroxyl akan zoben glucose na cellulose an maye gurbinsu da ƙungiyar acetyl don samar da ester bond. Matsayin esterification na fiber diacetate yana ƙasa da na fiber triacetate saboda hydrolysis. Diacetate fiber yana da babban yanki na amorphous a cikin tsarin supramolecular, yayin da fiber triacetate yana da wani tsari na crystalline, da kuma daidaitawa, daidaitawa da crystallinity na fiber macromolecules sun fi girma fiye da fiber diacetate.

02. Abubuwan da ke cikin fiber acetate

Abubuwan sinadaran

1. Juriya na Alkali

Wakilin alkali mai rauni bai haifar da lalacewa ga fiber acetate ba, kuma yawan asarar nauyi na fiber ya kasance kaɗan. Bayan cin karo da alkali mai ƙarfi, musamman fiber diacetate, yana da sauƙi don deacetylate, yana haifar da asarar nauyi, ƙarfi da haɓakawa suma suna raguwa. Sabili da haka, ƙimar pH na maganin maganin acetate fiber bai kamata ya wuce 7.0 ba. A karkashin daidaitaccen yanayin wanka, yana da ƙarfi juriya na chlorine, kuma ana iya bushe shi da tetrachlorethylene.

2. Juriya ga kwayoyin kaushi

Cellulose acetate an narkar da gaba daya a cikin acetone, DMF da glacial acetic acid, amma ba a cikin ethanol da tetrachlorethylene. Dangane da waɗannan halayen, ana iya amfani da acetone azaman kaushi mai ƙarfi na fiber acetate, kuma ana iya amfani da tetrachlorethylene don bushe bushewar masana'anta na fiber acetate.

3. Acid juriya

CA yana da kyakkyawan kwanciyar hankali na juriya acid. Sulfuric acid na yau da kullun, hydrochloric acid da acid nitric ba zai shafi ƙarfi, haske da haɓakar fiber a cikin takamaiman kewayon taro ba; Amma ana iya narkar da shi a cikin sulfuric acid mai mai da hankali, mai mai da hankali hydrochloric acid da nitric acid.

4. Rini

Ko da yake an samo filayen acetate daga cellulose, babban ɓangare na ƙungiyoyin polar hydroxyl a kan zoben glucose na cellulose ana maye gurbinsu da ƙungiyoyin acetyl don samar da esters a lokacin esterification. Saboda haka, rini da aka saba amfani da su don rini zaruruwan cellulose ba su da kusan alaƙa ga zaruruwan acetate kuma suna da wahalar rina. Rini mafi dacewa don zaren acetate sune ƙananan nauyin kwayoyin tarwatsa rini mai kama da rini.

Fiber Acetate ko masana'anta da aka rina tare da rinannun tarwatsewa yana da launi mai haske, sakamako mai kyau na daidaitawa, ƙimar ɗaukar rini mai girma, saurin launi da cikakken chromatography.

dukiya ta jiki

1. CA ba wai kawai yana da wasu shayarwar ruwa ba, amma har ma yana da dukiya na saurin cirewa bayan shayarwar ruwa

2. Zaman lafiyar thermal na fiber acetate yana da kyau. Gilashin miƙa mulki zafin jiki na fiber ne game da 185 ℃, da narkewa zafin jiki ne game da 310 ℃. A ƙarshen tashin zafin jiki, ƙimar asarar nauyi na fiber shine 90.78%; Ƙarfin karya na fiber acetate shine 1.29 cN/dtex, yayin da nau'in shine 31.44%.

3. Girman CA yana da ƙananan fiye da na viscose fiber, wanda ke kusa da na polyester fiber; Ƙarfin shine mafi ƙasƙanci na zaruruwa uku.

4. CA yana da inganci mai kyau, kama da siliki da ulu

5. Rushewar ruwan tafasa yana da ƙasa, amma babban maganin zafin jiki zai shafi ƙarfi da haske na fiber, don haka zafin jiki kada ya wuce 85 ℃.

Amfanin Cellulose Acetate

1.Diacetate fiber yana da kyau iska permeability da anti-static dukiya

A cikin mahalli mai zafi na 65%, diacetate yana da ɗanɗano iri ɗaya da auduga, kuma yana da aikin bushewa da sauri fiye da auduga, don haka yana iya ɗaukar tururin ruwa da jikin ɗan adam ke fitar da shi sosai kuma yana fitar da shi a lokaci guda. Don mutane su ji dadi. A lokaci guda kuma, kyakkyawan aikin shayar da danshi zai iya rage tarin wutar lantarki, wanda ba shi da sauƙi don samar da wutar lantarki.

2. Diacetate fiber yana da laushi mai laushi

Modules na farko yana da ƙasa, kuma fiber yana da rauni kuma mai sauƙi a ƙarƙashin aikin ƙananan kaya, yana nuna hali mai laushi, don haka fata yana da laushi da jin dadi. Amma idan yanayin farko ya yi ƙasa sosai, zai yi rauni.

Modules na farko yana da girma, kuma fiber ɗin yana da ƙarfi kuma ba shi da sauƙin lanƙwasa ƙarƙashin aikin ƙaramin kaya, yana nuna hali mai tsauri.

3. Diacetate fiber yana da fice aikin deodorization

Me yasa masana'anta acetate ke da kyan gani?

1. Diacetate fiber yana da laushi mai laushi kamar lu'u-lu'u

Sashin giciye na siliki na Mulberry alwatika ne mara ka'ida, kuma sashin giciye na fiber acetate concave convex ne mara ka'ida. Dukansu biyun suna da ratsi na tsayin daka a sassansu na tsaye, wanda ke sa haskensu mai jujjuyawar yaduwa da hasken mai tsayi. Ma'anar refractive yana da ƙasa, 1.48. Don haka siliki na Mulberry kuma yana ba da haske mai laushi kamar lu'u-lu'u.

2. Cellulose acetate yana da kyau kwarai

Modules na farko na fiber shine 30-45cn/dtex, rashin ƙarfi yana da rauni, sashin giciye ba daidai ba ne concave convex, masana'anta yana da taushi, kuma jin daɗin ji yana da kyau.

3. Diacetate fiber yana da launuka masu haske da saurin launi

Acetate fiber launi, cikakken chromatography, cikakke kuma mai tsabta launi, kyakkyawan launi mai launi.

4. Acetate fiber yana da kwanciyar hankali mai kyau

Vinegar fiber yana da ƙananan haɓaka zuwa ruwa, don haka yana da kwanciyar hankali mai kyau bayan an yi shi cikin masana'anta don kula da kyawawan tufafi.

5. Diacetate fiber yana da ingantacciyar kaddarorin antifouling

Don datti tare da ƙura, ruwa da mai, ba shi da sauƙi don gurɓata da sauƙin tsaftacewa