GB/T 42270-2022Test methods of hydrophobic characteristics for porous hydrophobic membrane (English PDF)
多孔疏水膜的疏水性能测试方法
This is a limited preview
Buy now to download the full PDF (15 pages)
Need quotation for your management?
Get a formal quotation for GB/T 42270-2022 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 30, 2022
Implementation date
April 1, 2023
Scope
GB/T 42270-2022 is the English-translated version of 多孔疏水膜的疏水性能测试方法.
GB/T 42270-2022 is the Chinese test method for the hydrophobicity of porous hydrophobic membranes.
Clause 1 states that it describes the determination of water penetration pressure and critical wetting value, and that it applies to testing membranes whose channels remain in the gas or oil phase and whose pore size lies in the range 0.01 µm to 10.0 µm.
Clause 3 defines the first as the minimum pressure needed for water to pass through the membrane, in MPa, and the second as the greatest wetting depth from which the membrane can still self-dehydrate, in µm; it also distinguishes internal-pressure from external-pressure use, by whether the inner or the outer surface meets the feed.
It quotes GB/T 6682 for laboratory water and GB/T 38902-2020 for hollow fibre cross-sections. Issued on 30 December 2022, it has applied since 1 April 2023.
Found what you need?
Document preview — GB/T 42270-2022
National Standard of the People's Republic of China
- ICS
- 71.040.99
- Classification
- J 77
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.
1 Scope
This document describes the test method for water penetration pressure and critical wetting value of porous hydrophobic membranes.
This document is applicable to the separation in which the membrane channel remains in the gas phase or oil phase during the membrane separation process, and the pore size ranges from 0.01 µm to 10.0 µm. Testing of membrane hydrophobic properties.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 32373-2015 Test method for reverse osmosis membrane
GB/T 38902-2020 Image Analysis Method for Determination of Sectional Dimensions of Hollow Fiber Membranes
YY/T 0282 injection needle
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 During
the membrane separation process, the membrane channel remains in the gas phase or oil phase, and the separation membrane has a pore size ranging from 0.01 µm to 10.0 µm.
3.2
Hollow fiber and tubular porous hydrophobic membranes used in a state where the inner surface of the membrane is in contact with the raw material solution.
3.3
Hollow fiber and tubular porous hydrophobic membranes used in a state where the outer surface of the membrane is in contact with the raw material solution.
3.4 Liquid pressure
The minimum pressure required for water to pass through a porous hydrophobic membrane.
Note: The unit is megapascal (MPa).
3.5 Critical wetting value
The maximum wetting depth at which a porous hydrophobic membrane can self-dehydrate.
Note: The unit is micron (µm).
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
How to Download GB/T 42270-2022
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
Related Standards
GB/T 38902-2020 — Determination of hollow fiber membrane cross-section dimensions—Image analysis method
GB/T 6682-2008 — Water for analytical laboratory use - Specification and test methods
YY/T 0282-1995 — Injection needles
Secure payment via Stripe
Payments accepted
GB/T 42270-2022
$180.00