Cellulose Acetate, CA maka mkpụmkpụ. Cellulose Acetate bụ ụdị eriri mmadụ mere, nke kewara n'ime eriri diacetate na eriri triacetate. A na-eme eriri kemịkalụ nke cellulose, nke a na-eme ka ọ bụrụ acetate cellulose site na usoro kemịkalụ. A kwadebere ya na 1865 dị ka acetate cellulose. Ọ bụ resin thermoplastic enwetara site na esterification nke cellulose na acetic acid ma ọ bụ acetic anhydride n'okpuru omume nke na-akpalite. Ọ bụ polymer eke gbanwetụrụ na kemịkalụ enwetara site na esterification nke hydroxyl n'ime mkpụrụ ndụ cellulose nwere acetic acid. Ọrụ ya dabere na ogo acetylation.

01. Nhazi nke CA

Enwere ike kewaa cellulose n'ime eriri diacetate na eriri triacetate dịka ogo nke nnọchi hydroxy site na otu acetyl.

A na-etolite acid diacetic mgbe akụkụ hydrolysis nke ụdị I acetate gasịrị, na ogo esterification ya dị ala karịa nke ụdị III acetate. Ya mere, ọkụ ọkụ na-arụ ọrụ dị ala karịa nke mmanya atọ ahụ, ọrụ ịcha akwa dị mma karịa nke mmanya atọ ahụ, na ntinye mmiri mmiri dị elu karịa nke mmanya atọ ahụ.

Triacetic acid bụ ụdị acetate nwere ogo esterification dị elu na-enweghị hydrolysis. Ya mere, ọ nwere ọkụ siri ike na nguzogide okpomọkụ, arụ ọrụ dyeing na-adịghị mma na obere mmiri absorption (nke a makwaara dị ka mmiri nwetaghachi).

N'ime usoro ihe omimi nke eriri acetate, otu acetyl nọchiri otu hydroxyl na mgbanaka glucose cellulose iji mepụta njikọ ester. Ogo esterification nke eriri diacetate dị ala karịa nke eriri triacetate n'ihi hydrolysis. Diacetate fiber nwere nnukwu mpaghara amorphous na usoro supramolecular, ebe eriri triacetate nwere usoro kristal ụfọdụ, na symmetry, oge na kristal nke fiber macromolecules dị elu karịa eriri diacetate.

02. Njirimara nke acetate fiber

Njirimara kemịkalụ

1. Alkali eguzogide

Onye na-ahụ maka alkali na-adịghị ike emeghị ka ọ ghara imebi eriri acetate, na ọnụ ọgụgụ dị arọ nke eriri ahụ dị ntakịrị. Mgbe ezutechara alkali siri ike, ọkachasị eriri diacetate, ọ dị mfe deacetylate, na-ebute oke ibu, ike na modulus na-ebelata. Ya mere, uru pH nke ngwọta maka ịgwọ eriri acetate ekwesịghị gafere 7.0. N'okpuru ọnọdụ ịsa ahụ ọkọlọtọ, ọ nwere nguzogide chlorine siri ike, yana enwere ike iji tetrachlorethylene sachaa ya.

2. Nguzogide organic mgbaze

A na-agbaze acetate cellulose kpamkpam na acetone, DMF na glacial acetic acid, mana ọ bụghị na ethanol na tetrachlorethylene. Dị ka njirimara ndị a si dị, enwere ike iji acetone dị ka ihe mgbaze nke acetate fiber, na tetrachlorethylene nwere ike iji mee ihe maka nhicha akọrọ nke akwa acetate fiber.

3. Acid eguzogide

CA nwere ezigbo nkwụsi ike acid. Sulfuric acid nkịtị, hydrochloric acid na nitric acid agaghị emetụta ike, ncha na elongation nke eriri n'ime ụfọdụ ntinye uche; Mana enwere ike igbari ya na sulfuric acid gbadoro anya, hydrochloric acid na nitric acid gbadoro anya.

4. Agba agba

Ọ bụ ezie na a na-enweta eriri acetate site na cellulose, nnukwu akụkụ nke polar hydroxyl dị na mgbanaka glucose cellulose na-anọchi anya otu acetyl iji mepụta esters n'oge esterification. Ya mere, e ji esiji ákwà ndị a na-ejikarị esiji eriri cellulose eme ihe fọrọ nke nta ka ọ bụrụ enweghị njikọ maka eriri acetate ma na-esi ike ịcha. A na-eji anya dị mma maka eriri acetate bụ ihe dị ala molecular na-akwụghachi wress na ọnụego ya.

Acetate fiber ma ọ bụ ákwà e ji esiji agbasasị agbasa nwere agba na-egbuke egbuke, mmetụta dị mma na-eme ka ọ dịkwuo mma, ọnụ ọgụgụ dị elu nke agba agba, agba agba agba na chromatography zuru ezu.

ihe onwunwe

1. CA ọ bụghị naanị nwere ụfọdụ ntinye mmiri, kamakwa ọ nwere ihe onwunwe nke iwepụ ngwa ngwa mgbe mmiri gbasasịrị

2. Nkwụsi ike nke okpomọkụ nke eriri acetate dị mma. The iko mgbanwe okpomọkụ nke eriri bụ banyere 185 ℃, na agbaze nchupu okpomọkụ bụ banyere 310 ℃. Na njedebe nke ịrị elu okpomọkụ, ọnụ ọgụgụ dị arọ nke eriri ahụ bụ 90.78%; Ike na-agbaji nke eriri acetate bụ 1.29 cN/dtex, ebe nje ahụ bụ 31.44%.

3. Njupụta nke CA dị ntakịrị karịa nke eriri viscose, nke dị nso na nke polyester fiber; Ike bụ nke kachasị ala nke eriri atọ ahụ.

4. CA nwere ịdị mma dị mma, dị ka silk na ajị anụ

5. Okpokoro mmiri na-esi nri dị ala, ma ọgwụgwọ okpomọkụ dị elu ga-emetụta ike na luster nke eriri, ya mere okpomọkụ ekwesịghị gafere 85 ℃.

Uru nke Cellulose Acetate

1.Diacetate eriri nwere ezigbo ikuku permeability na ihe mgbochi static

Na gburugburu ebe obibi nwere iru mmiri nke 65%, diacetate nwere otu mmiri mmiri dị ka owu, ma na-arụ ọrụ ihicha ngwa ngwa karịa owu, n'ihi ya, ọ nwere ike ịmịnye ikuku mmiri nke ahụ mmadụ na-ekpochapụ nke ọma ma wepụ ya n'otu oge. Ka ndị mmadụ nwee ahụ iru ala. N'otu oge ahụ, ịrụ ọrụ ntinye mmiri dị mma nwere ike belata mkpokọta ọkụ eletrik, nke na-adịghị mfe ịmepụta ọkụ eletrik.

2. eriri Diacetate nwere mmetụ dị nro

Modules nke mbụ dị ala, na eriri na-adịghị ike ma na-agbanwe n'okpuru ọrụ nke obere ibu, na-egosi àgwà dị nro, ya mere akpụkpọ ahụ nwere mmetụta dị nro na nke dị mma. Ma ọ bụrụ na modul mbụ dị ala, ọ ga-adị ike.

Modules nke mbụ dị elu, na eriri ahụ siri ike na ọ dịghị mfe ịgbagọ n'okpuru ọrụ nke obere ibu, na-egosi àgwà siri ike.

3. eriri diacetate nwere arụmọrụ deodorization pụtara ìhè

Gịnị mere ákwà acetate ji nwee ọdịdị dị mma?

1. Diacetate eriri nwere nro luster dị ka pearl

Akụkụ obe nke silk mulberry bụ triangle na-adịghị agafe agafe, akụkụ obe nke eriri acetate bụ concave convex na-adịghị agbanwe agbanwe. Ha abụọ nwere ọnyá ogologo na ngalaba ogologo ha, na-eme ka ìhè transverse ha gbasaa na ìhè ogologo oge na-agbasa. Ndekọ refractive dị ala, 1.48. Ya mere, silk mulberry ma na-enye ihe dị nro dị ka pearl.

2. Cellulose Acetate nwere ọmarịcha drapability

Modules nke mbụ nke eriri bụ 30-45cn/dtex, isi ike adịghị ike, akụkụ obe bụ concave convex na-adịghị mma, akwa ahụ dị nro, na mmetụta draping dị mma.

3. Diacetate eriri nwere agba agba na agba agba

Ụcha eriri acetate, chromatography zuru oke, agba zuru oke ma dị ọcha, ngwa ngwa agba mara mma.

4. Acetate fiber nwere ezigbo nkwụsi ike akụkụ

Fibre mmanya nwere obere mgbasawanye na mmiri, n'ihi ya, ọ nwere ezigbo nkwụsi ike akụkụ mgbe emechara ya ákwà iji nọgide na-enwe mma nke uwe.

5. Diacetate eriri nwere ihe na-eme ka ihe na-eme ka ọ ghara ịdị mma

Maka unyi nwere uzuzu, mmiri na mmanụ, ọ dịghị mfe imerụ ya ma dị mfe ihicha